Property tax

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Posted by kaori 04/19/2009 @ 23:11

Tags : property tax, taxes, finance

News headlines
Attorney General files suit against companies offering property ... - San Jose Mercury News
By Jondi Gumz - Sentinel staff writer Attorney General Edmund G. Brown Jr. today filed suit against two San Diego companies, alleging notices mailed to tens of thousands of homeowners to reduce their property tax assessments for a $200 fee constituted...
Mayor, Council reach an accord on tax rise - Philadelphia Inquirer
By Jeff Shields and Marcia Gelbart Dropping his push for a steep but temporary two-year increase in property taxes, Mayor Nutter yesterday agreed to back City Council's proposal for a five-year sales-tax increase to help close Philadelphia's $1.4...
Cobb weighs penny tax to reduce property levy - Atlanta Journal Constitution
By Mary Lou Pickel Cobb County could ask voters whether they want to increase sales taxes to pay for county services and, in exchange, get a break on property taxes. Sam Olens, chairman of the Cobb County Commission, cited the public's displeasure with...
$434.8M budget OK'd; real estate tax remains same - WTKR Your NewsChannel 3
The real estate tax rate will remain at $1.04 per $100 of assessed value, meaning $2080 in taxes on a $200000 house, not including exemptions or discounts. The council abolished a personal property tax on recreational vehicles, campers and vehicles...
State files charges against property tax scammers - Daily Breeze
By Muhammed El-Hasan Staff Writer California Attorney General Jerry Brown filed a civil suit against two brothers who "ripped off homeowners" in an alleged property tax scam that targeted the South Bay and other parts of the state....
Orange budget lowers tax rate to 85.8 cents - News & Observer
The owner of a home valued at $300000 would pay $2574 in county taxes next year. REVENUE NEUTRAL: Property taxes make up nearly three-fourths of the general fund revenue. The revenue neutral tax rate is designed to bring in the same amount of property...
Hermosa Beach resolution opposes state property tax seizure - Daily Breeze
Hermosa Beach city leaders Tuesday adopted a resolution declaring a "state of severe fiscal hardship" in opposition to a state proposal to seize property tax funds as a way to fund its budget. Lomita is slated to follow suit May 18, making the two...
Property-tax increase expected in Elk Ridge - Deseret News
By Rodger L. Hardy ELK RIDGE — For the first time in eight years, Elk Ridge residents can expect a property-tax increase. The City Council on Tuesday decided by consensus to hold a truth-in-taxation hearing in early August to decide the new tax rate....

Property tax

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Property tax, or millage tax, is an ad valorem tax that an owner is required to pay on the value of the property being taxed. Property tax can be defined as "generally, tax imposed by municipalities upon owners of property within their jurisdiction based on the value of such property." There are three species or types of property: Land, Improvements to Land (immovable manmade objects; i.e., buildings), and Personal (movable manmade objects). Real estate, real property or realty are all terms for the combination of land and improvements. The taxing authority requires and/or performs an appraisal of the monetary value of the property, and tax is assessed in proportion to that value. Forms of property tax used vary between countries and jurisdictions.

The special assessment tax may often be confused with the property tax. These are two distinct forms of taxation: one (ad valorem tax) relies upon the fair market value of the property being taxed for justification, and the other (special assessment) relies upon a special enhancement called a "benefit" for its justification.

The property tax rate is often given as a percentage. It may also be expressed as a permille (amount of tax per thousand currency units of property value), which is also known as a millage rate or mill levy. (A mill is also one-thousandth of a currency unit.) To calculate the property tax, the authority will multiply the assessed value of the property by the mill rate and then divide by 1,000. For example, a property with an assessed value of US$ 500,000 located in a municipality with a mill rate of 20 mills would have a property tax bill of US$ 10,000.00 per year.

Australia like many other countries have property taxes which are known as Property or Land Rates. Land rates are determined by each local council. Inside each council are land valuers who value the lands worth. The lands worth is not to be mistaken as house and land, this is just the lands values as if there was no existing dwelling. Depending upon the value of the land determines the total charges of rates. Each council differs greatly but most rates are paid quarterly. Rates can range from $100 per quarter to $1,000 per quarter depending on your house location and the value of your land. What Australian's also pay along with land rates are water rates. Some councils include this in the total of the rates notice and provide a breakdown of water and land charges whilst other councils may charge this separately. Depending on your usage also depends on the amount in which you will pay each quarter. It's best to telephone your local council to get exact details for the house in which you are buying.

Many provinces in Canada levy property tax on real estate based upon the current use and value of the land and this is the major source of revenue for most municipal governments in Canada. While property tax levels vary among municipalities in a province there is usually common property assessment or valuation criteria laid out in provincial legislation. There is a trend to use a market value standard for valuation purposes in most provinces with varying revaluation cycles. A number of provinces have established an annual reassessment cycle where market activity warrants while others have longer periods between valuation periods.

In Hong Kong , there is a kind of tax named a property tax, but it is not an ad valorem tax; it is actually classified as an income tax.

According to HK Inland Revenue Ordinance IRO s5B, all property owners shall not be subject to this tax; unless the HK property owner has received a consideration, the example is rental income for the year of assessment. The property tax shall be computed on the net assessable value at the standard rate.

The period of assessment is from April 1 to March 31 of the following year.

This tax is paid in the same way as a mortgage, an annual payment depending on the value of one's assets, such as property.

Property tax (Dutch: Onroerend goed belasting or Onroerende zaak belasting (OZB) ) is levied on homes on a municipal basis in two parts: for the one who lives in the house, and for the owner of the house. When one has a rental home, he/she should only pay the living part of the tax. The last year's lots caused concern because of the annual raise of this tax by more than 10% in some municipalities. As of 2005, there was a Parliament proposal to retain only the owner's part of the property tax, and to raise it annually not more than the inflation rate.

In the United States, property tax on real estate is usually levied by local government, at the municipal or county level. A very important benefit of a tax on property over a tax on income is that the revenue always equals the tax levy, unlike income or sales taxes, which can result in shortfalls producing budget deficits. The property tax always produces the required revenue for municipalities' tax levies.

The assessment is made up of two components—the improvement or building value, and the land or site value. In some states, personal property is also taxed. A tax assessor is a public official who determines the value of real property for the purpose of apportioning the tax levy. An appraiser may work for government or private industry and may determine the value of real property for any purpose.

Tax assessor offices maintain inventory information about improvements to real estate. They also create and maintain tax maps. This is accomplished with the help of surveyors. On tax maps, individual properties are shown and given unique parcel identifiers (commonly called Assessor's Parcel Numbers, or APNs). The tax maps help to ensure that no properties are omitted from the tax rolls and that no properties are taxed more than once. Real property taxes are usually collected by an official other than the assessor. One example of proposed reform is to create a "two-rate" property and land value tax.

The assessment of an individual piece of real estate may be according to one or more of the normally accepted methods of valuation (i.e. income approach, market value or replacement cost). Assessments may be given at 100 percent of value or at some lesser percentage. In most if not all assessment jurisdictions, the determination of value made by the assessor is subject to some sort of administrative or judicial review, if the appeal is instituted by the property owner.

Ad valorem (of value) property taxes are based on fair market property values of individual estates. A local tax assessor then applies an established assessment rate to the fair market value. By multiplying the tax rate x against the assessed value of the property, a tax due is calculated.

Property taxes are imposed by counties, municipalities, and school districts, where the millage rate is usually determined by county commissioners, city council members, and school board members, respectively. The taxes fund budgets for schools, police, fire stations, hospitals, garbage disposal, sewers, road and sidewalk maintenance, parks, libraries, and miscellaneous expenditures.

Relatively recently, US property tax rates increased well above similar rates in other countries, and exceeded 5% in some US states, thus becoming the main dwelling expense after construction.

Property taxes were once a major source of revenue at the state level, particularly prior to 1900, which was before states switched to relying upon income tax and sales tax as their main sources of revenue .

After determining a budget at the municipal level, a legislative appropriation determines how the monies will be collected and distributed. After that, a tax authority levies the tax. An appeal is permitted. Equalization is then considered by a board of equalizers to assure fair treatment. Then a tax rate is determined by dividing the municipal budget by the assessment role of that municipality. Multiplying tax rate by the assessed value of one's property determines one's tax rate.

Some jurisdictions have both ad valorem and non-ad valorem property taxes (better known as special assessments). The latter come in the form of a fixed charge (regardless of the value of the underlying property) for items such as street lighting and storm sewer control.

Personal property taxes can be assessed at almost any level of government, though they are perhaps most commonly assessed by states.

Some exemptions are available to homeowners in certain counties. In California, both Los Angeles County and Ventura county offer a Homeowners exemption for property owners that live in the home.

In Texas, property taxes are used to fund public school districts.

In the absence of urban planning policies, property tax on real estate changes the incentives for developing land, which in turn affects land use patterns. One of the main concerns is whether or not it encourages urban sprawl.

The market value of undeveloped real estate reflects a property's current use as well as its development potential. As a city expands, relatively cheap and undeveloped lands (such as farms, ranches, private conservation parks, etc.) increase in value as neighboring areas are developed into retail, industrial, or residential units. This raises the land value, which increases the property tax that must be paid on agricultural land, but does not increase the amount of revenue per land area available to the owner. This, along with a higher sale price, increases the incentive to rent or sell agricultural land to developers. On the other hand, a property owner who develops a parcel must thereafter pay a higher tax, based on the value of the improvements. This makes the development less attractive than it would otherwise be. Overall, these effects result in lower density development, which tends to increase sprawl.

Property tax has been thought, by some, to be regressive (that is, to fall disproportionately on those of lower income) when not correctly implemented because of its impact on particular low-income/high-asset groups such as pensioners and farmers in drought years. Because these persons have high-assets accumulated over time, they have a high property tax liability, although their realized income is low. Therefore, a larger proportion of their income goes to paying the tax. In areas with speculative land appreciation (such as California in the 1970s and 2000s), there may be little or no relationship between property taxes and a homeowner's ability to pay them short of selling the property. This issue was a common argument used by supporters of such measures as California Proposition 13 or Oregon Ballot Measure 5; some economists have even called for the abolition of property taxes altogether, to be replaced by income taxes, consumption taxes such as Europe's VAT, or a combination of both. Others, however, have argued that property taxes are broadly progressive, since people of higher incomes are disproportionately likely to own more valuable property. In addition, while nearly all households have some income, nearly a third of households own no real estate. Moreover, the most valuable properties are owned by corporations not individuals. Hence, property is more maldistributed than income.

It has been suggested that these two beliefs are not incompatible - it is possible for a tax to be progressive in general but to be regressive in relation to minority groups. However, although not direct, and not likely one-to-one, property renters can be subject to property taxes as well. If the tax reduces the supply of housing units, then it will increase the rental price. In this way, the owner's cost of taxation is passed on to the renter (occupant).

As property increases in value the possibility exists that new buyers might pay taxes on outdated values thus placing an unfair burden on the rest of the property owners. To correct this imbalance municipalities periodically revalue property. Revaluation produces an up to date value to be used in determination of the tax rate necessary to produce the required tax levy.

A consequence of this is that existing owners are reassessed as well as new owners and thus are required to pay taxes on property the value of which is determined by market forces, such as gentrification in low income areas of a city. In an effort to relieve the frequently large tax burdens on existing owners, particularly those with fixed incomes such as the elderly and those who have lost their jobs, communities have introduced exemptions.

In some states, laws provide for exemptions (typically called homestead exemptions) and/or limits on the percentage increase in tax, which limit the yearly increase in property tax so that owner-occupants are not "taxed out of their homes". Generally, these exemptions and ceilings are available only to property owners who use their property as their principal residence. Homestead exemptions generally cannot be claimed on investment properties and second homes. When a homesteaded property changes ownership, the property tax often rises sharply and the property's sale price may become the basis for new exemptions and limits available to the new owner-occupant.

Homestead exemptions increase the complexity of property tax collection and sometimes provide an easy opportunity for people who own several properties to benefit from tax credits to which they are not entitled. Since there is no national database that links home ownership with Social Security numbers, landlords sometimes gain homestead tax credits by claiming multiple properties in different states, and even their own state, as their "principal residence", while only one property is truly their residence. In 2005, several US Senators and Congressmen were found to have erroneously claimed "second homes" in the greater Washington, D.C. area as their "principal residences", giving them property tax credits to which they were not entitled.

Undeserved homestead exemption credits became so ubiquitous in the state of Maryland that a law was passed in the 2007 legislative session to require validation of principal residence status through the use of a social security number matching system. The bill passed unanimously in the Maryland House of Delegates and Senate and was signed into law by the Governor.

In Rhode Island efforts are being made to modify revaluation practices to preserve the major benefit of property taxation, the reliability of tax revenue, while providing for what some view as a correction of the unfair distribution of tax burdens on existing owners of property.

The Supreme Court has held that Congress can directly tax land ownership so long as the tax is apportioned among the states based upon representation/population. In an apportioned land tax, each state would have its own rate of taxation sufficient to raise its pro-rata share of the total revenue to be financed by a land tax. So, for example, if State A has 5% of the population, the State A would collect and remit to the Federal government such tax revenue that equals 5% of the revenue sought. Such an apportioned tax on land had been used on many occasions up through the Civil War.

Indirect taxes on the transfer of land are permitted without apportionment: in the past, this has taken the form of requiring revenue stamps to be affixed to deeds and mortgages, but these are no longer required by federal law. Under the Internal Revenue Code, the government realizes a substantial amount of revenue from income taxes on capital gains from the sale of land, and in estate taxes from the passage of property (including land) upon the death of its owner.

The Supreme Court has not directly ruled on the question of whether Congress may impose an unapportioned tax on the "privilege" of owning land with the "measure" of the tax being the value of the land.

Milton Friedman noted that "he property tax is one of the least bad taxes, because it’s levied on something that cannot be produced — that part that is levied on the land".

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Foreign Investment in Real Property Tax Act

The Foreign Investment in Real Property Tax Act of 1980 (FIRPTA) is a law of the United States of America that applies to the sale of interests held by nonresident aliens and foreign corporations in real property located within the United States.

FIRPTA authorized the IRS to apply a withholding income tax on nonresident aliens and foreign corporations with sales of US real property interests. A real property interest includes sales of real property as well as sales of shares in certain US corporations that primarily hold and sell real property in the US. When a person or corporation purchases a US real property interest from nonresident aliens or foreign corporation, they are required to withhold 10% of the amount realized.

The withholding tax is intended to ensure that the US is able to tax the gains realized on the sale of such interests.

A common exception to FIRPTA withholding is that the person or corporation purchasing the property is not required to withhold tax when the purchaser purchases real estate for his or her own home and the purchase price is $300,000 or less.

The Act is codified in the Internal Revenue Code at 26 U.S.C. § 897, 26 U.S.C. § 1445, and 26 U.S.C. § 6039C.

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Nonbusiness Energy Property Tax Credit


The Nonbusiness energy property tax credit, in the United States, provides a nonrefundable personal tax credit for Federal income tax purposes, for making a home more energy efficient. (Unlike a deduction, which lowers taxable income, a tax credit reduces the actual tax paid, dollar-for-dollar.) This credit was added to the Internal Revenue Code by the Energy Policy Act of 2005.

Nonbusiness energy property provides a 10 percent credit for buying qualified energy efficiency improvements and provides credits in various amounts for costs relating to residential energy property expenses.26 U.S.C. § 25C(a)(2). Labor costs for onsite preparation, assembly, or original installation are included as eligible expenses.

For an improvement to be eligible for the credit it must meet the following qualifications: (1) a component must meet or exceed the criteria established by the 2000 International Energy Conservation Code; (2) component is installed in or on a dwelling unit located in the United States and owned and used by the taxpayer as the taxpayer’s principal residence; (3) the original use of such component commences with the taxpayer and (4) such component reasonably can be expected to remain in use for at least 5 years.

Residential energy property expenditures are eligible for the credit if the purchase: (1) is installed on or in connection with a dwelling unit located in the United States and owned by the taxpayer and used as his principal residence (section 121); (2) the item is originally placed in service by the taxpayer and (3) it is qualified energy property as defined by 26 U.S.C. § 25C(d)(2)(a) that meets certain performance and quality standards established by the code or by the Secretary.

The maximum allowable credit for all eligible taxable years is $500.00, and no more than $200 of the credit can be attributable to windows. Additionally, the sets the following limits on residential energy property expenditures: $50 for any advanced main air circulating fan; $150 for any qualified natural gas, propane, or oil furnace or hot water boiler and $300 for any item of energy-efficient building property.

Items must be placed in service after Dec. 31, 2005 and before Jan. 1, 2008 to be eligible for the credit.

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Property Tax Relief Act of 2006

The Property Tax Relief Act of 2006 was passed on August 25, 2006 by the Idaho Legislature in the U.S.

It was proposed by Idaho governor Jim Risch to be addressed in a special session, or extraordinary session, of the Idaho Legislature.

In May, 2008, state economist Mike Ferguson estimated that the net tax cut was about $30 million.

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Diagram illustrating taxes effect

To tax (from the latin taxare: to estimate, which in turn is from tangere: to touch) is to impose a financial charge or other levy upon a taxpayer (an individual or legal entity) by a state or the functional equivalent of a state.

In modern taxation systems, taxes are levied in money, but in-kind and corvée taxation are characteristic of traditional or pre-capitalist states and their functional equivalents. The method of taxation and the government expenditure of taxes raised is often highly debated in politics and economics. Tax collection is performed by a government agency such as Canada Revenue Agency, the Internal Revenue Service (IRS) in the United States, or Her Majesty's Revenue and Customs (HMRC) in the UK. When taxes are not fully paid, civil penalties (such as fines or forfeiture) or criminal penalties (such as incarceration) may be imposed on the non-paying entity or individual.

Funds provided by taxation have been used by states and their functional equivalents throughout history to carry out many functions. Some of these include expenditures on war, the enforcement of law and public order, protection of property, economic infrastructure (roads, legal tender, enforcement of contracts, etc.), public works, social engineering, and the operation of government itself. Most modern governments also use taxes to fund welfare and public services. These services can include education systems, health care systems, pensions for the elderly, unemployment benefits, and public transportation. Energy, water and waste management systems are also common public utilities. Colonial and modernizing states have also used cash taxes to draw or force reluctant subsistence producers into cash economies.

Governments use different kinds of taxes and vary the tax rates. This is done to distribute the tax burden among individuals or classes of the population involved in taxable activities, such as business, or to redistribute resources between individuals or classes in the population. Historically, the nobility were supported by taxes on the poor; modern social security systems are intended to support the poor, the disabled, or the retired by taxes on those who are still working. In addition, taxes are applied to fund foreign and military aid, to influence the macroeconomic performance of the economy (the government's strategy for doing this is called its fiscal policy - see also tax exemption), or to modify patterns of consumption or employment within an economy, by making some classes of transaction more or less attractive.

A nation's tax system is often a reflection of its communal values or the values of those in power. To create a system of taxation, a nation must make choices regarding the distribution of the tax burden—who will pay taxes and how much they will pay—and how the taxes collected will be spent. In democratic nations where the public elects those in charge of establishing the tax system, these choices reflect the type of community which the public wishes to create. In countries where the public does not have a significant amount of influence over the system of taxation, that system may be more of a reflection on the values of those in power.

The resource collected from the public through taxation is always greater than the amount which can be used by the government. The difference is called compliance cost, and includes for example the labour cost and other expenses incurred in complying with tax laws and rules. The collection of a tax in order to spend it on a specified purpose, for example collecting a tax on alcohol to pay directly for alcoholism rehabilitation centres, is called hypothecation. This practice is often disliked by finance ministers, since it reduces their freedom of action. Some economic theorists consider the concept to be intellectually dishonest since (in reality) money is fungible. Furthermore, it often happens that taxes or excises initially levied to fund some specific government programs are then later diverted to the government general fund. In some cases, such taxes are collected in fundamentally inefficient ways, for example highway tolls.

Some economists, especially neo-classical economists, argue that all taxation creates market distortion and results in economic inefficiency. They have therefore sought to identify the kind of tax system that would minimize this distortion. Also, one of every government's most fundamental duties is to administer possession and use of land in the geographic area over which it is sovereign, and it is considered economically efficient for government to recover for public purposes the additional value it creates by providing this unique service.

Since governments also resolve commercial disputes, especially in countries with common law, similar arguments are sometimes used to justify a sales tax or value added tax. Others (e.g. libertarians) argue that most or all forms of taxes are immoral due to their involuntary (and therefore eventually coercive/violent) nature. The most extreme anti-tax view is anarcho-capitalism, in which the provision of all social services should be voluntarily bought by the person(s) using them.

Taxation has four main purposes or effects: Revenue, Redistribution, Repricing, and Representation.

The main purpose is revenue: taxes raise money to spend on roads, schools and hospitals, and on more indirect government functions like market regulation or justice systems. This is the most widely known function.

A second is redistribution. Normally, this means transferring wealth from the richer sections of society to poorer sections.

A third purpose of taxation is repricing. Taxes are levied to address externalities: tobacco is taxed, for example, to discourage smoking, and many people advocate policies such as implementing a carbon tax.

A fourth, consequential effect of taxation in its historical setting has been representation. The American revolutionary slogan "no taxation without representation" implied this: rulers tax citizens, and citizens demand accountability from their rulers as the other part of this bargain. Several studies have shown that direct taxation (such as income taxes) generates the greatest degree of accountability and better governance, while indirect taxation tends to have smaller effects.

An important feature of tax systems is the percentage of the tax burden as it relates to income or consumption. The terms progressive, regressive, and proportional are used to describe the way the rate progresses from low to high, from high to low, or proportionally. The terms describe a distribution effect, which can be applied to any type of tax system (income or consumption) that meets the definition. A progressive tax is a tax imposed so that the effective tax rate increases as the amount to which the rate is applied increases. The opposite of a progressive tax is a regressive tax, where the effective tax rate decreases as the amount to which the rate is applied increases. In between is a proportional tax, where the effective tax rate is fixed as the amount to which the rate is applied increases. The terms can also be used to apply meaning to the taxation of select consumption, such as a tax on luxury goods and the exemption of basic necessities may be described as having progressive effects as it increases a tax burden on high end consumption and decreases a tax burden on low end consumption.

Taxes are sometimes referred to as direct tax or indirect tax. The meaning of these terms can vary in different contexts, which can sometimes lead to confusion. In economics, direct taxes refer to those taxes that are collected from the people or organizations on whom they are ostensibly imposed. For example, income taxes are collected from the person who earns the income. By contrast, indirect taxes are collected from someone other than the person ostensibly responsible for paying the taxes. In law, the terms may have different meanings. In U.S. constitutional law, for instance, direct taxes refer to poll taxes and property taxes, which are based on simple existence or ownership. Indirect taxes are imposed on rights, privileges, and activities. Thus, a tax on the sale of property would be considered an indirect tax, whereas the tax on simply owning the property itself would be a direct tax. The distinction can be subtle between direct and indirect taxation, but can be important under the law.

Law establishes from whom a tax is collected. In many countries, taxes are imposed on business (such as corporate taxes or portions of payroll taxes). However, who ultimately pays the tax (the tax "burden") is determined by the marketplace as taxes become embedded into production costs. Depending on how quantities supplied and demanded vary with price (the "elasticities" of supply and demand), a tax can be absorbed by the seller (in the form of lower pre-tax prices), or by the buyer (in the form of higher post-tax prices). If the elasticity of supply is low, more of the tax will be paid by the supplier. If the elasticity of demand is low, more will be paid by the customer. And contrariwise for the cases where those elasticities are high. If the seller is a competitive firm, the tax burden flows back to the factors of production depending on the elasticities thereof; this includes workers (in the form of lower wages), capital investors (in the form of loss to shareholders), landowners (in the form of lower rents) and entrepreneurs (in the form of lower wages of superintendence).

To illustrate this relationship, suppose the market price of a product is US$1.00, and that a $0.50 tax is imposed on the product that, by law, is to be collected from the seller. If the product is a luxury (in the economic sense of the term), a greater portion of the tax will be absorbed by the seller. This is because a luxury good has elastic demand which would cause a large decline in quantity demanded for a small increase in price. Therefore in order to stabilise sales, the seller absorbs more of the additional tax burden. For example, the seller might drop the price of the product to $0.70 so that, after adding in the tax, the buyer pays a total of $1.20, or $0.20 more than he did before the $0.50 tax was imposed. In this example, the buyer has paid $0.20 of the $0.50 tax (in the form of a post-tax price) and the seller has paid the remaining $0.30 (in the form of a lower pre-tax price).

The first known system of taxation was in Ancient Egypt around 3000 BC - 2800 BC in the first dynasty of the Old Kingdom. Records from the time document that the pharaoh would conduct a biennial tour of the kingdom, collecting tax revenues from the people. Other records are granary receipts on limestone flakes and papyrus. Early taxation is also described in the Bible. In Genesis (chapter 47, verse 24 - the New International Version), it states "But when the crop comes in, give a fifth of it to Pharaoh. The other four-fifths you may keep as seed for the fields and as food for yourselves and your households and your children." Joseph was telling the people of Egypt how to divide their crop, providing a portion to the Pharaoh. A share (20%) of the crop was the tax.

In India, Islamic rulers imposed jizya starting in the 11th century. It was abolished by Akbar. Quite a few records of government tax collection in Europe since at least the 17th century are still available today. But taxation levels are hard to compare to the size and flow of the economy since production numbers are not as readily available. Government expenditures and revenue in France during the 17th century went from about 24.30 million livres in 1600-10 to about 126.86 million livres in 1650-59 to about 117.99 million livres in 1700-10 when government debt had reached 1.6 billion livres. In 1780-89 it reached 421.50 million livres. Taxation as a percentage of production of final goods may have reached 15% - 20% during the 17th century in places like France, the Netherlands, and Scandinavia. During the war-filled years of the eighteenth and early nineteenth century, tax rates in Europe increased dramatically as war became more expensive and governments became more centralized and adept at gathering taxes. This increase was greatest in England, Peter Mathias and Patrick O'Brien found that the tax burden increased by 85% over this period. Another study confirmed this number, finding that per capita tax revenues had grown almost sixfold over the eighteenth century, but that steady economic growth had made the real burden on each individual only double over this period before the industrial revolution. Average tax rates were higher in Britain than France the years before the French Revolution, twice in per capita income comparison, but they were mostly placed on international trade. In France, taxes were lower but the burden was mainly on landowners, individuals, and internal trade and thus created far more resentment.

Taxation as a percentage of GDP in 2003 was 56.1% in Denmark, 54.5% in France, 49.0% in the Euro area, 42.6% in the United Kingdom, 35.7% in the United States, 35.2% in The Republic of Ireland, and among all OECD members an average of 40.7%.

In monetary economies prior to fiat banking, a critical form of taxation was seigniorage, the tax on the creation of money.

Some principalities taxed windows, doors, or cabinets to reduce consumption of imported glass and hardware. Armoires, hutches, and wardrobes were employed to evade taxes on doors and cabinets. In extraordinary circumstances, taxes are also used to enforce public policy like congestion charge (to cut road traffic and encourage public transport) in London. In Tsarist Russia, taxes were clamped on beards. Today, one of the most complicated taxation-systems worldwide is in Germany. Three quarters of the world's taxation-literature refers to the German system. There are 118 laws, 185 forms, and 96,000 regulations, spending €3.7 billion to collect the income tax. Today, governments of advanced economies of EU, North America, and others rely more on direct taxes, while those of developing economies of India, Africa, and others rely more on indirect taxes.

Taxes are most often levied as a percentage, called the tax rate. An important distinction when talking about tax rates is to distinguish between the marginal rate and the effective (average) rate. The effective rate is the total tax paid divided by the total amount the tax is paid on, while the marginal rate is the rate paid on the next dollar of income earned. For example, if income is taxed on a formula of 5% from $0 up to $50,000, 10% from $50,000 to $100,000, and 15% over $100,000, a taxpayer with income of $175,000 would pay a total of $18,750 in taxes.

In economic terms, taxation transfers wealth from households or businesses to the government of a nation. The side-effects of taxation and theories about how best to tax are an important subject in microeconomics. Taxation is almost never a simple transfer of wealth. Economic theories of taxation approach the question of how to minimize the loss of economic welfare through taxation and also discuss how a nation can perform redistribution of wealth in the most efficient manner.

For goods supplied in a perfectly competitive market, tax reduces economic efficiency, by introducing a deadweight loss. In a perfect market, the price of a particular economic good adjusts to make sure that all trades which benefit both the buyer and the seller of a good occur. After introducing a tax, the price received by the seller is less than the cost to the buyer. This means that fewer trades occur and that the individuals or businesses involved gain less from participating in the market. This destroys value, and is known as the 'deadweight cost of taxation'.

The deadweight cost is dependent on the elasticity of supply and demand for a good.

Most taxes—including income tax and sales tax—can have significant deadweight costs. The only way to completely avoid deadweight costs in an economy which is generally competitive is to find taxes which do not change economic incentives, such as the land value tax, where the tax is on a good in completely inelastic supply, a lump sum tax such as a poll tax which is paid by all adults regardless of their choices, or a windfall profits tax which is entirely unanticipated and so cannot affect decisions.

In some cases where the economy is not perfectly competitive, the existence of a tax can increase economic efficiency. If there is a negative externality associated with a good, meaning that it has negative effects not felt by the consumer, then the free market will trade too much of that good. By putting a tax on the good, the government can increase overall welfare as well as raising revenue in taxation. This is known as a 'double dividend'.

There are a wide range of goods where there is, or is claimed to be, a negative externality. Polluting fuels (like petrol), goods which incur public healthcare costs (such as alcohol or tobacco), and charges for existing 'free' public goods (like congestion charging) all offer the possibility of a double dividend. This type of tax is a Pigovian tax, sometimes colloquially known as a 'sin tax'. It is worthwhile noting that taxation is not necessarily the only, or the best, method of dealing with negative externalities.

Another concern is that the complicated tax codes of developed economies offer perverse economic incentives. The more details of tax policy there are, the more opportunities for legal tax avoidance and illegal tax evasion; these not only result in lost revenue, but involve additional deadweight costs: for instance, payments made for tax advice are essentially deadweight costs because they add no wealth to the economy. Perverse incentives also occur because of non-taxable 'hidden' transactions; for instance, a sale from one company to another might be liable for sales tax, but if the same goods were shipped from one branch of a corporation to another, no tax would be payable.

To address these issues, economists often suggest simple and transparent tax structures which avoid providing loopholes. Sales tax, for instance, can be replaced with a value added tax which disregards intermediate transactions.

Economic theory suggests that the economic effect of tax does not necessarily fall at the point where it is legally levied. For instance, a tax on employment paid by employers will impact on the employee, at least in the long run. The greatest share of the tax burden tends to fall on the most inelastic factor involved - the part of the transaction which is affected least by a change in price. So, for instance, a tax on wages in a town will (at least in the long run) affect property-owners in that area.

Although governments must spend money on tax collection activities, some of the costs, particularly for keeping records and filling out forms, are borne by businesses and by private individuals. These are collectively called costs of compliance. More complex tax systems tend to have higher costs of compliance. This fact can be used as the basis for practical or moral arguments in favor of tax simplification (see, for example, FairTax), or tax elimination (in addition to moral arguments described above).

An ad valorem tax is one where the tax base is the value of a good, service, or property. Sales taxes, tariffs, property taxes, inheritance taxes, and value added taxes are different types of ad valorem tax. An ad valorem tax is typically imposed at the time of a transaction (sales tax or value added tax (VAT)) but it may be imposed on an annual basis (property tax) or in connection with another significant event (inheritance tax or tariffs). An alternative to ad valorem taxation is an excise tax, where the tax base is the quantity of something, regardless of its price. For example, in the United Kingdom, a tax is collected on the sale of alcoholic drinks that is calculated by volume and beverage type, rather than the price of the drink.

A capital gains tax is the tax levied on the profit released upon the sale of a capital asset. In many cases, the amount of a capital gain is treated as income and subject to the marginal rate of income tax. However, in an inflationary environment, capital gains may be to some extent illusory: if prices in general have doubled in five years, then selling an asset for twice the price it was purchased for five years earlier represents no gain at all. Partly to compensate for such changes in the value of money over time, some jurisdictions, such as the United States, give a favorable capital gains tax rate based on the length of holding. European jurisdictions have a similar rate reduction to nil on certain property transactions that qualify for the participation exemption. In Canada, 50% of the gain is taxable income. In India, Short Term Capital Gains Tax (arising before 1 year) is 10% flat rate of the gains and Long Term Capital Gains Tax is nil for stocks & mutual fund units held 1 year or more and 20% for any other assets held 3 years or more. If such a tax is levied on inherited property, it can act as a de facto probate or inheritance tax.

A consumption tax is a tax on non-investment spending, and can be implemented by means of a sales tax or by modifying an income tax to allow for unlimited deductions for investment or savings.

Corporate tax refers to a direct tax levied by various jurisdictions on the profits made by companies or associations and often includes capital gains of a company. Earnings are generally considered gross revenue less expenses. Corporate expenses that relate to capital expenditures are usually deducted in full (for example, trucks are fully deductible in the Canadian tax system, while a corporate sports car is only partly deductible). They are often deducted over the useful life of the asset purchase. Notably, accounting rules about deductible expenses and tax rules about deductible expense will differ at times, giving rise to book-tax differences. If the book-tax difference is carried over more than a year, it is referred to as a temporary difference, which then creates deferred tax assets and liabilities for the corporation, which are carried on the balance sheet.

This includes natural resources consumption tax, GreenHouse gas tax (Carbon tax), "sulfuric tax", and others. The stated purpose is to reduce the environmental impact by repricing.

Unlike an ad valorem, an excise is not a function of the value of the product being taxed. Excise taxes are based on the quantity, not the value, of product purchased. For example, in the United States, the Federal government imposes an excise tax of 18.4 cents per U.S. gallon (4.86¢/L) of gasoline, while state governments levy an additional 8 to 28 cents per U.S. gallon. Excises on particular commodities are frequently hypothecated. For example, a fuel excise (use tax) is often used to pay for public transportation, especially roads and bridges and for the protection of the environment. A special form of hypothecation arises where an excise is used to compensate a party to a transaction for alleged uncontrollable abuse; for example, a blank media tax is a tax on recordable media such as CD-Rs, whose proceeds are typically allocated to copyright holders. Critics charge that such taxes blindly tax those who make legitimate and illegitimate usages of the products; for instance, a person or corporation using CD-R's for data archival should not have to subsidize the producers of popular music.

Excises (or exemptions from them) are also used to modify consumption patterns (social engineering). For example, a high excise is used to discourage alcohol consumption, relative to other goods. This may be combined with hypothecation if the proceeds are then used to pay for the costs of treating illness caused by alcohol abuse. Similar taxes may exist on tobacco, pornography, etc., and they may be collectively referred to as "sin taxes". A carbon tax is a tax on the consumption of carbon-based non-renewable fuels, such as petrol, diesel-fuel, jet fuels, and natural gas. The object is to reduce the release of carbon into the atmosphere. In the United Kingdom, vehicle excise duty is an annual tax on vehicle ownership.

An income tax is a tax levied on the financial income of persons, corporations, or other legal entities. Various income tax systems exist, with varying degrees of tax incidence. Income taxation can be progressive, proportional, or regressive. When the tax is levied on the income of companies, it is often called a corporate tax, corporate income tax, or corporation tax. Individual income taxes often tax the total income of the individual (with some deductions permitted), while corporate income taxes often tax net income (the difference between gross receipts, expenses, and additional write-offs).

The "tax net" refers to the types of payment that are taxed, which included personal earnings (wages), capital gains, and business income. The rates for different types of income may vary and some may not be taxed at all. Capital gains may be taxed when realized (e.g. when shares are sold) or when incurred (e.g. when shares appreciate in value). Business income may only be taxed if it is significant or based on the manner in which it is paid. Some types of income, such as interest on bank savings, may be considered as personal earnings (similar to wages) or as a realized property gain (similar to selling shares). In some tax systems, personal earnings may be strictly defined where labor, skill, or investment is required (e.g. wages); in others, they may be defined broadly to include windfalls (e.g. gambling wins).

Personal income tax is often collected on a pay-as-you-earn basis, with small corrections made soon after the end of the tax year. These corrections take one of two forms: payments to the government, for taxpayers who have not paid enough during the tax year; and tax refunds from the government for those who have overpaid. Income tax systems will often have deductions available that lessen the total tax liability by reducing total taxable income. They may allow losses from one type of income to be counted against another. For example, a loss on the stock market may be deducted against taxes paid on wages. Other tax systems may isolate the loss, such that business losses can only be deducted against business tax by carrying forward the loss to later tax years.

Inheritance tax, estate tax, and death tax or duty are the names given to various taxes which arise on the death of an individual. In United States tax law, there is a distinction between an estate tax and an inheritance tax: the former taxes the personal representatives of the deceased, while the latter taxes the beneficiaries of the estate. However, this distinction does not apply in other jurisdictions; for example, if using this terminology UK inheritance tax would be an estate tax.

A poll tax, also called a per capita tax, or capitation tax, is a tax that levies a set amount per individual. It is example of the concept of fixed tax. One of the earliest taxes mentioned in the Bible of a half-shekel per annum from each adult Jew (Ex. 30:11-16) was a form of poll tax. Poll taxes are administratively cheap because they are easy to compute and collect and difficult to cheat. Economists have considered poll taxes economically efficient because people are presumed to be in fixed supply. However, poll taxes are very unpopular because poorer people pay a higher proportion of their income than richer people. In addition, the supply of people is in fact not fixed over time: on average, couples will choose to have fewer children if a poll tax is imposed. The introduction of a poll tax in medieval England was the primary cause of the 1381 Peasants' Revolt, and in England and Wales in 1990 the change from a progressive local taxation based on property values to a single-rate form of taxation regardless of ability to pay (the Community Charge, but more popularly referred to as the Poll Tax), led to widespread refusal to pay and to incidents of civil unrest, known colloquially as the 'Poll Tax riots'.

A property tax is a tax imposed on property by reason of its ownership. Property tax can be defined as "generally, tax imposed by municipalities upon owners of property within their jurisdiction based on the value of such property." There are three species of property: land, improvements to land (immovable man-made things, e.g. buildings) and personal property (movable things). Real estate or realty is the combination of land and improvements to land.

Property taxes are usually charged on a recurrent basis (e.g., yearly). A common type of property tax is an annual charge on the ownership of real estate, where the tax base is the estimated value of the property. For a period of over 150 years from 1695 a window tax was levied in England, with the result that one can still see listed buildings with windows bricked up in order to save their owners money. A similar tax on hearths existed in France and elsewhere, with similar results. The two most common type of event driven property taxes are stamp duty, charged upon change of ownership, and inheritance tax, which is imposed in many countries on the estates of the deceased.

In contrast with a tax on real estate (land and buildings), a land value tax is levied only on the unimproved value of the land ("land" in this instance may mean either the economic term, i.e., all natural resources, or the natural resources associated with specific areas of the earth's surface: "lots" or "land parcels"). Proponents of land value tax argue that it is economically justified, as it will not deter production, distort market mechanisms or otherwise create deadweight losses the way other taxes do.

When real estate is held by a higher government unit or some other entity not subject to taxation by the local government, the taxing authority may receive a payment in lieu of taxes to compensate it for some or all of the foregone tax revenue.

In many jurisdictions (including many American states), there is a general tax levied periodically on residents who own personal property (personalty) within the jurisdiction. Vehicle and boat registration fees are subsets of this kind of tax. The tax is often designed with blanket coverage and large exceptions for things like food and clothing. Household goods are often exempt when kept or used within the household. Any otherwise non-exempt object can lose its exemption if regularly kept outside the household. Thus, tax collectors often monitor newspaper articles for stories about wealthy people who have lent art to museums for public display, because the artworks have then become subject to personal property tax. If an artwork had to be sent to another state for some touch-ups, it may have become subject to personal property tax in that state as well.

Some countries with social security systems, which provide income to retired workers, fund those systems with specific dedicated taxes. These often differ from comprehensive income taxes in that they are levied only on specific sources of income, generally wages and salary (in which case they are called payroll taxes). A further difference is that the total amount of the taxes paid by or on behalf of a worker is typically considered in the calculation of the retirement benefits to which that worker is entitled. Examples of retirement taxes include the FICA tax, a payroll tax that is collected from employers and employees in the United States to fund the country's Social Security system; and the National Insurance Contributions (NICs) collected from employers and employees in the United Kingdom to fund the country's national insurance system.

These taxes are sometimes regressive in their immediate effect. For example, in the United States, each worker, whatever his or her income, pays at the same rate up to a specified cap, but income over the cap is not taxed. A further regressive feature is that such taxes often exclude investment earnings and other forms of income that are more likely to be received by the wealthy. The regressive effect is somewhat offset, however, by the eventual benefit payments, which typically replace a higher percentage of a lower-paid worker's pre-retirement income.

Sales taxes are levied when a commodity is sold to its final consumer. Retail organizations contend that such taxes discourage retail sales. The question of whether they are generally progressive or regressive is a subject of much current debate. People with higher incomes spend a lower proportion of them, so a flat-rate sales tax will tend to be regressive. It is therefore common to exempt food, utilities and other necessities from sales taxes, since poor people spend a higher proportion of their incomes on these commodities, so such exemptions would make the tax more progressive. This is the classic "You pay for what you spend" tax, as only those who spend money on non-exempt (i.e. luxury) items pay the tax.

A small number of U.S. states rely entirely on sales taxes for state revenue, as those states do not levy a state income tax. Such states tend to have a moderate to large amount of tourism or inter-state travel that occurs within their borders, allowing the state to benefit from taxes from people the state would otherwise not tax. In this way, the state is able to reduce the tax burden on its citizens. The U.S. states that do not levy a state income tax are Alaska, Tennessee, Florida, Nevada, South Dakota, Texas, Washington state, and Wyoming. Additionally, New Hampshire and Tennessee levy state income taxes only on dividends and interest income. Of the above states, only Alaska and New Hampshire do not levy a state sales tax. Additional information can be obtained at the Federation of Tax Administrators website.

In the United States, there is a growing movement for the replacement of all federal payroll and income taxes (both corporate and personal) with a national retail sales tax and monthly tax rebate to households of citizens and legal resident aliens. The tax proposal is named FairTax. In Canada, the federal sales tax is called the Goods and Services tax (GST) and now stands at 5%. The provinces of British Columbia, Saskatchewan, Manitoba, Ontario and Prince Edward Island also have a provincial sales tax . The provinces of Nova Scotia, New Brunswick, and Newfoundland & Labrador have harmonized their provincial sales taxes with the GST - Harmonized Sales Tax , and thus is a full VAT. The province of Quebec collects the Quebec Sales Tax which is based on the GST with certain differences. Most businesses can claim back the GST, HST and QST they pay, and so effectively it is the final consumer who pays the tax.

An import or export tariff (also called customs duty or impost) is a charge for the movement of goods through a political border. Tariffs discourage trade, and they may be used by governments to protect domestic industries. A proportion of tariff revenues is often hypothecated to pay government to maintain a navy or border police. The classic ways of cheating a tariff are smuggling or declaring a false value of goods. Tax, tariff and trade rules in modern times are usually set together because of their common impact on industrial policy, investment policy, and agricultural policy. A trade bloc is a group of allied countries agreeing to minimize or eliminate tariffs against trade with each other, and possibly to impose protective tariffs on imports from outside the bloc. A customs union has a common external tariff, and, according to an agreed formula, the participating countries share the revenues from tariffs on goods entering the customs union.

A toll is a tax or fee charged to travel via a road, bridge, tunnel, canal, waterway or other transportation facilities. Historically tolls have been used to pay for public bridge, road and tunnel projects. They have also been used in privately constructed transport links. The toll is likely to be a fixed charge, possibly graduated for vehicle type, or for distance on long routes.

Shunpiking is the practice of finding another route to avoid payment of tolls. In some situations where tolls were increased or felt to be unreasonably high, informal shunpiking by individuals escalated into a form of boycott by regular users, with the goal of applying the financial stress of lost toll revenue to the authority determining the levy.

Historically, in many countries, a contract needed to have a stamp affixed to make it valid. The charge for the stamp was either a fixed amount or a percentage of the value of the transaction. In most countries the stamp has been abolished but stamp duty remains. Stamp duty is levied in the UK on the purchase of shares and securities, the issue of bearer instruments, and certain partnership transactions. Its modern derivatives, stamp duty reserve tax and stamp duty land tax, are respectively charged on transactions involving securities and land. Stamp duty has the effect of discouraging speculative purchases of assets by decreasing liquidity. In the United States transfer tax is often charged by the state or local government and (in the case of real property transfers) can be tied to the recording of the deed or other transfer documents. Taxes on currency transactions are known as Tobin taxes.

A value added tax (VAT), also known as 'Goods and Services Tax' (G.S.T), Single Business Tax, or Turnover Tax in some countries, applies the equivalent of a sales tax to every operation that creates value. To give an example, sheet steel is imported by a machine manufacturer. That manufacturer will pay the VAT on the purchase price, remitting that amount to the government. The manufacturer will then transform the steel into a machine, selling the machine for a higher price to a wholesale distributor. The manufacturer will collect the VAT on the higher price, but will remit to the government only the excess related to the "value added" (the price over the cost of the sheet steel). The wholesale distributor will then continue the process, charging the retail distributor the VAT on the entire price to the retailer, but remitting only the amount related to the distribution mark-up to the government. The last VAT amount is paid by the eventual retail customer who cannot recover any of the previously paid VAT. For a VAT and sales tax of identical rates, the total tax paid is the same, but it is paid at differing points in the process.

VAT is usually administrated by requiring the company to complete a VAT return, giving details of VAT it has been charged (referred to as input tax) and VAT it has charged to others (referred to as output tax). The difference between output tax and input tax is payable to the Local Tax Authority. If input tax is greater than output tax the company can claim back money from the Local Tax Authority. VAT was historically used to counter evasion in a sales tax or excise. By collecting the tax at each production level, the theory is that the entire economy helps in the enforcement. However, forged invoices and similar evasion methods have demonstrated that there are always those who will attempt to evade taxation.

Economic theorists have argued that the collection process of VAT minimises the market distortion resulting from the tax, compared to a sales tax. However, VAT is held by some to discourage production.

Some countries' governments will require declaration of the tax payers' balance sheet (assets and liabilities), and from that exact a tax on net worth (assets minus liabilities), as a percentage of the net worth, or a percentage of the net worth exceeding a certain level. The tax is in place for both "natural" and in some cases legal "persons".

According to most political philosophies, taxes are justified as they fund activities that are necessary and beneficial to society. Additionally, progressive taxation can be used to reduce inequality in a society. According to this view, taxation in modern nation-states benefit the majority of the population and social development. A common presentation of this view, paraphrasing various statements by Oliver Wendell Holmes, Jr. is "Taxes are the price of civilization".

It can also be argued that in a democracy, because the government is the party performing the act of imposing taxes, society as a whole decides how the tax system should be organized. The American Revolution's "No taxation without representation" slogan implied this view. For traditional conservatives, the payment of taxation is justified as part of the general obligations of citizens to obey the law and support established institutions. The conservative position is encapsulated in perhaps the most famous adage of public finance, "An old tax is a good tax". Conservatives advocate the "fundamental conservative premise that no one should be excused from paying for government, lest they come to believe that government is costless to them with the certain consequence that they will demand more government 'services'." . Social democrats generally favor relatively higher levels of taxation to fund public provision of a wide range of services such as universal health care and education, as well as the provision of a range of welfare benefits. As argued by Tony Crosland and others, the capacity to tax income from capital is a central element of the social democratic case for a mixed economy as against Marxist arguments for comprehensive public ownership of capital. Many libertarians recommend a minimal level of taxation in order to maximize the protection of liberty.

Compulsory taxation of individuals, such as income tax, is often justified on grounds including territorial sovereignty, and the social contract. Defenders of business taxation argue that it is an efficient method of taxing income that ultimately flows to individuals, or that separate taxation of business is justified on the grounds that commercial activity necessarily involves use of publicly established and maintained economic infrastructure, and that businesses are in effect charged for this use. Georgist economists argue that all of the economic rent collected from natural resources (land, mineral extraction, fishing quotas, etc.) is unearned income, and belong to the community rather than any individual. They advocate a high tax (the "Single Tax") on land and other natural resources to return this unearned income to the state, but no other taxes.

Most governments need revenue which exceeds that which can be provided by non-distortionary taxes or through taxes which give a double dividend. Optimal taxation theory is the branch of economics that considers how taxes can be structured to give the least deadweight costs, or to give the best outcomes in terms of social welfare.

Ramsey problem deals with minimising deadweight costs. Because deadweight costs are related to the elasticity of supply and demand for a good, it follows that putting the highest tax rates on the goods for which there is most inelastic supply and demand will result in the least overall deadweight costs.

Some economists have sought to integrate optimal tax theory with the social welfare function, which is the economic expression of the idea that equality is valuable to a greater or lesser extent. If individuals experience diminishing returns from income, then the optimum distribution of income for society involves a progressive income tax. Mirrlees optimal income tax is a detailed theoretical model of the optimum progressive income tax along these lines.

Taxation has also been opposed by communists. Karl Marx assumed that taxation would be unnecessary after the advent of communism and looked forward to the "withering away of the state". In communist economies such as that of China, taxation played a minor role, since most government income was derived from the ownership of enterprises, and it was argued by some that taxation was not necessary. While the morality of taxation is sometimes questioned, most arguments about taxation revolve around the degree and method of taxation and associated government spending, not taxation itself.

If a tax is paid on outsourced services that is not also charged on services performed for oneself, then it may be cheaper to perform the services oneself than to pay someone else — even considering losses in economic efficiency.

For example, suppose jobs A and B are both valued at $1 on the market. And suppose that because of your unique abilities, you can do job A twice over (100% extra output) in the same effort as it would take you to do job B. But job B is the one that you need done right now. Under perfect division of labor, you would do job A and somebody else would do job B. Your unique abilities would always be rewarded.

But now consider your choices when the total marginal tax rate (over all levels of government) is 50%. You are trying to decide whether to do job A twice over or to do job B. First, suppose you do job A twice over, for $2. Your $2 is taxed at 50%, so you end up with $1 which is just enough to pay somebody else to do job B. So there is no reward for doing what you are better at. If your extra output at job A were shy of 100%, then there would actually be a penalty for dividing the labor more efficiently!

Income taxation has the worst effect on division of labor in the form of barter. Suppose that the person doing job B is actually interested in having job A done for him. Now suppose you could amazingly do job A four times over, selling half your work on the market for cash just to pay your tax bill. The other half of the work you do for somebody who does job B twice over but he has to sell off half to pay his tax bill. You're left with one unit of job B, but only if you were 400% as productive doing job A! In this case of 50% tax on barter income, anything less than 400% productivity will cause the division of labor to fail.

In summary, depending on the situation a 50% tax rate can cause the division of labor to fail even where productivity gains of up to 300% would have resulted. Even a mere 30% tax rate can negate the advantage of a 100% productivity gain.

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Source : Wikipedia