Income tax

• 1. Ancient Origins And Early Experiments

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  In 9 CE, Emperor Wang Mang of the Xin dynasty issued a decree that changed how people in his empire handled their earnings. He established an income tax on net profits from activities like wild herb collection, fishing, and shepherding. The rate was set at 10% for these nonagricultural pursuits. Officials required citizens to report their taxes directly to the government. Auditors checked these reports to ensure accuracy. Anyone caught evading this tax faced severe consequences including one year of hard labor and total confiscation of property. This early experiment caused such popular discontent that the tax was abolished just thirteen years later in 22 CE.

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• 2. The Modern British Invention

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  Prime Minister William Pitt the Younger introduced a progressive income tax into Great Britain during his budget of December 1798. Henry Beeke, who would become Dean of Bristol, suggested the idea to fund weapons for the French Revolutionary War. The new graduated tax started at 2 old pence per pound on incomes exceeding £60. It climbed to a maximum of 10% on incomes over £200. Pitt hoped the levy would generate £10 million annually but actual receipts for 1799 totaled only slightly more than £6 million. The tax ran from 1799 until 1802 when it was abolished by Henry Addington during the Peace of Amiens. Hostilities with France resumed in 1803 so Addington reintroduced the measure. It was finally repealed in 1816 after the Battle of Waterloo. Opponents demanded all records be destroyed and copies were publicly burned by the Chancellor of the Exchequer before being secretly retained in the basement of the tax court.

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• 3. American Constitutional Battles

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  The US federal government imposed its first personal income tax on the 5th of August 1861 to help pay for the American Civil War. This initial rate was 3% on all incomes over $800. A Revenue Act replaced this tax in 1862 to broaden the scope of collection. The first peacetime income tax did not arrive until 1894 through the Wilson-Gorman tariff. That law set a flat 2% rate on income above $4000 which meant fewer than 10% of households paid anything. The US Supreme Court ruled this tax unconstitutional because the Tenth Amendment forbade powers not expressed in the Constitution. Congress could only impose direct taxes if apportioned among states. In 1913 the Sixteenth Amendment cleared this constitutional obstacle allowing implementation of a federal income tax. By fiscal year 1918 annual internal revenue collections passed the billion-dollar mark for the first time reaching $5.4 billion by 1920. Rates varied dramatically from 1% for the lowest bracket during early days to over 90% for the highest bracket during World War II.

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• 4. Global Systems And Jurisdictional Rules

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  Countries generally use one of two systems: territorial or residential taxation models. In the territorial system only local income from sources inside the country is taxed. The residential system taxes residents on their worldwide income including both local and foreign earnings. Non-residents are taxed only on specific types of income earned within that jurisdiction. A handful of places like Singapore and Hong Kong tax residents only on income earned locally or remitted there. Some nations such as France apply a residential system for individuals but a territorial system for corporations. Brunei taxes corporate entities while exempting personal income entirely. Double taxation occurs when a taxpayer pays tax in their resident jurisdiction and also to another country where they are non-resident. Most jurisdictions allow deductions or credits for taxes already paid to other countries on foreign income. Many countries sign treaties to eliminate or reduce double taxation through these agreements.

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• 5. Economic Theory And Labor Supply

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  Multiple conflicting theories exist regarding how income taxes affect labor supply and economic activity. Some studies suggest an income tax does not significantly change the number of hours worked by employees. Other research found large price elasticity due to reductions in labor force participation rates and human capital investment. Higher costs imposed on labor and capital cause deadweight loss in an economy. This represents lost economic activity from people deciding not to invest capital or use time productively because of the tax burden. There is also a loss from individuals and professional advisors devoting time to tax-avoiding behavior instead of economically productive activities. The proportion of people who pay their income taxes fully, on time, and voluntarily varies widely across nations. Voluntary compliance rates are higher in the US than in countries like Germany or Italy. In countries with sizeable black markets voluntary compliance becomes very low and difficult to calculate accurately.

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• 6. Avoidance Strategies And Bracket Creep

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  Tax avoidance strategies and loopholes emerge within income tax codes when taxpayers find legal methods to avoid paying taxes. Lawmakers attempt to close these loopholes with additional legislation creating a cycle of ever more complex rules. This vicious cycle tends to benefit large corporations and wealthy individuals who can afford sophisticated tax planning fees. Bracket creep describes the process where inflation pushes wages into higher tax brackets leading to fiscal drag. Even if there is only one tax bracket or someone remains within the same bracket, they still face bracket creep resulting in a higher proportion of income paid in tax. Most progressive tax systems are not adjusted for inflation so nominal wage increases become more highly taxed despite no real value increase. The net effect is that taxes rise in real terms unless rates or brackets are adjusted to compensate. Transparency regarding personal income tax filings occurs in Finland Norway and Sweden as of the late 2000s and early 2010s. Sweden has published this information annually since 1905 in its directory Taxeringskalendern.

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