
The Internal Revenue Service (IRS) is the revenue service for the United States federal government, responsible for collecting federal taxes and administering the Internal Revenue Code. The IRS was created based on the Treasury Secretary's authority to administer and enforce internal revenue laws. The IRS was established in 1913 following the ratification of the Sixteenth Amendment to the U.S. Constitution, which authorized Congress to impose a tax on income.
| Characteristics | Values |
|---|---|
| Year of creation | 1913 |
| Amendment | The Sixteenth Amendment to the U.S. Constitution |
| Previous name | Bureau of Internal Revenue |
| Year of name change | 1953 |
| Type of organization | A body established by "positive law" |
| Parent organization | Department of the Treasury |
| Leader | Commissioner of Internal Revenue |
| Leader's term | 5 years |
| Leader's appointment | By the President of the United States |
| Mission | Provide America's taxpayers with top-quality service by helping them understand and meet their tax responsibilities |
| Enforce the law with integrity and fairness to all |
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What You'll Learn

The Revenue Act of 1918
In 1918, approximately 5% of the population paid federal income taxes, an increase from 1% in 1913. The income tax funded one-third of the cost of World War I. The Revenue Act of 1918 raised even greater sums for the World War I effort. It codified all existing tax laws and imposed a progressive income-tax rate structure of up to 77%.
The Internal Revenue Service (IRS) is the revenue service for the United States federal government, responsible for collecting federal taxes and administering the Internal Revenue Code, the main body of federal statutory tax law. The IRS originates from the Commissioner of Internal Revenue, a federal office created in 1862 to assess the nation's first income tax to fund the American Civil War. In 1913, the Sixteenth Amendment to the U.S. Constitution was ratified, authorizing Congress to impose a tax on income and leading to the creation of the Bureau of Internal Revenue. In 1953, the agency was renamed the Internal Revenue Service.
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The Volstead Act, 1919
The Internal Revenue Service (IRS) was created following the ratification of the Sixteenth Amendment in 1913, which authorised Congress to impose a tax on income. However, the origins of the IRS can be traced back to 1862, when President Lincoln signed into law a revenue-raising measure to fund the Civil War, creating the role of Commissioner of Internal Revenue and the nation's first income tax.
In 1919, Congress passed the Volstead Act, also known as the National Prohibition Act, to enforce the Eighteenth Amendment, which prohibited the manufacture, sale, and transport of intoxicating beverages. The Act was named after Andrew Volstead, chairman of the House Judiciary Committee, who managed the legislation.
The Volstead Act was designed to promote the alignment of federal and state legislation in regulating alcohol. It consisted of three main sections:
- Previously enacted War Prohibition, which prohibited the use of grain in the production of spirits to conserve grain supplies during World War I.
- Prohibition as outlined by the Eighteenth Amendment, which banned "intoxicating liquors" without providing a definition. The Volstead Act defined an intoxicating beverage as containing more than 0.5% alcohol.
- Industrial alcohol use, which allowed for the use of alcohol for medical and industrial purposes. Physicians could prescribe up to one pint of spirits every ten days, while religious leaders could obtain permits for sacramental use.
The passage of the Volstead Act was influenced by the work of temperance societies, such as the Women's Christian Temperance Union and the Anti-Saloon League, which had been advocating for abstinence from alcohol and drugs for nearly a century. The Anti-Saloon League, in particular, played a significant role by exploiting the aftermath of World War I to push for national prohibition, arguing that grain was needed to feed the allied nations rather than produce whiskey.
The Act faced challenges in enforcement, with citizens finding creative ways to evade Prohibition agents and local authorities refusing to commit resources to its implementation. This led to a rise in organised crime and violence, as criminal gangs took over the production, importation, and distribution of alcoholic beverages. By 1932, polls showed that most Americans believed that Prohibition had failed, and it was eventually repealed in 1933, with the IRS resuming its responsibility for alcohol taxation.
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The Revenue Act of 1942
Prior to the Act, in 1939, about four million Americans paid income tax. This number increased to over 42 million by 1945. The Revenue Act of 1942 increased individual income tax rates and corporate tax rates, with the top corporate rate rising from 31% to 40%. The personal exemption amount was reduced from $1,500 to $1,200 for married couples, and the exemption amount for each dependent was lowered from $400 to $350. A 5% Victory tax was imposed on all individual incomes exceeding $624, with postwar credit. Additionally, the Act replaced the 35-60% graduated rate schedule for excess profits tax with a flat 90% rate.
One of the significant features of the Revenue Act of 1942 was its introduction of deductions. It allowed deductions for medical expenses, and Section 121 of the Act enabled deductions for expenses incurred in investment activities, even if they were not connected to a trade or business. These deductions provided tax relief and encouraged economic activity by reducing the tax burden on individuals and businesses.
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The Tax Reform Act, 1986
The Tax Reform Act of 1986 was a law passed by the United States Congress to simplify the income tax code. It was signed into law by Republican President Ronald Reagan on October 22, 1986, and was sponsored in Congress by two leading Democrats, Representative Richard Gephardt of Missouri and Senator Bill Bradley of New Jersey. It was the most significant piece of tax legislation in 30 years, containing 300 provisions, and it took three years to implement.
The purpose of the Tax Reform Act of 1986 was to simplify the tax code, broaden the tax base, and eliminate many tax shelters and preferences. It was intended to be essentially revenue-neutral, though it did shift some of the tax burden from individuals to businesses. The Act lowered the top tax rate for individuals from 50 to 28 percent and raised the bottom rate from 11 to 15 percent. It also ended tax code provisions that allowed individuals to deduct interest on consumer loans. However, it increased personal exemptions and standard deduction amounts and indexed them to inflation. The Act also strengthened the “alternative minimum tax” provisions of the income tax code for individuals.
The Tax Reform Act of 1986 also had a significant impact on businesses, reducing the corporate tax rate from 50 to 35 percent. It also reduced the allowances for certain business expenses, such as business meals, travel, and entertainment, and restricted deductions for certain other expenses. The Act also included provisions related to employee stock ownership plans, welfare benefit plans, and farm finance leases. It also made changes to the tax credit for the qualified clinical testing of certain drugs and the production of fuels from nonconventional sources.
After the passage of the Tax Reform Act of 1986, tax code revision became a much more frequent event, resulting in the return of many tax breaks and an increase in the number of tax brackets.
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The Tax Cuts and Jobs Act, 2017
On December 20, 2017, the Tax Cuts and Jobs Act (TCJA) was passed by the House and signed into law by President Trump on December 22, 2017. The Act has been described as simplifying the tax code, lowering corporate debt, and cutting taxes for most taxpayers. However, it is also associated with a projected decrease in federal tax revenue and concerns about its impact on economic activity and social welfare.
The TCJA has several key provisions. Firstly, it allows a tax credit for employers who provide paid family and medical leave to their employees. Secondly, it increases the standard deduction, leading to more individuals opting for the standard deduction instead of itemizing their tax deductions. This change may result in fewer charitable contributions to churches and other nonprofit organizations as individuals may not see tax savings from donations. Additionally, the indexed estate tax exemption has been doubled, potentially reducing the need for charitable contributions in wills to minimize estate taxes.
The effects of the TCJA on the economy and taxpayers have been mixed. According to a 2017 report by the Tax Policy Center, the Act was expected to lower taxes by an average of $1,600 in 2018 and 2025. However, the report also projected that the top 20% of Americans by income would receive about 65% of the tax savings, while the bottom 80% of taxpayers would only receive 35% of the benefit in 2018 and incur costs in 2019 and beyond. Bloomberg reported that in the two years after the Act's enactment, the top six American banks saved over $32 billion in taxes, but they also reduced lending, cut jobs, and increased distributions to shareholders.
The TCJA has also been criticized for benefiting the wealthy at the expense of the middle class. While it was touted as a tax cut for the middle class, evidence suggests that stagnating incomes, opportunity gaps, and fragile families continue to be issues for this demographic. The Act has also contributed to an increase in the federal budget deficit. By 2027, the benefits of the tax law are projected to flow entirely to the rich.
Overall, the Tax Cuts and Jobs Act of 2017 has had complex consequences for the economy, taxpayers, and social welfare. While it simplified the tax code and cut taxes for some, it also contributed to a growing federal budget deficit and raised concerns about fairness in tax savings and benefits.
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Frequently asked questions
The IRS was created based on the Treasury secretary's authority to administer and enforce the internal revenue laws. It was established by "positive law" as it was created through a congressionally mandated power.
The law that created the IRS was intended to raise revenue to fund the American Civil War. It created the nation's first income tax, with a 3% tax on incomes between $600 and $10,000, and a 5% tax on incomes over $10,000.
The law that created the IRS was passed in 1862 by President Lincoln. It was a temporary measure that funded over a fifth of the Union's war expenses and expired a decade later.







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