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Taxes imposed by the British Parliament were one of the triggers that set off the American colonies’ fight for independence, acknowledged by the slogan, “No taxation without representation!” The first draft of the new nation’s Constitution declared that citizens should not be subject to direct taxation.
However, that changed and the first income tax in the U.S. was levied to pay for the Civil War and provided a snapshot of the revenue that income taxes could raise. The 16th Amendment gave Congress the power to lay and collect federal taxes. It was passed in 1909 and ratified in 1913.
Key Takeaways
- The opposition to taxation helped fuel the American Revolution.
- The first income tax paid for the Civil War.
- The 16th Amendment was ratified on Feb.3, 1913, and started the formal collection of income taxes in the United States.
Drafting the 16th Amendment
Following the Civil War, the tax was repealed, but a new income tax was introduced in 1894 to recover lost revenues from reductions in U.S. tariffs. Arguments against the taxation were brought before the Supreme Court, and the tax was declared unconstitutional in Pollock v. Farmers’ Loan and Trust Co.
To counteract the defeat, the U.S. government drafted the 16th Amendment that states, “The Congress shall have the power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and regard to any census or enumeration.”
The amendment was ratified on Feb. 3, 1913, clearing the legal hurdles to taxation, and an income tax was levied that year.
Since the 16th Amendment was ratified in 1913, the United States has consistently collected income taxes.
Marginal Tax Rates
The United States uses a progressive income tax method to collect federal income tax where the marginal tax rate increases as income increases. For tax years 2024 and 2025, taxpayers are subject to the following rates based on their income:
| Marginal Tax Rates for Tax Years 2024 and 2025 | ||||
|---|---|---|---|---|
| 2024 Single Individuals | 2024 Married Couples Filing Jointly | 2025 Single Individuals | 2025 Married Couples Filing Jointly | |
| 37% | Over $609,350 | Over $731,200 | Over $626,350 | Over $751,600 |
| 35% | Over $243,725 | Over $487,450 | Over $250,525 | Over $501,050 |
| 32% | Over $191,950 | Over $383,900 | Over $197,300 | Over $394,600 |
| 24% | Over $100,525 | Over $201,050 | Over $103,350 | Over $206,700 |
| 22% | Over $47,150 | Over $94,300 | Over $48,475 | Over $96,950 |
| 12% | Over $11,600 | Over $23,200 | Over $11,925 | Over $23,850 |
| 10% | Less than $11,600 | Less than $23,200 | Less than $11,925 | Less than $23,850 |
Critics of Taxation
Many critics protest the constitutional legality of tax payments and the substantial legal penalties that can come from not paying. Some refuse to pay income tax, claiming the tax is unconstitutional and illegal. The IRS has produced a publication, The Truth About Frivolous Tax Arguments, which argues some of the most common points tax protestors use:
- Taxation is slavery and violates the 13th Amendment. Courts have repeatedly ruled that this is not the case.
- Filing a tax return is optional. This argument is based on the word “voluntary” in the Form 1040 instructions, which some tax protestors take to mean that filing the return is optional. This word refers to the fact that U.S. taxpayers must file their returns rather than having the government do so for them.
- Taxation is an unlawful seizure of property and thus violates the 5th Amendment. The Constitution grants the government the right to levy a tax, upheld by Phillips v. Commissioner and Brushaber v. Union Pac RR.
Who Administers the Tax Laws in the United States?
The Internal Revenue Service administers the tax laws in the United States. According to Title 26 of the IRS Code, individuals who receive taxable income as defined in Section 61, Gross Income Defined, of the IRS Code must pay income tax.
What Is Included in Gross Income?
An individual’s gross income includes all income received which includes money, goods, property, and services subject to taxation.
What Services Do Income Taxes Fund?
Income tax in the United States is collected to support programs such as Social Security, Medicare, defense spending, veteran benefits, and public education.
The Bottom Line
Opposition to taxation was a cornerstone argument for the early Americans who opposed British rule. However, wartime spending during the Civil War propelled the use of the income tax. The 16th Amendment, ratified on Feb. 3, 1913, started the formal collection of income taxes in the United States.