The federal income tax began in 1861 as a temporary Civil War measure

The United States first imposed a federal income tax in 1861 to fund the Civil War. Congress passed it as a temporary measure, taxing incomes above $800 per year at rates between 3 and 5 percent. The tax was meant to expire when the war ended, and it did — Congress repealed it in 1872, thirteen years after the war's conclusion.

Before 1861, the federal government had no income tax at all. It funded itself through tariffs on imported goods, excise taxes on specific items like alcohol and tobacco, and land sales. An income tax was considered radical and unconstitutional by many people at the time, but the enormous cost of the Civil War made it necessary.

The 1861 tax was the first time the federal government directly taxed what people earned. It applied only to the wealthy — the $800 threshold meant that most working Americans paid nothing. The tax was unpopular, especially in the South, but it raised significant revenue during the war years.

Key Takeaways

  • The federal income tax started in 1861 as a temporary war tax to fund the Civil War, not as a permanent system.
  • The original 1861 tax only applied to people earning more than $800 per year, which excluded most of the population.
  • Congress repealed the income tax in 1872 after the Civil War ended, leaving the country without a federal income tax for 17 years.
  • The federal government funded itself before 1861 primarily through tariffs on imported goods and excise taxes on specific products.

Income tax disappeared for 17 years after the Civil War

Once the Civil War ended in 1865, the income tax became unpopular again. Congress allowed it to expire in 1872, and the country had no federal income tax for the next 17 years. The government returned to relying on tariffs and excise taxes to fund its operations.

During this period, the federal government was much smaller than it is today. There was no Social Security, no Medicare, no interstate highway system, and no large military establishment in peacetime. The tariff on imported goods was the main source of federal revenue, and it was high enough to fund the government's limited activities.

The income tax returned permanently in 1913

The federal income tax came back in 1913, this time as a permanent part of the tax system. Congress passed it after the 16th Amendment to the Constitution was ratified in February 1913, which gave Congress the power to tax income without apportioning it among the states.

The 1913 income tax was also designed to hit only the wealthy. The first tax rate was 1 percent on incomes above $3,000 per year — a threshold that excluded about 95 percent of American workers. The highest earners paid a top rate of 7 percent.

Unlike the Civil War tax, this income tax was meant to be permanent. It has remained part of the federal tax system ever since, though the rates, thresholds, and rules have changed many times.

Why the 16th Amendment was necessary

The Supreme Court had ruled in 1895 that a federal income tax was unconstitutional without an amendment to the Constitution. That ruling came after Congress tried to impose an income tax in 1894 to help pay for the Spanish-American War. The Court said that an income tax was a "direct tax" and had to be apportioned among the states based on population, which made it impractical.

To get around this ruling, Congress proposed the 16th Amendment in 1909. It stated straightforward: "The Congress shall have power to collect taxes on incomes, from whatever source derived, without apportionment among the several States." The amendment was ratified by the states in 1913, clearing the way for a permanent income tax.

How the income tax expanded over time

The income tax that started in 1913 was small and affected only the rich. But as the United States entered World War I in 1917, Congress raised rates sharply to pay for the war effort. By 1918, the top rate had climbed to 77 percent on the highest incomes.

After World War I ended, rates came down somewhat, but they never returned to the 1913 levels. During the Great Depression and World War II, the income tax expanded to cover the middle class for the first time. By the 1940s, millions of ordinary workers were paying federal income tax, and the system had become the government's largest source of revenue.

The income tax system that exists today — with millions of filers, withholding from paychecks, and complex rules — grew out of the needs of World War II. The government needed to collect money quickly and efficiently, so it introduced payroll withholding in 1943. That system is still in place.

State income taxes developed separately from federal tax

While the federal government was debating income tax, some states had already started taxing income. Wisconsin passed the first state income tax in 1911, two years before the federal tax returned. Other states followed, but not all — some states still have no income tax today.

State income taxes developed on their own timeline and are separate from the federal system. A person may owe federal income tax, state income tax, or both, depending on where they live and work. Some states tax only wage income, while others tax investment income as well.

Frequently Asked Questions

Did the United States have any federal taxes before the income tax?

Yes. The federal government funded itself through tariffs on imported goods, excise taxes on items like alcohol and tobacco, and revenue from land sales. Tariffs were the largest source of federal revenue before 1861.

Why did the Supreme Court rule the 1894 income tax unconstitutional?

The Court said income tax was a "direct tax" that had to be apportioned among states based on population, which was impractical. The 16th Amendment, ratified in 1913, gave Congress the power to tax income without this requirement.

When did income tax start affecting ordinary workers, not just the wealthy?

During World War II, in the 1940s, the income tax expanded to cover the middle class for the first time. The government introduced payroll withholding in 1943 to collect taxes efficiently from millions of workers.

Do all states have an income tax?

No. Some states have no income tax at all, while others tax only wages or only investment income. State income taxes developed separately from the federal system and vary widely by state.