The federal income tax began in 1861 as a temporary war tax

The United States first introduced a federal income tax in 1861 to fund the Civil War. This was not a permanent system—Congress designed it as a temporary measure that would end when the war ended. The tax applied only to people earning above a certain threshold, so most workers did not pay it. After the war ended in 1865, the income tax continued for a few more years before Congress let it expire in 1872.

For the next 16 years, the federal government had no income tax at all. Instead, it relied on tariffs (taxes on imported goods) and excise taxes on specific items like alcohol and tobacco. This changed in 1894, when Congress tried to bring back an income tax during an economic depression. That version lasted only two years before the Supreme Court struck it down in 1895, ruling that the Constitution did not allow a direct income tax without apportioning it among the states in a specific way.

Key Takeaways

  • The first federal income tax appeared in 1861 as a temporary Civil War measure and expired in 1872.
  • Congress attempted to revive income tax in 1894, but the Supreme Court ruled it unconstitutional in 1895.
  • The 16th Amendment, ratified in 1913, gave Congress the permanent legal power to collect income tax without apportioning it among states.
  • The modern income tax system began in 1913 and has been in place ever since, though rates and rules have changed many times.

How the 16th Amendment made income tax permanent

After the Supreme Court blocked the 1894 income tax, Congress knew it needed to change the Constitution itself to collect income tax legally. In 1909, Congress proposed the 16th Amendment, which stated straightforward that "Congress shall have power to collect taxes on incomes, from whatever source derived, without apportioning among the several States." This amendment did not create the income tax—it only gave Congress the power to create one.

The states ratified the 16th Amendment on February 3, 1913. Just nine months later, Congress passed the first permanent income tax under the new amendment. The tax took effect on March 1, 1913, and has remained part of the federal tax system ever since. That 1913 tax was much smaller than today's system—it applied only to people earning more than $3,000 per year, which was a very high income at the time.

Who paid the original income tax in 1913

The 1913 income tax was a tax on the wealthy, not the working class. The threshold of $3,000 per year meant that only about 3 percent of the population owed federal income tax. A factory worker or clerk earning $500 to $1,000 per year paid nothing. The tax started at 1 percent on income above $3,000 and rose to a maximum of 7 percent on the highest earners.

This changed dramatically during World War I. As the war effort required more money, Congress lowered the income threshold and raised the tax rates. By 1918, the top rate had jumped to 77 percent. After the war, rates came down somewhat, but income tax had become a mass tax affecting millions of workers, not just the wealthy. The system has continued to expand and contract based on government spending needs and political decisions ever since.

Why the government needed income tax

Before 1913, the federal government funded itself mainly through tariffs on imported goods. Tariffs were unpopular because they raised prices for consumers, but they did not require the government to track individual income. Income tax was more direct—it took a percentage of what people earned—but it also required the government to create a system for collecting it.

The shift to income tax happened because tariffs alone could not raise enough money for the growing costs of government, especially during wars. Income tax could reach more people and raise larger amounts of money more reliably. Once the system was in place and the 16th Amendment removed the legal barrier, income tax became the federal government's primary source of revenue. Today, income tax brings in far more money than any other federal tax.

How income tax has changed since 1913

The income tax system that started in 1913 looked very different from today's system. There were no withholding requirements—workers did not have taxes taken from their paychecks. Instead, people calculated what they owed and paid it once a year. The tax forms were straightforward compared to modern ones, and most people did not need to file at all because they earned below the threshold.

Withholding—the system where employers take taxes out of each paycheck—did not begin until 1943, during World War II. This change made it easier for the government to collect money throughout the year rather than waiting for annual payments. Tax rates, deductions, and the income threshold have changed hundreds of times since 1913, responding to wars, recessions, and shifts in political priorities. The basic structure, however—a tax on individual income collected by the federal government—has remained the same for over 110 years.

The difference between the 1861 income tax and the 1913 one

The 1861 income tax and the 1913 income tax were legally different in one crucial way: the 1861 version was always understood to be temporary and did not require a constitutional amendment. Congress could create it and end it as part of its normal taxing power. The 1913 income tax, by contrast, required the 16th Amendment because the Supreme Court had ruled that a permanent income tax needed explicit constitutional authority.

The 1861 tax also applied to a much smaller portion of the population—mainly wealthy merchants and professionals—while the 1913 tax, though still limited to the wealthy at first, was designed as a permanent system that could expand. The 1861 tax was also much simpler, with fewer deductions and lower rates. When the 1861 tax expired in 1872, the government straightforward stopped collecting it. The 1913 tax, by contrast, became the foundation of the modern federal tax system and has never been repealed.

Frequently Asked Questions

Did everyone have to pay income tax when it started in 1913?

No. The 1913 income tax only applied to people earning more than $3,000 per year, which was roughly the top 3 percent of earners. Most workers earned far less and owed no federal income tax. The threshold has changed many times since then, and today millions of workers at all income levels pay federal income tax.

Why did the Supreme Court block the 1894 income tax?

The Supreme Court ruled in 1895 that a direct income tax was unconstitutional without being apportioned among the states based on population. This technical requirement made an income tax impractical. The 16th Amendment removed this barrier by giving Congress explicit power to collect income tax without apportioning it.

Was income tax always withheld from paychecks?

No. Withholding—where employers take taxes out of each paycheck—did not begin until 1943. Before that, workers calculated their own taxes and paid once a year. Withholding was introduced during World War II to make it easier for the government to collect money throughout the year.

Could Congress eliminate the income tax today?

Congress could pass a law eliminating the federal income tax, but it would need to replace that revenue with other taxes or reduce spending. The 16th Amendment gives Congress the power to collect income tax, but it does not require Congress to use that power. Eliminating income tax would be a major political decision affecting how the government funds itself.