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Which amendment to the Constitution allows the federal income tax?

The 16th Amendment.

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  1. 16th Amendment ✔
  2. 14th Amendment
  3. 18th Amendment

Why: USCIS says paying federal taxes is required by the Constitution through the 16th Amendment. Taxes fund the federal government. The 14th covers citizenship and the 18th was Prohibition.

Huh, didn't know that: The 16th Amendment was ratified in 1913.

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References

Answer: 16th Amendment. USCIS says paying federal taxes is required by the Constitution through the 16th Amendment. Taxes fund the federal government. The 14th covers citizenship and the 18th was Prohibition.

  1. National Archives, 16th Amendment to the U.S. Constitution: Federal Income Tax (1913) www.archives.gov/milestone-documents/16th-amendment
    The Congress shall have the power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States
    Checked 2026-10-09.

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