Did the Supreme Court Rule Income Tax Unconstitutional?

No. The Supreme Court has never ruled the modern federal income tax unconstitutional. It struck down an earlier income tax law in 1895, but the Sixteenth Amendment, ratified in 1913, was written specifically to overturn that decision, and the Court has upheld Congress’s power to tax income in every challenge since. Anyone claiming otherwise is relying on a case that was effectively erased from the books more than a century ago.

The 1895 Case People Point To

Almost every “the income tax is unconstitutional” argument traces back to a misreading of Pollock v. Farmers’ Loan & Trust Co., decided in 1895.1Cornell Law Institute. Pollock v. Farmers Loan and Trust Co. In that case, the Supreme Court struck down an 1894 federal income tax. The ruling held that a tax on income from property — rents, dividends, interest — was a “direct tax,” and the Constitution required direct taxes to be apportioned among the states by population. Because the 1894 law wasn’t apportioned that way, the Court found it invalid.

That is the ruling protestors cite. What they leave out is what happened next.

The Sixteenth Amendment Overruled Pollock

Congress and the states responded to Pollock by amending the Constitution. The Sixteenth Amendment, ratified in 1913, gives Congress the “power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.”2Legal Information Institute. Historical Background of the Sixteenth Amendment Those two phrases — “from whatever source derived” and “without apportionment” — were written to eliminate the exact obstacle Pollock had created.

Congress then passed the Revenue Act of 1913, establishing the modern federal income tax. The Internal Revenue Code that governs your filings today descends directly from that 1913 legislation.

Citing Pollock against the current income tax is like citing a repealed statute against a current one. The rule it announced no longer describes the constitutional landscape.

Brushaber: The Court Confirmed the Tax in 1916

Three years after ratification, a Union Pacific stockholder challenged the new income tax on constitutional grounds. In Brushaber v. Union Pacific Railroad Co. (1916), the Supreme Court unanimously rejected his arguments and upheld the tax.3Legal Information Institute. Brushaber v. Union Pacific Railroad Co.

The Court made a point that still matters. The Sixteenth Amendment did not invent a new taxing power. Congress already had authority to tax income. What the amendment did was remove the apportionment requirement Pollock had grafted onto that power. In the Court’s words, “the whole purpose of the Amendment was to relieve all income taxes when imposed from apportionment from a consideration of the source whence the income was derived.”

That distinction closes off a favorite protestor move: the claim that the Sixteenth Amendment itself was somehow an unconstitutional expansion of federal power. Brushaber answered that in 1916.

Why the Standard Protestor Arguments Keep Losing

Federal courts have heard every variant of the “income tax is illegal” theory and rejected all of them. These are not close questions. The IRS maintains a running list of positions courts have branded frivolous, and raising them tends to produce sanctions rather than victories.4Internal Revenue Service. Anti-Tax Law Evasion Schemes – Law and Arguments

Wages Are Not Income

The claim here is that trading labor for money is an even exchange, so no income results. Every court to consider this has rejected it. One court described the argument as “totally lacking in merit.” The Internal Revenue Code lists “compensation for services” as gross income, and the Supreme Court has held that Congress intended to exercise “the full measure of its taxing power” over that category.

The Sixteenth Amendment Was Never Properly Ratified

Some protestors argue that procedural defects in the 1913 ratification make the amendment invalid. Forty states ratified it — more than the three-fourths required by Article V. The Secretary of State’s certification of ratification is treated as conclusive, and the Supreme Court sustained income tax laws enacted under the amendment in Brushaber three years later.5IRS.gov. The Truth About Frivolous Tax Arguments

The IRS Is Not a Real Government Agency

Another recurring theory holds that the IRS is a private corporation with no legal authority. Federal courts have flatly rejected this, with one ruling declaring the IRS “clearly” a department or agency of the United States. It is established under the Internal Revenue Code, and its Commissioner is appointed to administer and enforce federal tax law.

A Constitutional Belief Is Not a Defense

In Cheek v. United States (1991), the Supreme Court drew a sharp line for criminal cases. Genuinely misunderstanding a technical tax rule can negate the “willfulness” element of a criminal charge. But believing the tax laws are unconstitutional is, as the Court put it, “of a different order.” Someone making that claim is admitting they know what the law requires and have decided to disregard it. That belief provides no defense to prosecution.6Legal Information Institute. Cheek v. United States

What Acting on These Arguments Costs

Because the constitutional question is settled, the system treats refusal to file or pay as evasion, not protest. The penalties stack.

Civil Penalties

Interest runs on unpaid tax and compounds daily from the original due date.11Office of the Law Revision Counsel. 26 USC 6622 – Interest Compounded Daily The failure-to-file penalty is ten times the failure-to-pay penalty for a reason: the IRS treats not filing as the worse offense.

Criminal Exposure

Willful failure to file a return or pay tax owed is a federal misdemeanor punishable by up to one year in prison and a fine of up to $25,000 per offense.12Office of the Law Revision Counsel. 26 USC 7203 – Willful Failure to File Return, Supply Information, or Pay Tax Tax evasion — actively attempting to defeat or evade a tax — is a felony carrying up to five years in federal prison and a fine of up to $100,000.13Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax

The constitutional case for the federal income tax was closed in 1913 and confirmed in 1916. Every argument that has tried to reopen it since has failed. Anyone weighing whether to act on a claim that the tax is illegal is not choosing between two contested legal views; they are choosing between complying with settled law and paying the penalties reserved for people who don’t.