U.S. Federal Tax Rate History

Why we built these charts

Most online resources show U.S. tax rates either as a single static table or as a chart with no annotation. Neither makes it easy to answer the question that actually matters: why did the rate change in a given year? What act of Congress moved it, and what trade-offs did the legislators make?

The three charts above annotate every major tax act on the line, with editorial context for each. The data comes from primary sources (IRS Publication 17 historical tables, IRS Statistics of Income corporate tables, IRS Publication 550 for cap gains), cross-checked against Tax Foundation historical archives and Joint Committee on Taxation legislative summaries.

Things you might not have noticed

• The personal and corporate top rates have rarely moved together. The corporate rate held at 35% from 1993 to 2017, through three presidential administrations and four Congresses, while the personal rate moved through 39.6%, 35%, back to 39.6%, then 37%.
• 1986 was the only year cap gains and ordinary income were taxed identically. Looking at the personal income chart and the cap gains chart side by side, you can see them converge at 28% in 1988, then diverge again in 1997. Eleven years of equal treatment in 113.
• Cap gains and corporate rates moved in similar arcs through the 20th century. Both were low pre-WWII, peaked in the 1950s-1970s, and got cut sharply in the 1980s. The personal income line is the outlier - it stayed high through the entire 1944-1981 window and only began falling with ERTA.
• Today's effective corporate rate is the lowest in 80 years. Combine TCJA's 21% headline with normal deductions and credits, and the effective federal corporate rate for the S&P 500 sits near 18% - lower than any year since 1942.

How headline rates differ from effective rates (and why it matters)

A headline rate is the top marginal rate on the last dollar of income. An effective rate is total tax paid divided by total income. The gap between the two grows with deductions, credits, exemptions, and base-narrowing provisions. In 1944, when the personal top rate hit 94%, only a handful of households had income high enough to reach the top bracket, and even fewer paid the headline rate after deductions - so the effective rate on the top 1% in that era was roughly 42%, less than half the headline. The corporate side tells the same story: TCJA's 21% headline is paired with a 50%-bonus-depreciation regime, R&D tax credits, foreign-derived intangible income deductions, and accelerated cost recovery - all of which pull the effective rate down to about 18% for large public companies.

For analytical purposes, the effective rate is the more honest comparison across eras and across countries. The OECD's effective corporate tax rate for the U.S. ranks below the OECD average post-TCJA, even though the U.S. statutory rate is near the middle. The chart's annotated tax acts highlight the rate-cutting moments, but the deductions and credits added between those moments did just as much work on the bottom line. When you see a politician quote a headline rate, the next question is always: against what base?

Indexing, sunset clauses, and why TCJA's 2025 cliff mattered

Most TCJA individual provisions (the 7-bracket structure, the doubled standard deduction, the $10K SALT cap, the 20% qualified business income deduction) were scheduled to sunset on December 31, 2025. Without action, 2026 would have reverted to pre-TCJA brackets (10%, 15%, 25%, 28%, 33%, 35%, 39.6%) with a $6,500/13,000 standard deduction, full SALT deductibility, no QBI, restored personal exemptions, and AMT exposure for far more households. The extension bill passed in late 2025 moved that cliff out, but several scheduled future cuts (NII surtax, certain depreciation rules, GILTI base rates) remain in flux year by year. For long-horizon financial modeling, "what tax rate will apply in year X" is rarely a settled question.

The corporate 21% rate, by contrast, was made permanent by TCJA. The 15% corporate AMT and 1% stock buyback excise tax added in the 2022 Inflation Reduction Act layer on top of that 21%, applicable to companies with $1B+ in book income. Capital gains rates have not been formally sunset since 2013's ATRA, when the 20% top rate plus the 3.8% NII surtax brought the effective top rate to 23.8% - that combination has held for 13 consecutive years. Stability there is the exception, not the rule, across the full 113-year window.

What's not on these charts (and why)

These three charts show top marginal rates only. They don't show estate and gift tax rates (which have moved through a wider range - 77% in the 1940s, abolished briefly in 2010, currently 40% with a $13.99M exemption for 2025), payroll taxes (FICA, FUTA, the 0.9% additional Medicare tax for high earners), state and local income tax (which adds 0-13.3% on top of federal), or AMT (which is a parallel calculation with its own bracket structure). For payroll tax history, see the Social Security wage base chart; for state-level top rates, see the state tax comparison. The IRMAA Medicare-surcharge chart on the IRMAA history page tracks a tax-adjacent surcharge that increasingly hits high earners in retirement.

We also don't currently chart the federal excise taxes (gasoline, tobacco, alcohol, air travel) - they account for a meaningful share of federal revenue but operate on a different schedule and aren't moved by the major tax acts that drive the lines you see here. The charts are also U.S.-only; for cross-country comparisons, the OECD Tax Database is the best source. When you see "the U.S. is a high-tax country" or "the U.S. is a low-tax country," the answer depends almost entirely on which of these eight or nine tax categories the speaker is referencing.