Federal tax revenue in the United States has held within a narrow band of roughly 15% to 20% of GDP every year since the end of World War II, averaging about 17.3% over the past 50 years. Fiscal year 2025 came in near 17%, and the Congressional Budget Office projects 17.5% for 2026, or about $5.6 trillion in dollar terms.1Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036 Add state and local taxes and the total rises to 25.6% of GDP as of 2024, still well below the 34.1% OECD average.2OECD. Revenue Statistics 2025 – the United States
The Postwar Band and Its Sharpest Years
Between 1946 and 2007, the ratio moved between 14.4% and 20.9%. That is a spread of about six percentage points across six decades of very different tax regimes.3Federal Reserve Bank of St. Louis. Federal Receipts as Percent of Gross Domestic Product Within that band, a handful of years stand out.
The postwar high came in 2000, when federal receipts hit 20.3% of GDP. A booming stock market, heavy capital gains realizations, and the late-Clinton surpluses combined to pull the ratio to a level it has not touched since. The 2001 and 2003 tax cuts reduced individual rates and dropped the top rate on dividends and capital gains to 15%, and the dot-com bust and 2001 recession did the rest. By the mid-2000s the ratio was back near 16%.
The modern trough was 2009, at 15.6% of GDP, driven by the financial crisis. Recovery was slow. Congress extended the Bush-era rates through the Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010, and revenue climbed back into the 17% to 18% zone only gradually over the following years.4U.S. Government Publishing Office. Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010
A second high point arrived in 2022, when receipts reached 19.6% of GDP, the strongest reading in two decades. A tight labor market and strong corporate profits coming out of the pandemic pushed collections up sharply. The bump did not last. By 2025 the ratio had drifted back to roughly 17%, right on the long-run average.5U.S. Treasury. Government Revenue
Why the Ratio Stays So Stable
Top marginal income tax rates have swung from 28% to over 90% during the postwar era. Federal receipts, meanwhile, have generally stayed within a few points of 17% to 18% of GDP. That pattern, sometimes called Hauser’s Law after the investor who popularized it in 1993, is less a law than a regularity that keeps demanding explanation.
Several forces pull the ratio back toward its mean. When rates rise, taxpayers shift income into tax-advantaged accounts, defer realizations, or reduce taxable activity. When rates fall, the tax base tends to broaden as economic activity picks up and fewer people bother with sheltering strategies. Congress also intervenes when the ratio drifts, adjusting rates or expanding deductions in response to political pressure that grows on either side of the historical norm.
The stable headline masks real churn underneath. Corporate income tax revenue as a share of GDP has fallen significantly over decades, while payroll tax revenue has grown to fund Social Security and Medicare. The composition of who pays has shifted even as the total percentage looks familiar.
Major Tax Laws That Moved the Ratio
Specific pieces of legislation have reliably pushed year-to-year revenue up or down for several years at a time before the long-run pull reasserts itself.
The Economic Recovery Tax Act of 1981 cut the top individual rate from 70% to 50% and reduced tax liability by roughly 23% over three years. Federal revenue as a share of GDP declined noticeably through the mid-1980s before the Tax Reform Act of 1986 broadened the base and partially offset the drop.6United States Senate Committee on Finance. Summary of the Economic Recovery Tax Act of 1981
The 2001 and 2003 tax cuts reduced individual rates across all brackets and lowered the top rate on capital gains and dividends to 15%. Combined with the 2001 recession, they helped pull federal revenue from above 20% of GDP down to around 16% by 2004.
The Tax Relief Act of 2010 extended those Bush-era cuts for two more years during the recovery from the Great Recession, keeping the ratio lower than a scheduled reversion to higher rates would have produced.4U.S. Government Publishing Office. Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010
The Tax Cuts and Jobs Act of 2017 cut the corporate rate from 35% to 21% and reduced individual rates, with most individual provisions set to expire after 2025. Revenue dropped as a share of GDP in the first two years but climbed back during the post-pandemic surge. CBO estimated that extending all expiring provisions would cost roughly $4 trillion over the following decade.7Congress.gov. Expiring Provisions in the Tax Cuts and Jobs Act (TCJA, P.L. 115-97)
The One Big Beautiful Bill Act of 2025, signed into law on July 4, 2025, significantly affects federal taxes, credits, and deductions, and is expected to shape the revenue outlook for 2026 and beyond.8Internal Revenue Service. One, Big, Beautiful Bill Provisions
Each of these laws bent the revenue curve for a stretch. Economic growth, bracket creep, and subsequent legislation eventually nudged the ratio back toward the postwar average.
What 2026 Is Projected to Bring
CBO projects federal revenue at 17.5% of GDP for fiscal year 2026, roughly $5.6 trillion.1Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036 That figure sits slightly above the 50-year average of 17.3%, reflecting moderate economic growth and recently enacted tax legislation.
Tax expenditures pull hard against that projection. The deductions, credits, and exclusions built into the code represent a massive offset to what the government could theoretically collect. The Joint Committee on Taxation projects federal tax expenditures totaling roughly $2.3 trillion in fiscal year 2026, with the ten largest provisions alone accounting for over $1.4 trillion. The exclusion for employer-provided health insurance, the mortgage interest deduction, and the child tax credit are among the largest. They reduce the tax base before revenue is calculated, which is one reason the U.S. collects a smaller share of GDP than its statutory rates would suggest.
How the Ratio Changes When You Add State and Local Taxes
Federal figures leave out property taxes, state income taxes, sales taxes, and various local levies. When all levels of government are counted using the OECD’s consistent methodology, the U.S. total tax-to-GDP ratio was 25.6% in 2024, about eight points above the federal-only number.2OECD. Revenue Statistics 2025 – the United States
Property taxes make up more than a third of state and local collections. General sales taxes account for another large share, particularly at the state level, with state income taxes and various fees filling in the rest.
One number to watch out for: widely cited World Bank data sometimes shows U.S. tax revenue at around 11% of GDP. That figure covers only the central government and excludes Social Security and Medicare taxes, so it is not comparable to the OECD’s all-government measure.9The World Bank. Tax Revenue (% of GDP) – Glossary
Even at 25.6% of GDP, the United States collects less relative to its economy than most peers. The OECD average reached 34.1% of GDP in 2024, an all-time high for the 38-member group.10OECD. Revenue Statistics 2025 Denmark led at 45.2%, France followed at 43.5%, and Austria at 43.4%. Mexico sat at the bottom at 18.3%.11OECD. Revenue Statistics 2025 – Tax-to-GDP Ratios The single biggest structural reason for the gap is that the U.S. has no federal Value Added Tax. VATs generated an average of 7% of GDP across the OECD in 2022, roughly a fifth of total tax revenue in those countries.12OECD. Consumption Tax Trends 2024 Add 7% of GDP to the U.S. figure and the gap with the OECD average nearly vanishes.