How Does the U.S. Tax System Stack Up?

Key Takeaways

• US tax revenue 25.5% of GDP, 10 points below OECD.
• Federal taxes only two‑thirds of total government revenue.
• Compliance costs equal ~1.8% of GDP for households/businesses.
• Tax gap around 13% of obligations, rising with IRS cuts.
• Low tax burden limits infrastructure and social program funding.

Summary

The United States collects general‑government tax revenue equal to about 25.5% of GDP, roughly ten percentage points below the OECD average. Only two‑thirds of that revenue comes from the federal level, a share far lower than other industrial federations. Compliance costs for households and businesses amount to roughly 1.8% of GDP, and the IRS estimates a tax gap of about 13% of obligations, which has widened as enforcement resources shrink. While low tax rates are credited with supporting economic dynamism, they also constrain funding for infrastructure and social programs.

Pulse Analysis

The United States’ tax structure stands out among OECD peers for its relatively low overall burden. At just over a quarter of GDP, U.S. tax receipts lag the alliance’s average by nearly ten points, reflecting both a modest federal share and a reliance on income taxes rather than consumption levies. This fiscal profile influences the nation’s ability to fund public services, as state and local governments must shoulder a larger portion of the tax pie, often with limited capacity.

Complexity compounds the revenue challenge. Households and businesses face compliance costs estimated at 1.8% of GDP, a figure that rivals the tax wedge in many high‑tax countries. The IRS reports a persistent tax gap of roughly 13%, driven largely by misreported business income and a shrinking enforcement workforce. Funding cuts to the agency have reduced audit rates, allowing the gap to widen despite ongoing debates about simplifying the code.

Policymakers grapple with a trade‑off between maintaining a competitive, low‑tax environment and securing the fiscal resources needed for infrastructure, education, and social safety nets. Proponents of the current system argue that modest rates spur investment and labor participation, yet the heavy reliance on income taxation can dampen both capital formation and workforce incentives. A balanced reform agenda may need to broaden the tax base, streamline compliance, and consider modest shifts toward consumption‑based taxes to sustain long‑term growth while preserving the United States’ economic dynamism.