Where Your Tax Dollars Go

How to read this diagram

Each band is a money flow, sized in proportion to dollars. The left side shows where federal money comes from — individual income taxes, payroll taxes, corporate taxes, other receipts, and borrowing. The right side shows where it goes. Because Washington spent about $1.83 trillion more than it collected in FY2024, borrowing is itself one of the largest "revenue" streams.

Key takeaways from FY2024

• Individual income taxes are the single biggest funding source (~$2.43T, about half of all revenue).
• Social Security ($1.46T) is the largest single spending category, followed by health programs.
• Net interest on the debt (~$881B) now costs more than national defense (~$874B).
• Social Security, Medicare, Medicaid/health, and interest together consume roughly 60% of all federal spending — largely on autopilot, set by law rather than annual votes.

What counts as "mandatory" vs "discretionary"?

Most of the budget is mandatory spending — programs like Social Security and Medicare that pay out automatically under existing law. Only about a quarter of spending is discretionary, meaning Congress votes on it each year; defense is the largest discretionary item. Net interest is neither — it's simply the cost of servicing past deficits.