US federal debt and interest, in charts
How big is the US national debt, how fast has it grown, and how much does the government pay in interest on it? These pages answer those questions with the U.S. Treasury's own published figures.
Debt figures come from Treasury's daily Debt to the Penny dataset and interest from its Interest Expense on the Debt Outstanding dataset. US fiscal years run from October to September, so FY2026 ended on September 30, 2026.
Guides
US interest on the national debt by year, FY2010 to FY2026
US interest expense on the debt was $1.36 trillion in FY2026, 3.3x FY2010. Year-by-year table, debt at fiscal year-end and interest as a sha
Rankings and charts
How Much Interest Does the US Pay, FY2010 to FY2026?
US interest expense on the debt outstanding went from $414.0B in FY2010 to $1,360B in FY2026 (3.29x).
When Did US Debt Cross $30 Trillion?
US total public debt outstanding crossed $30 trillion in Jan 2022; by October 22, 2026 it stood at $40.44 trillion.