National Debt by President: The Timeline
How much did the national debt change during each presidency? The figures below come from the U.S. Treasury's historical debt records, measured from each inauguration to the September after the president left office. These are nominal dollars, not adjusted for inflation.
Debt added in trillions of dollars, by administration. Source: U.S. Treasury historical debt outstanding.
| President | Years | Debt at Start | Debt at End | Added | Change |
|---|---|---|---|---|---|
| Ronald Reagan | 1981-1989 | $0.99T | $2.86T | $1.86T | +186% |
| George H. W. Bush | 1989-1993 | $2.86T | $4.41T | $1.55T | +54% |
| Bill Clinton | 1993-2001 | $4.41T | $5.81T | $1.40T | +32% |
| George W. Bush | 2001-2009 | $5.81T | $11.91T | $6.10T | +105% |
| Barack Obama | 2009-2017 | $11.91T | $20.24T | $8.34T | +70% |
| Donald Trump (1st term) | 2017-2021 | $20.24T | $28.43T | $8.18T | +40% |
| Joe Biden | 2021-2025 | $28.43T | $35.46T | $7.04T | +25% |
| Donald Trump (2nd term) | 2025-present | $35.46T | $37.64T* | $2.17T* | +6%* |
*Second term figures are through September 2025 and will change. All figures are total public debt outstanding, nominal dollars, from Treasury records.
Important context
Presidents do not control the debt alone. Congress writes the spending bills and tax laws. Economic conditions matter enormously: recessions shrink tax revenue and trigger automatic spending on unemployment and safety net programs, while wars and pandemics drive emergency outlays. The figures above describe what happened during each administration, not who caused it.
Dollar figures also grow over time because the economy and the price level grow. A $1 trillion increase in 1985 was a far larger share of the economy than a $1 trillion increase in 2025. The debt-to-GDP ratio adjusts for this.
The pattern
Every president since Calvin Coolidge has left office with more nominal debt than when they arrived, with one partial exception: Bill Clinton's second term produced annual budget surpluses, though total debt still edged up because of intragovernmental borrowing. The debt has grown under both parties, in good economies and bad.
Keep learning
- Debt-to-GDP ratio tracker
- Watch the live debt clock
- What is the federal deficit?
- Get the Ledger Brief every Wednesday
Sources: U.S. Treasury Fiscal Data, Historical Debt Outstanding dataset (fiscaldata.treasury.gov). Figures measured at inauguration and the following September 30, nominal dollars. Second-term current figures through September 2025.