Debt Interest Scenario
See how refinancing and a rate change affect an annual interest run rate.
Change the assumptions
The debt stock comes from the latest Treasury snapshot. The 20% refinancing share and +100 basis-point rate change are illustrative assumptions.
Annual interest run-rate change: +$63.67 billion.
Method and limits
Annual change = debt × refinancing share ÷ 100 × rate change ÷ 10,000. A positive result is higher annual expense; a negative result is lower expense.
This is the annual run rate once the selected share has repriced. It does not model when refinancing happens during a year, future borrowing, maturity buckets, tax receipts, or the deficit. The refinancing share is a user assumption, not a measured maturity schedule.
Initial debt observation: 2026-09-30. Snapshot retrieved 2026-10-13. U.S. Treasury, Fiscal Data: Monthly Statement of the Public Debt, Table 1.