What this measures
Interest cost depends on how much is owed and on the rates the Treasury pays as old securities mature and are refinanced. Higher rates take years to work through the whole debt, so interest keeps rising for a while even after rates stop climbing.
This series is the BEA national-accounts measure. The Federal Budget page uses the Treasury’s “net interest” budget function, which nets out interest the government receives and is somewhat lower.
Source: BEA via FRED (A091RC1Q027SBEA). Updated automatically when the source publishes. How we handle data · Embed this chart