US Average Interest Rate: Treasury Bills

3.69% as of May 2026 · U.S. Treasury Fiscal Data

Weighted average interest rate on outstanding marketable Treasury bills, monthly.

LevelYoY %IndexedCSVJSON
0.0050.00100200520092013201720212025Drag across the chart or use the arrow keys to read each observation.

2001–2026 · 305 observationssource: U.S. Treasury Fiscal Data · vintage 2026-07-04

Methodology

Treasury Fiscal Data 'Average Interest Rates on U.S. Treasury Securities', filtered to marketable Treasury Bills. Monthly weighted average of rates on outstanding securities, via the Bureau of the Fiscal Service.

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US Average Interest Rate: Total Marketable Debt
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US Debt Held by the Public
USD