US Average Interest Rate: Total Marketable Debt

3.39% as of May 2026 · U.S. Treasury Fiscal Data

Weighted average interest rate across all outstanding marketable Treasury securities, monthly.

LevelYoY %IndexedCSVJSON
2.004.006.00200520092013201720212025Drag across the chart or use the arrow keys to read each observation.

2001–2026 · 303 observationssource: U.S. Treasury Fiscal Data · vintage 2026-07-04

Methodology

Treasury Fiscal Data 'Average Interest Rates on U.S. Treasury Securities', 'Total Marketable' roll-up row. Monthly weighted average across bills, notes, bonds, TIPS, and FRNs, via the Bureau of the Fiscal Service.

Related series

US Average Interest Rate: TIPS
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US Average Interest Rate: Total Non-marketable Debt
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US Average Interest Rate: Treasury Bills
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US Average Interest Rate: Treasury Bonds
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US Average Interest Rate: Treasury Notes
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US Debt Held by the Public
USD