US Treasury interest rates: average rates on bills, notes, bonds and all federal debt, monthly

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Average interest rates on US Treasury securities by month from the Treasury's Fiscal Data: bills, notes, bonds, TIPS, floating rate notes and the non-marketable series, with totals for marketable, non-marketable and all interest-bearing debt, for the latest month and up to 24 months. US federal data, public domain, from a dated snapshot. Use for the US government's borrowing cost, a rate trend or macro context; not a live yield curve.

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Months of history for the totals, 1-24 (default 12)

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Inputs

NameTypeDescription
monthsintegerMonths of history for the totals, 1-24 (default 12)
securitystringOptional filter on the security name: bills, notes, bonds, TIPS, floating, marketable…

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Live result

The real answer to the request above, read 2026-11-10 14:43 UTC and refreshed every 15 minutes.

{
  "month": "2026-10",
  "recordDate": "2026-10-31",
  "rates": [
    {
      "type": "Marketable",
      "security": "Treasury Bills",
      "ratePercent": 4.014
    },
    {
      "type": "Marketable",
      "security": "Treasury Notes",
      "ratePercent": 3.399
    },
    {
      "type": "Marketable",
      "security": "Treasury Bonds",
      "ratePercent": 3.483
    },
    {
      "type": "Marketable",
      "security": "Treasury Inflation-Protected Securities (TIPS)",
      "ratePercent": 1.227
    },
    {
      "type": "Marketable",
      "security": "Treasury Floating Rate Notes (FRN)",
      "ratePercent": 4.17
    },
    {
      "type": "Marketable",
      "security": "Federal Financing Bank",
      "ratePercent": 2.383
    },
    {
      "type": "Marketable",
      "security": "Total Marketable",
      "ratePercent": 3.57
    },
    {
      "type": "Non-marketable",
      "security": "Domestic Series",
      "ratePercent": 7.577
    },
    {
      "type": "Non-marketable",
      "security": "Special Purpose Vehicle",
      "ratePercent": 3.14
    },
    {
      "type": "Non-marketable",
      "security": "State and Local Government Series",
      "ratePercent": 3.49
    },
    {
      "type": "Non-marketable",
      "security": "United States Savings Securities",
      "ratePercent": 3.131
    },
    {
      "type": "Non-marketable",
      "security": "United States Savings Inflation Securities",
      "ratePercent": 4.594
    },
    {
      "type": "Non-marketable",
      "security": "Government Account Series",
      "ratePercent": 3.629
    },
    {
      "type": "Non-marketable",
      "security": "Government Account Series Inflation Securities",
      "ratePercent": 1.393
    },
    {
      "type": "Non-marketable",
      "security": "Total Non-marketable",
      "ratePercent": 3.63
    },
    {
      "type": "Interest-bearing Debt",
      "security": "Total Interest-bearing Debt",
      "ratePercent": 3.58
    }
  ],
  "totals": {
    "marketable": 3.57,
    "nonMarketable": 3.63,
    "interestBearingDebt": 3.58
  },
  "history": [
    {
      "month": "2026-10",
      "marketable": 3.57,
      "nonMarketable": 3.63,
      "interestBearingDebt": 3.58
    },
    {
      "month": "2026-09",
      "marketable": 3.518,
      "nonMarketable": 3.592,
      "interestBearingDebt": 3.531
    },
    {
      "month": "2026-08",
      "marketable": 3.475,
      "nonMarketable": 3.559,
      "interestBearingDebt": 3.49
    },
    {
      "month": "2026-07",
      "marketable": 3.443,
      "nonMarketable": 3.463,
      "interestBearingDebt": 3.447
    },
    {
      "month": "2026-06",
      "marketable": 3.411,
      "nonMarketable": 3.399,
      "interestBearingDebt": 3.409
    },
    {
      "month": "2026-05",
      "marketable": 3.386,
      "nonMarketable": 3.201,
      "interestBearingDebt": 3.353
    },
    {
      "month": "2026-04",
      "marketable": 3.373,
      "nonMarketable": 3.191,
      "interestBearingDebt": 3.34
    },
    {
      "month": "2026-03",
      "marketable": 3.365,
      "nonMarketable": 3.154,
      "interestBearingDebt": 3.327
    },
    {
      "month": "2026-02",
      "marketable": 3.355,
      "nonMarketable": 3.161,
      "interestBearingDebt": 3.32
    },
    {
      "month": "2026-01",
      "marketable": 3.348,
      "nonMarketable": 3.175,
      "interestBearingDebt": 3.316
    },
    {
      "month": "2025-12",
      "marketable": 3.362,
      "nonMarketable": 3.159,
      "interestBearingDebt": 3.324
    },
    {
      "month": "2025-11",
      "marketable": 3.382,
      "nonMarketable": 3.201,
      "interestBearingDebt": 3.348
    }
  ],
  "note": "Monthly averages of the interest paid on outstanding securities, not today's market yields.",
  "snapshotAt": "2026-11-09T21:30:03.736Z",
  "dataset": "Average Interest Rates on U.S. Treasury Securities",
  "datasetUrl": "https://fiscaldata.treasury.gov/datasets/average-interest-rates-treasury-securities/",
  "source": "U.S. Depa
…

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