United States Federal post-judgment interest rate (28 U.S.C. § 1961)
United States Federal post-judgment interest rate (28 U.S.C. § 1961) is 4.52 percent, in force since 2 Oct 2026, cited to Board of Governors of the Federal Reserve System, H.15 Data Download weekly averages. It was 4.48 percent before that. Last checked against the official source on 12 Oct 2026.
Official source: Board of Governors of the Federal Reserve System, H.15 Data Download weekly averages, series RIFLGFCY01_N.WF · Last checked 2026-10-12 · source fingerprint
The United States has no single national statutory interest rate. The one federally fixed figure is the post-judgment rate under 28 U.S.C. § 1961 — the weekly average 1-year constant maturity Treasury yield for the calendar week preceding judgment, compounded annually — currently 4.08% (week ending 31 July 2026). State judgment and legal rates are set separately by each state and are NOT this number.
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| Current value | 4.52 percent |
|---|---|
| In force from | 2026-10-02 |
| Official source | Board of Governors of the Federal Reserve System, H.15 Data Download weekly averages, series RIFLGFCY01_N.WF (Market yield on U.S. Treasury securities at 1-year constant maturity, quoted on investment basis; Unit Percent:_Per_Year), week ending 2026-10-02: 4.52. The 28 U.S.C. § 1961 post-judgment rate. |
| Last verified | 2026-10-12 |
| Verification | primary — No verification limitation recorded — read from the official source cited. |
| Provenance | source fingerprint |
What this value means
Newer week than the live value 4.48 effective_from 2026-09-25. The same column prints 2026-09-25: 4.48 and 2026-07-31: 4.08. A fresh lastobs=3 download on 2026-10-12 ends at 2026-10-02; there is no 2026-10-09 row yet (fetch was 07:16 UTC, before the usual Monday H.15 release). effective_from is the week-ending Friday, the live series convention for 28 U.S.C. § 1961. Not the IRS quarterly underpayment rate, not a state judgment rate, and not the daily 1-year constant maturity.
Earlier values
| From | Value | Source |
|---|---|---|
| 2026-09-25 | 4.48 | 28 U… — Board of Governors of the Federal Reserve System… |
| 2026-09-11 | 4.24 | 28 U… — Board of Governors of the Federal Reserve System… |
| 2026-09-04 | 4.15 | H.15 weekly average 1-year CMT. Not daily EFFR. Prior fleet… |
| 2026-08-03 | 4.08 | 28 U.S.C. § 1961(a): 'Such interest shall be calculated… |
Get it programmatically
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# History: curl https://usaref.dev/v1/us/statutory-interest/history?from=2020-01-01
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Other United States series: Federal funds target range (upper bound) · Value added tax · VAT registration threshold · State general sales tax rate · Federal minimum wage (FLSA) · Federal public holidays 2026 · Consumer Price Index (CPI-U), 12-month change · Federal corporate income tax rate · Withholding tax rates · Federal individual income tax brackets (single filer, tax year 2026) · Statutory social-insurance contributions · Federal Reserve H.10 foreign exchange reference rates · Tax filing deadlines
The same figure elsewhere: Canada · Costa Rica · Dominican Republic · El Salvador · Guatemala · all 10