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 4.48 percent, in force since 25 Sep 2026, cited to 28 U…. It was 4.24 percent before that. Last checked against the official source on 1 Oct 2026.
Official source: 28 U… · Last checked 2026-10-01 · 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.
Compare statutory interest rate across all 10 North American countries →
| Current value | 4.48 percent |
|---|---|
| In force from | 2026-09-25 |
| Official source | 28 U… — Board of Governors of the Federal Reserve System, H.15 Data Download weekly averages CSV, series 'Market yield on U.S. Treasury securities at 1-year constant maturity, quoted on in: 'Series Description: "Market yield on U.S. Treasury securities at 1-year constant maturity, quoted on investment basis" | Unit: "Percent:_Per_Year" | Unique Identifier: "H15/H15/RIFLGFCY01_N.WF" | Time Period code: "RIFLGFCY01_N.WF" | 2026-09-25: 4.48' |
| Last verified | 2026-10-01 |
| Verification | primary — No verification limitation recorded — read from the official source cited. |
| Provenance | source fingerprint |
What this value means
Latest published H.15 weekly average in the 2026-10-01 Data Download (52 weekly observations; last Time Period 2026-09-25). Same column RIFLGFCY01_N.WF also prints 2026-09-18=4.41 and the catalog's current 2026-09-11=4.24 (live https://usaref.dev/v1/us/statutory-interest value 4.24, effective_from 2026-09-11, last_confirmed 2026-09-21, stale=true). Earlier prints in this file match prior fleet notes: 2026-09-04=4.15 and 2026-07-31=4.08. effective_from is the week-ending Friday of the weekly average; every Time Period in the file is a Friday. 28 U.S.C. § 1961(a) (United States Code, 2023 Edition, govinfo) sets the post-judgment rate equal to this weekly average 1-year constant maturity Treasury yield for the calendar week preceding the date of the judgment; § 1961(b) compounds annually. Scalar percent, same shape as the catalog. Not a state judgment or legal rate, not the daily 1-year constant maturity on the H.15 HTML release dated September 30, 2026, and not a monthly average. The week ending 2026-10-02 is not in the file. Administrative Office page https://www.uscourts.gov/court-programs/fees/post-judgment-interest-rate says weekly averages are no longer printed on the H.15 release and are available through the Board's Data Download Program.
Earlier values
| From | Value | Source |
|---|---|---|
| 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
curl https://usaref.dev/v1/us/statutory-interest
# $0.005 per call — x402 on Base (USDC). No key, no signup.
# History: curl https://usaref.dev/v1/us/statutory-interest/history?from=2020-01-01
# Provenance: curl https://usaref.dev/provenance/us/statutory-interestOther 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
The same figure elsewhere: Canada · Costa Rica · Dominican Republic · El Salvador · Guatemala · all 10