How this data is collected

Trust comes from provenance. Here is exactly where every number comes from, how often it refreshes, and what we do and don't guarantee.

Sources — official and public-domain

Every value traces to a primary U.S. government source, which are federal government works in the public domain:

• Alaska judgment interest (Alaska Stat. 09.30.070(a)) — Alaska — public.courts.alaska.gov. https://public.courts.alaska.gov/web/forms/docs/adm-505.pdf
• Alaska prejudgment interest (AS 09.30.070) — Alaska — public.courts.alaska.gov. https://public.courts.alaska.gov/web/forms/docs/adm-505.pdf
• Alabama judgment interest (Ala. Code § 8-8-10(a)) — Alabama — alison.legislature.state.al.us. https://alison.legislature.state.al.us/code-of-alabama?section=8-8-10
• Alabama prejudgment interest (Ala. Code § 8-8-1) — Alabama — alison.legislature.state.al.us. https://alison.legislature.state.al.us/code-of-alabama?section=8-8-1
• Arkansas judgment interest (Ark. Code Ann. § 16-65-114(a)) — Arkansas — federalreserve.gov. https://www.federalreserve.gov/releases/h15/
• Arkansas prejudgment interest (Ark. Code Ann. § 16-65-114(a)(1)) — Arkansas — codes.findlaw.com. https://codes.findlaw.com/ar/title-16-practice-procedure-and-courts/ar-code-sect-16-65-114/
• Arizona judgment interest (A.R.S. §44-1201) — Arizona State Legislature (official). https://www.azleg.gov/ars/44/01201.htm
• Arizona prejudgment interest (A.R.S. § 44-1201(A), &) — Arizona — azleg.gov. https://www.azleg.gov/ars/44/01201.htm
• Bank of England — Bank Rate (IUDBEDR) — Bank of England. https://www.bankofengland.co.uk/boeapps/database/Bank-Rate.asp
• California Code of Civil Procedure §685.010 — California Legislative Information (official). https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP&sectionNum=685.010
• California prejudgment interest (Cal. Civ. Code sec. 3287) — California — leginfo.legislature.ca.gov. https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=3289.&lawCode=CIV
• Colorado prejudgment interest (C.R.S. 5-12-102) — Colorado — colorado.public.law. https://colorado.public.law/statutes/crs_5-12-102
• Colorado judgment interest (C.R.S. §5-12-102 / §13-21-101) — Colorado Secretary of State (official rate certification). https://www.coloradosos.gov/pubs/info_center/files/interest_rates.pdf
• Connecticut judgment interest (Conn. Gen. Stat. §37-3a) — Connecticut — cga.ct.gov. https://www.cga.ct.gov/current/pub/chap_673.htm
• Connecticut prejudgment interest (Conn. Gen. Stat. § 37-3a(a)) — Connecticut — portal.ct.gov. https://portal.ct.gov/wcc/statutes-and-regulations/do-not-use-related-statutes/2021-related-statutes/37-3a
• District of Columbia judgment interest (D.C. Code § 28-3302(c)) — District of Columbia — code.dccouncil.gov. https://code.dccouncil.gov/us/dc/council/code/sections/28-3302
• D.C. prejudgment interest (D.C. Code § 15-108) — D.C. — code.dccouncil.gov. https://code.dccouncil.gov/us/dc/council/code/sections/15-108
• Delaware judgment interest (6 Del. C. § 2301) — Delaware — delcode.delaware.gov. https://delcode.delaware.gov/title6/c023/
• Delaware prejudgment interest (6 Del. C. § 2301(a)) — Delaware — delcode.delaware.gov. https://delcode.delaware.gov/title6/c023/
• ECB — Main Refinancing Operations fixed rate (MRR) — European Central Bank. https://data.ecb.europa.eu/data/datasets/FM/FM.B.U2.EUR.4F.KR.MRR_FR.LEV
• Federal Reserve H.15 — 1-Year Treasury Constant Maturity — Board of Governors of the Federal Reserve System. https://www.federalreserve.gov/releases/h15/
• Florida judgment interest rate (Fla. Stat. §55.03) — Florida Chief Financial Officer (official). https://myfloridacfo.com/division/aa/audits-reports/judgment-interest-rates
• Florida prejudgment interest (Fla. Stat. § 55.03) — Florida — myfloridacfo.com. https://myfloridacfo.com/division/aa/audits-reports/judgment-interest-rates
• Georgia judgment interest (O.C.G.A. §7-4-12) — Official Code of Georgia Annotated. http://ga.elaws.us/law/section7-4-12
• Georgia prejudgment interest (O.C.G.A. § 7-4-15) — Georgia — ga.elaws.us. http://ga.elaws.us/law/section7-4-2
• Hawaii judgment interest (Haw. Rev. Stat. 478-3. Related: 478-2) — Hawaii — capitol.hawaii.gov. https://www.capitol.hawaii.gov/hrscurrent/Vol11_Ch0476-0490/HRS0478/HRS_0478-0003.htm
• Hawaii prejudgment interest (HRS 636-16) — Hawaii — data.capitol.hawaii.gov. https://data.capitol.hawaii.gov/sessions/session2017/HRS-Chapter-PDF's/HRS_0478.pdf
• Iowa Code §668.13 — Iowa Legislature (official). https://www.legis.iowa.gov/docs/code/668.13.pdf
• Iowa prejudgment interest (Iowa Code § 668.13) — Iowa — legis.iowa.gov. https://www.legis.iowa.gov/docs/code/668.13.pdf
• Idaho judgment interest (Idaho Code § 28-22-104(2)) — Idaho — sto.idaho.gov. https://sto.idaho.gov/Banking/Legal-Rate-of-Interest
• Idaho prejudgment interest (Idaho Code 28-22-104(1)) — Idaho — legislature.idaho.gov. https://legislature.idaho.gov/statutesrules/idstat/title28/t28ch22/sect28-22-104/
• Illinois judgment interest (735 ILCS 5/2-1303) — Illinois General Assembly (official). https://www.ilga.gov/legislation/ilcs/fulltext?DocName=073500050K2-1303
• Illinois prejudgment interest (735 ILCS 5/2-1303(c)) — Illinois — ilga.gov. https://ilga.gov/documents/legislation/ilcs/documents/081502050K2.htm
• Indiana judgment interest (Ind. Code § 24-4.6-1-101) — Indiana — iga.in.gov. https://iga.in.gov/laws/2025/ic/titles/24
• Indiana prejudgment interest (Contract/liquidated: IC 24-4.6-1-103) — Indiana — iga.in.gov. https://iga.in.gov/laws/2024/ic/titles/24#24-4.6-1-103
• IRS quarterly interest rates (§6621) — U.S. Internal Revenue Service. https://www.irs.gov/payments/quarterly-interest-rates
• Kansas judgment interest (Kan. Stat. Ann. 16-204) — Kansas — sos.ks.gov. https://sos.ks.gov/general-services/finance-rates.html
• Kansas prejudgment interest (K.S.A. 16-201) — Kansas — ksrevisor.gov. https://ksrevisor.gov/statutes/chapters/ch16/016_002_0001.html
• Kentucky judgment interest (KRS 360.040) — Kentucky — apps.legislature.ky.gov. https://apps.legislature.ky.gov/law/statutes/statute.aspx?id=45719
• Kentucky prejudgment interest (KRS 360.010(1)) — Kentucky — apps.legislature.ky.gov. https://apps.legislature.ky.gov/law/statutes/statute.aspx?id=47989
• Louisiana judgment interest (La. R.S. 13:4202(B)) — Louisiana — ofi.la.gov. https://ofi.la.gov/legal/statutes-rules-policies-opinions/judicial-interest-rates/
• Louisiana prejudgment interest (La. R.S. 13:4202) — Louisiana — ofi.la.gov. https://ofi.la.gov/legal/statutes-rules-policies-opinions/judicial-interest-rates/
• Massachusetts G.L. c.231 §§6B–6C — Massachusetts Legislature (official). https://malegislature.gov/Laws/GeneralLaws/PartIII/TitleII/Chapter231/Section6B
• Massachusetts prejudgment interest (M.G.L. c. 231, § 6B) — Massachusetts — malegislature.gov. https://malegislature.gov/Laws/GeneralLaws/PartIII/TitleII/Chapter231/Section6B
• Maryland judgment interest (Md. Code, Courts & Judicial Proceedings Section 11-107(a)) — Maryland — mgaleg.maryland.gov. https://mgaleg.maryland.gov/mgawebsite/laws/StatuteText?article=gcj&section=11-107
• Maryland prejudgment interest (Md. Const. Art. III, sec. 57) — Maryland — mgaleg.maryland.gov. https://mgaleg.maryland.gov/Pubs/LegisLegal/2025-constitution-maryland-us.pdf
• Maine judgment interest (14 M.R.S. §1602-C) — Maine — legislature.maine.gov. https://legislature.maine.gov/statutes/14/title14sec1602-C.html
• Maine prejudgment interest (14 M.R.S. § 1602-B) — Maine — legislature.maine.gov. https://legislature.maine.gov/statutes/14/title14sec1602-B.html
• Michigan judgment interest (MCL §600.6013) — Michigan Legislature (official). https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-6013
• Michigan prejudgment interest (MCL 600.6013) — Michigan — legislature.mi.gov. https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-6013
• Minnesota judgment interest (Minn. Stat. § 549.09, subd. 1(c)) — Minnesota — revisor.mn.gov. https://www.revisor.mn.gov/court_rules/rule/msinte/
• Minnesota prejudgment interest (Minn. Stat. § 549.09, subd. 1(b)) — Minnesota — revisor.mn.gov. https://www.revisor.mn.gov/statutes/cite/549.09
• Missouri judgment interest (Mo. Rev. Stat. §408.040) — Missouri — revisor.mo.gov. https://revisor.mo.gov/main/OneSection.aspx?section=408.040
• Missouri prejudgment interest (Mo. Rev. Stat. § 408.040) — Missouri — revisor.mo.gov. https://revisor.mo.gov/main/OneSection.aspx?section=408.040
• Mississippi prejudgment interest (Miss. Code Ann. § 75-17-7) — Mississippi — law.justia.com. https://law.justia.com/codes/mississippi/title-75/chapter-17/general-provisions/section-75-17-7/
• Montana judgment interest (Mont. Code Ann. § 25-9-205) — Montana — mca.legmt.gov. https://mca.legmt.gov/bills/mca/title_0250/chapter_0090/part_0020/section_0050/0250-0090-0020-0050.html
• Montana prejudgment interest (MCA 27-1-211) — Montana — mca.legmt.gov. https://mca.legmt.gov/bills/mca/title_0270/chapter_0010/part_0020/section_0110/0270-0010-0020-0110.html
• North Carolina judgment interest (N.C.G.S. §24-5 / §24-1) — North Carolina General Assembly (official). https://www.ncleg.gov/EnactedLegislation/Statutes/HTML/BySection/Chapter_24/GS_24-5.html
• North Carolina prejudgment interest (N.C. Gen. Stat. 24-5) — North Carolina — ncleg.net. https://www.ncleg.net/EnactedLegislation/Statutes/PDF/BySection/Chapter_24/GS_24-5.pdf
• North Dakota judgment interest (N.D.C.C. § 28-20-34) — North Dakota — ndcourts.gov. https://www.ndcourts.gov/state-court-administration/interest-rate-on-judgments
• North Dakota prejudgment interest (N.D.C.C. § 32-03-04) — North Dakota — ndlegis.gov. https://ndlegis.gov/cencode/t32c03.pdf
• Nebraska judgment interest (Neb. Rev. Stat. § 45-103) — Nebraska — nebraskajudicial.gov. https://nebraskajudicial.gov/rules/administrative-policies-schedules/judgment-interest-rate
• Nebraska prejudgment interest (Neb. Rev. Stat. sec. 45-104) — Nebraska — nebraskalegislature.gov. https://nebraskalegislature.gov/laws/statutes.php?statute=45-104
• New Hampshire judgment interest (N.H. Rev. Stat. Ann. 336:1, II) — New Hampshire — courts.nh.gov. https://www.courts.nh.gov/our-courts/superior-court/civil/civil-interest-rates
• New Hampshire prejudgment interest (RSA 336:1, II) — New Hampshire — courts.nh.gov. https://www.courts.nh.gov/our-courts/superior-court/civil/civil-interest-rates
• New Jersey post-judgment interest (R. 4:42-11) — New Jersey Courts (official). https://www.njcourts.gov/notices/notice-post-judgment-interest-rate-calendar-year-2026-rule-442-11
• New Jersey prejudgment interest (N.J. Ct. R. 4:42-11(b)) — New Jersey — njcourts.gov. https://www.njcourts.gov/sites/default/files/courts/civil/postprejudgmentrates.pdf
• New Mexico judgment interest (N.M. Stat. Ann. § 56-8-4) — New Mexico — law.justia.com. https://law.justia.com/codes/new-mexico/chapter-56/article-8/section-56-8-4/
• New Mexico prejudgment interest (NMSA 1978, Sec. 56-8-4(B)) — New Mexico — codes.findlaw.com. https://codes.findlaw.com/nm/chapter-56-commercial-instruments-and-transactions/nm-st-sect-56-8-4/
• Nevada judgment interest (Nev. Rev. Stat. 17.130(2)) — Nevada — fid.nv.gov. https://fid.nv.gov/uploadedFiles/fidnvgov/content/Resources/Prime%20Interest%20Rate%20July%201,%202026.pdf
• Nevada prejudgment interest (NRS 99.040) — Nevada — leg.state.nv.us. https://www.leg.state.nv.us/NRS/NRS-099.html
• New York prejudgment interest (N.Y. C.P.L.R. 5004) — New York — nysenate.gov. https://www.nysenate.gov/legislation/laws/CVP/5004
• New York CPLR 5004 — New York State Senate (official statute text). https://www.nysenate.gov/legislation/laws/CVP/5004
• Ohio prejudgment interest (Ohio Rev. Code 1343.03) — Ohio — codes.ohio.gov. https://codes.ohio.gov/ohio-revised-code/section-1343.03
• Ohio judgment interest (R.C. §1343.03 / §5703.47) — Ohio Department of Taxation (official). https://tax.ohio.gov/individual/resources/annual-interest-rates
• Oklahoma judgment interest (12 O.S. Sec. 727.1) — Oklahoma — oscn.net. https://www.oscn.net/applications/oscn/DeliverDocument.asp?CiteID=551111
• Oklahoma prejudgment interest (12 O.S. Sec. 727.1) — Oklahoma — oscn.net. https://www.oscn.net/applications/oscn/DeliverDocument.asp?CiteID=551111
• Oregon judgment interest (ORS 82.010(2)) — Oregon — oregonlegislature.gov. https://www.oregonlegislature.gov/bills_laws/ors/ors082.html
• Oregon prejudgment interest (ORS 82.010(1)(a)) — Oregon — oregon.public.law. https://oregon.public.law/statutes/ors_82.010
• Pennsylvania prejudgment interest (41 P.S. Sec. 202) — Pennsylvania — pacodeandbulletin.gov. https://www.pacodeandbulletin.gov/secure/pacode/data/231/chapter200/s238.html
• Pennsylvania judgment interest (42 Pa.C.S. §8101; 41 P.S. §202) — Pennsylvania General Assembly (official). https://www.legis.state.pa.us/WU01/LI/LI/CT/HTM/42/00.081.001.000..HTM
• Rhode Island judgment interest (R.I. Gen. Laws § 9-21-10) — Rhode Island — webserver.rilegislature.gov. https://webserver.rilegislature.gov/Statutes/TITLE9/9-21/9-21-10.HTM
• Rhode Island prejudgment interest (R.I. Gen. Laws § 9-21-10) — Rhode Island — webserver.rilegislature.gov. https://webserver.rilegislature.gov/Statutes/TITLE9/9-21/9-21-10.HTM
• South Carolina judgment interest (S.C. Code Ann. § 34-31-20(B)) — South Carolina — scstatehouse.gov. https://www.scstatehouse.gov/code/t34c031.php
• South Carolina prejudgment interest (S.C. Code Ann. § 34-31-20(A)) — South Carolina — scstatehouse.gov. https://www.scstatehouse.gov/code/t34c031.php
• South Dakota judgment interest (SDCL § 54-3-5.1) — South Dakota — sdlegislature.gov. https://sdlegislature.gov/Statutes/54-3-5.1
• South Dakota prejudgment interest (SDCL 21-1-13.1) — South Dakota — sdlegislature.gov. https://sdlegislature.gov/Statutes/21-1-13.1
• Tennessee post-judgment interest (Tenn. Code §47-14-121) — Tennessee Courts / Dept. of Financial Institutions (official). https://www.tncourts.gov/tennessee-judgment-interest-rates
• Tennessee prejudgment interest (Tenn. Code Ann. § 47-14-123) — Tennessee — codes.findlaw.com. https://codes.findlaw.com/tn/title-47-commercial-instruments-and-transactions/tn-code-sect-47-14-123/
• Texas post-judgment interest rate (Fin. Code §304.003) — Texas Office of Consumer Credit Commissioner (official). https://occc.texas.gov/publications/interest-rates/
• Texas prejudgment interest (Tex. Fin. Code Sec. 304.102) — Texas — statutes.capitol.texas.gov. https://statutes.capitol.texas.gov/Docs/FI/pdf/FI.304.pdf
• Utah judgment interest (Utah Code Ann. Sec. 15-1-4) — Utah — utcourts.gov. https://www.utcourts.gov/en/court-records-publications/resources/interest-rates/interestrates.html
• Utah prejudgment interest (Utah Code Ann. 15-1-1(2)) — Utah — le.utah.gov. https://le.utah.gov/xcode/Title15/Chapter1/15-1-S1.html
• Virginia judgment interest (Va. Code §6.2-302) — Virginia General Assembly (official). https://law.lis.virginia.gov/vacode/title6.2/chapter3/section6.2-302/
• Virginia prejudgment interest (Va. Code Ann. § 8.01-382) — Virginia — law.lis.virginia.gov. https://law.lis.virginia.gov/vacode/title8.01/chapter13/section8.01-382/
• Vermont judgment interest (9 V.S.A. § 41a(a)) — Vermont — legislature.vermont.gov. https://legislature.vermont.gov/statutes/section/09/004/00041a
• Vermont prejudgment interest (9 V.S.A. § 41a(a)) — Vermont — legislature.vermont.gov. https://legislature.vermont.gov/statutes/section/09/004/00041a
• Washington prejudgment interest (RCW 19.52.010(1)) — Washington — app.leg.wa.gov. https://app.leg.wa.gov/rcw/default.aspx?cite=19.52.010
• Washington post-judgment interest (RCW 4.56.110) — Washington State Legislature (official). https://app.leg.wa.gov/rcw/default.aspx?cite=4.56.110
• Wisconsin judgment interest (Wis. Stat. § 815.05(8)) — Wisconsin — docs.legis.wisconsin.gov. https://docs.legis.wisconsin.gov/document/statutes/815.05(8
• Wisconsin prejudgment interest (Wis. Stat. 138.04) — Wisconsin — docs.legis.wisconsin.gov. https://docs.legis.wisconsin.gov/statutes/statutes/138/04
• West Virginia judgment interest (W. Va. Code § 56-6-31) — West Virginia — courtswv.gov. https://www.courtswv.gov/public-resources/news-publications/press-page/press-releases/supreme-court-sets-2026-interest-rate
• West Virginia prejudgment interest (W. Va. Code § 56-6-31(b)) — West Virginia — code.wvlegislature.gov. https://code.wvlegislature.gov/56-6-31/
• Wyoming judgment interest (Wyo. Stat. Ann. 1-16-102) — Wyoming — wyoleg.gov. https://wyoleg.gov/statutes/compress/title01.pdf
• Wyoming prejudgment interest (Wyo. Stat. Ann. Sec. 40-14-106(e)) — Wyoming — wyoleg.gov. https://wyoleg.gov/statutes/compress/title40.pdf

We store the extracted values and their provenance (source URL, effective date, retrieval time) — never the source's prose. All site copy is written by us.

How the pipeline works

1. A polite fetcher retrieves each official page/feed (honest user-agent, rate-limited, robots.txt respected, responses cached so we never re-hit a server needlessly).
2. Values are parsed into a normalized schema and loaded into a database, with each observation keyed to its effective date so history is preserved, never overwritten.
3. A validation suite checks types, sane ranges, source freshness, and cross-value consistency. If anything fails, the dataset is not published — stale or broken data never ships.
4. Validated data is exported to versioned JSON that powers this site and the API.

How fresh it is

IRS quarterly; US Treasury/post-judgment weekly; UK/EU statutory rates semi-annual; BoE/ECB policy rates on decision. Refreshed weekly. The dataset was last compiled on July 10, 2026; every page shows the effective date of the value it displays.

Published vs. derived values

Most values are published directly by the source (marked "Published value"). A few — notably the federal post-judgment rate — are derived from an official series using the governing statutory formula (marked "Derived value"), and each such page shows the exact formula and a reminder to confirm the controlling figure. We never present a computed number as authoritative without its formula and source.

What we don't do

• We don't collect any personal data.
• We don't give legal, tax, or financial advice — these are reference values.
• We don't paywall the data or the API.