Kentucky Late Fee Calculator
Work out interest on an overdue B2B invoice under Kentucky law. The legal default rate — what applies when the contract is silent — is 8%, and the statute is quoted verbatim below. All math runs locally in your browser.
Legal rate, recoverable after default until judgment when the contract names no rate.
Late fee breakdown
- Interest owed
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- Daily rate
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- Total (invoice + interest)
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Still unpaid? Generate a formal demand letter — it computes the interest and cites Kentucky's statute (KRS 360.010) for you.
What Kentucky law actually says
the legal rate of interest is eight percent (8%) per annum, but any party or parties may agree, in writing, for the payment of interest in excess of that rate as follows: (a) At a per annum rate not to exceed four percent (4%) in excess of the discount rate on ninety (90) day commercial paper [...] or nineteen percent (19%), whichever is less, [...] where the original principal amount is fifteen thousand dollars ($15,000) or less; and (b) At any rate [...]
Quoted verbatim from the linked official source — not our paraphrase. How we source and re-check every row is documented in the data methodology.
Maximum late fee in Kentucky — written B2B contracts
Conditional cap 19% (non-entity, $15,000 or less).
Over $15,000: any rate. At/under $15,000: lesser of Fed 90-day CP discount+4 pts or 19%. Corp/LLC debtors can't plead usury, so the cap really bites only small sole-prop debts.
Basis: KRS 360.010(1). Compare all 51 jurisdictions on the full state table and the cap-regime map.
B2B invoices only — not rent, not consumer debt
Everything on this page is about business-to-business invoices. Residential rent late fees live in Kentucky's landlord-tenant law and consumer credit has separate, stricter rules — two different bodies of law. The distinction is explained in B2B invoice late fees vs. residential rent.
Use this data
Kentucky's row — rate, cap, citation, verbatim quote, verification date — is part of our open 51-jurisdiction dataset: CSV · JSON (CC BY 4.0, cite myinvoicetemplate.com). Set late-fee terms on your next invoice with the free invoice generator, or state them clearly using the wording guidance in the payment terms guide.
Kentucky late fee FAQ
Can I charge late fees on overdue invoices in Kentucky?
Yes — on business-to-business invoices. If your contract or invoice states a late-fee rate, that rate governs (subject to the cap rules below). If nothing was agreed: 8%. Legal rate, recoverable after default until judgment when the contract names no rate. Statute: KRS 360.010, verified 2026-08-19. Consumer and rent debts follow separate laws.
What is the maximum late fee I can charge in Kentucky?
For a written B2B contract: Principal of $15,000 or less: lesser of Fed 90-day commercial-paper discount +4 pts or 19%. Over $15,000: any agreed rate. Basis: KRS 360.010(1). The full cap analysis is in the section above; this covers business-to-business deals only — consumer credit has stricter separate caps.
What interest applies if my contract doesn't mention late fees in Kentucky?
The statutory default rate of 8%. Legal rate, recoverable after default until judgment when the contract names no rate. Statute: KRS 360.010 (verbatim quote on this page, verified 2026-08-19).
Does this cover rent, apartment, or consumer late fees in Kentucky?
No. This page covers business-to-business invoices only. Residential rent late fees are governed by Kentucky's landlord-tenant law, and consumer credit for personal, family, or household purposes has its own stricter caps and disclosure rules. Those are different statutes than the commercial-interest law cited here.
Where does this data come from, and when was it verified?
Every figure on this page comes from our 51-jurisdiction dataset: each row researched against the controlling statute or the state's official current-rate page, independently re-checked, and stamped with its own verification date — Kentucky's row was last verified 2026-08-19. The operative legal text is quoted verbatim on this page with a link to the official source, the methodology is public, every verification pass is logged in the changelog, and the full dataset is downloadable (CC BY 4.0).
Not legal advice. This page summarizes Kentucky's commercial-interest statute for general information, with the verification date shown above — it tells you when we last confirmed the figures, not that they are still current today. Statutes change and courts interpret them; verify the cited statute at the official source, or ask a licensed attorney in your state, before charging or demanding interest.