Free 8% statutory interest calculator (Section 69)

Enter your principal claim amount and the date the payment or debt became overdue. This calculator calculates your statutory interest under Section 69 of the County Courts Act 1984 at 8% per annum (or commercial interest under the Late Payment Act), determines your exact daily rate, and formats the exact legal interest clause to copy into your court Particulars of Claim.

Interactive calculator

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The tool runs entirely in your browser; nothing you enter is sent anywhere.

How Section 69 interest works

• Discretionary but standard: The County Court has statutory power under Section 69 of the County Courts Act 1984 to award simple interest on money debts. While technically discretionary, claiming 8% per annum simple interest is standard civil litigation practice in England and Wales.
• Must be pleaded in your claim: If you do not expressly ask for Section 69 interest in your Particulars of Claim when issuing proceedings, the court cannot award it to you.
• Daily rate formula: `(Debt Amount × 0.08) ÷ 365 = Daily Interest Rate`.
• Continuing daily interest: You are entitled to claim interest not just up to the date of issuing your claim, but continuing at the same daily rate up to the date of final judgment or earlier payment.

Free national support

• Support Through Court: 0300 081 0000 - free, independent procedural support for litigants without a lawyer
• Citizens Advice consumer service: 0808 223 1133 - consumer dispute guidance
• HMCTS Courts and Tribunals Service Centre: 0300 123 7050 - general court queries

Drafting your claim documents? The Casewright Small Claims Builder formats your particulars of claim, calculates statutory interest, and builds court-ready bundles. Independent information directory; link is a sponsored referral.

This page is general information about County Court procedure, not legal advice, and it is not provided by HMCTS or any court.

Reviewed by Sean McNamara, 2026-09-07.