Statutory Interest Calculator

Calculate how much statutory interest and fixed-sum compensation you can claim on an overdue commercial invoice under the Late Payment of Commercial Debts (Interest) Act 1998.

This calculator is provided for informational purposes only and does not constitute legal advice. Calculations are based on the Late Payment of Commercial Debts (Interest) Act 1998 as applicable in England and Wales. The Bank of England base rate used is 3.75% effective from 18 December 2025. Verify the current rate before relying on these figures in formal correspondence.