UK late payment interest calculator

UK law lets businesses charge interest at 8% above the Bank of England base rate on late business invoices, plus a fixed fee of £40, £70 or £100.

Invoice amount (£)

Due date

Yearly interest rate (%)

8% plus the current Bank of England base rate. Check today's base rate before claiming.

45 days late

Interest

£37

Fixed compensation

£70

Total you can claim

£2,607

This is a guide, not legal advice. It applies to business-to-business invoices under the Late Payment of Commercial Debts (Interest) Act 1998.