Late payment interest calculator
A client paid late? On UK commercial (B2B) invoices you can legally claim statutory interest plus fixed compensation. Work out exactly how much. Free, instant, nothing stored.
£
days
%
Statutory interest for B2B invoices is 8% above the Bank of England base rate. Enter the current total here (base rate + 8). Check the latest base rate before relying on a figure.
You can claim
£1,584.79
Debt
£1,500.00
Interest
£14.79
Compensation
£70.00
Fixed compensation is set by law: £40 for debts under £1,000, £70 up to £9,999.99, and £100 for £10,000+. This is a guide for UK commercial (B2B) invoices, not legal advice.
Better than claiming interest: not being paid late.
ClientRoost sends polite, escalating reminders automatically so most invoices get paid before they ever reach this point, and you can deliver final files behind a pay-to-unlock link. Free to start.