Statutory interest
8% plus the Bank of England base rate, for business to business transactions. You cannot claim it if your contract sets a different rate.
Free late payment interest calculator
What can you claim on a late invoice?
When another business pays you late, the law lets you claim interest at 8% plus the Bank of England base rate, and a fixed sum for the cost of chasing it. Enter the invoice and the dates, and see what you can claim, day by day.
The calculator needs JavaScript to work out the figures.
Your right to claim
Between businesses, where no other rate is agreed.
The base rate it uses
The base rate on 30 June or 31 December before the payment became late. It stays fixed for that debt.
A fixed sum on top
£40 for a debt up to £999.99, £70 from £1,000 to £9,999.99, and £100 for £10,000 or more - once per payment. Send a new invoice to claim it.
HMRC's guidance on GOV.UK: Late commercial payments: charging interest. Worked out with the same rule as the Stoneledger software.
What Stoneledger does
Who owes you, for how long.
- Every unpaid invoice, longest outstanding first, with how many days late it is.
- What you could claim on each late one, the interest and the fixed sum, by the same rule as this calculator.
- A chase email ready, with the invoice, the amount and the claim filled in.
Know who owes you, and for how long.
Every unpaid invoice in view, with a chase ready for the ones that are late.