Late payment calculator

What you can add to an overdue commercial invoice under the Late Payment of Commercial Debts (Interest) Act 1998.

Invoice amount (£, excl. VAT)

Payment due date

Date paid

Still unpaid — calculate up to today

Days overdue—
Statutory interest —
Fixed compensation—
Total to add—

Rate applied: — — fixed by law on the six-monthly reference date for when your invoice fell overdue.