Enter the invoice amount, due date, calculation date and applicable country regime. The tool estimates daily simple interest and any listed statutory recovery fee.
Turn the invoice details into a professional payment reminder.
Create payment reminderLate payment interest compensates a creditor for the time an invoice remains unpaid after its due date. Whether it may be charged, when it starts and which rate applies depend on the contract, the parties and local law.
The country selector distinguishes regimes where the source data does. For example, consumer and commercial claims can carry different rates and recovery fees.
The estimate uses: invoice amount × annual rate ÷ 365 × days overdue. A €1,000 invoice overdue for 30 days at 10% produces about €8.22 interest before any recovery fee.
Interest is calculated only for dates after the due date. The original invoice amount is not compounded in this estimator.
A contract may set a valid rate or remedy that replaces or changes a statutory default. Check the signed terms before relying on a statutory selection.
The displayed rate is an estimate from the dated source dataset. Reference rates can change during a long overdue period, so split-period calculations may be required.
Confirm that the selected regime covers both parties and the invoice. Recovery compensation is not universally available and consumer claims are often treated differently.
Suppose a €2,400 commercial invoice was due on 1 March and remains unpaid through 31 March. With an annual rate of 10%, the simple estimate is €2,400 × 10% ÷ 365 × 30, or €19.73. Any fixed recovery compensation is shown separately so the principal, interest and fee are not confused.
The arithmetic does not prove that the selected rate applies. Confirm the governing law, transaction type, effective rate period and whether the contract contains a valid alternative. If the statutory rate changed during the overdue period, split the calculation at the change date instead of applying one rate to every day.
General informational estimate, not legal advice.
