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Statutory interest calculator

Enter the invoice amount and the dates — we work out the statutory interest and the fixed compensation using the rates in force during the delay.

The rate depends on who owes whom: between businesses a higher rate and a fixed compensation apply; otherwise, statutory interest for late payment. The legal basis and the rate for each period of delay are shown with the result.

Who owes whom?

This determines the interest rate and whether the fixed compensation is due. We do not assess the contract itself — we ask about the status of the parties.

What is the unpaid amount for?

We ask to learn who this tool actually serves. Your answer changes neither the rate nor the interest — it decides what we show below the result.