What rate can I charge?

Whatever your terms say. Some countries set a statutory rate for business invoices, such as 8% above the central bank rate in the UK and EU. Check the rules that apply to you.

No. Everything is calculated in your browser and your inputs are saved only on this device.

Nightroll

Free Late Payment Interest Calculator

Enter the invoice amount, due date and rate to see the interest owed.

Invoice amountDue datePayment dateInterest rate per year (%)Fixed late fee

Results

Days overdue–

Interest–

Total now due–

Currency

How to make a late-payment interest calculation

Enter the invoice amount and its due date.
Enter the payment date (today by default), the yearly interest rate and any fixed late fee.
Read the days overdue, the interest and the total now due, then send a payment reminder.

Frequently asked questions

What rate can I charge?: Whatever your terms say. Some countries set a statutory rate for business invoices, such as 8% above the central bank rate in the UK and EU. Check the rules that apply to you.
Is my data stored?: No. Everything is calculated in your browser and your inputs are saved only on this device.