Polish statutory interest calculator
Enter the principal and the first and last chargeable day. The calculator splits the period whenever the Polish statutory rate changed from 2023 onward.
Sources and adopted values
Rate periods
| From | To | Days | Annual rate | Interest |
|---|---|---|---|---|
| Fill in the fields above — the result is computed on this page. | ||||
How do I use this page?
- Choose the interest type.
- Enter the principal.
- Enter the first and last chargeable day.
- Review the rate-period breakdown.
What this page does not do: This is an indicative calculation under Polish rules. It does not establish the due date and does not cover tax, social-security or commercial-transaction interest.
Further reading
Theory — how are Polish statutory interest payments calculated?
Statutory interest in Poland changes together with the NBP reference rate, so it is not a fixed value over time. When the chosen period covers a rate change, the whole span cannot be calculated with a single percentage. The calculator splits the entered dates into segments matching the rate in force at each moment and applies the formula separately to each one. Both the start and end dates are included in the count.