Generator
Polish tax microaccount generator
The tool reproduces the tax microaccount structure published by Poland’s Ministry of Finance and the NRB checksum standard. Your identifier is validated and processed locally.
Generator
Enter data
The identifier type and a valid Polish PESEL or NIP number. Fields marked with an asterisk are required.
How to use the calculator
- Choose PESEL or NIP and enter the identifier without spaces.
- Check that the result contains the fixed sequence 10100071222 and your identifier.
- Before paying, confirm the number with the official generator at podatki.gov.pl.
Calculation details
Formula and calculation method
The account body is 10100071222Y + identifier + zero padding. The first two digits are calculated with the NRB modulo 97 checksum.
Worked example
A valid identifier creates a 24-digit account body. The algorithm calculates two check digits and prefixes them to produce all 26 digits.
Limitations
- This is an independent implementation of a public algorithm, not a Ministry service. Never make a payment without official confirmation.
Sources
Engine version: 1.0 · Last reviewed: 3 August 2026
Frequently asked questions
Is my identifier sent to a server?
No. Validation and account generation run entirely in your browser.
Should I use a NIP or a PESEL?
Follow the Ministry of Finance rules and confirm the correct identifier if you are unsure.