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Mikrorachunek Generator
Generate your individual Polish tax account number (mikrorachunek podatkowy) from a PESEL or NIP.
REGON Number Checker
Check any 9-digit or 14-digit Polish REGON number with automatic format detection and checksum verification.
Mikrorachunek Checker
Check whether a mikrorachunek podatkowy number matches the official format and extract the embedded PESEL or NIP.
Top articles
How to Pay a PIT Underpayment in Poland
Owe money after filing your PIT in Poland? Learn how to pay a niedopłata step by step, including deadlines, transfer details, and late payment interest.
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Step-by-step guide to blocking your PESEL number via mObywatel, your bank, or in person. Learn what zastrzeżenie PESEL protects and how to reverse it.
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Step-by-step guide to paying tax on rental income in Poland: ryczałt rates, registration, monthly payments via mikrorachunek, and PIT-28 filing.
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