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Top tools
Mikrorachunek Checker
Check whether a mikrorachunek podatkowy number matches the official format and extract the embedded PESEL or NIP.
REGON Number Generator
Generate valid 9-digit and 14-digit Polish REGON numbers with correct check digits for testing.
Polish ID Number Generator
Generate valid Polish ID card (dowód osobisty) numbers with correct check digits. Each number follows the official series-and-number format used on Poland's national identity card.
Top articles
How to Find Your Bank's SWIFT/BIC Code
Find your bank's SWIFT/BIC code in 4 ways — bank app, statement, online lookup, or extract it from any IBAN. Includes codes for Revolut, Wise, N26, PayPal & more.
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PIT, CIT, and VAT go through your mikrorachunek. PCC, property tax, and local fees do not. Here is the full breakdown for taxpayers in Poland.
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Learn when you're legally required to share your PESEL number in Poland and when you can refuse under RODO (GDPR). A foreigner's guide to data protection.
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