Format guidance · Verified checks when available
Poland TIN validator
Review the expected Poland NIP / PESELstructure before you save it, send it to an API, or include it in a tax workflow. Interactive validation appears only after this country's rules pass authoritative-source verification.
Private by design
Transient validation, no public history
TINs are sent securely to the canonical validation API, processed in real time, and not persistently stored by the public checker.
How Poland tax IDs are formatted
In Poland, the tax identifier is commonly known as Numer Identyfikacji Podatkowej / PESEL (NIP / PESEL). The expected format is NIP: 10 digits (XXX-XXX-XX-XX), PESEL: 11 digits. Teams usually need a Poland NIP / PESEL check around tax filing, business registration, employment, or before a record moves into billing, onboarding, or compliance review.
Valid examples
123-456-32-1844051401359
Invalid examples
- 123-456-32-19 (Invalid checksum)
- 4405140135 (Too short)
What this page covers
Format details below are guidance from public sources. Automated pass/fail results are offered only when the backend catalog marks this country as verified syntax.
Format and length
Confirms the number follows the expected Poland pattern: NIP: 10 digits (XXX-XXX-XX-XX), PESEL: 11 digits.
Useful examples
Shows valid and invalid-looking samples so you can compare spacing, separators, letters, and digit counts before submitting real data.
When people usually check this number
- Tax filing
- Business registration
- Employment
- Social security
A format match does not prove that a Poland tax ID belongs to a specific person or business. Use the result as a first-pass data quality check, then confirm sensitive cases with official records.
Official source: Krajowa Administracja Skarbowa
Last reviewed: May 23, 2026. We update country guidance when public format rules change.
How to check a Poland NIP / PESEL
Use this check before a record reaches billing, tax reporting, or manual review.
Enter the NIP / PESEL
Paste or type the Poland tax identifier exactly as it appears in your source record. Spaces and separators are fine when they are part of the expected format.
Review the format result
Check whether the number matches the Poland syntax currently implemented here. The result does not query a tax-authority registry or confirm ownership.
Confirm important records
For onboarding, tax reporting, or compliance work, treat the result as a data-quality signal and confirm high-risk records with Krajowa Administracja Skarbowa or your internal process.
Frequently asked questions
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