PIT Tax Return in Poland: Filing PIT-37 Guide
Learn how to file your annual tax return, use the Twój e-PIT portal, apply tax reliefs, and get refunds.
Filing a yearly tax return (PIT) is a key financial duty for everyone earning income in Poland, including foreign residents and workers. The most common tax return form is the PIT-37, which is used by employees, contractors, and individuals who receive their income exclusively through Polish employers (documented on a PIT-11 form). The Polish tax year runs parallel to the calendar year, and the deadline for filing your PIT-37 tax return is strictly April 30th of the following year.
The Polish Ministry of Finance has simplified this process significantly through the 'Twój e-PIT' electronic system. This online platform automatically generates a pre-filled tax return based on the data submitted by your employer. Taxpayers can log into the government tax portal, review the pre-filled form, apply any eligible tax deductions, and submit the return digitally. Eligible tax relief deductions include child relief (ulga na dziecko), internet relief, public transport donations, and thermo-modernization reliefs.
Submitting your PIT return electronically not only reduces errors but also speeds up tax refunds. By law, refunds for returns submitted online must be processed within 45 days, compared to up to 90 days for paper-based submissions. If your return shows that you owe tax, you must transfer the outstanding amount to your individual tax bank account (Mikrorachunek podatkowy) by the April 30th deadline to avoid interest charges.
📋 Steps to File Your PIT-37
- 1
Receive PIT-11 from employer
Obtain form PIT-11 from your employer by the end of February. This contains details of your annual income and taxes.
- 2
Log into the tax portal
Access the official 'Twój e-PIT' system using your Profil Zaufany, e-dowód, or bank login details.
- 3
Verify pre-filled return
Check the automatically generated PIT-37 form against the income details provided in your PIT-11 document.
- 4
Apply tax deductions
Add any eligible tax reliefs, such as child relief, internet relief, or rehabilitation deductions, to lower your tax liability.
- 5
Submit the return
Approve and submit your tax return electronically on the portal to generate an official receipt confirmation (UPO).
- 6
Settle payments or refunds
Pay any outstanding tax to your individual tax account (Mikrorachunek) or wait for your refund to be deposited.
✅ Documents Required for PIT
- ▸PIT-11 statement received from your employer
- ▸Valid passport or national identification card
- ▸PESEL or NIP number (used as tax identifier)
- ▸Receipts or invoices for internet expenses (for internet relief)
- ▸Children's birth certificates (for child tax relief)
- ▸Individual tax bank account number (Mikrorachunek podatkowy)
- ▸Official receipt confirmation (UPO) after online submission
⚠️ Common Tax Filing Mistakes
- ✕Filing late after the April 30th deadline, which triggers penalty interest and requires submitting a formal explanation (czynny żal)
- ✕Failing to download the official receipt confirmation (UPO), which is your only legal proof that the return was successfully filed
- ✕Claiming tax reliefs without having valid receipts or invoices to prove the expenditures during potential tax office audits
- ✕Entering incorrect bank account details for refunds, causing significant payment delays and administrative issues
💶 Filing Fees and Deadlines
Filing your annual PIT-37 return is completely free of charge (0 PLN fee, estimated for 2026). If you owe tax, the amount must be paid by April 30th. Digital refunds are processed within 45 days, while paper refunds can take up to 90 days. Please verify detailed guidelines on the official website of the tax office.
📖 Useful Tax Vocabulary
- PIT-37
- Standard annual tax return form for employees
- Urząd Skarbowy
- Tax Office / Tax Administration
- PIT-11
- Annual income statement from employer
- ulga podatkowa
- Tax relief / deduction
- UPO
- Official confirmation of receipt for submitted tax return
- mikrorachunek podatkowy
- Individual tax bank account for payments
- zwrot podatku
- Tax refund
- zeznanie podatkowe
- Tax declaration / return
❓ Frequently Asked Questions
What is PIT-11?+
It is the annual income statement issued by your employer showing your gross earnings, social contributions, and tax advances.
What is Twój e-PIT?+
It is the official government online portal where pre-filled tax returns are automatically prepared for taxpayers in Poland.
Can I file tax returns together with my spouse?+
Yes, joint filing is allowed in Poland if you are married for the full tax year, which can often result in lower overall tax.
What is a Mikrorachunek podatkowy?+
It is your unique, personal tax bank account assigned by the government. You must use it to pay any tax you owe to the state.
What happens if I don't file the tax return?+
If you do not submit your PIT on time, the tax office may automatically accept the pre-filled version, but you might miss out on deductions.
Can foreigners claim the child tax relief?+
Yes. Foreigners who are Polish tax residents and have children can claim the child relief (ulga na dziecko) on their PIT-37.
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