The Polish tax return deadline is 30 April 2026. It is fixed. There is no general extension, no grace period for foreigners, and no automatic exemption for people who arrived mid-year. If you are a Polish tax resident — which most foreigners living and working in Kraków are — you have an obligation to file or approve a return by that date. You have 10 days.
The government's Twój e-PIT portal has already pre-filled a return for most employed foreigners. That return may look complete. It may even show a refund. But pre-filled does not mean correct — and approving an incorrect return is still your legal responsibility, regardless of how the error got there.
The Deadline — What It Covers and Who It Applies To
| Situation | Deadline | What Applies |
|---|---|---|
| Employed in Poland, single employer, no other income | 30 April 2026 | PIT-37 — pre-filled in Twój e-PIT, approve or amend |
| Self-employed JDG — general scale or flat tax | 30 April 2026 | PIT-36 or PIT-36L — not pre-filled, must file manually |
| Self-employed JDG — lump sum (ryczałt) | 30 April 2026 | PIT-28 — not pre-filled, must file manually |
| Foreign income, freelance, or multiple sources | 30 April 2026 | PIT-36 — pre-fill is incomplete, must amend before approving |
| Capital gains from shares or property sale | 30 April 2026 | PIT-38 or PIT-39 — separate return, not in standard pre-fill |
| No action taken by 30 April | 30 April 2026 | Pre-filled return auto-approved — if incorrect, you are liable |
The Twój e-PIT portal is at podatki.gov.pl. Log in using your Profil Zaufany or Polish bank authentication. Your pre-filled return is waiting there now. Do not leave it until 29 April — the portal experiences high load in the final days and technical issues do not constitute a valid reason for late filing.
If you do not have a Profil Zaufany yet, create one immediately via your Polish bank's online platform — PKO BP, ING, Santander, mBank and Pekao all support it. The process takes 10 minutes. Without it you cannot access the portal electronically and will need to file a paper return at your local Urząd Skarbowy before 30 April.
Not certain which form applies to your situation?
Chapter 1 of the Personal Taxes and Legal Requirements Guide covers tax residency determination and identifies exactly which form applies to every income situation — including mid-year arrivals, remote workers, and those with income from multiple countries.
Personal Taxes and Legal Requirements Guide →What the Portal Does and Does Not Know About You
The Twój e-PIT system builds your pre-filled return from two sources: your employer's annual PIT-11 declaration and data from the Polish tax authority's records. It knows what your Polish employer paid you, what tax was withheld, and what ZUS contributions were made on your behalf. That is all it knows.
It has no visibility of anything outside that scope. The following are among the situations where the pre-filled return will be incomplete or incorrect — and where approving it without amendment creates a compliance problem:
Foreign salary or remote work income — if you work for a non-Polish employer while living in Poland, that income does not appear in the portal. Polish tax residency means worldwide income is taxable. The portal shows none of it.
Freelance or consultancy income — payments from clients outside the Polish payroll system are invisible to the portal regardless of the amount or the client's location.
Mid-year arrival — if you arrived in Poland part-way through 2025, your residency status for the partial year affects which income must be declared. The portal does not account for this automatically.
Change of employer during the year — if you changed jobs in 2025, the portal may only show one employer's data. The second employer's PIT-11 may not have been linked correctly.
Rental income from Polish property — not captured in the standard pre-fill regardless of whether you declared it in prior years.
Deductions you are entitled to claim — internet costs, pension contributions, charitable donations, child relief. The portal does not know about these unless they were declared in a prior year return. They do not appear automatically.
Legal Warning: The portal will not flag this error. You are legally responsible for correcting it before the Urąd Skarbowy identifies the discrepancy. Chapter 2 of the Personal Taxes and Legal Requirements Guide is the only self-help resolution for this position.
Approving the pre-filled return when any of the above apply to your situation means filing an incorrect return. You are legally responsible for the accuracy of your return regardless of how it was populated. The Urząd Skarbowy does not treat "the portal filled it in" as a mitigating factor.
Does any of the above apply to your situation?
Chapter 2 of the Personal Taxes and Legal Requirements Guide covers how to identify what your pre-filled return is missing, which income sources must be added, and the exact amendment process in the portal before you submit.
Personal Taxes and Legal Requirements Guide →The Penalties for Getting It Wrong
Missing the 30 April deadline or filing an incorrect return both generate financial consequences. Understanding the penalty structure is useful — not to frighten, but because it directly affects what action you should take in the next 10 days.
| Situation | Consequence | Mitigation |
|---|---|---|
| Late filing — return submitted after 30 April | Interest on any unpaid tax from 30 April at the statutory rate (currently 14.5% per annum) | File as soon as possible — interest stops accruing on the date of submission |
| Incorrect return — understated income | Penalty of 75% of the understated tax amount in cases of deliberate evasion — 30% in standard cases | Voluntary correction (korekta) before the authority identifies the error eliminates or significantly reduces the penalty |
| No return filed, no action taken | Authority issues an assessment — tax plus interest plus penalty. No voluntary correction available at this stage. | File before 30 April. Even an approximate return is better than no return. |
| Voluntary correction (korekta) submitted | Penalty significantly reduced or eliminated — tax and interest still due but no additional sanction | Submit the correction before the Urząd Skarbowy contacts you — this is the critical timing point |
The voluntary correction mechanism is significant. If you file by 30 April and subsequently realise the return was incorrect, submitting a korekta promptly — before the tax authority identifies the discrepancy — is treated very differently from an error discovered during an audit. The window to act voluntarily closes the moment you receive correspondence from the Urząd Skarbowy about that tax year.
Filing a return with a known error and hoping it is not noticed is not a strategy. The Urząd Skarbowy cross-references bank statements, employer declarations, ZUS records, and increasingly, foreign tax authority data under international exchange of information agreements. Discrepancies surface — typically 12 to 24 months after the filing year.
Not sure whether your situation requires a correction?
Chapter 3 of the Personal Taxes and Legal Requirements Guide covers the correction process in full — when it protects you, how to submit it, and the specific situations where filing now and correcting later is the right approach versus amending before submission.
Personal Taxes and Legal Requirements Guide →Three Questions to Ask Before You Click Submit
Before approving anything in the portal, answer these three questions honestly. If the answer to any of them is yes, the pre-filled return requires review before submission.
If yes, you are a Polish tax resident and your worldwide income is taxable in Poland — not just your Polish salary. The portal shows only Polish-source income. Any foreign salary, investment income, rental income from abroad, or freelance earnings must be declared. The portal does not know about any of it.
⚠ Legal Warning: The portal will not flag this error. You are legally responsible for correcting it before the Urząd Skarbowy identifies the discrepancy. Chapter 4 of the Personal Taxes and Legal Requirements Guide is the only self-help resolution for this position.
Foreign salary paid into a non-Polish account, freelance invoices, consultancy fees, rental income, dividends — none of these appear in the pre-fill. If you received income from any source other than a Polish employer running a Polish payroll, the pre-filled return is incomplete by definition.
⚠ Legal Warning: The portal will not flag this error. You are legally responsible for correcting it before the Urząd Skarbowy identifies the discrepancy. Chapter 4 of the Personal Taxes and Legal Requirements Guide is the only self-help resolution for this position.
Mid-year arrival creates a partial-year residency question. Your tax position for the period before arrival — and whether income earned in that period must be declared in Poland — depends on your specific circumstances, the country you arrived from, and whether a double taxation treaty applies. The portal does not account for any of this.
⚠ Legal Warning: The portal will not flag this error. You are legally responsible for correcting it before the Urząd Skarbowy identifies the discrepancy. Chapter 4 of the Personal Taxes and Legal Requirements Guide is the only self-help resolution for this position.
You were in Poland the full year, employed by a single Polish employer, with no other income sources. Your pre-filled return is likely correct. Log in to podatki.gov.pl, verify the figures against your PIT-11 document from your employer, and approve. You are in the straightforward category.
Answered yes to any of the three?
Chapter 4 of the Personal Taxes and Legal Requirements Guide covers tax residency determination and the exact income declaration requirements for each situation — mid-year arrivals, remote workers, dual-country income, and double taxation treaty application.
Personal Taxes and Legal Requirements Guide →What Happens After You Submit
Download your UPO immediately. The Urzędowe Potwierdzenie Odbioru (UPO) is your official proof of submission. It is generated the moment you submit and is available to download from the portal. Save it. This is your legal evidence that you filed on time. If you lose it and a dispute arises later about whether you filed before the deadline, regenerating it is not straightforward.
Tax refunds are processed within 45 days of submission to the Polish bank account registered in the portal. If no Polish bank account is registered, refunds are sent by postal order — significantly slower. Log in to the portal settings and confirm your IBAN is registered before submitting. A refund due to you sitting in a processing queue for an extra 6 weeks because the account was not registered is an avoidable delay.
If you owe tax — payment is due by 30 April, not at a later date. The return and the payment are separate actions. Submitting the return on time does not give you additional time to pay. If you cannot pay in full by 30 April, file the return on time regardless — late filing plus late payment is worse than late payment alone. Interest on the outstanding amount runs from 30 April but the penalty structure for non-filing is significantly more serious than for late payment.
If the Urząd Skarbowy has questions — correspondence arrives by post to your registered address. This is one of several reasons why your registered address in the Polish population register must be current. A decision letter or query sent to an old address that you do not receive does not pause the response deadline. The clock runs from the date of issue, not the date you read it.
Common Errors Foreigners Make at This Stage
You have 10 days. The portal is open. If your situation is straightforward — one Polish employer, no other income, full year in Poland — approve the pre-filled return and move on. If anything in this article gave you pause, the Personal Taxes and Legal Requirements Guide covers your exact position. It is the document you work through before you click Submit, not after.
The Guide covers tax residency determination, every PIT form type with worked examples, how to identify what your pre-fill is missing, the amendment process step by step, double taxation treaty application, ZUS obligations, available deductions, and the correction process if you need it after filing.