Quick answer

The 30 April deadline has passed. A specific voluntary correction mechanism is still available — but it closes the moment the Urząd Skarbowy contacts you first. Interest is accruing daily from 30 April.

In this article

  1. What Czynny Żal Actually Does
  2. Common Errors After Missing the Deadline
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Missing the 30 April Polish tax deadline does not mean the situation is unresolvable. The Polish fiscal system has a formal voluntary correction mechanism — czynny żal — that allows you to file a late or corrected return before the tax authority identifies the issue and initiate proceedings. Used correctly, it significantly reduces penalties and in some cases eliminates them entirely. Used too late, it is unavailable.

The distinction is simple: you acting first versus them acting first. Everything that follows depends on which happens first.

What Czynny Żal Actually Does

Common Errors After Missing the Deadline

Waiting to see if the Urząd Skarbowy notices. They will. The cross-referencing system is automated. The question is not whether they will find it — it is whether you act before they do. The voluntary correction window is open now. Do not wait.
Assuming the penalty and the interest are the same thing. They are not. Interest at the statutory rate accrues from 30 April regardless of voluntary correction. Czynny żal addresses the separate penalty — which can be 30–a specific penalty rate of the understated tax. Both apply independently.
Filing the korekta without the czynny żal notification. A corrected return without the formal voluntary notification does not attract the same penalty protection. Both must be submitted together — or the czynny żal immediately before the corrected return.
Not paying the tax and interest at the time of filing. Voluntary correction requires filing and payment. A czynny żal notification without the accompanying payment is incomplete and does not fully activate the penalty protection.
Seeking advice from HR rather than a tax professional. HR departments are not qualified to advise on voluntary correction procedures, penalty exposure, or whether proceedings have been initiated. A Polish tax adviser (doradca podatkowy) or accountant (księgowy) is the correct resource — cost a fine–800 for a standard late filing correction.

Avoid interest at the statutory rate per annum from 30 April 2026, plus a late filing ... The Personal Taxes and Legal Requirements Guide covers the complete sequence for your situation in Kraków.