Poland's 9% health premium: a deduction from pay, not from tax

Polish payroll runs two deductions off gross pay before tax is calculated: ZUS social contributions (13.71%, covering pension, disability and sickness insurance) come off first, then the 9% health premium is charged on what remains. Both look like ordinary payroll deductions, but they are treated very differently by the tax that follows.

ZUS contributions reduce the base PIT is calculated on — a normal "deduct before tax" arrangement, the same shape as a pension contribution in most countries. The health premium does not: before 2022 it was even partly creditable against the tax bill itself (a credit, not just a deduction), but the Polski Ład reform removed that offset entirely. The 9% now simply leaves the payslip with no tax relief attached, which is why two workers with the same gross pay in different years — pre- and post-2022 — end up with meaningfully different net pay for the same nominal contribution rate.

The practical effect shows up most clearly for higher earners and the self-employed, for whom the health premium is calculated differently but is equally non-deductible — it is one of the more commonly cited reasons Poland's effective tax-and-contribution wedge is harder to predict from the headline 12%/32% PIT rates alone.