The 19 % flat tax in Poland in 2026: when it beats the tax scale

Tax scale or flat tax: take-home at five revenue levels

The table assumes no costs, full ZUS without voluntary sickness cover, and an average across the year. The difference column shows how much more (plus) or less (minus) the flat tax leaves you each month.

At PLN 10,000 the scale wins clearly. It benefits from the tax-reducing amount, which the flat tax does not have, and from the low 12 % first-bracket rate. Around PLN 14,600 the balance tips, and the higher you go, the faster the flat tax pulls ahead. Above roughly PLN 10,000 of monthly profit, part of your annual income on the scale falls into the 32 % band, while the flat tax stays at 19 %.

The 4.9 % health contribution and its floor

The flat-tax health contribution is lower in percentage terms than on the scale (9 %), but it has a floor of PLN 432.54 a month. The 4.9 % rate only beats the floor once income passes PLN 8,827 a month. Below that you pay a fixed sum, so the effective rate is higher: on PLN 6,000 of revenue with no costs it is about 10.3 % of income.

The health contribution year runs from February to January. That is why the January 2026 minimum is still PLN 314.96 and the February minimum PLN 432.54. For simplicity, our calculator applies the February minimum to the whole year, which on a low income overstates annual health by the difference for one month.

The PLN 14,100 deduction cap

On the flat tax you deduct the health contribution you paid from income, but no more than PLN 14,100 in total per year. The largest possible tax saving is therefore PLN 2,679 a year. On PLN 20,000 of revenue with no costs, health comes to PLN 892.37 a month and fits inside the cap. On PLN 30,000 it is PLN 1,382.37, and only PLN 1,175.00 a month is deductible, which is the cap split over twelve months.

The cap starts to trim the deduction at around PLN 25,800 of monthly revenue. Above that, the health contribution is a pure cost with no relief at all. It does not change the overall picture, though: at that level, the flat tax still leaves clearly more than the scale.

What the flat tax does not offer

There is no tax-free allowance and no PLN 3,600 annual tax-reducing amount. There is no second bracket, but there is no low 12 % rate either: every zloty of profit, including the first, pays 19 %. The youth relief covers income from employment and mandate contracts, not from a business, so a twenty-year-old with a sole proprietorship on the flat tax pays tax from the first zloty.

All of this makes the flat tax a form for people whose profit is reliably high. In a weaker year, with revenue of a few thousand zloty a month, you pay more on the flat tax than you would on the scale, and in two places at once: in tax, and in a health contribution stuck at its floor.

Costs move the break-even point

The table compares revenue without costs. Costs reduce profit under both forms at the same time, so it is profit that decides. With PLN 20,000 of revenue and PLN 6,000 of monthly costs, the scale leaves PLN 9,505 and the flat tax PLN 9,407. If you carry large costs, such as a car lease and office rent, the flat tax may start paying off later than your invoiced revenue suggests.

If your costs are low, compare the flat tax with the lump sum as well: working from home with little spending, the 12 % lump sum often leaves more. The B2B calculator shows all three forms side by side, and our guide to the lump-sum tax explains how it works.

What each extra thousand is worth

Averages hide something important: how much of the next invoice you keep. At PLN 8,000 of revenue, an extra PLN 1,000 leaves PLN 790 on the scale and PLN 810 on the flat tax. At PLN 20,000 the order flips: on the scale you keep PLN 590 of the thousand, on the flat tax PLN 770. On the scale, every zloty above the threshold pays 32 % tax plus 9 % health; on the flat tax, 19 % plus 4.9 %.

That marginal view helps when you negotiate a rate. If you are weighing an extra project worth a few thousand zloty a month, work out what you would keep under your tax form, not at your average rate for the year.

The flat tax on preferential ZUS

Your ZUS option does not change the rules of the flat tax, but it does change the numbers. With PLN 15,000 of revenue on preferential ZUS, tax is PLN 2,634 a month and health PLN 714.38, against PLN 2,387 and PLN 647.37 on full ZUS. Lower social contributions mean higher profit, so both tax and health go up. Take-home is still higher: PLN 11,230 instead of PLN 10,177. The contribution options are covered in our guide to ZUS for the self-employed.

Checking your monthly advance yourself

Nobody gives you a payslip on the flat tax, so you or your accountant (biuro rachunkowe) work out the monthly advance. The pattern never changes: revenue minus costs minus social contributions minus the deductible part of health, multiplied by 19 %. On PLN 20,000 of revenue with no costs, the base is about PLN 17,319 and the tax PLN 3,291 a month. If your advance is hundreds of zloty off that figure, first check whether health is being deducted beyond the cap.

Common mistakes when choosing the flat tax

Choosing it "because 19 % is less than 32 %", although on a moderate profit you never reach the second bracket. Deducting the whole health contribution regardless of the PLN 14,100 cap. Assuming 4.9 % health is always lower than 9 %, despite the PLN 432.54 floor. Leaving costs out when comparing with the scale.