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Capital Gains Tax Calculator (Polish Belka Tax)

Enter the proceeds from selling securities, their acquisition cost and any commissions, and the calculator returns your gain, the 19% Belka tax due and the net gain you keep after taxation.

Reviewed byRedakcja Liczbnik
Calculator
ResultBelka tax 19%570.00PLN
Gain before tax
3,000.00 PLN
Net gain after tax
2,430.00 PLN

How we calculate the Belka tax

Gain = sale proceeds - acquisition cost - commissions (never below 0). Tax = gain * 19%. Net gain = gain - tax. If costs exceed proceeds, the result is a loss and the tax is 0 PLN.

Example: proceeds 10,000 PLN, cost 7,000 PLN

You sell shares for 10,000 PLN that you bought for 7,000 PLN, with no extra commissions. The gain is 10,000 - 7,000 = 3,000 PLN. Belka tax: 3,000 * 19% = 570 PLN. Net gain after tax is 3,000 - 570 = 2,430 PLN.

Frequently asked questions

What is the Belka tax?

The Belka tax is the colloquial name for the 19% tax on capital gains in Poland. It covers gains from selling shares, bonds and fund units, as well as interest on deposits. The 19% rate is flat regardless of income level.

How do I calculate tax on selling shares?

First compute income as proceeds minus acquisition costs and commissions. Then multiply income by 19%. The calculator does this automatically: gain = proceeds - cost - commissions, and tax = gain * 19%.

What counts as cost of obtaining income?

Primarily the purchase price of the securities plus brokerage commissions and fees on both buying and selling. For funds, handling fees also count. Costs lower the tax base, so document them carefully.

What happens if I make a loss?

When costs exceed proceeds, the tax is 0 PLN. A loss can be settled on the PIT-38 form and offset against income from the same source over the next five years, up to 50% of the loss per year.

Which form is used for capital gains?

Gains from selling shares and bonds are settled on the PIT-38 form by 30 April. The basis is the PIT-8C information from brokerage houses. These gains are not combined with income taxed under the scale.

Does the broker withhold the tax automatically?

For interest on deposits the payer withholds the tax. However, for selling shares on a brokerage account the taxpayer settles via PIT-38, and the broker only issues a PIT-8C statement.

Indicative result

The result is indicative and is not tax advice. It applies the 19% rate (Belka tax) under 2026 rules. Losses are settled on the PIT-38 form; consult a tax adviser if in doubt. Rates: PIT Act · as of 09.06.2026.
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