Skip to content
Księgowość.pro logo

← Calculators

Flat tax calculator (B2B)

Fixed 19 % rate. Rates as of 2026-01-01.

Your details (monthly)

Monthly result

Take-home (net)

PLN 15,462.62

Effective rate: 26.15 %

Income
PLN 20,073.24
ZUS social contributions
− PLN 1,926.76
Health contribution (4.9 %)
− PLN 983.59
Tax 19 %
− PLN 3,627.03
Annual tax
PLN 43,524.40

Indicative result, assuming even income across the year. Not tax advice.

Frequently asked questions

When does the flat tax pay off?
A fixed 19 % rate with no bands pays off at higher incomes, usually above roughly 150–200 thousand PLN a year, when the tax scale pushes you into the 32 % band. The downside: no tax-free amount, no joint filing with a spouse and no access to most reliefs.
How is the health contribution calculated on the flat tax?
The contribution is 4.9 % of income (subject to a minimum). Part of the health contribution paid can be deducted from income up to an annual limit, and the calculator takes this into account.
Flat tax or tax scale: how do I choose?
It depends on your income, family situation and reliefs. Work out both in our calculators, and for an exact comparison for your business, get in touch with us.

Want to compare the flat tax, tax scale and lump sum for your business?

Contact us
Zadzwoń