Help
Kalkulator Podatkowy JDG compares the income tax forms of a Polish sole proprietorship (JDG) — the tax scale, the flat tax and the lump-sum tax — together with ZUS contributions, so you can see which form is the most favourable. The app is in Polish.
How it works
Enter your revenue and costs, choose your ZUS contributions (full, reduced or health contribution only, optionally with the contribution holiday), and the calculator works out every tax and contribution for each tax form — yearly or monthly, in a simple or a detailed view.
Accuracy
Calculations follow the 2025 regulations; the 2026 forecast is an estimate. Results are for guidance only and are not tax advice — for decisions about your business, consult an accountant or a tax adviser.
Privacy
The calculator works entirely offline and collects no data — see the privacy policy.
Contact
A question, a problem or an idea? Write to me.