Calculate loan installments, creditworthiness, taxes, contributions, leasing, inflation and interest. Financial calculators help you quickly compare options and estimate costs before making decisions.
Read guides related to calculators in the areas of law, finance, employment and real estate.
Browse legal specializations related to the most common user cases.
Law firms directory →Compare accounting firms and services useful after calculating taxes, contributions, business costs and salaries.
Odpowiedzi na najczęstsze pytania dotyczące kalkulatorów z kategorii Finance.
APR (Annual Percentage Rate / RRSO) is the total annual cost of a loan — including interest, fees, insurance and other charges. The lower the APR, the cheaper the loan. Always compare APR, not just the nominal interest rate.
The instalment depends on loan amount, term, interest rate, and instalment type (fixed or decreasing). Decreasing instalments cost less in total interest but start higher. The mortgage calculator shows the full repayment schedule and total cost.
It depends on your tax form: general rules — 9% of income; flat tax — 4.9% of income (min. PLN 314.10); lump-sum — a fixed amount based on one of 3 revenue tiers. The contribution calculator shows the exact figure.
Lump-sum tax is calculated on revenue (not profit), at a rate depending on business type: 2%, 3%, 5.5%, 8.5%, 10%, 12%, 12.5%, 15% or 17%. The calculator shows tax and ZUS contributions together.
Decreasing instalments mean lower total interest, but higher initial payments. Fixed instalments give a stable monthly budget. The loan calculator lets you compare both options and see the cost difference side by side.
Overpayment shortens the loan term or reduces your instalment — both reduce total cost. The overpayment calculator shows how much you save and how your schedule or instalments change.
Note: banks and offers vary
Some calculators in this category (loan, leasing) are indicative. Interest, fees, insurance and APRC depend on the specific bank or leasing company — each institution has different terms. The result is for estimation; check the actual offer with your chosen bank or lessor.
Tax interest calculator — arrears interest
Tax interest — calculator
ZUS interest calculator
ZUS interest — calculator
PCC calculator — civil transaction tax
PCC — contracts, loans, sales
Linear tax 19% calculator
Linear 19% tax for sole proprietors
APR (RRSO) calculator — compare loan cost
Estimate APR and fuller loan cost
Lump‑sum tax calculator — rates & advances
Lump‑sum on revenue — quick simulation
Health contribution calculator — sole prop, flat tax
Health contribution 4.9% and 9% — sole proprietorship
VAT net‑gross calculator
VAT net-gross and gross-net conversion
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