Polish salary calculator — gross to net 2026
Calculate net salary from gross for a Polish employment contract (2026): ZUS contributions, health contribution and PIT advance. Free, no signup.
Current for 2026Methodology →
Compound interest calculator
See how much you earn from compounding. Enter the principal, interest rate, period and compounding frequency.
Na tej stronie
How compound interest works
Interest accrues on the principal and on previously accrued interest. Formula: FV = P × (1 + r/n)^(n×t), where P is principal, r the annual rate, n compoundings per year, t years.
Example: PLN 10,000, 5%, 10 years
For PLN 10,000 at 5% per year with monthly compounding, after 10 years the capital grows to about PLN 16,470 — interest gained is about PLN 6,470.
Frequently asked questions
What is compound interest?
Interest earned on both the principal and previously accrued interest.
How do I calculate compound interest?
Formula: FV = P × (1 + r/n)^(n×t). The calculator above does it automatically.
How does it differ from simple interest?
Simple interest accrues only on the principal; compound also on the interest.
How does compounding frequency affect the result?
More frequent compounding (monthly) yields a higher final value than yearly at the same rate.
Is the Belka tax included?
Not in this version. A 19% Belka tax applies to gains — planned.
Can I add regular contributions?
Currently only the initial principal is used. Recurring deposits are planned.
Does the result account for inflation?
No, the result is nominal. Inflation reduces the real gain.
How fast will my capital double?
Rule of 72: years ≈ 72 / interest rate.
Is the result accurate?
Yes, it is exact math. The value is indicative — it depends on the offer and taxes.
What is this calculator for?
Estimating savings growth (deposit, account) from interest compounding over time.
The result is indicative and nominal (excludes the Belka tax and inflation). It is not investment advice.