💰Savings Calculators

Deposit and compound interest calculator — find out your real savings return

This wizard includes two savings calculators: a bank deposit calculator with automatic capital-gains tax deduction and a compound interest calculator with a choice of compounding frequency. Whether you are planning a short-term deposit or a long-term investment, you can quickly see how much you will actually earn by saving.

The deposit calculator helps you compare bank offers — just enter the amount, nominal interest rate, and term, and the tool shows you gross interest, the tax amount, and net profit. The compound interest calculator illustrates the power of regular saving and reinvesting returns over many years.

Full privacy — calculations run locally

Amounts, interest rates, and any other data you enter in the savings calculators are never sent to a server. All calculations — including the tax deduction and the capital growth schedule — run exclusively in your browser. The tool works without registration and without logging in.

Frequently asked questions

What is withholding tax on savings and how does it reduce deposit returns?

In many countries a capital-gains tax (e.g. 19% in Poland) is automatically deducted by the bank from deposit interest. If a deposit offers 5% gross, the real return after tax is only about 4.05%. The deposit calculator on this page computes the net amount after tax so you can see your actual earnings.

What is compound interest and why should I know about it?

Compound interest means that interest earned each period is added to the principal, and in subsequent periods that interest itself earns interest. The effect becomes especially visible over long investment horizons. The compound interest calculator shows capital growth year by year, taking into account the compounding frequency (monthly, quarterly, annually).

What is the difference between nominal and effective interest rates?

The nominal rate is the annual rate stated in the contract, without accounting for compounding frequency. The effective annual rate (EAR) incorporates the effect of compounding — the more frequently interest is added to the account, the higher the real return. The compound interest calculator displays both figures side by side.