Deposit Calculator
Our free deposit calculator shows how your savings grow over time. Enter the initial amount, annual interest rate and term — choose compounding frequency (monthly, quarterly, annually or none) to see the final balance and a year-by-year or month-by-month breakdown.
Frequently Asked Questions
What is compound interest (compounding)?
Compounding means the interest earned each period is added to the principal, so future interest is calculated on a larger balance. For example, with monthly compounding at 12% per year, each month earns 1% on the growing total — resulting in more than 12% effective annual return.
What is the difference between simple and compound interest?
Simple interest (no compounding) is calculated only on the original principal: Interest = Principal × Rate × Time. Compound interest adds earned interest back to the principal, so the balance grows exponentially over time. The longer the term, the larger the difference.
Which compounding frequency is most profitable?
The more frequently interest is compounded, the higher the final amount. Monthly compounding yields slightly more than quarterly, which yields more than annual. The difference becomes significant over long terms (5+ years) or at high interest rates.
How is the annual effective rate calculated?
The effective annual rate (EAR) accounts for compounding: EAR = (1 + r/n)ⁿ − 1, where r is the nominal annual rate and n is the number of compounding periods per year. For example, 12% compounded monthly gives an effective rate of about 12.68%.
Can I use this calculator for any currency?
Yes. The calculator supports RUB, USD, EUR, UAH and PLN. The calculation logic is identical for all currencies — only the display symbol changes. Select your preferred currency in the initial deposit field.