Work out simple and compound interest on savings or a deposit.
🛠️ Free tool by the NayaPakistan team · Updated September 2026
This tool shows both simple interest — a flat percentage of the principal each year — and compound interest, where each period's interest is added to the balance so future interest is earned on interest too. Enter your principal, the annual rate, the number of years and how often interest compounds.
Compounding frequency matters: the more often interest is added (monthly rather than yearly), the faster a balance grows. Use this to compare a savings scheme, a term deposit or a National Savings certificate — though profit rates and tax on profit vary, so treat the result as an estimate.
Simple interest is charged only on the original principal each year. Compound interest is charged on the principal plus the interest already added, so it grows faster over time.
Maturity = P × (1 + r/n)^(n×t), where P is the principal, r the annual rate, n the compounding periods per year and t the years. The interest earned is that total minus the principal.
Yes. Monthly compounding earns slightly more than yearly compounding at the same rate, because interest is added — and starts earning — sooner.
Yes, banks and National Savings deduct withholding tax on profit, at a higher rate for non-filers. This calculator shows gross interest before any tax.