See how much your savings grow with regular deposits and compound interest.
This calculator adds your monthly deposits to an initial amount and grows the balance with the annual rate you enter. Compound interest earns interest on past interest; simple interest does not. You can also apply an interest tax to estimate the after-tax amount.
A one-time deposit grows only on itself, while adding a fixed amount every month keeps feeding the balance and multiplies the effect of compounding. Try setting the monthly deposit to zero to see a pure lump-sum result, then add a monthly amount to compare.
The more often interest is added, the more you earn, because each new interest amount starts earning interest sooner. Monthly compounding usually beats annual compounding at the same nominal rate, though the difference is small at low rates.
Interest is often taxable, so the after-tax figure is what actually lands in your account. This tool estimates it with a flat rate; real rules can include allowances, tiers and timing that vary by country, so treat the result as a planning estimate.
CalcBloom compounds your balance period by period in your browser, adds any regular deposit, and applies your interest-tax rate to the interest earned. It is an estimate: real accounts differ in compounding frequency, tax allowances, tiered rates and timing. Nothing you enter leaves your device.
Last reviewed: 2026-07
It is interest calculated on both your deposits and the interest already earned, so the balance grows faster over time.
It depends on your country. In Korea, interest income is commonly taxed at 15.4%. Leave the tax off if you only want the pre-tax amount.
No. Everything is calculated locally in your browser and nothing is uploaded.
Yes. Enter an initial amount, a monthly deposit, or both. Set either to zero to model just one of them.
Deposits are added at the start of each period and then grow, which matches how most regular savings plans work.
Yes. Set the monthly deposit to zero and it becomes a lump-sum fixed deposit calculation.