Savings Calculator
How much will you have if you save every month? Get your maturity amount — gross interest, tax taken out, net in hand — in seconds. Works in any currency.
Interest method
Maturity amount (net in hand)
Some values were above the allowed range and were capped for this calculation.
Deposits are assumed at the start of each month (annuity-due), interest compounds monthly.
Every calculation runs in your browser — nothing is sent to a server.
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Simple vs compound interest — what changes when you deposit monthly?
With simple interest every deposit earns the same flat rate until maturity, so this savings calculator just adds up each month's interest. With monthly compound interest, the interest you have already earned itself earns interest, so later months grow faster. On a monthly deposit plan the gap stays small for short terms and widens over years — this compound interest calculator shows both side by side so you can see the exact difference.
Why does after-tax interest differ from country to country?
Most countries tax the interest your savings earn, and the rate varies. In Korea, for example, savings interest is taxed at 15.4% (14% income tax plus a 1.4% local surtax), while other countries use different rates or tax-free allowances. Because rates differ, this savings calculator lets you type any tax rate — use 0% for a tax-free account or the 15.4% preset for a Korean deposit — and shows the tax withheld and the net interest you actually keep.
Why might my bank statement differ slightly from this calculator?
This recurring deposit calculator assumes deposits on the first of each month, monthly compounding, and whole-number rounding. Real banks may use daily day-count, credit interest on the exact date each deposit lands, apply their own rounding, or pay interest only at maturity. Those small differences can shift the final figure a little, so treat this as a close estimate rather than a to-the-cent quote.
Does this tool assume deposits at the start or end of the month?
It assumes each deposit is made at the start of the month (an annuity-due), so every deposit earns one extra period of interest compared with end-of-month timing. If your real plan deposits at the end of the month you will earn slightly less than shown. Depositing earlier in the cycle is one simple way to squeeze a little more interest out of the same monthly deposit interest calculator plan.
Lump sum vs monthly deposits at the same rate — which earns more?
A single lump sum left for the whole term earns more interest than the same total split into monthly deposits, because the lump sum is invested for longer. In this savings calculator you can model a lump sum by putting it in the starting balance, a savings plan by using the monthly deposit, or combine both to compare them on one screen.