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Savings interest calculator

Estimate savings with monthly deposits, simple or compound interest and a custom tax rate.

Use 0% for a before-tax estimate.
More options

These results use the example values shown above.

Estimated final balance
12,380,219 KRW
Total deposits11,800,000 KRW
Interest before tax580,219 KRW
Tax on interest0 KRW
Interest after tax580,219 KRW

End-of-month deposits · Monthly compound interest · monthly calculation · interest taxed once at maturity

Suggest improvements

This is a fixed-rate monthly estimate. Actual deposit products may use daily accrual or different tax and payment rules.

How to use Savings interest calculator

Enter a starting balance and monthly deposit in KRW, annual interest rate and number of months.

More options lets you choose simple interest or monthly compounding and deposits at the start or end of each month. Tax is applied once to interest at maturity.

Example
At 0% interest, a 1,000,000 KRW opening balance plus 300,000 KRW each month for 12 months gives 4,600,000 KRW.

Frequently asked questions

Can I calculate before tax?

Set the interest tax rate to 0%.

Does this forecast returns?

No. It calculates only the interest rate and deposits you enter.

Reviewed: 2026-10-04 · Report an issue