Savings Calculator
Enter your monthly deposit, period and annual rate to get simple or monthly-compound interest and the after-tax payout in real time. All calculations run in your browser.
Enter the amount, period and rate to see the result.
How to use
- Enter the monthly deposit, period (months) and annual rate.
- Choose simple/monthly compound and the tax type.
- The after-tax payout, total principal, pre-tax interest and tax appear in real time.
Frequently asked questions
What is the difference between simple and monthly compound interest?
Simple interest accrues only on the principal, while monthly compound interest also accrues on the interest added each month. Most Korean installment savings products use simple interest.
How much is the interest income tax?
In South Korea, standard tax is 15.4% of interest (14% income tax + 1.4% local income tax), preferential is 9.5%, and tax-free products pay none. For other countries, choose Custom tax rate and enter your own.
When are deposits assumed to be made?
Deposits are assumed at the start of each month (annuity due). Actual products may differ slightly depending on how they calculate interest.