Savings Calculator
Estimate deposit and installment-savings maturity values with interest method and tax mode.
Savings conditions
Enter only the amount and interest conditions needed for the selected savings mode.
10M KRW
Maturity estimate
Maturity amount, principal, interest, and tax are shown in order.
About Savings Calculator
The Savings Calculator is a free, browser-based tool that estimates the maturity value of a lump-sum deposit or a monthly installment savings plan. It runs entirely in your browser, so the amounts you enter never leave your device.
It is for anyone comparing Korean bank deposit and savings products before signing up. You choose lump-sum deposit or monthly installment mode, then enter the principal or monthly payment, the period in months, and the annual interest rate.
Pick simple or compound interest and an interest-tax mode (tax-free, the standard 15.4% Korean interest tax, or a custom rate). The calculator shows the maturity amount, principal paid, gross and after-tax interest, the tax amount, and an effective annualized return, all recalculated as you type.
Results are estimates for reference only and are not financial or tax advice. They exclude promotional rates, early-termination penalties, and bank-specific rounding, so confirm exact figures with your bank.
Frequently asked questions
- What is the difference between deposit and installment mode?
- Deposit mode assumes a single lump-sum principal left for the whole period, while installment mode assumes a fixed amount paid each month. Each mode applies the matching interest formula.
- Why does it use a 15.4% tax rate?
- Standard taxation uses South Korea's 15.4% interest-income tax. You can switch to tax-free or enter a custom rate if your account is taxed differently.
- Are my numbers sent anywhere?
- No. All calculations run locally in your browser, so the amounts and rates you enter are never uploaded or stored on a server.