Installment Savings Calculator
Calculate maturity amount for regular monthly deposits
Input
Each payment uses simple interest for its remaining term; product rounding may differ.
Result
- Net Maturity Amount
- ₩6,096,233
- Total Deposits
- ₩6,000,000
- Total Interest (pre-tax)
- ₩113,750
- Interest Income Tax (14%)
- ₩15,925
- Local Income Tax
- ₩1,592
- Net Interest
- ₩96,233
What is Installment Savings Calculator?
This calculator sums simple interest for each monthly payment over its remaining deposit term. It separates the 14% interest income tax and local income tax, and offers a tax-free estimate only when you have confirmed eligibility with the provider. Product rounding and terms may change the actual maturity amount.
How to Use
- Enter the monthly payment as a positive whole-won amount.
- Enter an annual rate and 1 to 120 monthly payments.
- Choose tax-free only after confirming product eligibility.
- Review the installment simple-interest estimate, taxes, and protection caveat.
Tips & Best Practices
- Each monthly payment earns simple interest only for its remaining deposit term.
- The monthly table's integer interest total exactly matches gross interest.
- Choose tax-free only after the provider confirms product and personal eligibility.
- General treatment separates 14% income tax and local tax equal to 10% of that tax.
- The 2025-09-01 KRW 100 million guidance is not a legal decision; confirm the product separately.
Use Cases
Down Payment Savings
Calculate how much you need to save monthly to accumulate a target down payment amount within a specific timeframe.
Emergency Fund Building
Determine the maturity amount if you commit a fixed monthly amount to build a 6-month emergency fund over 1-2 years.
Tax Impact Comparison
Compare general taxation with an eligibility-confirmed tax-free estimate.
Savings Goal Planning
Enter your target maturity amount and adjust the monthly deposit and term until the calculator shows a result that meets your goal.
FAQ
Does this estimate monthly compounding?
No. Each payment earns simple interest for its remaining term; this is not a monthly-compounding estimate.
How is installment interest estimated?
The integer formula sums each payment's remaining months and floors the total once.
How are tax and tax-free treatment handled?
General tax is 14% income tax plus local tax equal to 10% of it. Confirm tax-free eligibility separately.
Does the KRW 100 million notice decide protection?
No. The 2025-09-01 limit concerns protected principal plus prescribed interest per depositor at the same institution. Confirm the product separately.