[Korea] Loan Calculator (KR)
Loan Calculator (KR) — runs in your browser. Inputs are not stored.
Loan terms
Enter values, then press Calculate.
※ Monthly payment is principal + interest; total interest is interest only. For reference and may differ from your contract.
| Period | Payment | Principal | Interest | Balance |
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How to use
- Enter the principal you plan to borrow as the loan amount.
- Enter the repayment term in years (for example 30 for 30 years).
- Enter the stated or expected annual interest rate. Apply any preferential rate yourself.
- Choose equal principal-and-interest or equal principal, then click Calculate.
- Check the monthly payment, total interest, and per-period table. If the monthly burden worries you, compare by changing term and rate.
Key concepts: equal P&I vs equal principal
Equal principal-and-interest (amortizing) keeps the monthly amount (principal + interest) almost the same, which makes a living budget easier. Equal principal keeps the principal repaid each month the same while interest falls, and under the same terms total interest is often lower. Early monthly payments can be larger.
This calculator uses a monthly-rate approximation of the annual rate divided by 12. It does not include a grace period, prepayment fee, origination fee, or daily prorated interest. Results are for reference and may differ from a lender contract or statement.
Example
Set principal 100 million KRW, 4.5% annual, 30 years, equal P&I, and you can see monthly payment and total interest at a glance. Switch to equal principal under the same terms to compare a higher early monthly burden and lower total interest. Numbers change with your inputs, so entering your own terms is most accurate.
Related: DSR calculator · LTV limit calculator · Prepayment fee calculator · Installment calculator
Frequently asked questions
Why does the loan calculator differ from a bank app?
Preferential rates, grace periods, prepayment fees, origination fees, and daily interest methods are not included. Always confirm final terms in the lender contract.
Which method has lower total interest, equal P&I or equal principal?
With the same principal, rate, and term, equal principal often has lower total interest. Early monthly payments are larger.
How do monthly payment and interest differ?
Monthly payment is everything paid that month (principal + interest). Total interest is the sum of interest only through maturity. The table splits principal and interest per period.
Is a grace period included?
This version does not include a grace period. Grace periods often mean interest-only payments, so check the contract separately.
Do you also show DSR or a prepayment fee?
This tool only calculates the repayment schedule. For burden versus income see the <a href="/tools/dsr/">DSR calculator</a>; for early-repayment cost see the <a href="/tools/prepayment-fee/">prepayment fee calculator</a>.
Can I use it for installments or card installments?
The formula is similar, but the <a href="/tools/installment/">installment calculator</a> fits those inputs better. Use this page for housing or credit loans.
Last reviewed: 2026-09-04