Enter the average balance you actually drew on a Korean overdraft/revolving credit line account (마이너스통장), the annual interest rate, and the number of days used to calculate the expected total interest and daily interest for the period. The annual rate is always prorated on a fixed 365-day-per-year basis, so the same inputs give the same result regardless of when you calculate (leap years included).
Enter the average balance used, the annual interest rate, and the number of days used to calculate the expected interest.
| Period | Expected interest |
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This is a reference estimate only. Interest on a Korean overdraft/revolving credit line account (마이너스통장) accrues only on the amount actually drawn, and banks calculate it daily on the actual outstanding balance, which changes every day. This calculator assumes the average balance you enter stays constant for the entire period, and always prorates the annual rate using a fixed 365-day-per-year day-count regardless of the real calendar or leap years, so the same inputs always produce the same result no matter when you run the calculation. Actual loan balances fluctuate daily and banks may use different day-count conventions (some apply 366 days in leap years), so check your bank's app or product disclosure for the exact interest. This is not financial advice.