Savings & Deposit Interest Calculator
See what you receive at maturity after the 15.4% interest tax. With installment savings (적금), each monthly deposit earns interest only for the months it is in the account, so the interest is lower than a deposit at the same rate.
1-year after-tax interest: ₩1M/month savings vs ₩12M deposit
| Rate | Installment (₩1M/mo) | Deposit (₩12M) |
|---|---|---|
| 3% | ₩164,970 | ₩304,560 |
| 3.5% | ₩192,470 | ₩355,320 |
| 4% | ₩219,960 | ₩406,080 |
| 4.5% | ₩247,460 | ₩456,840 |
| 5% | ₩274,950 | ₩507,600 |
FAQ
How is interest taxed in Korea?
Interest is taxed at 15.4% at source (14% income tax plus 1.4% local income tax) unless the account is tax-advantaged.
Why is installment savings interest so low?
Only your first deposit earns interest for the full term; the last one earns one month. The effective return on a 4% one-year 적금 is roughly half that of a 4% deposit.