The biggest fixed cost most months is loan interest. If you're still holding a mortgage taken at a high rate a few years ago, refinancing to a lower rate can save tens of thousands of won a month — millions a year. And in Korea you can now do it entirely in an app.
Want to see how much you'd save? Put your current rate and a new rate into the loan calculator and compare monthly payment and total interest.
Refinancing now takes minutes in an app
Since 2024, Korea's online one-stop refinancing infrastructure lets you switch a mortgage without visiting a branch:
- Compare — check rates across banks on a comparison platform (Naver Pay, Kakao Pay, Toss, Finda) or bank apps (5–10 min). Checking repeatedly does not hurt your credit score.
- Apply & review — pick a product; income, employment and collateral (apartment KB market value) are assessed (usually 2–7 days).
- Execute — once approved, the new bank repays your old loan directly. No trip to the old bank.
Before you switch — count the costs
- Prepayment fee — closing within 3 years may cost about 0.5–1.4% of the balance; after 3 years it's usually waived.
- Stamp duty and other small fees.
Refinancing pays off most when the rate gap is 0.5%p+, 5+ years remain, and the 3-year prepayment window has passed. If monthly savings beat all costs, go for it.
Watch-outs
- It's a fresh review — if your income dropped or credit fell since the original loan, your rate or limit could worsen.
- DSR limits — total loan repayments vs. income (typically 40% at banks) can cap your amount.
- Relationship perks — bonus rates tied to salary transfer or card usage may vanish when you change banks. Compare the total.
FAQ
Does checking many times lower my score?
No. Rate checks within the refinancing system don't affect your credit score, even repeated.
What about villas or multiplexes?
Apartments with a KB market price are the default. Villas/detached homes may not qualify for the app flow and can need a branch.
How is this different from a rate-cut request?
A rate-cut request lowers your rate at the same bank when your credit improves; refinancing moves you to a different bank's cheaper loan. Try both.
A loan isn't set-and-forget. Comparing rates in an app once a year can save millions annually in minutes.
This is general information, not a product recommendation or financial advice. Rates, fees and eligibility vary — confirm with the lender before acting.
