Korean Loans Compared: Mortgage vs Personal Loan vs Credit Line (2026)

Korean borrowers choosing between unsecured personal loans (신용대출), mortgages (주택담보대출), and credit lines (마이너스통장) face very different rate structures. For 2026, mortgage rates sit around 3.8–4.5%, unsecured personal loans 5–8%, and credit lines 6–10%. Picking the wrong instrument can cost tens of millions over a 30-year horizon.

Three Major Loan Types at a Glance

30-Year Cost on a KRW 100 Million Loan

• Mortgage @ 4.2%: ~KRW 76 million in total interest over 30 years
• Personal loan @ 6.5%: ~KRW 127 million in total interest over 30 years
• Credit line @ 8% (avg utilization): ~KRW 160+ million if rolled forward

Where collateral is possible, the mortgage path saves a major working-age decade of net wealth.

When Each Makes Sense

• Mortgage: Buying a primary residence, refinancing existing high-rate debt secured by property, or HELOC-style cash-out.
• Personal loan: Wedding, tuition, medical procedure — a clearly defined, time-bounded lump-sum need. Choose level-payment amortization to avoid balloon shocks.
• Credit line: Business smoothing, emergency reserve. Pay down aggressively when cash flow normalizes — these rates compound mercilessly when balances persist.

DSR — The Regulator's Hard Limit

Korea's Debt Service Ratio (DSR) caps total annual principal-plus-interest repayments at 40% of annual income (50% for second-tier lenders, 70% for some special products). Stacking loans on top of an existing mortgage often hits the DSR ceiling before the headline interest rate matters. Run your numbers in the DSR calculator before applying.