South Korea loan interest hikes add up to trillions in borrower costs

A projected 0.25‑percentage‑point rise in South Korea’s base rate would increase annual interest payments for all mortgage borrowers by about 1.8 trillion won, raising the average per‑borrower cost from 5.843 million won to 6.139 million won. The same rate increase would add roughly 1.8 trillion won to the yearly interest burden of self‑employed borrowers, with an average per‑person rise of about 560 thousand won. Larger hikes of 0.5 and 0.75 percentage points could push total extra interest costs for mortgage borrowers to 3.7–5.5 trillion won and for self‑employed borrowers to 3.6–5.4 trillion won, respectively. Analysts warn that higher rates could heighten loan‑repayment stress for vulnerable households and small‑business owners, raising the risk of arrears and debt distress.

The estimates are based on data submitted to the Bank of Korea and reflect the current loan‑balance composition, including variable‑rate mortgages, jeonse‑fund loans and other credit products.