Mortgages in non-regulated provincial areas carry a 0.75-point stress rate; those in the capital region and regulated zones carry 3.0 points. At the same income and terms, the borrowing limit differs by 21% — and the provincial grace period runs only to December 31.
Korea's prepayment fee is set by principal repaid × rate × (days remaining ÷ loan term), and hits zero three years after drawdown. Here is what repaying 100 million won costs at each point, at the 0.55% rate for 2026 loans.
Of Korea's three mortgage ratios, DSR usually decides the number. Running one case through a 40% LTV, the KRW 600m price-band cap and a 40% DSR shows which gate closes first.
Under stage-3 stress DSR, banks size a Seoul-area mortgage using the actual rate plus 1.50 percentage points. At a 60 million won income, 30-year term and 4% rate, the limit falls from 419 million to 352 million won.
Korea's COFIX benchmark was published at 3.05% and 2.54% on the same day depending on which version you read. On a 300 million won mortgage that is 1.53 million won of first-year interest — until the bank's spread cancels it out.
Korea's Didimdol loan covers households up to 60 million won of combined income and a 500 million won home; above that sits Bogeumjari. On the same 400M won home the limit splits 200M vs 280M, and 0.4pp of rate is 16.6M won of interest over 30 years.