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What the 47.6% figure means
The Korea Housing Finance Corporation (HF) recorded Seoul’s Korea Housing Affordability Index (K-HAI) at 185.3 in 2026 Q2. Seoul Economic Daily’s matching report translates that index reading into an estimated 47.6% of household income for principal and interest payments. The calculation scales the report’s benchmark manageable payment share of 25.7% by the K-HAI reading of 185.3. It is therefore a normalized estimate based on the index methodology, not a measurement of actual payments across all Seoul households. HF statistics portal; Seoul Economic Daily’s 2026 Q2 report.
What K-HAI measures—and what it does not
HF defines K-HAI as an index of the repayment burden when a median-income household buys a median-priced home with a standard loan. A higher reading means housing is less affordable under that representative scenario. The measure draws on housing prices, mortgage rates and household income; HF identifies Korea Real Estate Board median housing or apartment prices, the Bank of Korea rate on newly handled housing loans at deposit-taking banks, and income estimates using Statistics Korea and labor data with regional adjustment as inputs. HF’s K-HAI methodology.
The index is useful for comparing affordability under consistent assumptions, but it is not a direct won-denominated mortgage payment or an individualized borrowing assessment. Actual costs vary with a buyer’s income, home price, down payment, loan size, rate, term and other loan conditions.
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Seoul’s reading rose while the national index barely moved
HF’s portal lists Seoul at 185.3 for 2026 Q2, compared with 179.3 in Q1. Seoul Economic Daily reports that the six-point increase was the only regional rise in its comparison. By contrast, the national K-HAI edged up to 61.8 from 61.5 in Q1; it had been 59.6 in 2025 Q3. HF’s Q2 regional readings included 81.2 for Gyeonggi and 66.8 for Incheon. These figures are index readings, not percentages of income or monthly payments. HF statistics portal; Seoul Economic Daily.
| Area or series | 2026 Q2 K-HAI | Earlier comparison |
|---|---|---|
| Seoul | 185.3 | 179.3 in Q1 2026; six-point increase, according to Seoul Economic Daily |
| South Korea | 61.8 | 61.5 in Q1 2026; 59.6 in Q3 2025 |
| Gyeonggi | 81.2 | Not stated in the cited Q2 comparison |
| Incheon | 66.8 | Not stated in the cited Q2 comparison |
Source for index values: HF statistics portal. Seoul’s Q1 change and national historical comparisons are reported by Seoul Economic Daily.
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How home size changes the representative burden
Seoul Economic Daily’s Q2 breakdown shows markedly different readings by exclusive floor area. Its 60–85 m² group includes the commonly used 84 m² layout, but the bracket’s result should not be treated as the affordability level of every 84 m² home or borrower.
| Seoul exclusive-area category | 2026 Q2 K-HAI | Reported principal-and-interest share |
|---|---|---|
| Up to 60 m² | 124.3 | Not stated |
| 60–85 m² | 191.5 | 49.2% |
| 85–135 m² | 270.2 | Not stated |
| Above 135 m² | 513.4 | Not stated |
The 49.2% figure is the report’s estimate for the 60–85 m² category; it is not a universal payment ratio for homes of that size. The report does not provide corresponding income-share estimates here for the other brackets. Seoul Economic Daily.
Why the index increased
Seoul Economic Daily attributes the Q2 rise in borrowing costs to higher financial-debenture yields, which it says serve as a benchmark for lending rates, amid external shocks including Middle East geopolitical risk. This is the report’s explanation for the increase, not a quantified breakdown proving how much each factor contributed. Seoul Economic Daily.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to use the figure when considering a purchase
K-HAI is a market-level warning about the squeeze between local housing prices, borrowing costs and income in the standard case. It can help frame comparisons across places or quarters, but it cannot determine whether a particular home is affordable for you.
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- Estimate the monthly payment for the actual price, down payment, loan amount, interest rate and term you expect—not from the index alone.
- Compare that payment with take-home income and other recurring obligations, leaving room for housing costs beyond principal and interest.
- Stress-test the budget for a higher rate or unexpected expense before deciding what payment is sustainable.
- Use the same loan assumptions when comparing homes or locations; K-HAI readings are not currency amounts and should not be treated as direct payment comparisons.
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