[Editorial] Mortgage rates break above 7%, flashing a warning on household debt

As the upper band of fixed-rate mortgage rates at commercial banks has risen above 7% per annum, households are facing a heavier interest burden. According to the financial sector, fixed-rate mortgage loans at KB Kookmin Bank, Shinhan Bank, Hana Bank, Woori Bank and NongHyup Bank (NH Bank) stood at 4.41–7.01% per year as of the 27th. It has taken less than a month since war broke out involving the United States of America (USA), the State of Israel and the Islamic Republic of Iran for both the upper and lower ends of fixed rates to jump by more than 0.3 percentage points. This is the first time in about three years and five months, since October 2022, that the upper band of fixed-rate mortgage loans has exceeded the 7% level.
The sharp rise in mortgage rates stems from growing instability in financial markets as the Middle East crisis drags on. Concerns over higher global oil prices and inflation have pushed market interest rates up in a short period, which in turn has driven up yields on five-year bank bonds that serve as a benchmark for mortgage pricing. As banks’ funding costs rise alongside, it has become structurally difficult for them to lower lending rates.
Higher mortgage rates are directly increasing the burden on highly leveraged homebuyers who borrowed to the limit during the era of ultra-low interest rates. In 2021, at the height of the COVID-19 pandemic, many borrowers took out mortgages with rates reset every five years. They locked in loans at very low rates at the time, but as their interest rates are reset this year, their repayment burden could surge.
Rising mortgage rates are not just a problem for a subset of borrowers; they are tied to the stability of the entire financial system. The volume of mortgages scheduled for interest rate reset this year alone is estimated to exceed 10 trillion won. With bank loan delinquency rates already on the rise, a continued uptrend in interest rates will inevitably heighten concerns about household debt turning sour. If households are forced to devote more of their income to interest payments, consumption will weaken and domestic demand will cool. A rise in delinquencies could undermine banks’ soundness and trigger a vicious cycle in which lending capacity across the financial sector contracts.
The problem is that this upward pressure on interest rates is unlikely to dissipate quickly. If the Middle East conflict becomes protracted, central banks around the world will come under pressure to raise policy rates to contain inflation, and the Bank of Korea (BOK) will find it hard to stand apart from that trend. In fact, Citigroup Inc. has suggested that the new BOK governor may signal a rate hike at the Monetary Policy Board meeting in May.
The current rise in mortgage rates should be seen not as a temporary shock but as the result of structural pressure from accumulating external uncertainties. War, inflation fears and higher market interest rates are intersecting to amplify financial volatility. If the high-rate environment persists, the strain will build across the real estate and broader financial markets.
As of March last year, there were 459,000 domestic high-risk households with weak debt-servicing capacity, and people in their 20s and 30s accounted for 34.9% of that group. With financial risks mounting, it is more important than ever to manage household debt prudently. The BOK must fine-tune its rate signals to reduce uncertainty, while the government should both support a soft landing for vulnerable borrowers and improve the quality of household debt. If the shock from high interest rates is not eased in a timely and appropriate manner, household debt could at any time destabilize the financial system.