The property market is showing signs of recovery. Interest rates have fallen back to around 3%. Prices have stopped falling. But beneath this improvement, households are still shouldering the burden of 20 years of soaring property prices. In the third quarter of 2025, their mortgage debt still amounted to 126% of their disposable income, according to the annual report published on Friday 31 July by the Central Bank of Luxembourg (BCL). In other words, the outstanding stock of mortgage loans exceeds the annual disposable income of all households by around a quarter.
This figure does not mean that every household owes the equivalent of 126% of its income. It is a ratio calculated across the entire population. However, it places Luxembourg amongst the European economies where mortgage debt is the heaviest.
The situation is improving. In the fourth quarter of 2024, mortgage debt still stood at 134% of disposable income. It had reached 131% at the end of 2023, according to the data available at the time, before the series were revised. Falling house prices, a slowdown in new lending and nominal growth in incomes have brought the ratio down again. However, they have not brought it down to a level that the BCL considers to be safe.
Total household debt, which includes non-mortgage borrowing, still stood at 173% of disposable income at the end of 2024, compared with an average of 83% across the eurozone. Nearly 80% of this debt was attributable to mortgage loans. In 2024, 38% of Luxembourg households held such a loan, compared with 26% across the euro area as a whole, according to the BCL’s Financial Stability Review.
Young households: a particular area of focus
The risk lies not only in the amount of debt, but also in how it is distributed. Households collectively hold financial assets amounting to 237% of their debt. This wealth might give the impression of a very sound balance sheet. However, it is concentrated more among the wealthiest households, whilst the ratio of debt to assets is significantly higher among lower-income households.
The same national average can therefore encompass both a homeowner with a substantial financial portfolio and a young household whose assets consist mainly of a home purchased on credit. In 2023, loan repayments accounted for less than 40% of disposable income for 75% of households in debt. The BCL nevertheless observed a more pronounced vulnerability among certain categories of borrowers.
Young households are a particular area of concern. The latest detailed data available, which dates back to 2021, put their average mortgage debt at €477,000, compared with €450,000 for all households concerned. At that time, a third of young borrowers had debt exceeding three times their gross income. Although these figures are now out of date, a study published by the BCL in April 2026 found that the proportion of income spent on repayments has risen slightly since 2021, particularly for variable-rate loans.
However, the structure of the loans protects some borrowers from immediate changes in interest rates. The majority of the mortgage portfolio is fixed-rate. The proportion of variable-rate loans among new loans, which was close to 80% in 2014, had fallen to 36% by March 2025.
Decline in new contracts
Improved financing conditions are not enough to stimulate a sustained recovery in demand. In May 2026, the average variable rate on new mortgages stood at 3.10%, compared with 3.33% a year earlier. However, new contracts had fallen by €41m year-on-year to 212 million, according to the latest statistics from the BCL.
The Central Bank is also looking at the other side of the loan: the institutions that granted it. Five domestic banks account for nearly 90% of mortgage loans to households. A sharp rise in defaults would therefore not be spread evenly across the financial sector. It would primarily affect a small number of institutions with significant exposure to the Luxembourg housing market.
It is notably for this reason that the authorities have maintained the countercyclical capital buffer at 0.5% in 2025 and early 2026. This buffer requires banks to hold more capital in order to absorb any potential losses without disrupting the flow of finance to the economy. The decision may seem paradoxical: the mechanical indicator based on credit growth would have allowed this buffer to be set at zero. The CSSF and the Systemic Risk Board have opted to remain more cautious.
The identified risk is therefore not that of a crisis that is already underway. It lies in the potential for an economic shock to spread. A fall in incomes, a rise in unemployment or renewed pressure on interest rates could put the most heavily indebted households under strain, lead to more defaults and, at the same time, affect the banks most exposed to these risks.
The property market correction has reduced the risk. It has not wiped out the loans taken out when prices were rising much faster than incomes. The market may recover within a few quarters. Property debt, however, often remains with a household for 20 or 30 years.
