Mortgages: the ECB raises rates — what it means for your property project
A second key-rate hike in three months, French 10-year yields at their highest since 2008, bank rates edging up: autumn 2026 marks a turning point for property financing. We break down the figures and share practical advice to borrow on the best possible terms.
Gaston michelin
Agent immobilier
An autumn of monetary tightening
On 10 September 2026, the European Central Bank raised its three key interest rates by 0.25 percentage points. The deposit facility rate rises to 2.50%, the main refinancing rate to 2.65% and the marginal lending rate to 2.90%, effective 16 September. It is the second hike this year, following the one in June.
The reason: inflation is back, driven by soaring energy prices linked to tensions in the Middle East. Brent crude topped $100 a barrel in early September. In France, INSEE reports annual inflation of 2.4% in August (up from 2.1% in July), with energy prices up 16.7%.
The 10-year OAT: the real barometer for mortgage rates
For borrowers, the key indicator is not the ECB rate but the 10-year OAT, the rate at which the French state borrows on the markets. Banks fund their fixed-rate 20- and 25-year loans at conditions close to this benchmark. This summer the OAT crossed the 4% mark, a level unseen since 2008, and reached around 4.43% on 10 September.
Inflation is not the only factor: high public debt (117.5% of GDP in Q1 2026), successive downgrades of France's credit rating and political uncertainty ahead of the 2027 presidential election also push up the risk premium demanded by investors. The spread with German yields is now close to 80 basis points.
Sources: Pretto, ABC Bourse.
Where do mortgage rates stand?
Bank rates have already started to rise. According to Pretto's September barometer, average rates are:
3.43% over 15 years (+0.11 pt in one month)
3.54% over 20 years (+0.12 pt)
3.61% over 25 years (+0.11 pt)
In the second quarter, the average 20-year rate was still 3.23%. Several brokers now consider a move towards 3.7%–4% over 20 years by year-end plausible if the OAT stays above 4%. Nothing is set in stone, however: banks are still competing hard for good applicants, and the strongest profiles continue to secure rates well below average.
Sources: Pretto, Meilleurtaux.
What does it cost in practice?
For a €300,000 loan over 20 years (excluding insurance):
at 3.23%: monthly payment of about €1,699, total interest of about €107,700
at 3.54%: monthly payment of about €1,746, total interest of about €119,100
at 3.90%: monthly payment of about €1,802, total interest of about €132,500
Put another way: with a €2,100 monthly payment over 25 years, borrowing capacity falls from about €432,000 at 3.23% to €418,000 at 3.54%, and would drop to €402,000 at 3.90%. In Paris, where the average price exceeds €9,500/m², that means one to three square metres less.
Our advice for borrowing in this environment
Don't wait for a hypothetical fall. If your project is ready and the property is right, betting on a quick reversal in rates is risky in the current context.
Polish your application. A personal contribution (ideally enough to cover at least the notary fees), well-managed accounts and job stability are what allow you to negotiate below average.
Shop around. Comparing several banks or using a broker can save several tenths of a point.
Optimise your borrower insurance. Since the Lemoine law, you can switch insurer at any time, free of charge — an often underestimated lever on the total cost of credit.
Stay within HCSF rules. The debt-to-income ratio remains capped at 35% of net income (insurance included), over a maximum of 25 years (up to 27 years in some cases for new-builds).
Lock in your offer. Once the loan offer is issued, its terms are fixed for its period of validity, protecting you from a further rise before signing.
Higher rates also reshuffle negotiations
Rising rates reduce the number of solvent buyers and lengthen selling times: according to the latest notaries' barometer, 60% of them now expect prices to fall (JeChange). For a well-financed buyer, this is also a better environment to negotiate.
Planning a purchase or want to measure the impact of higher rates on your budget? The LGH Patrimoine team is here to help, and our online simulators let you take stock in a few minutes.
