You pay 900 euros in rent each month and are considering a mortgage. Will the bank consider this rent as a liability in your debt-to-income ratio? The answer depends entirely on your project, and the mechanics are less intuitive than they seem. Understanding how your rent impacts your banking file allows you to anticipate your borrowing capacity even before stepping into an agency.
Rent and debt-to-income ratio: a liability that disappears or remains
The debt-to-income ratio is the ratio of your fixed expenses to your net income. Banks cap it at 35% including borrower insurance, in accordance with the standards of the High Council for Financial Stability (HCSF).
Let’s take a simple case. You are a tenant and wish to buy your primary residence. Your current rent will no longer appear in your expenses after the purchase, as you will no longer pay it. The mortgage payment replaces it.
The bank will therefore not add rent and loan payment together. It substitutes one for the other. As explained by the Investory site and the debt-to-income ratio, this distinction radically changes the calculation for a first-time buyer.
On the other hand, if you already own your primary residence and are buying a rental property, the situation is different. Your existing loan payment remains in the expenses, and the new payment is added to it. Here, the rent you will receive from the rental property will be included in your income, but not at 100%.
Rental income in the debt calculation: why the bank applies a discount
You may have heard that a rent received of 800 euros per month only counts for 560 euros in the eyes of the bank. This is not arbitrary.
Banks generally retain 70% of received rents to account for the risk of rental vacancy, unpaid rents, and non-recoverable expenses. This weighting coefficient protects the lending institution, but it mechanically reduces your borrowing capacity.
Two methods coexist depending on the institutions:
- The compensation method: the weighted rents are deducted from your loan expenses before calculating the debt ratio. This approach benefits investors whose received rent covers a large part of the payment.
- The addition method: the weighted rents are added to your income, and then the debt ratio is calculated normally. The result can be significantly different, sometimes to your disadvantage.
- Some banks combine both approaches and retain the least favorable scenario. Asking about the method used before submitting a file avoids unpleasant surprises.
Testing both methods with your own figures is the only reliable way to know if you stay below the 35% threshold.
Housing effort rate: the criterion that banks really look at
The gross debt-to-income ratio does not tell the whole story. Since the tightening of HCSF standards, banks are increasingly interested in the housing effort rate, which adds the rent (or loan payment for the primary residence) and all housing-related expenses.
Why this shift? Because a household can show a debt-to-income ratio of 33% while dedicating almost the entirety of that ratio to housing alone. The remaining disposable income then becomes too low to absorb an unexpected event.
The remaining disposable income measures what is left after all fixed expenses, including loan payments. A couple with two children will not be evaluated the same way as a single person, even with the same debt-to-income ratio. Banks set minimum thresholds for remaining disposable income that vary according to household composition.
In practice, a high rent before the purchase serves as a signal for the bank. If you were already paying rent close to the future loan payment and your bank account shows healthy management, this is an argument in your favor. Your rent payment history acts as proof of sustainability.
Getting below 35% debt when rent weighs heavily
You have done the calculation and you exceed 35%. Before giving up, several levers deserve to be examined.
Extending the loan duration reduces the monthly payment and mechanically lowers the debt-to-income ratio. The maximum duration allowed by the HCSF is 25 years, extended to 27 years for certain specific cases (purchase in VEFA or with significant renovations, for example).
Another lever concerns ongoing loans. An auto loan or a consumer loan that ends in a few months can be paid off early. Each payment removed frees up borrowing capacity.
A third avenue: personal contribution. The higher your contribution, the lower the borrowed amount, and thus the monthly payment. This does not change your income, but it directly lightens the numerator of the debt ratio.
Finally, the HCSF exemption exists. Banks have some leeway to grant a portion of their loans beyond the 35% threshold. This margin is regulated (it concerns a limited quota of files), and banks reserve it primarily for first-time buyers or profiles with comfortable remaining disposable income despite a slightly higher debt ratio.
What rent reveals about your borrower profile
A rent that represents a significant portion of your income is not necessarily an obstacle. If your bank statements show regular savings despite a high rent, the bank sees it as a sign of good management. The current rent acts as a real-life stress test.
Conversely, a low rent combined with frequent overdrafts raises more concerns than a high rent with a well-managed account. The bank reasons in terms of overall risk, not just percentage.
The amount of rent you pay today is not just a number in an expense column. It conditions the reading the bank will make of your ability to bear a loan payment over 20 or 25 years, and this reading goes far beyond a simple division.