Even before visiting a property, the bank already has a clear idea of what it will agree to finance. The mortgage loan is based on a set of criteria that each institution applies to your file. Understanding these criteria allows you to prepare a solid application and avoid refusals that slow down a purchasing project.
The HCSF derogatory margin, an unknown lever to obtain a mortgage
Competitors often list the same rules: debt-to-income ratio, down payment, job stability. However, one point is rarely explained in consumer guides: the derogatory margin that banks have.
Since the D-HCSF-2021-7 decision, banking institutions must adhere to a maximum effort rate of 35% including insurance and a loan duration capped at 25 years (27 years in certain cases: new, construction, old properties with major renovations). These standards will still apply in 2026.
The subtlety is that banks can deviate from these caps on 20% of their quarterly production of new loans. In practice, if your debt-to-income ratio slightly exceeds 35% but your disposable income is comfortable, your application may fall within this derogatory envelope. A couple with high incomes or existing assets is more likely to benefit from this.
Why does this detail matter so much? Because a refusal based solely on the debt-to-income ratio is not always definitive. Approaching multiple banks increases the likelihood of encountering an institution that has not yet consumed its quarterly margin. By studying the credit criteria at Pluriel Immobilier, you can better understand the actual margins for maneuvering based on your profile.
Debt-to-income ratio and disposable income: two complementary calculations
You may have noticed that two households with the same salary do not necessarily obtain the same loan amount? The reason lies in the difference between the debt-to-income ratio and disposable income.
The debt-to-income ratio measures the portion of your net income dedicated to repaying all your loans. The 35% rule sets the ceiling. Let’s take a simple example: with €3,000 in monthly net income, the total monthly payment of your loans should not exceed €1,050.
Disposable income, on the other hand, represents the amount that remains after paying all fixed expenses. Two borrowers with a 34% debt ratio do not have the same disposable income if one earns €2,500 and the other €6,000. The bank looks at both indicators together.
For a household with modest income, disposable income sometimes weighs more heavily in the decision than the gross debt-to-income ratio. Conversely, a high income with a debt ratio of 36% may pass thanks to the derogatory margin mentioned earlier, precisely because the disposable income remains very comfortable.
Bank file: what the bank looks at beyond income
Job stability and income level form the basis of the file. A permanent contract or civil servant status reassures. Self-employed individuals generally need to provide several years of financial statements to demonstrate the consistency of their income.
The bank then examines three concrete elements that can sway a decision:
- Account management over the last three to six months: frequent overdrafts, rejected direct debits, or online gambling expenses signal a risk. A well-managed account, even with average income, sends a positive signal.
- The personal contribution, which at a minimum covers ancillary costs (notary fees, lender guarantee). A contribution representing at least 10% of the purchase price is expected by most institutions.
- The overall coherence of the project: the property’s price compared to the local market, the ability to absorb a potential increase in charges (co-ownership, property tax), and the nature of the property (primary residence, rental investment).
A detail often overlooked: ongoing consumer loans directly reduce your borrowing capacity. Paying off a small loan before submitting a file can free up several tens of thousands of euros in capacity over the duration of the mortgage.
Borrower insurance and loan duration: two adjustment variables
Borrower insurance is included in the calculation of the 35% effort rate. Its cost varies greatly depending on age, health status, and the level of coverage chosen. Since the Lemoine law, it is possible to change borrower insurance at any time, which allows for a reduction in the overall cost of the loan after signing.
The loan duration is another lever. Extending the duration reduces the monthly payment but increases the total cost of the loan. The limit remains set at 25 years (27 years with a deferral for new properties or significant renovations). A borrower who hesitates between 20 and 25 years should compare the total additional cost in interest with the monthly gain in disposable income.
Here are the documents that most banks require to process a file:
- Identity document and proof of residence
- Last three payslips (or financial statements for the self-employed)
- Last two tax notices
- Bank statements from the last three to six months
- Sale agreement or reservation contract for the targeted property
Preparing these documents in advance speeds up the processing of the file. A complete file from the first submission avoids back-and-forth that consumes time, especially when a sale agreement sets a deadline for obtaining financing.
The criterion that distinguishes an accepted file from a rejected one is not always income. It is often the coherence between the amount requested, the financial management visible on the statements, and the actual capacity to absorb the monthly payments without strain. Paying attention to these three points gives a concrete advantage in front of the credit analyst reviewing your application.
