Obtaining a mortgage requires considering several parameters: debt-to-income ratio, repayment duration, personal contribution, type of guarantee. Each bank weighs these criteria differently, resulting in notable discrepancies from one institution to another for the same application. Understanding where these discrepancies lie allows for targeting the right contacts and shortening the timeframes for obtaining financing.
Debt ratio, duration, and contribution: the thresholds that structure access to mortgage credit
The framework set by the HCSF imposes two main limits on banks when granting a mortgage. The table below summarizes the regulatory parameters in force.
| Criterion | Regulatory threshold | Margin for exception |
|---|---|---|
| Maximum debt ratio | 35% of net income | Up to 20% of quarterly production |
| Maximum loan duration | 25 years | 27 years if renovations represent at least 10% of the total cost |
| Use of the exception margin (2025) | – | 16.6% compared to 15.6% in 2024 |
The increase in the use of the exception margin means that more atypical applications, particularly those of first-time buyers, are crossing the 35% barrier. This is not a relaxation of the rules: it is a more refined use of the flexibility already provided.
For projects involving older properties with renovations, the possibility of extending the duration to 27 years thanks to the deferral of moving in remains underutilized. The 10% threshold of the total cost for renovations, lowered by a decision from the HCSF in December 2023, also applies to certain sales in VEFA and new constructions.
On the Accia Immobilier website, the simulation incorporates these regulatory parameters to quickly identify the feasibility of a project based on the borrower’s profile.
Strength of the loan application: what banks prioritize in their analysis
The production of housing loans rebounded in 2025, but banks have not relaxed their granting criteria. Therefore, the speed of obtaining financing depends less on the market context and more on the coherence of the submitted application.
Elements that accelerate a positive response
A complete application submitted from the outset avoids back-and-forth that can extend timelines by several weeks. Banks evaluate several dimensions simultaneously.
- The stability of income over the last two or three years, with bank statements showing no payment incidents or recurring overdrafts
- The amount of personal contribution, which reduces the risk for the bank and improves the proposed interest rate conditions
- The coherence between the real estate project (housing, location, use) and the calculated monthly repayment capacity below the 35% threshold
- The absence of ongoing consumer loans, which burden the debt ratio even before adding the mortgage payment
A borrower who pays off a car loan three months before submitting their application significantly alters their debt ratio. This type of adjustment has a direct effect on the bank’s response.
The case of self-employed profiles
Entrepreneurs and self-employed individuals face irregular income that complicates the assessment of their creditworthiness. In the absence of pay slips, banks require financial statements and tax notices for several years. Three years of stable activity is often the minimum expected to obtain financing under conditions comparable to those of a salaried employee on a permanent contract.
Borrower insurance: an often-underestimated negotiation lever
Borrower insurance represents a significant portion of the total cost of a mortgage. The Lemoine law allows for changing insurance contracts at any time, without fees or penalties, from the signing of the loan offer.
This possibility opens a concrete negotiation lever. The group contract offered by the lending bank is not always the most competitive, especially for young borrowers or those without medical history. Delegated insurance can reduce the overall cost of the loan more significantly than a decrease of a few basis points on the nominal rate.
However, refusals of delegation remain a source of friction. Borrower insurance is among the primary sources of disputes in personal insurance. Checking the equivalence of guarantees required by the bank before changing contracts avoids administrative blockages that could delay financing.
Bridge loans and extended duration: two mechanisms to know before preparing your application
The bridge loan benefits from specific treatment in the calculation of the debt ratio. For an owner selling a property to buy another, the way the bridge loan is considered in the debt ratio differs from the standard calculation. This special treatment can make an application viable when it would seem out of the ordinary with a standard calculation.
The 27-year duration, accessible when renovations reach the 10% threshold of the total cost, also changes the equation. On a large amount, two additional years of repayment sufficiently reduce the monthly payment to fall back below the 35% ceiling. This mechanism applies to both older properties with renovations and new constructions or VEFA.
These two provisions are not always presented by bank advisors. Identifying them before preparing the financing application allows for structuring the project differently and accelerating the agreement.
The production of mortgage loans has resumed a more sustained pace, but the quality of the application remains the determining factor for the speed of obtaining financing. A borrower who understands the regulatory thresholds, exploits the exception margins, and compares borrower insurance before approaching their bank saves time at every step of the process.
