Property insurance is not just about ticking a box when signing at the notary or moving into a home. Behind this generic term coexist distinct contractual mechanisms, with different compensation logics, legal obligations, and optimization levers that we detail here.
Compensation modes in home insurance: usage value, new value, and replacement
The difference between a correct compensation and an unpleasant surprise after a claim often lies in a clause that few policyholders read: the compensation mode specified in the contract. The offer has been structured around three levels of plans, each applying a different logic.
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In the economic plan, compensation is based on usage value, meaning it is calculated after deducting a depreciation coefficient. A sofa purchased five years earlier may only entitle the owner to a fraction of its purchase price. In the intermediate plan, some items are covered at new value, while others remain subject to depreciation. The premium plan, on the other hand, offers replacement at new for most movable goods, sometimes without a unit cap.
We recommend systematically checking the coverage table rather than the commercial name of the plan. Two “comfort” contracts from two different insurers may apply opposing depreciation rates on appliances or computer equipment. To delve into the contractual subtleties, insurance on Immobserver details several concrete cases of discrepancies between announced coverage and actual compensation.
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Natural disaster surcharge and price increase in home insurance
Home insurance rates have significantly increased between 2025 and 2026. The main cause has been identified: the growing climate-related claims and the increase in the natural disaster surcharge that took effect on January 1, 2025.
This surcharge, included in every multi-risk home insurance contract, finances the compensation scheme for natural disasters (floods, droughts, landslides). Its increase mechanically impacts the annual premium, regardless of the insurer.
Concrete impact on contract choice
The temptation to switch to an economic plan to absorb the price increase is understandable. However, it carries a risk: reducing the scope of coverage at a time when the probability of climate-related claims is increasing. It is better to act on other levers.
- Increase the voluntary deductible to reduce the premium while maintaining coverage for major claims (major water damage, fire, storm).
- Consolidate home and auto contracts with the same insurer to obtain a loyalty discount, often more effective than changing plans.
- Update the declared area and the movable capital: an overvaluation inflates the premium without reason.
Borrower insurance share: the underestimated parameter of a joint purchase
The share determines the portion of the capital covered for each co-borrower. On a loan taken out jointly, the bank requires a minimum of 100% in total, but the distribution remains negotiable.
A couple choosing a 50/50 share pays less in premiums. In the event of the death of one of the two, the insurer only covers half of the remaining capital owed. The survivor must continue to repay the other half, sometimes on a single income.
Adapting the share to income profile
If one of the co-borrowers generates a significantly larger portion of the household income, we recommend an asymmetric distribution (for example, 100/60 or 100/40). The additional cost in premiums remains moderate, but the protection in case of loss of this main income changes radically.
The Lemoine law now allows changing borrower insurance at any time, without fees or penalties. This option opens the possibility to readjust the share during the loan term if the couple’s professional situation changes, provided that the new contract offers at least equivalent coverage.
PTIA, disability, and incapacity guarantees: read the exclusions before the coverage table
Death and PTIA (total and irreversible loss of autonomy) guarantees are included in almost all borrower contracts. Permanent disability (IPT, IPP) and temporary work incapacity (ITT) guarantees vary significantly from one insurer to another.
The critical point is not in the list of subscribed guarantees, but in their conditions of activation and exclusions. Two common examples:
- Some contracts define incapacity in relation to “any professional activity,” while others define it in relation to “the activity performed at the time of the claim.” The latter definition better protects a specialized profile.
- Back and psychological disorders (lower back pain, depression) are often excluded by default. An exclusion buyback is possible for an additional premium, but it must be explicitly requested at the time of subscription.
The cost of borrower insurance can represent a significant portion of the total cost of the mortgage. Comparing contracts solely on the basis of the nominal rate leads to misjudgments. The TAEA (annual effective insurance rate) remains the only reliable indicator for comparing two offers, as it incorporates all costs related to coverage.
A poorly calibrated borrower contract only reveals itself at the time of the claim, when there is no room for maneuver. Reading the general conditions, particularly the medical definitions retained by the insurer, remains the only safeguard against a refusal of coverage.