This is data that landlords are impatiently awaiting: the quarterly evolution of the rent reference index (IRL), on the basis of which they can revalue the rents of their tenants. In the third quarter of 2025, the IRL stood at 145.77, an increase of 0.87% over one year, according to figures published by INSEE this Wednesday, October 15.
To review your tenant’s rent, you must multiply its amount by the IRL for the third quarter of 2025 (), divided by the IRL for the third quarter of 2024, which was 144.51. Let’s take the example of a rent of 1,000 euros excluding charges. The calculation is as follows: 1,000 x (145.77/144.51) = 1,008.72 euros. You will therefore be able to increase your tenant’s rent to 1,008.72 euros, i.e. increase of 8.72 euros per month. This increase is not enormous because the IRL is calculated based on inflation (excluding tobacco and rent) over the last 12 months. However, since December 2024, inflation has fallen below the symbolic threshold of 2%. For comparison, when inflation was galloping, in 2023, the government decided to cap the IRL at +3.5% in order to protect tenants from excessively high rent increases.
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A rent increase on the anniversary date of the lease
But, for you to be able to revise the rent, it is still necessary thata clause provides for it in the lease. The accommodation must also be used as a main residence, furnished or unfurnished, which excludes rentals of secondary residences. Also note that if the property is a thermal strainer rated F or G on the energy performance diagnosis (DPE), you do not have the right to increase the rent.
Finally, you cannot proceed with this revaluation of the rent whenever you want. It applies once a year, generally on the anniversary date of signing the rental contract. The IRL for the third quarter of 2025 applies to the review of rental contracts including the anniversary date is between October and December 2025. If yours was signed on December 1, 2024, you will be able to increase the rent from December 1, 2025. The IRL for the fourth quarter will be published on January 15, 2026.
