Rent review and IRL index: how and when to raise rent
Updated on July 1, 2026 · 5 min read
The landlord may review the rent once a year, provided a review clause is in the lease, using the IRL index published by INSEE. Here are the rules.
The review clause is essential
Without a review clause in the lease, no annual increase is possible: the rent stays fixed for the whole term. The clause states the reference index and the review date.
The calculation formula
New rent = current rent × (reference-quarter IRL / same-quarter IRL a year earlier). The increase is therefore capped by the IRL change — it cannot be set freely.
Date and deadline
The review takes effect on the date set in the lease. The landlord has one year from that date to apply it; after that, the year’s review is lost. An automatic reminder avoids missing it.
Frequently asked questions
- Can rent be raised without a lease clause?
- No. Without a review clause, rent cannot be increased during the lease (barring special cases such as improvement works).
- What if I forget to review the rent?
- The review is not retroactive beyond one year: miss the window and you lose that year’s increase.