Rent review and the index: never miss a deadline
The annual rent review is a small operation on a fixed date. It rests on the rent reference index, published each quarter by the national statistics office. The calculation is simple. The trap is forgetting. A review not applied in time is lost for the year, and it repeats for the whole length of the lease.
This article explains how the index-based review works, why so many landlords miss it, and how automation keeps the calendar for you. All without the wrong index or the wrong date.
In this article
- How the index-based review works
- Why the deadline slips through
- What automation watches
- The link with charges and the receipt
- Where to start
How the index-based review works
The principle is framed. The lease sets a review date and a reference quarter for the index. On the anniversary date, you apply the change in the index between the old quarter and the new. The rent follows that change, no more, no less.
Two conditions matter. The lease must contain a review clause, otherwise the rent stays fixed. And you must apply the index set in the contract, not simply the latest published. Getting the wrong quarter distorts the calculation and weakens the review.
It is a fixed-date task with a clear rule, so ideal to hand to a tool, in line with what AI really automates in rental management.
Why the deadline slips through
The review gives no warning. It falls once a year, per lease, on different dates depending on the home. Across a portfolio, that makes as many deadlines scattered through the year, easy to let slip between two urgent matters.
And a missed review cannot be recovered freely. Past the deadline, the year's increase is lost, and the rent stays at the old amount. Over several years, the shortfall stacks up without ever making a sound.
A missed review does not cost once. It costs every month, until the end of the lease.
What automation watches
The tool holds the calendar of all your leases. As each anniversary date approaches, it calculates the new rent with the right index, the one set in the contract. It prepares the information letter to the tenant, ready to go.
You apply nothing blind. The new amount is presented to you for validation. You check, you confirm, the letter goes out and the rent is updated everywhere it is used.
| Step | What the tool does | Your role |
|---|---|---|
| Date tracking | Alerts before the deadline | Nothing |
| Calculation | Applies the right index | Nothing |
| Letter | Prepares the tenant notice | Validation |
| Update | Carries over the new rent | Confirmation |
The link with charges and the receipt
Once the rent is reviewed, everything that depends on it follows. The automatic receipt carries the new amount from the next month, without you correcting the template.
The review also coordinates with the service charge adjustment. Both touch the amount called each month, but do not mix: the rent follows the index, the charges follow real spending. The tool keeps the two distinct and coherent.
Where to start
We import your leases with their dates and reference indexes. We set up the review calendar, test on an upcoming deadline, then let the tool watch. You no longer miss a date, you just validate the amounts.
Frequently asked questions
Can I review a rent without a clause in the lease?
No. Without a review clause, the rent stays fixed for the length of the lease. The tool flags it for every contract concerned.
Which index should I apply?
The one set in the lease, matching the contract's reference quarter. The tool uses that quarter, not simply the latest published index.
Does the increase go to the tenant automatically?
No. The tool prepares the letter and calculates the amount, but sending goes through your validation. You keep the hand.
Is my data protected?
Yes. It is hosted in Europe and handled in line with GDPR. Nothing is shared without your consent.
Conclusion
The index-based review is simple to calculate and easy to forget. One date per lease, a precise index, and an increase lost at the slightest delay. Automation holds the calendar and prepares the calculation, you validate the amount.
To stop missing a review on your portfolio, we look at it together in a free 30-minute audit. No commitment, and no jargon.
Je conçois et déploie des outils IA pour les gestionnaires immobiliers. J'ai mis en production le logiciel qui fait tourner un des plus gros gestionnaires de France.