This article is general information for foreign owners of French residential property, not legal or tax advice. Rent rules in France are set by the loi du 6 juillet 1989, the loi ALUR and a thicket of local rules that change from one commune to the next. Before you serve any notice or sign an avenant, check your own lease and, where the stakes justify it, take advice from a French avocat or your local ADIL.
Last Updated: June 2026
Here is a sentence that surprises almost every foreign landlord the first time they hear it: in France, you do not get to raise the rent just because you feel like it, just because your costs went up, or just because the flat down the road now lets for 40% more. The rent on a French home is one of the most tightly choreographed numbers in the whole tenancy, and the choreography is written into statute. You can move it – landlords do, every year – but only along three narrow, pre-approved paths, each with its own trigger, its own ceiling, and its own paperwork. Step outside them and the increase is simply void, which means you spend months chasing money a court will never let you keep. So before you reach for the calculator, it is worth understanding which of the three doors is actually open to you, because the honest answer is often “only one, and only a little.”
This guide walks through all three – the annual revision tied to an official index, the increase after improvement works, and the big one, the reevaluation of an under-valued rent at renewal – and it does so with the case law that decides who wins when these fights reach the courts. None of it depends on where you live: a landlord in Manchester, Sydney or Toronto letting a flat in Lyon plays by exactly the same rules as a landlord in the next arrondissement.
The three doors: a quick map before the detail
Most rent disputes come down to a landlord trying to use the wrong door. The annual revision is small and automatic but capped hard by an index. The works route needs your tenant to say yes. And the under-valued-rent route – the only one that can move a rent meaningfully – exists at one moment only, the renewal, and comes wrapped in more procedure than the other two combined. Here is the map.
| Route | When you can use it | How much it lets you add | Tenant’s agreement? |
|---|---|---|---|
| Annual revision (clause de revision + IRL) | Once a year, on the lease’s anniversary, only if the lease contains an indexation clause | Capped at the change in the rent index – just 0.78% on the Q1 2026 figure. Frozen entirely for F and G energy ratings | No – it is automatic, provided you claim it within one year |
| After improvement works (travaux d’amelioration) | Mid-lease, after you have paid for genuine improvements | Whatever the two of you agree | Yes – it needs a clause or an avenant signed by the tenant |
| Reevaluation of an under-valued rent | At renewal only, and never if you have served a conge for the same date | In tense zones, half the gap to local rents – then phased in over years | No, but the tenant can refuse and force conciliation |
Door one: the annual revision and the rent index
This is the routine one, the increase that should land quietly on the lease anniversary each year. But it only exists if you put it in the contract. As the Ministry of the Economy states plainly, without a revision clause (a clause de revision) in the lease, the rent cannot be increased at all for the entire duration of the contract. No clause, no annual rise – full stop. So the first thing to do is read your own lease.
Where the clause exists, the increase is pinned to the indice de reference des loyers (the rent reference index, or IRL), which the INSEE recalculates every quarter. The formula is mechanical: new rent = (current rent excluding charges × IRL at the revision date) ÷ IRL one year earlier. In plain terms, your rent can rise by the same percentage the index rose over the year – no more.
| Territory (Q1 2026) | IRL value | Maximum annual increase |
|---|---|---|
| Metropolitan France | 146.60 | +0.78% over one year |
| Corsica | 142.38 | +0.78% |
| Guadeloupe, Guyane, Martinique, La Reunion, Mayotte | 143.78 | +0.78% |
Put a number on it: a €1,000 rent revised on its 2026 anniversary using the Q1 index can rise to about €1,007.80 a month – an extra €7.80, or roughly €94 a year. Not nothing, but hardly the inflation-beating jump some owners expect. If you would rather not do the arithmetic, the ANIL runs a free revised-rent simulator.
Here is the trap that catches absentee and foreign owners most often: use it or lose it. The loi ALUR killed the old automatic catch-up. Under article 17-1 of the 1989 law, the revision now applies only from the date you actually demand it, and if you fail to claim it within one year of the revision date, you are deemed to have waived that year’s increase for good. The clause does not vanish – you can revise again next year – but the year you forgot is gone. For an overseas landlord who only looks at the account every spring, that is a standing invitation to leave money on the table.
The energy-rating freeze: F and G rents cannot move at all
One overriding rule sits on top of all this. The loi Climat et resilience bans any rent revision on homes rated F or G on their energy performance certificate (the diagnostic de performance energetique, or DPE). If your property is a passoire thermique (a “thermal sieve”), the rent is frozen – no annual indexation, full stop – for any lease signed, renewed or tacitly extended since 24 August 2022 in mainland France, and since 1 July 2024 in Guadeloupe, Martinique, Guyane, La Reunion and Mayotte. The lesson writes itself: a poor energy rating does not just dent your resale value and threaten your right to let, it quietly locks your rent in place until you renovate.
Door two: raising the rent after improvement works
The second route lets you lift the rent in the middle of a lease, but only if you have actually improved the place and only if your tenant agrees. The conditions are narrow. The works must be genuine travaux d’amelioration (improvement works, not mere repairs or upkeep), and you, the landlord, must bear their cost. Crucially, the resulting increase has to be written down – either as a clause in the original lease or as an avenant (an addendum) signed by the tenant once the works are finished. No signature, no increase. This is the one door of the three that genuinely requires your tenant to walk through it with you, so the rent rise here is really a negotiation dressed up as a procedure.
Door three: re-pricing an under-valued rent at renewal
This is the only route that can move a rent by a meaningful amount, and predictably it is the one buried in procedure and litigation. If you believe the rent is badly out of step with what comparable homes nearby command, you can propose a reevaluation – but only at the renewal of the lease, and you cannot do it while also serving a conge (a notice to quit) for the same term. Pick one.
“Manifestly under-valued” – and you have to prove it
The bar is not “a bit cheap.” The statute requires the rent to be manifestly under-valued, and the courts have held that line for thirty years. The Cour de cassation fixed the standard early – the under-valuation must be manifest (Civ. 3e, 1 March 1995, no. 92-16.919) – and, just as importantly, it has put the burden squarely on the landlord to demonstrate it (Civ. 3e, 12 October 2011, no. 10-21.214). A vague sense that you are under market will not survive a hearing; you need evidence.
The evidence: comparable local rents
That evidence takes a very specific form – a dossier of comparable rents in the neighbourhood. The minimum count is set by the size of the area:
| Where the property sits | Minimum comparable rents you must cite |
|---|---|
| An agglomeration of more than 1 million inhabitants | 6 comparable dwellings |
| Anywhere else | 3 comparable dwellings |
The comparables cannot be cherry-picked. They must sit in the same building group or a similar one, and in at least two-thirds of them the tenants must have been in place for more than three years – the point being to capture settled, representative rents, not fresh re-lettings at the top of the market. Each reference has to be described in forensic detail: street and the rough block of numbers, type and era of building, floor and whether there is a lift, habitable surface and number of rooms, the equipment (inside WC, bathroom, central heating), whether that tenant has been there more or less than three years, and the actual monthly rent excluding charges.
The case law on these references rewards care and punishes shortcuts. You may even rely on rents from other flats you own yourself, provided they genuinely represent rents in the immediate vicinity (Civ. 3e, 17 December 2014, no. 13-24.360) – a useful point for an investor with several units in one building. But the comparables must concern homes under the same letting regime as the one you are re-pricing; references drawn from differently-regulated tenancies get thrown out (Civ. 3e, 24 May 2017, no. 16-15.750). One thing you do not have to do is incant the magic words: the Cour de cassation has confirmed there is no obligation to actually write “manifestly under-valued” in the notice itself (Civ. 3e, 30 November 2005, no. 04-16.050). The substance is what matters, not the label.
The notice, and the six-month clock
Your re-pricing proposal must reach the tenant – by acte de commissaire de justice (bailiff) or registered letter with acknowledgement of receipt – at least six months before the lease ends, and it must carry the mandatory wording and the full list of references. A practical detail that has tripped up landlords: where you use a registered letter, the date that counts is the day the tenant actually receives and signs for it, not the day the postman first calls (Civ. 3e, 19 January 2000, no. 98-10.486). Send it late and you have missed the window entirely, so build in a buffer.
If the tenant says no – or says nothing
The tenant is free to refuse, and here is the sting in the tail that catches optimistic owners: silence counts as refusal, not consent. An unanswered proposal is a rejected proposal. When the tenant refuses or stays silent, you cannot simply impose the new figure – you must take the dispute to the commission departementale de conciliation, the free, county-level mediation body, before any judge will hear you. The commission tries to broker a deal; if it cannot, the matter goes to court, which then fixes the rent. Skipping the commission is not a shortcut – it makes your court claim inadmissible.
And even when you win, the increase arrives slowly
Suppose you prevail. You still do not get the full uplift at once. The law phases it in (etalement), and the pace depends on the size of the jump and the type of let:
| Situation | How the increase is spread |
|---|---|
| Unfurnished let, increase under 10% of the initial rent | Spread across the new lease – one third per year over a 3-year lease, one sixth per year over a 6-year lease |
| Unfurnished let, increase over 10% | By one sixth per year, whatever the lease length |
| Furnished let, increase over 10% | By one third per year, on the renewed contract and at subsequent renewals |
So the rent you fought for over a six-month notice, a conciliation hearing and possibly a judge can still take three to six years to fully arrive. Re-pricing an under-valued French rent is a long game, not a quick fix – which is precisely why getting the lease and the initial rent right at the outset matters so much more than trying to claw it back later.
Tense zones and rent-control cities: tighter still
Two overlays can squeeze the renewal re-pricing even further. First, if your property sits in a zone tendue (a designated high-pressure housing area), the reevaluation is capped at half the gap between your rent and comparable local rents – you can close only half the distance, not all of it. You can check your commune on the service-public.fr simulator.
Second, a smaller club of cities runs full encadrement des loyers (rent control), with hard reference ceilings per neighbourhood, building age and size: Paris, Lille (with Hellemmes and Lomme), Lyon and Villeurbanne, Montpellier, Bordeaux, the Pays Basque agglomeration, parts of Grenoble-Alpes Metropole, and the Est Ensemble and Plaine Commune territories around Paris. In those cities the ceiling, not your comparables, sets the limit. The Paris scheme is an experiment with a fixed end date – its current authorisation runs to November 2026, and whether it is extended or renewed beyond that is still an open question. The Institut des politiques publiques’ mixed verdict on the capital’s rent-control regime found the caps shaved 2-4% off rents while more than a third of recent leases sat above the cap anyway, which feeds the argument on both sides. While the scheme is in force, the cap governs, not your comparables.
The furnished-versus-unfurnished distinction matters throughout, and not only for the phase-in: the whole tax calculus differs too, which is why the furnished-letting tax status that turns rental profit into near-zero taxable income is worth weighing before you even choose how to let. And if you are weighing a let that leans into affordability in exchange for a tax break, the income-capped rents under the Loc’Avantages scheme come with their own rent ceilings that override the revision maths entirely.
FAQ: revising a French residential rent
Can I raise the rent in the middle of a lease?
Only in two cases: the annual indexation, if your lease contains a revision clause, and an increase after improvement works that your tenant agrees to in writing. A general re-pricing of an under-valued rent is possible only at renewal.
My lease has no revision clause. Can I still index the rent each year?
No. Without a clause de revision in the contract, the rent stays fixed for the whole lease. You would have to wait until renewal and use the under-valued-rent route, which is far more demanding.
How much can I add on the annual revision in 2026?
At most the rise in the IRL. On the Q1 2026 index that is 0.78% over a year – about €7.80 a month on a €1,000 rent. And nothing at all if the home is rated F or G on its DPE.
I forgot to apply last year’s increase. Can I catch it up?
No. Since the loi ALUR, if you do not claim the revision within one year of the revision date, that year’s increase is permanently lost. You can resume indexing from the next anniversary.
Does it make a difference that I live abroad?
No. The revision rules, the index cap, the energy freeze and the renewal procedure apply to every landlord of a French home regardless of where the owner is tax-resident. What changes with residence is how the rental income is taxed, not how the rent is set.
The tenant ignored my re-pricing proposal. Does silence mean yes?
No – silence is treated as a refusal. You then have to refer the matter to the commission departementale de conciliation before a judge can fix the rent.
