Commercial Lease Rent Increases

The increase of commercial lease rents is a major financial issue for tenant businesses and landlords alike. Between automatic indexation mechanisms, three-yearly reviews and renegotiation on renewal, the applicable rules vary according to the context and can quickly become a source of dispute. The issue affects the small neighbourhood shop and large retail chains alike, with direct consequences for the profitability and survival of commercial businesses. This article sets out the different mechanisms for the increase of commercial lease rents, the conditions in which they apply and the strategies that tenants and landlords may adopt.

The legal foundations of commercial rent increases

The principle of freedom of contract

Commercial leases (baux commerciaux) are in principle governed by freedom of contract between the parties. Unlike residential leases, there is no statutory cap on commercial rents when the lease is first entered into. That freedom also applies to the arrangements for rent increases provided for in the contract.

The parties may therefore freely agree on commercial rent review mechanisms, subject to public policy and to the protective provisions of the commercial lease statute. This contractual flexibility makes it possible to adapt the arrangements for increases to the nature of the business, the location of the premises and the particularities of the local market.

The commercial lease statute as a protective framework

The commercial lease statute, codified mainly in the French Commercial Code, nevertheless regulates certain arrangements for the increase of commercial lease rents. In particular, it provides for three-yearly review mechanisms and lays down specific rules on renewal of the lease. The three-year break dates and the right to renewal are covered in our article on the 3-6-9 commercial lease.

Practical case: Pierre has run a bakery for 8 years in premises let at €2,000 per month. The lease provides for annual commercial lease indexation on the commercial rent index (ILC). In 2024, the ILC having risen by 3.2% over one year, the landlord may legitimately ask for the rent to be increased to €2,064 per month, an increase of €64.

Automatic indexation of commercial rents

The mechanism of indexation on official indices

Commercial lease indexation is the most common mechanism for automatic rent increases. It consists of varying the amount of the rent in line with the change in a reference index, generally the Commercial Rent Index (Indice des Loyers Commerciaux, ILC) or the Tertiary Activities Rent Index (Indice des Loyers des Activités Tertiaires, ILAT).

That indexation must be expressly provided for in the commercial lease in order to apply. Failing an indexation clause, the rent remains fixed for the whole term of the lease, except for a three-yearly review or agreement of the parties.

The applicable reference indices

The main indices that may be used are:

• The Commercial Rent Index (ILC): applicable to commercial and craft activities
• The Tertiary Activities Rent Index (ILAT): for office and service activities
• The Construction Cost Index (Indice du Coût de la Construction, ICC): still usable for certain older leases

Practical example: Marie runs an estate agency under a lease signed in 2020 with indexation on the ILAT. The initial rent was €3,500 per month, with a reference ILAT of 112.50. In 2024, the ILAT having reached 118.25, the new rent is: €3,500 × (118.25 ÷ 112.50) = €3,678 per month, an increase of €178.

Frequency and arrangements for review

Indexation may be annual or take place at other dates provided for in the contract. The review is generally made at the landlord's request, and the landlord must observe a period of notice and justify the calculation by reference to the official indices published by INSEE (the French national statistics institute).

The tenant may challenge the calculation if it considers that it contains errors. In the event of persistent disagreement, the commercial rent review may be referred to the commercial rent judge (juge des loyers commerciaux).

Three-yearly review of the commercial rent

The right to a review every three years

Independently of any indexation clause, the commercial lease statute gives each party the right to request a rent review every three years. This three-yearly review is a statutory mechanism for adjusting the rent to changes in the rental market.

In principle, the revised rent must correspond to the rental value (valeur locative) (Article L. 145-33 of the French Commercial Code). However, unless it is proved that there has been a material change in the local factors of commerciality which has by itself caused a variation of more than 10% in the rental value, any increase or decrease resulting from a three-yearly review may not exceed the variation in the index of commercial rents or of tertiary activities rents that has occurred since the last agreed or judicial fixing of the rent (Article L. 145-38).

Conditions and limits of the three-yearly review

The request for review is made by extrajudicial instrument or by registered letter with acknowledgement of receipt and must state, on pain of nullity, the amount of the rent requested or offered (Article R. 145-20 of the French Commercial Code). It may be made only at least three years after the tenant took possession or after the start of the renewed lease, and the review takes effect from the date of the request (Article L. 145-38). Failing agreement, the matter is referred to the judge under the procedure on written submissions (procédure sur mémoires), the action being subject to a two-year limitation period (Article L. 145-60). On the timing of the request, its notification and the handling of a disagreement, see our step-by-step guide to the three-yearly review of the commercial rent.

Practical case: Thomas has run a restaurant since 2018 at a rent of €4,000 per month, with no indexation clause. In 2024, the landlord requests a three-yearly review. The ILC having risen by 15% since 2021 (the last review), the new rent may lawfully reach €4,600 per month. Thomas may negotiate or challenge the increase before the commercial rent judge if he considers it excessive.

The smoothing mechanism in the event of a large increase

Smoothing does not apply where the rent changes in line with the index. It applies where the rent escapes the cap: on a three-yearly review, where it is proved that there has been a material change in the local factors of commerciality which has by itself caused a variation of more than 10% in the rental value (Article L. 145-38 of the French Commercial Code), on review of a rent subject to a sliding-scale clause (Article L. 145-39), and on renewal where the cap is lifted (Article L. 145-34). In those cases, the resulting change in rent may not lead to increases, for any one year, of more than 10% of the rent paid in the previous year.

The increase is thus spread over annual steps that may not exceed 10% of the previous year's rent. These provisions apply to contracts entered into or renewed from 1 September 2014.

Increases on renewal of the lease

Freedom to fix the new rent

On renewal of the commercial lease, the landlord has in principle greater freedom to fix the new amount of the rent. This increase of commercial lease rents is no longer limited by changes in the indices alone, but may take account of changes in the rental value of the premises.

That freedom remains bounded by the principle of rental value, which corresponds to the rent the landlord could obtain by putting the premises back on the market under normal letting conditions.

The statutory cap on increases

Despite this apparent freedom, the law regulates excessive increases on renewal. The rent of the renewed lease must correspond to the rental value, determined by reference to the characteristics of the premises, the intended use of the premises, the respective obligations of the parties, the local factors of commerciality and the prices commonly charged in the neighbourhood (Article L. 145-33 of the French Commercial Code). For a lease of a term not exceeding nine years, however, the change in rent may not exceed that of the commercial rent index or the tertiary activities rent index, unless there has been a significant change in the first four elements of the rental value (Article L. 145-34). The cases where the cap is lifted and the conditions that the tenant may renegotiate are dealt with separately in our article on the renewal of the commercial lease.

Practical example: Sophie has run a clothes shop for 9 years at a rent of €1,800 per month. When the lease expires in 2024, the landlord offers renewal at €2,800 per month. An expert valuation shows that the actual rental value is around €2,200. Sophie may challenge the increase: failing a significant change in the elements of the rental value, the renewed rent will be fixed at the rental value within the cap resulting from the change in the index.

The challenge procedure

Actions brought under the commercial lease statute are subject to a two-year limitation period (Article L. 145-60 of the French Commercial Code). Disputes concerning the fixing of the rent of the renewed lease are brought before the president of the tribunal judiciaire (judicial court) of the place where the building is situated, who rules on written submissions (Article R. 145-23) and may order an expert valuation to determine the rental value.

Particular situations of increase

Improvement works carried out by the landlord

Where the landlord carries out improvement works to the let premises, it may legitimately ask for a corresponding rent increase. That increase must be proportionate to the improvement made and to the resulting increase in rental value.

The parties may agree contractually on how the works are to be passed on in the rent or, failing that, the judge may be asked to determine the justified increase.

Changes of use or of business

A change in the use of the premises (for example converting a shop into offices) or permission to carry on a more lucrative business may justify a commercial rent review during the lease, subject to the landlord's agreement.

Practical case: Julien runs a bookshop at a rent of €1,500 per month. He obtains the landlord's permission to convert the premises into a restaurant. This new use, which is commercially more attractive, justifies a renegotiation of the rent, which rises to €2,200 per month, in return for permission to change the business.

The impact of the commercial environment

Changes in the commercial environment of the premises may also justify rent adjustments. The opening of a shopping centre, improved public transport links or, on the contrary, the deterioration of the neighbourhood are objective factors in the change in rental value.

Negotiation strategies and dispute prevention

The importance of amicable negotiation

Before any litigation, amicable negotiation often remains the most effective way of resolving disagreements about the increase of commercial lease rents. It allows the parties to find a balance that takes account of the tenant's economic constraints and the landlord's legitimate expectations.

This negotiation may rely on objective elements: market comparisons, changes in the tenant's business, investments made by each party, and the prospects for the neighbourhood.

Amicable expert valuation as a tool for dialogue

Using an amicable expert valuation carried out by a commercial property professional can facilitate negotiations. Such a valuation makes it possible to put the rental value of the premises on an objective footing and to have a common basis for discussion between the parties.

Practical example: David has run a hair salon for 12 years. The landlord wants an increase of €400 per month on renewal. The parties agree to an amicable expert valuation, which shows a rental value justifying an increase of only €250. They finally agree on €300, thus avoiding lengthy and costly court proceedings.

Contractual anticipation of changes

Careful drafting of the initial lease makes it possible to anticipate the arrangements for increases and to reduce sources of dispute. The indexation clauses, the conditions of three-yearly review and the arrangements for renewal must be precisely defined.

Providing for mediation or adversarial expert valuation mechanisms in the event of disagreement is also a useful precaution to avoid litigation.

Remedies and contentious procedures

Referral to the commercial rent judge

If amicable negotiation fails, the parties may refer the matter to the commercial rent judge (juge des loyers commerciaux) of the tribunal judiciaire. This specialised court has exclusive jurisdiction to decide disputes relating to rent increases under commercial leases.

The parties are required to instruct a lawyer (Article R. 145-29 of the French Commercial Code) and the written submissions are signed by the parties' lawyers (Article R. 145-26). The judge may not be seised before the expiry of one month following receipt by its addressee of the first written submission (Article R. 145-27).

Court-appointed expert valuation

The judge frequently orders a court-appointed expert valuation to determine the actual rental value of the premises. This valuation, carried out by a sworn professional, is a decisive element in the final decision.

The expert takes into account all the elements that influence the rental value: characteristics of the premises, location, commerciality, the local market and recent developments in the sector.

Appeals

The decision of the commercial rent judge may be the subject of an appeal within one month. In cases of urgency or serious harm, summary proceedings (référé) may also be considered in order to obtain interim measures.

Practical advice and points of vigilance

For commercial tenants

• Check regularly how the reference indices are moving, in order to anticipate increases
• Negotiate the indexation clauses when the initial lease is signed
• Document any deterioration of the commercial environment that may justify a challenge
• Build up a file of market comparisons for renewal negotiations
• Observe scrupulously the time limits for challenge laid down by law

For landlords

• Draft the increase clauses in the initial lease with precision
• Follow changes in the indices and notify reviews within the time limits
• Carry out improvement investments in the premises to justify increases
• Monitor the rental market in order to assess the rental value correctly
• Favour dialogue and negotiation in order to maintain good landlord and tenant relations

Summary practical case: Laurent runs an IT services company in 200 m² premises let at €8,000 per month since 2019. The lease provides for annual indexation on the ILAT. In 2024, the landlord also requests a three-yearly review based on the change in the index since 2021. The ILAT having risen by 2.5% over one year and by 12% over three years, Laurent faces a cumulative increase bringing his rent to about €9,000 per month. He negotiates spreading the increase over 18 months in order to limit the impact on his cash flow.

The increase of commercial lease rents is a major issue requiring a rigorous and forward-looking approach. Command of the statutory mechanisms of indexation and review, amicable negotiation and the use of expert valuation are the keys to managing these changes successfully. Assistance from a real estate law professional is often indispensable to secure each party's interests and to prevent costly disputes.