Promise of Sale: Essential Clauses to Include

Drafting a promise of sale (promesse de vente) is a crucial step in any property transaction. This legal document, which formally commits the seller to transfer their property on specified terms, calls for particular attention to the clauses it contains. A poorly drafted promise of sale can lead to major legal complications, delays in the transaction and even outright cancellation of the sale. For property professionals and private individuals alike, mastering the essential clauses of a promise of sale is therefore indispensable to securing their property transactions in 2026.

The legal basis of the promise of sale

The unilateral promise of sale (promesse unilatérale de vente) is governed by Article 1124 of the French Civil Code: the promisor grants the beneficiary the right to opt for the conclusion of a contract whose essential terms are determined and for whose formation only the beneficiary's consent is lacking. Revoking the promise during the period given to the beneficiary to opt does not prevent the promised contract from being formed. Article 1589 of the French Civil Code, under which a promise of sale is equivalent to a sale where there is mutual consent of both parties on the thing and the price, governs the bilateral promise, commonly called the preliminary sale agreement (compromis). What distinguishes this instrument from the compromis, as regards each party's obligations, is explained in our article comparing the compromis and the promise of sale.

Key points of the legal framework:

• Article 1124 of the French Civil Code defines the unilateral promise and deprives its revocation of effect during the option period • Only the promisor is bound; the beneficiary remains free to exercise the option or not • Article 1589-2 of the French Civil Code makes void any unilateral promise to sell real property that is not recorded in an authentic instrument or in a private instrument registered within ten days of its acceptance by the beneficiary • Article 1170 of the French Civil Code deems unwritten any clause that deprives the debtor's essential obligation of its substance; an ambiguous clause is not deemed unwritten, it is interpreted

Standard form promises of sale circulated online take account neither of the particular features of each transaction nor of recent changes in the legislation.

Precise identification of the property

Detailed description of the property

The description of the property is one of the most critical clauses of a promise of sale. It must be exhaustive and include every element needed to identify the building precisely.

Essential items to state:

• Municipality where the property is located • Cadastral section and plot number • Cadastral area • Nature of the premises (house, flat, commercial premises) • Floor and position within the building • References of the title deed

Example of an identification clause: "A dwelling house located in [Town], registered in the cadastre under section AB number 123, with a cadastral area of 500 m², acquired by notarial deed of [date] received by Maître [Name], notary in [Town], published at the land registry (service de publicité foncière) of [Place] on [date], volume [X], number [Y]."

Legal and administrative references

For properties in co-ownership (copropriété), the description must be even more precise:

• Co-ownership lot number • Share of the common parts • References of the co-ownership rules (règlement de copropriété) • Descriptive statement of division

Determination of the price and financial terms

Setting the sale price

The price is an essential element of a property contract. Case law requires that it be determined, or determinable, on an objective basis. How the price is expressed at the negotiation stage is covered in our guide to drafting an offer to purchase property.

Mandatory statements concerning the price:

• Exact amount in euros • Statement of "net to the seller" or costs borne by the buyer • Payment terms • Amount of the immobilisation indemnity (indemnité d'immobilisation)

Example of a price clause: "The sale price is set at €350,000 (three hundred and fifty thousand euros) net to the seller, with all costs, duties and taxes borne by the buyer. An immobilisation indemnity of €17,500 (5% of the price) shall be paid on signature of this document."

Terms of payment of the price

A well-drafted property contract must specify:

• Amount of the indemnity and conditions for paying it • Financing conditions • Payment deadlines • Terms for the release of funds

The essential conditions precedent

Condition precedent of obtaining a loan

This condition, imposed by Article L. 313-41 of the French Consumer Code where the price is paid with the help of one or more property loans, must state precisely:

• Amount of the loan applied for • Maximum term of the loan • Maximum acceptable interest rate • Lenders envisaged • Deadline for obtaining approvals

Example of a financing clause: "This sale is concluded subject to the condition precedent that the buyer obtains a property loan of €280,000 over a maximum of 25 years, at an overall effective rate not exceeding 3.5% per annum, from any bank of their choice, within 45 days of the signature of this document."

Other common conditions precedent

Property surveys and diagnostic reports may be made the subject of conditions precedent:

• Energy performance diagnostic (DPE) • Asbestos survey (properties built before 1997) • Lead survey (properties built before 1949) • Termite survey (infested areas)

Specific conditions depending on the property:

• Obtaining planning permission (permis de construire) • Clearing of the urban pre-emption right (droit de préemption urbain) • Waiver by forced heirs • Administrative regularisation

The seller's obligations and guarantees

The seller's duty to provide information

The seller must provide a set of precise information:

Mandatory documents: • Complete technical diagnostic file • Information on easements (servitudes) • Co-ownership charges (last 3 years) • Statement of risks and pollution • Minutes of general meetings

Example of an information clause: "The seller hands the buyer all mandatory technical diagnostic reports that are currently valid, together with the last three co-ownership service charge demands and the minutes of the general meetings for the last three years."

Statutory and contractual guarantees

Guarantees may be adjusted by contract:

• Guarantee against eviction • Guarantee against latent defects • Floor area guarantee (Carrez Act) • Guarantee of compliance with standards

The duration and manner of exercise of the option

Determining the duration of the option

The duration of the option must be precise and appropriate:

Commonly accepted durations: • Standard sales: 2 to 4 months • Complex conditions precedent: up to 6 months • Administrative procedures: specific time limits

Example of a duration clause: "This option is granted for a period of three months from the signature of this document, that is until [exact date] inclusive."

How the option is exercised

The terms must be explicit:

• Form of notification (registered post with acknowledgement of receipt recommended) • Required notice period • Supporting documents to be produced • Consequences of exercising or not exercising the option

Example of an exercise clause: "The option shall be exercised by registered letter with acknowledgement of receipt, accompanied by evidence that the conditions precedent have been satisfied, sent to the seller at least 15 days before the option period expires."

Termination and penalty clauses

Termination clauses

The breaches that may lead to termination must be listed:

Frequent grounds for termination: • Failure to meet contractual deadlines • Failure to pay the indemnity • Failure to produce the required supporting documents • Breach of the conditions precedent

Penalty clauses and indemnities

The immobilisation indemnity follows a specific regime:

• Amount generally between 5% and 10% of the price • Remains payable to the seller if the beneficiary withdraws • Is not a penalty clause and therefore cannot be reduced by the court (Cour de cassation, 3rd Civil Chamber, 30 April 2002, No. 00-16.422; Cour de cassation, 1st Civil Chamber, 6 October 2021, No. 19-15.035)

The penalty clause, which is distinct from the immobilisation indemnity, is covered in our guide to the penalty clause in a preliminary sale agreement, which sets out its conditions of validity, how it is triggered and how it is calculated.

Securing the promise of sale legally

To maximise the legal security of your transaction, several precautions are needed:

Pitfalls to avoid with free templates

A free template promise of sale carries major risks:

• Standard clauses unsuited to your situation • Failure to reflect recent developments in case law • No tailoring to the property • Gaps in the conditions precedent

Advantages of professional support

Consulting a professional makes it possible to:

• Adapt the clauses to the specific features of the transaction • Anticipate potential difficulties • Incorporate the latest legal developments • Secure the transaction effectively

Essential points of vigilance

Before signing, check:

Security checklist: • Compliance with the statutory information obligations • Precision of the conditions precedent • Consistency of time limits and terms • Proportionality of penalties • Adaptation to the specific features of the property

Example of an overall security clause: "The parties declare that they have been informed of the legal and tax consequences of this promise, and that they have had the benefit of the advice of their respective advisers. They expressly waive any right to rely later on a lack of information or advice."

Conclusion and next steps

Drafting a promise of sale requires a thorough command of the applicable legal rules and a precise knowledge of case law in property matters. Contrary to received wisdom, using a free template promise of sale downloaded from the internet exposes the parties to considerable legal and financial risks.

Practical steps to take:

1. Assess your specific needs according to the nature of your property and your situation
2. Gather all the documents needed to draft the instrument
3. Consult a qualified professional for tailor-made drafting
4. Negotiate the conditions in light of the specific features of your transaction

Investing in professional legal support is a guarantee of security for all parties to the transaction. Property law practitioners strongly recommend not settling for a standard property contract, but having each promise of sale adapted to the specific features of the intended transaction.