Buying a flat in Paris or a house in the provinces usually starts with a shock for foreign buyers: months before the keys change hands, you are asked to sign a long private agreement, transfer a five-figure deposit to the estate agent or the notary, and accept that you are already bound. That document is the compromis de vente (preliminary sale agreement), and misunderstanding it is the single most expensive mistake an international buyer can make in France. Sign the wrong form, draft the loan condition loosely, or miss the ten-day withdrawal window, and you can lose your deposit or find yourself forced to complete a purchase you can no longer finance.
This guide explains the whole mechanism for non-French buyers: what the compromis is and how it differs from its unilateral cousin, where your deposit goes and when you get it back, how the ten-day right of withdrawal really runs, how to draft the mortgage condition so it protects you instead of trapping you, which documents must be attached, and how the file travels from the private signature to the final deed before the notary. The statutory texts are quoted in their current version as verified on 29 September 2026, and every decisive point is anchored in a Court of Cassation ruling with its official reference. Tax consequences of the purchase, in particular capital gains exposure for non-residents on a later resale, are flagged where they matter; detailed tax planning belongs in a separate advice file.
Paris real estate counsel see compromis disputes turn on four recurring questions: which type of preliminary contract was actually signed, whether the buyer applied for the loan exactly as described in the condition, whether the withdrawal was notified in time and in the right form, and whether the sum the seller kept was a reducible penalty or the non-reducible price of exclusivity. Each question is examined below.
I. What you actually sign: the nature, the money and the ten-day exit door
French law knows two very different preliminary contracts, and the parties’ label on the front page does not always decide which one they signed. The deposit regime, the withdrawal right and the fate of the money all flow from that classification, so it must be settled first.
A. Bilateral compromis or unilateral promise: why the distinction decides everything
The standard document, the compromis de vente (bilateral preliminary sale agreement), is a synallagmatic promise: both parties already consent to the sale, on the property and on the price, and only the completion is postponed. Article 1589 of the Civil Code states the governing principle: “La promesse de vente vaut vente, lorsqu’il y a consentement réciproque des deux parties sur la chose et sur le prix.” (Article 1589 of the Civil Code) In English, a promise of sale counts as a sale as soon as both parties mutually agree on the thing and the price. The practical consequence is blunt: once the conditions suspensives (conditions precedent) are fulfilled, either party can be forced to complete, and a buyer who simply walks away without a contractual or statutory exit faces a court order to sign plus damages. The compromis is not an option; it is the sale, suspended.
The alternative, the promesse unilatérale de vente (unilateral promise of sale), gives only one party an option. Article 1124 of the Civil Code defines it: “La promesse unilatérale est le contrat par lequel une partie, le promettant, accorde à l’autre, le bénéficiaire, le droit d’opter pour la conclusion d’un contrat dont les éléments essentiels sont déterminés, et pour la formation duquel ne manque que le consentement du bénéficiaire.” (Article 1124 of the Civil Code) In English, one party grants the other the right to choose to conclude a contract whose essential elements are already fixed, with only the beneficiary’s consent still missing. Here the buyer-beneficiary may lift the option or walk away; the seller-promisor may not sell to anyone else during the option period. Because the buyer pays for that exclusivity, the contract stipulates an indemnité d’immobilisation (consideration for keeping the property off the market), commonly 10 percent of the price, held by the notary.
That indemnity is legally different from a penalty, and the difference decides whether a judge can reduce it. On 16 January 2025 the Third Civil Chamber upheld an appeal court that had refused to reclassify an 80,000 euro immobilisation indemnity as a clause pénale (penalty clause) and ordered the defaulting buyers to pay it in full (Court of Cassation, Third Civil Chamber, 16 January 2025, No. 23-23.378, official decision). The Court approved the finding that the sum, in the judges’ words, “ne sanctionnant pas une inexécution contractuelle mais représentant le prix de l’exclusivité accordée aux bénéficiaires, celle-ci, qui ne constituait pas une clause pénale, ne pouvait être réduite par le juge.” In English: as the sum did not punish a breach of contract but represented the price of the exclusivity granted to the buyers, it was not a penalty clause and the judge could not reduce it. Foreign buyers must therefore read the deposit clause before signing: money described as the price of exclusivity in a unilateral promise is locked in once the option lapses unexercised, while a penalty clause in a bilateral compromis can be moderated by the court under Article 1231-5, since “le juge peut, même d’office, modérer ou augmenter la pénalité ainsi convenue si elle est manifestement excessive ou dérisoire.” (Article 1231-5 of the Civil Code) In English, the judge may on his own motion reduce or increase an agreed penalty that is clearly excessive or derisory.
A third, older mechanism still appears in private deals between individuals: the sale with arrhes (earnest money allowing withdrawal). Article 1590 provides: “Si la promesse de vendre a été faite avec des arrhes chacun des contractants est maître de s’en départir, Celui qui les a données, en les perdant, Et celui qui les a reçues, en restituant le double.” (Article 1590 of the Civil Code) In English, where a promise of sale is made with earnest money, either party may withdraw, the giver by forfeiting what was paid and the receiver by returning double. This mutual right to walk away, called dédit (contractual right of withdrawal against payment), is the opposite of the compromis logic and should never be stipulated by accident: a buyer who believes the 10 percent paid is mere earnest money, freely forfeited, while the document is drafted as a bilateral sale with a penalty, discovers the error when the seller sues for forced completion.
Where the money sits matters as much as what it is called. In professionally handled sales the deposit is placed in escrow, the séquestre (stakeholder escrow), usually with the notary, and it can only be released on joint instructions, on fulfilment or failure of the conditions as the contract provides, or by court order. Never transfer the deposit to the seller’s personal account. If the seller becomes insolvent before completion, a sum held by the notary is protected in a way a direct transfer is not, and every later argument about restitution starts from the escrow receipt.
B. The ten-day withdrawal right: who gets it, when it runs and how to use it
For residential property, the non-professional buyer holds a statutory right of withdrawal, the droit de rétractation (cooling-off right), even after signing a binding compromis. Article L. 271-1 of the Construction and Housing Code provides: “l’acquéreur non professionnel peut se rétracter dans un délai de dix jours à compter du lendemain de la première présentation de la lettre lui notifiant l’acte.” (Article L. 271-1 of the Construction and Housing Code) In English, a non-professional buyer may withdraw within ten days starting the day after the first presentation of the letter notifying the act. Three elements of that sentence deserve close attention from foreign buyers.
First, the beneficiary is the non-professional buyer of residential property. A buyer acting for professional purposes, and in principle a property dealer or a company whose business is real estate, cannot invoke it. Spouses buying jointly each hold the right, and any clause attempting to waive it in advance is void. Second, the trigger is formal notification: registered letter with acknowledgment of receipt or any equivalent means guaranteeing the date of receipt, or, where the sale is handled through a mandated professional, direct handover against receipt under conditions set by decree. The contract itself may be handed over by the agent, but the withdrawal period then runs from the day after that documented handover. Third, the withdrawal itself must be exercised in the same forms, by registered letter or equivalent, and it needs no justification and triggers full restitution of everything paid, including the escrowed deposit, with no penalty whatsoever.
Two Court of Cassation rulings fix the mechanics that most often trap buyers. The older one, from the First Civil Chamber, dealt with a compromis notified twice to an address where the buyer could not be reached, the first letter returning marked undeliverable and the second unclaimed. The Court recalled the then seven-day version of the rule: “l’acquéreur non professionnel peut se rétracter dans un délai de sept jours à compter du lendemain de la première présentation de la lettre lui notifiant l’acte” (Court of Cassation, First Civil Chamber, 14 February 2018, No. 17-10.514, official decision) In English, the buyer could withdraw within seven days from the day after first presentation, the period now extended to ten days. The lesson for buyers abroad is direct: give the notary and the agent a reliable French delivery address or an authorised representative for service, because presentation at the address you supplied can start the clock whether or not you actually collect the letter, and a buyer who learns of the signature late may discover the window already closed.
The newer ruling settles a calculation dispute that had divided practitioners: whether the day after first presentation must itself be excluded a second time under the general procedural rule for day-counted periods. The Third Civil Chamber held that Article L. 271-1 and Article 641 of the Code of Civil Procedure express the same rule, so “Il en résulte que leurs effets ne se cumulent pas.” (Court of Cassation, Third Civil Chamber, 19 December 2024, No. 23-12.652, official decision) In English, it follows that their effects do not accumulate. Concretely, the ten days run from the day after first presentation without adding an extra day, and the period expiring on a Saturday, Sunday or public holiday is extended to the next working day. Count the days on a calendar before acting: a buyer notified on a Friday who assumes two full weekends of reflection may already be out of time.
Foreign buyers should also note what the withdrawal right does not do. It does not extend to the seller, who is bound from signature. It does not apply to all preliminary contracts: promises concerning non-residential property, shares in property companies outside the listed cases, or forest land, follow their own regimes. And it operates independently of the loan condition examined below: a buyer who withdraws in time recovers the deposit without having to prove any loan refusal.
II. From signature to keys: conditions, documents and the authentic deed
A well-drafted compromis is a timetable with legal teeth: each condition names its deadline, its proof and its consequence. The three conditions that decide most foreign-buyer files are the mortgage condition, the planning and co-ownership inquiries, and the technical diagnostics file. Around them sits the notary’s conveyancing work, ending in the acte authentique (notarial deed of sale) that alone transfers ownership against third parties.
A. The mortgage condition and its siblings: drafting the clauses that save or sink the purchase
Most foreign buyers need French or cross-border credit, and the condition suspensive d’obtention de prêt (condition precedent of obtaining a loan) is their principal protection. But the protection only works if the clause mirrors the buyer’s real financing project with surgical precision: amount, maximum nominal rate, maximum duration, and type of loan. Article 1304-6 of the Civil Code states the stakes of failure: “En cas de défaillance de la condition suspensive, l’obligation est réputée n’avoir jamais existé.” (Article 1304-6 of the Civil Code) In English, if the condition precedent fails, the obligation is deemed never to have existed, and the escrowed deposit must be returned in full. Conversely, Article 1304-3 punishes bad faith: “La condition suspensive est réputée accomplie si celui qui y avait intérêt en a empêché l’accomplissement.” (Article 1304-3 of the Civil Code) In English, a condition precedent is deemed fulfilled where the party interested in it prevented its fulfilment.
The Court of Cassation applied that second text with full severity in June 2026. A buyer holding a promise for a 1,475,000 euro loan over 25 years at a maximum nominal rate of 1.75 percent had applied for two loans at 1.30 percent, and the appeal court had accepted those applications as compliant because the lower rate was not disproportionate to the ceiling. The Third Civil Chamber quashed: “Aux termes de ce texte, la condition suspensive est réputée accomplie si celui qui y avait intérêt en a empêché l’accomplissement.” (Court of Cassation, Third Civil Chamber, 25 June 2026, No. 24-14.137, official decision) In English, under that provision a condition is deemed fulfilled where the interested party prevented it. Having found that the buyer sought loans at a rate below the contractual terms, the appeal court had drawn the wrong legal conclusion; the condition was fictitiously fulfilled, the promise stood, and the immobilisation indemnity claim revived. The message for buyers is uncompromising: apply for at least the contractual amount, at the contractual rate ceiling and duration, from the contractually required number of banks, keep every refusal letter, and never file a deliberately non-conforming application hoping the condition will simply fail.
An earlier ruling points the same way from the seller’s side. Where buyers bound by a loan condition and a penalty clause were condemned to pay 36,000 euros, the Court rejected their appeal, the case turning on the old Article 1178, now Article 1304-3, under which “la condition est réputée accomplie lorsque c’est le débiteur, obligé sous cette condition, qui en a empêché l’accomplissement” (Court of Cassation, Third Civil Chamber, 29 March 2018, No. 17-18.651, official decision) In English, the condition is deemed fulfilled where the debtor bound under it prevented its fulfilment. A buyer who files no serious application, misses the contractual filing deadline, or conceals a refusal while negotiating privately, is treated as if the loan had been granted and remains bound to buy or to pay the penalty.
Three sibling conditions deserve equal care. The planning condition covers the certificat d’urbanisme (planning information certificate) and, for houses, the absence of a pre-emption right, the droit de préemption urbain (municipal right of pre-emption), which in Paris is exercised routinely and can substitute the city for the buyer at the same price. The co-ownership condition covers the seller’s disclosure pack: the last three years of general meeting minutes, the building’s financial health, the plan pluriannuel de travaux (multi-year works plan) with its special assessments, and any ongoing litigation. Foreign buyers of Paris flats should read the minutes for pending facade, lift or roof works, because the special assessment voted after the compromis but before completion can fall on the buyer depending on the clause. The diagnostics condition covers the dossier de diagnostic technique (statutory survey file): lead, asbestos, termites, energy performance, gas and electricity, noise and natural risks. An absent or outdated survey does not merely inform negotiation; for several diagnostics the seller’s liability for hidden defects turns on it, and the buyer should make completion conditional on receiving the full file before the withdrawal period expires where possible.
Deadlines knit these conditions together. Each condition names a calendar date and the proof required, typically registered letters of loan refusal or the notary’s written confirmation. If a condition’s date passes without either fulfilment or a documented extension signed by both parties, the contract’s own machinery applies: automatic lapse, return of the deposit, or, where the clause so provides, a negotiated extension. Extensions by email with the agent alone, unsigned by the seller, have generated a steady stream of litigation; insist on a written amendment, the avenant (contractual amendment), signed by both parties and, ideally, drawn up by the notary holding the escrow.
B. The road to the authentic deed: notary, delays, Paris practice and foreign-buyer traps
Between the compromis and the final signature lies the conveyancing period, usually ten to twelve weeks, during which the buyer’s notary, the notaire (public officer conveying officer), verifies title over thirty years, checks mortgages and charges, serves the pre-emption notices, collects the co-ownership documents, and computes the final price with its pro-rata adjustments for property tax, co-ownership charges and rents. Buyers from common-law systems should understand that the notary is a neutral public officer, not the buyer’s advocate: each party may appoint its own notary at no extra proportional cost, the fee being shared, and foreign buyers routinely do so when the file involves cross-border funds or powers of attorney.
Five traps catch international buyers at this stage. The first is the power of attorney. A buyer who cannot attend completion in France signs a procuration authentique (notarial power of attorney), which for a buyer residing abroad generally means visiting the French consulate or a local notary with an apostille, plus a certified translation where required. Consular appointments in London, New York or Dubai can take weeks, so the power should be arranged as soon as the compromis is signed, not when the completion date arrives. The second is the money trail. French anti-money-laundering rules require the notary to document the origin of funds, and transfers must arrive from an account in the buyer’s name in time for the pre-completion settlement statement. Last-minute transfers from a third party, a family company or a crypto conversion routinely delay completion and can breach the contractual date, exposing the buyer to the penalty clause. The third is the exchange-rate gap: a buyer financing in pounds or dollars against a euro price should secure the rate or budget a margin, because the compromis price is fixed in euros and the seller owes no discount for currency movement.
The fourth trap is specific to Paris and the inner suburbs. Co-ownership charges in Haussmann buildings, mandatory works voted under the multi-year plan, the special taxation of furnished rentals, and the city’s systematic pre-emption in designated sectors all weigh more heavily in Paris than in the provinces. The compromis for a Paris flat should therefore name the exact lot numbers with their common-area shares, allocate the current year’s works between seller and buyer euro by euro, and fix who bears the assessment if the general meeting votes new works between signature and completion. Early review of the Paris co-ownership pack by real estate counsel admitted in Paris regularly pays for itself against a single overlooked special assessment. The competent court for a later dispute over the sale is the judicial court of the property’s location, so the Paris judicial court for a Paris acquisition, and foreign buyers should keep a French address for service or a mandated agent until every post-completion deadline, including the one-year action for hidden defects, has expired.
The fifth trap is fiscal and must be flagged without being solved here. Non-resident buyers face a distinct tax landscape: annual property taxes with no automatic non-resident relief, wealth-tax exposure above the threshold for large estates, and, on resale, capital gains tax with a non-resident surcharge mechanism and the possible requirement of a représentant fiscal (tax representative) to handle the return. Holding through a société civile immobilière (family property company) changes the income-tax, wealth-tax and succession picture in ways that depend entirely on the buyers’ residence country and family structure. None of this should be improvised at the compromis stage on the basis of a general guide: the compromis should record the chosen holding structure and the financing precisely, because banks, notaries and the tax administration will all rely on those recitals later.
If everything proceeds, the file closes with the acte authentique (notarial deed of sale) signed before the notary, funds disbursed through the notary’s escrow, the deposit imputed on the price, and ownership published at the land registry. If it fails, the contract allocates the wreckage: withdrawal in time means full restitution, failure of a genuine condition means restitution, fictitious fulfilment or unjustified refusal means the seller keeps the penalty or sues for completion. Each outcome presupposes documents: refusal letters matching the clause, dated notifications, escrow receipts and signed amendments. The foreign buyer who keeps that file complete from day one holds every exit the contract promised; the buyer who improvises discovers, usually too late, that French sale law rewards only the documented.
Conclusion
The compromis de vente is neither a reservation nor a formality. It is the sale itself, concluded under conditions, with money held in escrow and a ten-day withdrawal right that runs from formal notification without doubling its starting day. The bilateral form binds both parties to complete once the conditions are met, while the unilateral form sells exclusivity for a price the judge cannot reduce. The loan condition protects only the buyer who applies exactly as the clause requires, with conforming applications and written refusals, because a prevented condition is deemed fulfilled and the penalty follows. Diagnostics, planning, pre-emption and co-ownership documents each carry their own deadlines, and the road to the authentic deed runs through a neutral notary, a documented money trail, and, in Paris, a careful allocation of works and charges. Drafted precisely, notified formally and documented throughout, the compromis gives a foreign buyer a secure path from offer to keys; drafted loosely, it becomes the most expensive signature of the purchase.