Deposit contract in Spain: the point where a property purchase is won or lost

The riskiest moment in a Spanish property purchase is often not the notary signing. It is the earlier moment when everyone feels the deal is “basically agreed”, but the conditions are still scattered across a WhatsApp thread, an email chain, a verbal promise, and an unsigned reservation form.

That is where good purchases start to become fragile.

A deposit contract, often called an arras contract in Spain, can be a useful way to secure a property and organise the path to completion. It can also create serious pressure if the buyer signs before checking documents, confirming financing, agreeing deadlines, or understanding what happens if one party withdraws.

This guide is practical orientation for buyers in Barcelona, Catalonia and Spain. It is not legal advice. Before signing or paying a meaningful amount, you should have the contract reviewed by a qualified lawyer, notary or adviser familiar with the transaction.

A deposit contract is not just a receipt

Spain’s notaries explain that, before the public deed is signed, some buyers and sellers sign a previous document commonly known as arras. They also make two points buyers should take seriously: this document is not obligatory, but if signed, the law treats it as a valid contract that the parties are obliged to comply with (Spanish notaries).

That means a deposit contract should never be treated as a casual payment slip.

In practice, the contract should answer the questions that make or break the purchase:

• Who is selling, and does every required seller sign?
• What exact property is being sold, including annexes, parking, storage, terrace rights or furniture?
• What deposit amount is paid, to whom, when and by which method?
• Is the amount paid on account of the price?
• What documents has the buyer reviewed before signing?
• What happens if the mortgage is refused?
• What is the deadline for signing before the notary?
• What happens if the buyer withdraws?
• What happens if the seller withdraws or cannot sell?
• Which costs, taxes, community debts or pending obligations remain with each party?

A vague reservation may feel faster. A precise contract is usually calmer.

The difference matters because the buyer’s money is no longer theoretical after signing. The seller may stop marketing the property. The buyer may stop looking. The bank may begin valuation. Lawyers may review title, debts and building documents. The notary date starts to become real.

At that point, “we understood it differently” is not a strategy.

The legal effect depends on the wording

A common mistake is assuming that every arras contract has the same consequence: if the buyer withdraws, the buyer loses the deposit; if the seller withdraws, the seller returns double.

That can be true in some cases, but it is not a safe assumption.

Article 1454 of the Spanish Civil Code states that, if arras or a deposit have been involved in a purchase contract, the contract may be rescinded with the buyer agreeing to lose them or the seller returning them doubled (BOE, Civil Code art. 1454). That is the rule many people have heard in simplified form.

Catalonia needs extra care. Article 621-8 of Book Six of the Catalan Civil Code says that money delivered by the buyer to the seller is understood as confirmatory arras by default: a sign that the sale has been concluded and an amount paid on account of the price. The same article says penitential arras must be expressly agreed. If the buyer withdraws under expressly agreed penitential arras, the buyer loses them; if the seller withdraws, the seller must return them doubled (BOE, Law 3/2017 consolidated text).

Put differently: in Catalonia, do not rely on the word arras alone. The contract should say what type of arras they are and what consequence follows from each party’s decision or default.

This is not a detail for lawyers to tidy later. It changes the buyer’s risk. A contract designed as a firm commitment to complete is not the same as a contract that gives both parties a paid exit mechanism. The commercial language may look similar. The legal effect may not be.

The reservation stage is where ambiguity enters

Many problems begin before the formal deposit contract.

A buyer likes the property. The seller wants a quick sign of commitment. An agency sends a reservation document. Someone writes “we accept the offer” by email. A message says the property will be taken off the market. Another message says the deposit will be returned if “something serious” appears. Nobody defines what serious means.

This is the dangerous grey area.

A verbal agreement can create expectations. WhatsApp and email can record parts of a negotiation. An unsigned reservation can look official without clearly binding the parties. A payment can be described as a reservation, signal, deposit, arras, good-faith amount or amount on account. Those words are not interchangeable in practice.

Before sending money, the buyer should ask for the basic structure in writing:

• whether the payment reserves the property or forms part of a binding purchase contract;
• whether the seller can continue showing the property;
• whether the buyer can recover the payment if documents reveal a problem;
• whether the payment will be held by the seller, agency, lawyer or another party;
• when the full deposit contract must be signed;
• what happens if the parties do not agree the later contract wording.

The safest reservation is not the longest one. It is the one that says exactly what it does and does not do.

For buyers still reviewing title, debts, ITE, community minutes or mortgage viability, the reservation should not pretend that all due diligence is finished. Our guide to what to check before making an offer on a Barcelona property explains the document-review side in more detail.

Deadlines should match the real purchase path

A deposit contract often fails because the dates were copied from a template instead of built around the buyer’s actual situation.

A cash buyer with funds already in Spain may be able to move quickly. A non-resident buyer who needs a NIE, bank account, mortgage valuation, translated income documents and international transfers may need more time. A seller dealing with several titleholders, an inheritance, a mortgage cancellation or a company signature may also need more margin.

The contract should make the calendar visible:

• deadline to deliver missing property documents;
• deadline for the buyer’s legal review;
• deadline for mortgage approval, if financing is relevant;
• deadline for valuation;
• deadline for choosing or confirming the notary;
• final date for signing the public deed;
• what happens if the notary date is delayed for reasons outside one party’s control.

Catalan law also contains a specific financing provision. Article 621-49 of the Catalan Civil Code states that, if the purchase contract provides for financing by a credit institution, the buyer may withdraw if they document, within the agreed period, the refusal by the named institution to grant financing or accept subrogation, unless the refusal results from the buyer’s negligence. The same article provides for return of the price already paid and, where applicable, penitential arras (BOE, Law 3/2017 consolidated text).

That does not mean every buyer is automatically protected if the bank says no. The financing condition needs to be written into the transaction correctly. It should name what approval is required, by when, from whom, what evidence is needed and what happens if the buyer simply fails to provide documents.

A mortgage clause that says “subject to financing” may be too vague. A better clause explains the mechanism.

What should be checked before signing

Spain’s notaries advise buyers to inform themselves before signing any agreement or paying money. Their buying guidance specifically points to who signs for the seller, whether there are charges, whether the owner is up to date with payments and whether there are future community assessments already approved (Spanish notaries).

That list is a good starting point, especially in Barcelona apartment buildings.

Before signing a deposit contract, a buyer should normally review or request:

• an updated nota simple from the Land Registry;
• the identity and authority of every seller;
• mortgage charges, embargoes, usufructs or other registered rights;
• community debt certificate or confirmation from the administrator;
• approved special assessments, known as derramas;
• recent community minutes, where relevant;
• IBI/property tax status;
• ITE and certificate of aptitude for older buildings where applicable;
• habitability certificate and energy certificate where relevant;
• licences, occupancy or planning questions if the property has unusual works or uses;
• what furniture, appliances, parking spaces, storage rooms or fixtures are included.

This is where buyers sometimes feel pressure. The property is attractive, the seller is impatient, and another interested buyer may exist. But signing quickly does not make an unclear file clean. It only moves the uncertainty into a contract with consequences.

If a document is missing, the contract can sometimes handle that with a condition, deadline or retention. If the issue is material, the buyer may need to delay signing or renegotiate. The wrong move is to sign a strong commitment while treating the missing document as a small administrative detail.

The small clauses that carry large consequences

The main price and deposit amount get most of the attention. The smaller clauses often decide whether the transaction feels controlled.

A well-drafted deposit contract should make these points explicit:

• Property description: not just the address, but the registered property, annexes and any elements the buyer expects to receive.
• Included items: furniture, appliances, lighting, built-ins, parking, storage and any branded or high-value fixtures.
• Condition at completion: whether the property must be delivered vacant, with utilities active, free of occupants, free of tenants or free of certain charges.
• Seller obligations: delivery of documents, cancellation of mortgages, settlement of community debts, tax or charge handling.
• Buyer obligations: payment schedule, financing steps, document delivery to the bank, notary preparation and transfer timing.
• Notary date: who chooses the notary, what happens if the date must move and whether time is an essential term.
• Default and withdrawal: what counts as default, what notice must be given and what financial consequence follows.
• Jurisdiction and applicable law: especially important when one or both parties are foreign or not resident in Spain.

One practical test helps: if a disagreement appeared two weeks before notary, could the contract answer the question without reconstructing old messages?

If the answer is no, the wording is probably not ready.

The aim is not to make the contract hostile. It is to make the commitment legible. A seller also benefits from clarity: a buyer who has reviewed the file, aligned financing and accepted written deadlines is usually more serious than one who signs fast and discovers problems later.

How buyers should use advisers

The notary has an important role in the Spanish purchase process, especially at the public deed stage. Spain’s notaries highlight the security provided by the public deed and the notary’s checks. But a buyer should not wait until the day of completion to understand the private contract already signed.

The deposit contract usually comes earlier. That is when the buyer’s lawyer or adviser should review the file, negotiate conditions and check whether the contract reflects the real transaction.

For foreign buyers, the coordination is often wider:

• lawyer for legal review and contract negotiation;
• mortgage broker or bank for financing viability;
• tax adviser for ownership structure and non-resident implications;
• translator where the buyer cannot comfortably read the Spanish or Catalan documents;
• relocation or property adviser to keep the calendar realistic.

This is especially important when the buyer is outside Spain. Powers of attorney, international transfers, bank compliance checks and document translation can all affect timing. If the contract ignores those steps, the buyer may be technically in breach even while acting in good faith.

We cover the broader buyer path in buying property in Barcelona as a foreigner in 2026. The deposit contract is where that broader preparation becomes concrete.

A practical pre-signing checklist

Before signing a reservation or deposit contract, pause and confirm the following in writing:

1. The seller side is identified, and every necessary person or representative will sign.
2. The property description matches the Land Registry and what you visited.
3. The deposit amount, payment route and holder of funds are clear.
4. The contract states whether the payment is confirmatory, penitential or another agreed structure.
5. In Catalonia, any penitential arras effect is expressly agreed, not assumed.
6. The mortgage condition is written with deadlines, evidence and consequences.
7. The document-review period is realistic and tied to specific documents.
8. The notary date matches the buyer’s NIE, banking, financing and travel constraints.
9. Furniture, appliances, parking, storage and other included items are listed.
10. Community debts, approved assessments and mortgage cancellations are allocated.
11. Withdrawal and default consequences are clear for both buyer and seller.
12. Any verbal promise, WhatsApp message or email condition that matters has been moved into the signed text.

The contract does not need to solve every possible future problem. It does need to stop the predictable ones from being left to memory.

How Lasose helps buyers avoid the wrong kind of speed

The best property purchases do not move slowly. They move in the right order.

At Lasose Real Estate, we help buyers organise the step between interest and commitment: checking the property file, coordinating questions with the seller side, aligning the offer with financing reality and making sure important conditions are not left as informal messages.

A deposit contract should feel like confirmation of a well-understood purchase, not a leap of faith. Before you sign, make the agreement specific enough that the next steps are clear: what is being bought, who is bound, what must happen before notary, and what each party has agreed if the plan changes.

That is often where the purchase is won or lost.