Reservation Contract vs Private Purchase Contract in Spain: What Property Buyers Need to Know

International buyers purchasing property in Spain quickly encounter several terms that can sound interchangeable:

reservation agreement

private purchase contract

arras

deposit

señal

They are not necessarily the same thing.

And assuming that they are can create expensive mistakes.

A relatively short reservation document can carry important obligations.

A large payment described casually as a “deposit” may have very different consequences depending on the wording of the contract.

And the familiar rule that a buyer simply loses the deposit while the seller returns double does not automatically apply to every property deposit in Spain.

The most important rule is therefore simple:

do not judge a property contract by its title.

Read what the document actually says.

This guide explains how reservation agreements and private purchase contracts commonly fit into a Spanish property transaction and what international buyers should understand before transferring money.

The Typical Spanish Property Purchase Sequence

There is no single mandatory sequence used in every Spanish property sale.

However, a Marbella resale transaction often follows a structure broadly similar to:

1. property selected;

2. price and commercial terms negotiated;

3. reservation agreement;

4. legal due diligence;

5. private purchase contract;

6. completion before a Spanish notary.

EQUA's existing Buying Property in Spain: A Complete Guide describes reservation, due diligence, a private purchase contract and final notarial completion as common stages in the buying process.

But the precise legal effect of each stage depends on the documents signed in the individual transaction.

What Is a Reservation Agreement?

A reservation agreement is commonly used to take a property off the active market for a limited period while the transaction moves forward.

It may establish:

• property being reserved;

• agreed purchase price;

• reservation amount;

• reservation period;

• buyer and seller details;

• conditions;

• next contractual step.

The buyer normally pays a reservation amount when the document is signed.

The amount varies.

There is no Spanish law stating that every reservation must be a fixed percentage of the purchase price.

What Is the Purpose of a Reservation?

Commercially, a reservation can create breathing room.

The buyer may need time for:

• lawyer review;

• Land Registry checks;

• mortgage preparation;

• technical inspection.

The seller may agree to stop actively marketing the property while those steps take place.

This can be particularly useful in Marbella where a well-priced property may attract several buyers.

Reservation Does Not Automatically Mean Fully Refundable

One of the most dangerous assumptions is:

“It is only a reservation, so I can always get my money back.”

That is not necessarily true.

Refundability depends on the agreement.

The document should explain what happens if:

• the buyer changes their mind;

• legal due diligence reveals a significant issue;

• financing fails;

• the seller withdraws;

• the parties cannot progress to the next contract.

These provisions should be understood before payment.

Reservation Is Not Automatically Non-Refundable Either

The opposite assumption is also wrong.

Some reservation agreements expressly protect the buyer where certain conditions are not satisfied.

For example, a reservation may be expressly subject to:

• satisfactory legal due diligence;

• mortgage approval;

• specific documentation.

If such protection is important, it should be clearly written.

Do not rely on an informal verbal assurance such as:

“Don't worry, you'll get the deposit back.”

Who Receives the Reservation Money?

The buyer should know exactly:

• who receives the money;

• in what capacity;

• where it is held;

• under what contractual terms.

Possible arrangements vary between transactions.

Do not transfer reservation money simply because somebody sends bank details by WhatsApp or email.

Your lawyer should confirm the documentation and payment instructions where appropriate.

What Is a Private Purchase Contract?

A private purchase contract — often referred to in Spanish as a contrato privado de compraventa — usually represents a much more developed stage of the transaction.

By this point, the agreement commonly sets out detailed terms covering:

• parties;

• property;

• price;

• amounts already paid;

• further deposit;

• completion date;

• furniture or contents;

• allocation of expenses;

• consequences of default.

The contract may also incorporate some form of arras arrangement.

This is where terminology becomes especially important.

A Private Contract Can Be Legally Binding Before the Notary

Many international buyers assume:

“The purchase only becomes real when I sign at the notary.”

That is too simplistic.

Under the Spanish Civil Code, a contract exists when the required elements of consent, object and cause are present, and consent is manifested through corresponding offer and acceptance. Articles 1261 and 1262 set out those general principles.

For a sale specifically, Article 1450 states that the sale becomes binding between buyer and seller when they have agreed the property and the price, even though neither has yet been delivered.

This is why private property contracts should never be viewed as mere administrative paperwork.

Does Signing a Private Contract Transfer Ownership?

Not necessarily.

The contractual obligation to sell and the transfer of property ownership are separate legal concepts.

A private contract can create binding obligations before the final notarial completion and transfer process.

International buyers do not need to master the technical legal distinction themselves.

They simply need to understand this:

signing privately can create serious obligations long before you receive the keys.

What Are Arras?

The word arras is often translated loosely as “deposit.”

But Spanish legal practice recognises different functions that an advance payment can serve.

The most commonly discussed categories are:

• confirmatory arras;

• penal arras;

• penitential arras.

The legal consequences are not the same.

This is why the label alone is not enough.

Arras Confirmatorias

Confirmatory arras broadly function as evidence or part-performance of an existing contract.

They reinforce that a transaction has been agreed.

They do not automatically create a free right for either party simply to walk away.

Depending on the agreement and circumstances, breach can potentially give rise to enforcement or other remedies.

Arras Penales

Penal arras are used to reinforce performance through an agreed consequence for breach.

Their precise effect depends on the contractual wording.

Again, they should not automatically be confused with the withdrawal mechanism in Article 1454.

Arras Penitenciales

Arras penitenciales are the form international buyers usually hear about.

Article 1454 of the Spanish Civil Code provides the familiar mechanism whereby, when qualifying arras apply, the buyer may withdraw by losing them and the seller may withdraw by returning them double.

However, this point is extremely important:

Article 1454 does not mean that every property deposit is automatically penitential arras.

Spanish jurisprudence treats penitential arras as exceptional and requires clear intention that the parties wanted to create that withdrawal right.

The Famous “Buyer Loses 10%, Seller Pays 20%” Rule Is Not Universal

This is one of the most repeated statements in Spanish property conversations.

It usually sounds like:

The buyer pays 10%. If the buyer cancels, they lose 10%. If the seller cancels, they pay back 20%.

That can describe a properly drafted penitential-arras arrangement.

But it is not a universal rule applying automatically whenever 10% changes hands.

The amount of deposit and the legal effect of that payment depend on the actual contract.

The Spanish Supreme Court doctrine cited in official BOE materials repeatedly stresses that penitential arras require clear and unmistakable intent and are interpreted restrictively.

Why the Contract Wording Matters More Than the Heading

Imagine two documents.

Both are titled:

CONTRATO DE ARRAS

In Document A, the clauses clearly grant both parties a contractual right to withdraw through the loss or doubled return of the deposit.

In Document B, the deposit is described mainly as a payment on account of the price, with other remedies for breach.

Those two agreements may not have identical consequences.

The heading does not decide everything.

The substance does.

Reservation Agreement vs Private Purchase Contract: Main Difference

Broadly, a reservation agreement tends to be an earlier and simpler commercial step.

A private purchase agreement tends to define the transaction much more fully.

But there is no magic legal rule saying:

reservation = harmless

and

private contract = binding.

A sufficiently precise earlier agreement can itself have important legal consequences.

Spanish contract law looks at what the parties actually agreed, not merely the filename at the top of the page.

How Much Is Usually Paid at Reservation?

There is no universal statutory amount.

In practice, reservations vary according to:

• price;

• agent;

• seller;

• transaction.

A relatively modest fixed sum may be used in some cases.

Other transactions can involve a percentage.

The key issue is not the number alone.

It is what happens to that amount under the document.

How Much Is Usually Paid at the Private Contract?

Many Spanish property transactions use a deposit that brings the buyer's total payments to around 10% at the private-contract stage.

But this is a market practice, not a universal legal requirement.

A transaction may use:

• a different percentage;

• staged payments;

• a higher amount;

• a lower amount.

Off-plan property can follow a completely different schedule.

Do not build your legal assumptions around the number 10%.

What Happens to the Reservation Amount Later?

In many transactions, a valid reservation payment is credited toward:

• the next deposit;

• ultimately the purchase price.

For example:

Reservation:

€10,000

Later private-contract payment required:

€100,000 total

Buyer may then pay:

€90,000

so that cumulative payments equal €100,000.

But the individual agreement must confirm this.

Due Diligence Between Reservation and Private Contract

This is often one of the most important stages.

The buyer's independent lawyer may investigate:

• registered ownership;

• mortgages and charges;

• community debts;

• local property tax;

• planning situation;

• licences;

• registered description;

• other legal issues.

The purpose is to understand what the buyer is actually purchasing before committing more heavily.

For international buyers, independent legal representation is highly advisable; EQUA's Buying Property in Marbella as a Non-EU Buyer similarly separates the agent's commercial role from the independent lawyer's legal role.

Reservation Should Give Due Diligence Enough Time

A very short reservation period can create pressure.

The buyer's lawyer needs a realistic opportunity to obtain and review documentation.

Before signing, ask:

How long does the reservation last?

What documentation must the seller provide?

What happens if legal checks are still incomplete when the reservation expires?

A good buying process should move efficiently without forcing the buyer to skip necessary checks.

What If Due Diligence Finds a Problem?

The answer should ideally already exist in the contract.

Potential issues can include:

• undisclosed charge;

• legal discrepancy;

• planning problem;

• community debt;

• missing documentation.

The buyer should understand which findings allow:

• refund;

• renegotiation;

• withdrawal;

• extension.

Do not wait until a problem appears to ask what the reservation clause means.

Mortgage Buyers Need Extra Protection

A buyer requiring mortgage financing faces another layer of risk.

A mortgage may fail because of:

• borrower underwriting;

• property valuation;

• property acceptability;

• timing.

A reservation or private contract is not automatically cancelled simply because financing does not materialise.

EQUA's Buying Property in Marbella With a Mortgage as a Non-Resident specifically warns that a reservation or arras agreement is not automatically refundable merely because the mortgage application fails.

If mortgage approval is essential, appropriate contractual protection should be negotiated with the seller and reviewed by the buyer's lawyer.

“Subject to Mortgage” Needs Clear Drafting

A vague mortgage clause can create uncertainty.

Questions include:

What minimum amount must the bank approve?

By what deadline?

What happens if valuation is low?

What evidence of rejection is required?

The more important the financing condition is, the more carefully it should be drafted.

Offer, Reservation and Private Contract Are Different Stages

Buyers sometimes use these three concepts interchangeably.

They should be separated.

Offer

A proposal containing commercial terms.

Reservation

Often used to secure a temporary exclusivity period and move the transaction forward.

Private Purchase Contract

Usually a more comprehensive contractual commitment setting out the sale terms.

But remember:

Spanish law can attach legal significance to agreement of essential terms before the document somebody casually calls the “final contract.”

That is why even offers should be drafted carefully.

Buyer Details Should Be Correct From the Beginning

The reservation should identify who the buyer actually intends to be.

Potential purchasers might include:

• one individual;

• spouses jointly;

• company;

• other ownership structure.

Changing the buyer later can create legal, financing or tax complications.

High-value buyers considering corporate structures should obtain specialist tax and legal advice before committing.

Property Description Must Be Clear

The contract should identify exactly what is being purchased.

This may include:

• main dwelling;

• parking space;

• storage unit.

Where furniture or other contents are important, those should also be clearly addressed.

Do not assume that a parking space shown during the viewing is automatically part of the sale.

Furniture Should Be Documented

Marbella properties are frequently sold furnished.

The contract should clarify whether furniture is:

• included;

• excluded;

• partly included.

For high-value furnished villas, an inventory can prevent disagreement.

Statements such as:

“sold as seen”

should not replace clarity where expensive items matter to the transaction.

Completion Date

The private contract usually establishes when the parties expect to complete before the notary.

This date matters.

The buyer may need time for:

• mortgage approval;

• international transfer;

• NIE;

• power of attorney.

The seller may need time to:

• vacate;

• discharge a mortgage;

• prepare documents.

Agreeing an unrealistic completion date can create unnecessary breach risk.

Completion Date vs Estimated Date

Read the wording carefully.

Does the contract establish:

• fixed deadline;

• flexible window;

• possibility of extension?

Do not assume the date is merely indicative.

What If the Buyer Does Not Complete?

The consequences depend on the contract.

Potential outcomes can vary according to whether the agreement contains:

• penitential arras;

• penal clauses;

• confirmatory deposit;

• other breach provisions.

This is exactly why buyers should not rely on generic internet advice.

Read the transaction-specific contract.

What If the Seller Does Not Complete?

Again, the answer depends on the contract and applicable law.

In certain arrangements, the buyer may have rights going beyond the return of money.

In a clearly agreed penitential-arras arrangement, the familiar Article 1454 mechanism may permit the seller to withdraw by returning double.

But where that mechanism was not clearly agreed, other contractual remedies may become relevant instead.

Your lawyer should explain the consequences before signature, not after a dispute begins.

Why Buyers Should Be Careful With the Word “Cancel”

A buyer may say casually:

“If something changes, I can just cancel.”

That is dangerous thinking.

Whether a buyer can withdraw — and at what cost — depends on:

• contract;

• conditions;

• reason for withdrawal;

• stage of transaction.

There is no general cooling-off period that international buyers should assume applies to an ordinary negotiated Spanish resale purchase.

Can a Reservation Be Binding Before Both Parties Sign?

This depends on the facts and wording.

Spanish law recognises that agreement can become significant where offer and acceptance converge on the relevant essential elements. Articles 1261, 1262 and 1450 are therefore important background principles.

Do not assume an unsigned seller copy automatically makes every earlier exchange irrelevant.

Your lawyer should review the actual communications where there is uncertainty.

WhatsApp and Email Should Not Be Treated Casually

Property negotiations increasingly take place through:

• WhatsApp;

• email;

• portals.

This is convenient.

But written communication can become evidence of what parties discussed or accepted.

A buyer should therefore avoid sending messages such as:

“Confirmed. We definitely buy at €2 million with no conditions.”

unless they genuinely intend to create that position and understand the consequences.

Commercial communication should be clear and disciplined.

Should You Sign a Reservation Before the Seller Has All Documents?

This is transaction-specific.

In some cases, a reservation may be precisely what gives the lawyer time to gather and review documents.

But the buyer should understand:

• what documentation remains outstanding;

• what due-diligence protection exists;

• whether the deposit is refundable if a material legal issue appears.

Do not let the desire to secure the property eliminate basic protections.

Reservation Contract Red Flags

Be cautious where the document:

• does not identify the property clearly;

• does not explain refund conditions;

• does not say who receives the money;

• has no realistic due-diligence period;

• contains unclear buyer obligations;

• assumes financing with no financing condition;

• provides no clear next contractual step.

A reservation can be short.

It should not be ambiguous on the points that matter.

Private Purchase Contract Red Flags

Be especially careful where:

• property description differs from what you viewed;

• parking or storage is unclear;

• deposit consequences are vague;

• completion deadline is unrealistic;

• mortgage dependency is ignored;

• furniture is disputed;

• seller obligations are unclear.

The more money being transferred, the less room there should be for ambiguity.

Arras Red Flags

Never assume:

“It says arras, so Article 1454 definitely applies.”

The legal nature depends on the terms and intent.

Official BOE materials summarising Spanish Supreme Court doctrine distinguish confirmatory, penal and penitential arras and emphasise that penitential arras are exceptional rather than presumed.

This is one of the most important legal distinctions an international buyer should understand.

Reservation vs Private Contract: Simple Comparison

Reservation Agreement

Typically:

• earlier stage;

• smaller payment;

• limited reservation period;

• initial conditions;

• gives time for due diligence.

Private Purchase Contract

Typically:

• more detailed;

• larger financial commitment;

• defines completion;

• establishes rights and obligations;

• may include arras or other default mechanisms.

These are market patterns, not rigid statutory definitions.

The actual wording prevails.

What Should You Ask Before Signing a Reservation?

Ask:

Who holds the reservation money?

When is it refundable?

When is it non-refundable?

Is the purchase subject to legal due diligence?

Is it subject to mortgage approval if required?

How long is the property reserved?

Is the agreed purchase price fixed?

What happens next?

What deadline applies?

What Should You Ask Before Signing the Private Contract?

Ask:

What type of deposit am I paying?

What happens if I do not complete?

What happens if the seller does not complete?

Is my reservation already credited toward the price?

What conditions remain outstanding?

What is the completion deadline?

What exactly is included in the sale?

Are all due-diligence issues resolved?

Do I have confirmed financing?

When Should Your Lawyer Become Involved?

Ideally, before you sign anything that materially commits you.

International buyers sometimes wait until after paying a reservation.

That is not ideal where legal advice could have clarified the refund conditions beforehand.

For a significant purchase, involve your independent lawyer early.

Estate Agent vs Lawyer

The estate agent's role can include:

• sourcing;

• viewings;

• negotiation;

• transaction coordination.

The independent lawyer's role includes legal review.

These responsibilities complement one another.

They should not be confused.

Notary vs Lawyer

The Spanish notary is a neutral public official.

The buyer's independent lawyer acts specifically in the buyer's interest.

Notarial completion does not make earlier legal due diligence unnecessary.

Remote Buyers

International buyers frequently sign documents while abroad.

This can be handled through:

• electronic signature in some transactional stages;

• authorised representation;

• power of attorney where appropriate.

Remote convenience should not reduce the level of review.

In fact, remote buyers often need greater documentary clarity because they cannot easily visit offices or inspect documents in person.

A Practical Example

Imagine a buyer agrees to purchase a Marbella apartment for:

€1,200,000

They sign a reservation and pay:

€10,000

The agreement allows a short period for legal due diligence.

The lawyer reviews the title and documentation.

Everything is satisfactory.

The parties then sign a private purchase contract requiring total payments to reach:

€120,000

The buyer therefore pays an additional:

€110,000

The remaining balance is paid at completion.

This is a perfectly understandable commercial sequence.

But the legal consequences of the €120,000 depend on what the private contract actually says.

Do not assume simply because the total equals 10% that the arrangement automatically has one particular legal classification.

Another Example: Mortgage Buyer

Purchase price:

€800,000

Reservation:

€10,000

Buyer requires financing.

If the reservation agreement contains no mortgage protection and the bank later declines the application, the buyer should not simply assume the €10,000 must automatically be returned.

This risk should be addressed before signature.

For financed purchases, the buyer should organise mortgage preparation early rather than after becoming heavily committed. EQUA's Mortgage Guide for International Buyers in Spain explains why financing preparation should precede serious property commitments.

Another Example: Seller Withdraws

Suppose the seller receives a higher offer after signing a private contract.

Can they simply return double and sell to somebody else?

Possibly — if the contract clearly created a penitential withdrawal right with that consequence.

But buyers should not assume this applies to every signed private agreement.

The precise contractual regime matters.

Reservation Contract vs Private Purchase Contract: Final Buyer Perspective

The most important lesson is not to memorise Spanish terminology.

It is to understand what you are signing.

A reservation agreement can be useful because it can secure time for legal checks.

A private purchase contract can give both parties certainty around:

• price;

• deposit;

• completion;

• obligations.

Arras can also provide an agreed contractual mechanism.

But none of these labels should be interpreted in isolation.

Before transferring money, understand:

What am I promising?

What is the seller promising?

When can I withdraw?

What happens to my money?

What happens if the seller withdraws?

What conditions protect me?

If those questions are clear, the contract is doing its job.

Buying Property in Marbella With EQUA Estates

EQUA Estates works with international buyers searching across Marbella, Benahavís, Estepona and the wider Costa del Sol.

During the commercial transaction, our role can include:

• offer coordination;

• communication with the selling party;

• reservation coordination;

• transaction follow-up;

• coordination with the buyer's independent lawyer;

• coordination with mortgage professionals where required.

Legal interpretation and contractual advice remain the responsibility of the buyer's independent Spanish lawyer.

That distinction protects everyone involved.

Because the objective is not simply to reserve a Marbella property.

It is to understand exactly what you are committing to before your money and legal obligations become significant.