- Spanish law requires advance payments on a home under construction to be protected, from the building licence onwards, by either a bank guarantee or surety insurance. The protection is designed for the money paid before the home is delivered.
- The guarantee covers the full advance, applicable taxes and statutory interest. Spain’s statutory interest rate is 3.25% in 2026.
- Advance payments must pass through a special bank account separated from the developer’s other funds and used only for costs connected with building the homes.
- The purchase contract must identify the guarantor and the bank account receiving the advance payments. At contract signing, the buyer should receive documentary evidence of the guarantee individualised to the sums that will be paid.
- If the home is not started or delivered within the agreed timetable, the buyer can formally demand repayment. If the promoter does not refund within 30 days, the buyer can pursue the guarantor; under surety insurance, the insurer then has 30 days from the claim to indemnify.
- Bottom line: an off-plan payment should not be treated as an unsecured leap of faith. The useful buyer question is not merely “is there a bank guarantee?” but whether your own payments, taxes, property and timetable are actually identified by the protection.
The most important document in an off-plan purchase is rarely the one that sells the apartment. Renderings, floor plans and terrace dimensions explain what a Costa del Sol home may become. The bank guarantee or surety policy explains what happens to the buyer’s money before it gets there.
That distinction matters in a market where buyers routinely reserve homes months or years before completion and make staged payments while construction progresses. Spain has a specific statutory framework for those advances. From the point at which the building licence has been obtained, the promoter must protect advance payments through an authorised insurer or credit institution; the money must also be channelled through a special account separated from the promoter’s other funds.
This is not an exotic safety net for troubled projects. It is part of the ordinary legal plumbing of buying a home under construction in Spain. For an international buyer, understanding it is useful precisely because the best protection is boring: the right account, the right document, the right amount and a paper trail that matches the contract.
The Guarantee Starts With the Building Licence
The legal starting point is unusually precise. The first additional provision of Spain’s Ley de Ordenación de la Edificación says the obligation to guarantee repayment arises from the granting of the building licence. From then on, sums advanced for construction must be backed either by surety insurance with an insurer authorised in Spain or by a joint-and-several bank guarantee from an authorised credit institution.
The scope is broader than the headline deposit. The guarantee must extend to the full amount advanced by the buyer, applicable taxes and statutory interest. Banco de España’s current consumer guidance summarises the same rule and confirms that the interest runs from the date each advance is actually paid until the scheduled delivery date. The statutory interest rate for 2026 is 3.25% a year.
For most ordinary new residential purchases, the tax point is material because a first delivery by a developer is generally subject to 10% IVA. The Agencia Tributaria confirms that rate for new homes, including up to two garage spaces and an annex transferred with the home in the qualifying circumstances. If a buyer pays €100,000 of the purchase price in advance and €10,000 of IVA alongside it, the protection is not supposed to stop at €100,000.
The building-licence trigger is also why timing matters. An early reservation made before the licence has been granted is not something a buyer should automatically assume sits inside exactly the same statutory guarantee regime. The sensible approach is simple: before any material pre-completion transfer, an independent Spanish lawyer should verify the licence status, the contractual basis for the payment and the protection actually in place.
There Are Two Layers of Protection, Not One
Buyers tend to focus on the word aval — the guarantee — but the law actually creates two linked controls. The first is where the money goes. Advance payments must be received through a credit institution and deposited into a special account, separated from the promoter’s other funds. The promoter may use those funds only for costs arising from construction of the homes.
The second layer is the repayment guarantee itself. That can be a bank guarantee or a surety-insurance policy. The bank holding the special account is not meant to behave as a passive cashier: the law says that when opening the account or deposit, the credit institution must require the guarantee under its own responsibility.
For a buyer, this is commercially useful because it turns a vague promise into a set of documents that can be checked. The private purchase contract should name the insurer or bank providing the guarantee and identify the credit institution and account into which the buyer must make the agreed advances. The bank details on an invoice or payment request should not feel disconnected from the contract.
That does not mean a buyer has to audit a developer’s accounts. It means the buyer’s lawyer can confirm that the statutory structure exists before substantial money leaves the buyer’s account. In a market where the physical home may still be concrete and scaffolding, paperwork is one of the few parts of the product that can already be complete.
What the Individual Guarantee Should Actually Cover
The strongest part of the Spanish framework is that the protection is not supposed to exist only at development level. For surety insurance, the law requires an individual policy for each buyer identifying the property for which the advance payments are being made. At the signing of the purchase contract, the promoter must deliver documentary evidence of the guarantee, individualised to the advance payments due under that purchase.
That gives a buyer four useful points to match: the purchaser, the specific home, the amounts or payment schedule and the guarantor. A generic sentence in a brochure saying “payments are bank guaranteed” is reassuring marketing; an individualised guarantee that corresponds to the private purchase contract is the meaningful legal document.
The amount should also move with the payment schedule. The law requires the bank guarantee to be issued and kept in force for the total advances under the contract, including applicable taxes, increased by statutory interest from the effective date of each advance until the expected delivery date. Under surety insurance, the insured sum follows the same basic logic.
Banco de España published a useful reminder in August 2026 that there is no central Banco de España register from which a buyer can simply download a lost bank guarantee. Credit institutions maintain their own records. That is a good practical reason to keep the guarantee, payment receipts and purchase contract together rather than treating the document as disposable administration.
A €600,000 Example: What Is Actually Protected Before Completion?
Payment schedules vary by development, so there is no honest single percentage that represents every Costa del Sol off-plan purchase. But a simple €600,000 illustration shows why the distinction between “deposit” and “protected advance payments” matters. The table below assumes an ordinary new-home IVA rate of 10% and shows three hypothetical amounts paid towards the price before completion.
| Illustrative pre-completion payment | Price advance | 10% IVA on advance | Cash advanced incl. IVA | 3.25% for one year* |
|---|---|---|---|---|
| 10% of €600,000 | €60,000 | €6,000 | €66,000 | €2,145 |
| 20% of €600,000 | €120,000 | €12,000 | €132,000 | €4,290 |
| 30% of €600,000 | €180,000 | €18,000 | €198,000 | €6,435 |
FAQ
Questions fréquentes
Are off-plan deposits protected by law in Spain?
Yes. From the granting of the building licence, Spanish law requires advance payments for homes under construction to be protected by authorised surety insurance or a bank guarantee. The protection extends to the advances, applicable taxes and statutory interest.
Does a bank guarantee cover the IVA paid with my stage payments?
The statutory guarantee covers advance payments including applicable taxes, plus legal interest. For an ordinary first delivery of a new home, the current general IVA rate is 10%, although the tax treatment of a specific transaction should be confirmed by the buyer’s adviser.
When should I receive evidence of the off-plan guarantee?
At the signing of the purchase contract, the promoter must provide the buyer with documentary evidence of the guarantee, individualised to the advance payments that will be made. The contract should also identify the insurer or bank guarantor and the account receiving the advances.
What happens if a Costa del Sol new build is not delivered by the agreed deadline?
Depending on the contractual and legal position, the buyer may choose to terminate and seek return of the protected advances, taxes and legal interest, or agree a formal extension with a new delivery date. To call on the guarantee, the buyer normally first makes a provable repayment demand to the promoter and can proceed against the guarantor if repayment is not made within 30 days.
What is Spain’s statutory interest rate in 2026?
Banco de España lists the statutory interest rate at 3.25% a year for 2026. For protected off-plan advances, the law applies legal interest from the effective date of each advance to the scheduled delivery date.
Should I rely on the developer or agent to check the guarantee?
No. The promoter has the statutory obligations, but the buyer should have an independent Spanish lawyer verify the building licence, purchase contract, special account and individual guarantee before material stage payments. This article is general information and not a substitute for advice on a specific purchase.
