The 3% retention when selling property in Spain: what every non-resident must know

You have agreed a price, signed the arras contract, and booked the notary. Then, at the signing table, you discover that 3% of the total agreed price will not reach your bank account. It goes directly to the Spanish Tax Agency (Agencia Tributaria, AEAT) the same day you hand over the keys. 

For many non-resident sellers, this is a genuine surprise. It is, in fact, one of the most misunderstood aspects of selling property in Spain. This article explains the legal basis of the retention, who withholds it, which forms are involved, what the deadlines are, and what happens once you have signed. At Ábaco Advisers, we assist non-resident owners through every stage of this process, from the day of signing to recovering any refund you may be entitled to.

What is the 3% retention and why does it exist?

The 3% retention is a prepayment mechanism, not a final tax. It is withheld at the moment of signing to guarantee that the non-resident seller will settle any capital gains tax (CGT) due on the transaction.

Its legal foundation is Article 25.2 of the Texto Refundido de la Ley del Impuesto sobre la Renta de No Residentes (TRLIRNR), approved by Real Decreto Legislativo 5/2004, of 5 March (BOE, 12 March 2004). 

The rationale behind the retention is straightforward: once a sale completes and the funds leave Spain, AEAT has limited means to pursue a non-resident seller for unpaid taxes. Rather than rely on post-sale enforcement, the law places the obligation to withhold directly on the buyer, who acts as a guarantor of the potential tax liability.

Two key points often cause confusion:

• The 3% is calculated on the total declared sale price in the deed (escritura), not on the gain or profit made.
• The retained amount is not the final tax. It is an estimate. It may be more than sufficient to cover the actual CGT — in which case the seller can claim a refund — or it may fall short, in which case the seller must pay the difference.

Who actually withholds the 3%? the buyer’s obligation explained

Under Article 25.2 TRLIRNR, the buyer — not the notary, not the seller’s solicitor, not AEAT — is legally obligated to withhold 3% of the agreed sale price and pay it directly to the Spanish Tax Agency. This is the aspect of the retention that surprises both parties most.

The mechanics at the notary table are as follows:

• The seller receives only 97% of the agreed price on the day of signing.
• The buyer pays the remaining 3% directly to AEAT, using the seller’s NIE (Número de Identificación de Extranjero).
• The sale proceeds as normal; no additional cost falls on the buyer.

Practical example: a property is sold for €250,000. The buyer withholds €7,500 (3%) and pays it to AEAT. The seller receives €242,500 at signing.

It is important to note that the retention applies unconditionally, even if the seller is selling at a loss or breaking even. The mechanism cannot be waived at the notary. If no gain has been made, the seller’s remedy is to claim a full refund through Modelo 210 after the sale.

For buyers purchasing from a non-resident seller: failure to withhold and pay the 3% exposes the buyer to personal liability for the seller’s unpaid tax, under the joint and several liability provisions of the Ley General Tributaria. This is one of the principal reasons why professional legal representation is essential when purchasing from a non-resident.

Form 211: the buyer’s tax filing after the sale

Once the 3% is withheld at the notary, the buyer must formally remit it to AEAT using Modelo 211. 

Key points for the buyer:

• Deadline: Modelo 211 must be filed and the amount paid to AEAT within one month of the date of the deed of sale.
• How to submit: the form is available through the Agencia Tributaria’s website and can be submitted electronically or at an authorised bank.
• What it contains: the seller’s NIE, the declared sale price, and the withheld amount.
• After filing: the buyer must provide the seller with a copy of the payment receipt (comprobante). Without it, the seller cannot complete their own tax filing or initiate a refund claim.

Missing the one-month deadline exposes the buyer to surcharges and interest under the Ley General Tributaria. Post-completion compliance should be built into the buyer’s legal checklist from the outset.

Form 210: the seller’s capital gains declaration

With the Modelo 211 receipt in hand, the non-resident seller must file their own capital gains tax return using Modelo 210, the standard declaration form for the IRNR.

According to Article 5 of Orden EHA/3316/2010, the deadline for property sales is as follows: the seller has three months counted from the end of the one-month period the buyer had to file Modelo 211. In practice, this means the seller has a total of four months from the date of the sale to file Modelo 210.

Example: property sold on 10 April 2026 → buyer’s deadline for Modelo 211: 10 May 2026 → seller’s deadline for Modelo 210: 10 August 2026.

The purpose of Modelo 210 is to declare the actual capital gain (or loss) and reconcile it against the 3% already withheld by the buyer.

How the taxable gain is calculated:

Important: only documented and officially invoiced improvement costs can be deducted. Payments made in cash without a VAT receipt are not accepted by AEAT.

AEAT does not proactively remind non-residents of this obligation. Filing is entirely the seller’s responsibility, and missing the deadline can result in the loss of any refund entitlement and the application of surcharges under Article 27 of the Ley General Tributaria.

What is the applicable tax rate?

The tax rate applied to the capital gain depends on the seller’s country of fiscal residence. Under Article 25 TRLIRNR, as currently in force:

What happens when the 3% is too much, or not enough?

When the retention exceeds the tax owed: claiming a refund

This is the most common outcome, particularly for sellers who purchased many years ago, who have held the property at a modest value, or who have invested in documented improvements that reduce the taxable gain.

Example:

• Sale price: €200,000 → 3% withheld: €6,000
• Actual CGT calculated: €3,800
• Refund entitlement: €2,200

To recover the overpaid amount, the seller must file Modelo 210 within four months and include bank account details for the refund. AEAT will process the claim and, if approved, transfer the refund to the account provided. Processing times vary and can take several months; early filing is advisable.

The refund is never automatic. Sellers who assume AEAT will return the excess without a filing will not receive anything.

When the retention falls short: paying the balance

If the actual CGT calculated on Modelo 210 exceeds the 3% already withheld, the seller must pay the difference within the four-month window.

Example:

• Sale price: €350,000 → 3% withheld: €10,500
• Actual CGT calculated: €14,000
• Balance owed to AEAT: €3,500

Failure to pay within the deadline results in late-payment interest at the legal rate established annually by the Spanish Budget Law (3.25% for 2025), plus surcharges if the tax office issues a formal notice before the voluntary payment is made.

For sellers with outstanding annual IRNR declarations (the annual imputed income tax on properties not rented out), it is worth regularising any arrears before the sale proceeds. Unresolved obligations can complicate the refund process and may attract scrutiny from AEAT. Our guide to non-resident tax in Spain covers these annual obligations in full.

Do residents pay the 3% retention?

No. Sellers who hold a valid certificado de residencia fiscal (fiscal residency certificate) issued by AEAT at the time of the sale are exempt from the retention. Their capital gain is declared instead on the annual IRPF return, subject to the progressive savings income rates applicable to residents.

However, legal residency and fiscal residency are not the same thing. This distinction catches many sellers off guard:

• Holding a Spanish residency card (TIE) does not automatically make you a fiscal resident.
• Spending holidays in Spain or owning property there does not establish fiscal residency.
• Under Article 9 of the Ley del IRPF (Ley 35/2006), fiscal residency requires spending more than 183 days per year in Spain and/or having Spain as the main base of your economic interests.

If your residency status is uncertain, it should be clarified with a qualified adviser before the sale is agreed. The determination directly affects which tax regime applies and whether the 3% will be withheld.

Key deadlines at a glance

In conclusion

The 3% retention is a legal mechanism established under Article 25.2 TRLIRNR, designed to ensure that non-resident sellers declare and pay any capital gains tax owed on the sale of Spanish property. The buyer withholds it, pays it to AEAT within one month via Modelo 211, and the seller must file Modelo 210 within four months to either claim a refund or settle any outstanding balance.

Understanding the retention in advance — including the deadlines, the rate applicable to your situation, and the documentation required — makes the process significantly more straightforward. If you are considering selling your Spanish property and want to understand your tax position before agreeing a price, our article on calculating capital gains tax in Spain is a useful starting point.

At Ábaco Advisers, we work independently of estate agents. Our focus is solely on ensuring that your tax obligations are handled correctly, that every eligible cost is deducted from your gain, and that any refund you are entitled to is recovered. We offer a free, no-obligation initial consultation.

Frequently asked questions

Does the 3% apply even if I sell at a loss or break even? 

Yes. Under Article 25.2 TRLIRNR, the buyer must withhold 3% of the sale price regardless of whether a profit has been made. If no gain results — or if the actual tax owed is less than the amount withheld — the seller is entitled to a full or partial refund, which must be claimed by filing Modelo 210 within four months of the sale.

What happens if the buyer does not file Modelo 211? 

If the buyer fails to remit the 3% to AEAT within one month, they may be held jointly and severally liable for the seller’s tax under the Ley General Tributaria. From the seller’s perspective, without the Modelo 211 receipt it becomes considerably more complex to file Modelo 210 and initiate a refund claim. Legal representation for the buyer is strongly advisable in any purchase from a non-resident seller.

How long does a refund from AEAT take? 

AEAT processes refund claims from Modelo 210 filings at varying speeds. Processing can take several months. Filing as early as possible within the four-month window, with complete documentation, gives the process the best chance of resolving promptly.

I am a UK national — does the same 3% rule apply to me? 

Yes. The 3% retention applies to all non-resident sellers regardless of nationality. For UK nationals specifically, however, the applicable CGT rate on the gain may differ from the EU rate (19%) following Brexit. The applicable rate and any treaty relief available under the Spain–UK double taxation agreement should be confirmed with a tax adviser before completion.

Do I need a fiscal representative in Spain to file Modelo 210? 

For non-EU/EEA residents, appointing a fiscal representative (representante fiscal) in Spain is mandatory under Article 10 TRLIRNR. For EU/EEA residents, it is optional but strongly recommended — AEAT communications are issued in Spanish, deadlines are strict, and errors in the calculation can result in penalties or a delayed refund.