The 10 Most Expensive Mistakes Americans Make Buying in Spain

Process

Aug 24

By Daria Kulachek

Two Americans buy the same €400,000 apartment in Alicante, the same month, on the same terms. One of them ends up roughly €21,000 poorer than the other. Nothing about the property was different. Everything about the paperwork was.

That's the shape of this problem. Spanish property doesn't punish you with one catastrophic error — it charges you four or five modest ones, spread across two years, each arriving separately enough that you never add them up.

So let's add them up. Every figure below is a 2026 number, sourced at the end, and priced in euros against one reference deal: a €400,000 resale apartment in the Valencian Community, bought by a US citizen who is not tax-resident in Spain, held five years, sold for €450,000.

Mistake 1: Signing the arras contract before your lawyer has read the nota simple

The contrato de arras penitenciales is the standard Spanish deposit contract, governed by Article 1454 of the Civil Code. It is not a US purchase agreement with an inspection period. It is a priced right of withdrawal: if you walk away, you forfeit the entire deposit; if the seller walks away, they must return double.

The deposit is customarily 10% of the price. On our €400,000 apartment, that's €40,000 that stops being refundable the moment you sign.

There is no escrow company holding it. There is no standard financing contingency baked in. And the document that tells you whether the seller actually owns the property, whether there's a mortgage on it, whether the registered square meters match the apartment you walked through — the nota simple from the Registro de la Propiedad — costs €9.02 plus IVA and takes a day.

Sign first, read second, and the €9 document becomes a €40,000 one.

Mistake 2: Leaving the NIE until after the arras

You cannot sign the escritura without an NIE (Número de Identificación de Extranjero). It has to appear on the deed, on the tax filings, and on the registry entry. No NIE, no completion.

Applying through a lawyer holding an apostilled power of attorney typically runs 4–8 weeks from the day they receive the signed POA — longer if consulate or immigration office appointments are backed up. Spanish purchases usually run 30–60 days from arras to escritura.

Do that arithmetic in the wrong order and you're asking a seller for an extension you have no contractual right to. If they say no, refer back to Mistake 1.

Start the NIE before you make an offer, not after it's accepted.

Mistake 3: Assuming the tax is calculated on the price you paid

It isn't. Since Law 11/2021, transfer tax (ITP) is assessed on the higher of the declared price or the property's valor de referencia — a value set annually for every property by the Dirección General del Catastro.

You can look it up before you offer. Most American buyers don't know it exists until a liquidación complementaria lands months after completion.

On our deal: purchase price €400,000, reference value €440,000, ITP at the Valencian general rate of 9%. You budgeted €36,000. The bill is €39,600 — a €3,600 surprise, plus late-payment surcharges under Article 27 of the Ley General Tributaria at 1% per full month of delay (rising to 15% plus interest past twelve months).

Mistake 4: Not knowing your region's rate — or its cliff edge

ITP is regional, and in 2026 it ranges from 6% to 13% depending on the autonomous community. Madrid's general rate is 6%. Andalusia is 7%. Cantabria and Castile-La Mancha are 9%. Catalonia runs a scale to 13%, plus a flat 20% for buyers classed as large property holders.

The Valencian Community cut its general rate from 10% to 9% in June 2026 — determined by the date the deed is signed, not the date you agreed the price.

And there is a cliff. In the Valencian Community, property valued above €1,000,000 is taxed at 11% on the entire base, not on the excess. Watch what that does:

A €999,000 purchase at 9% pays €89,910 in ITP
A €1,010,000 purchase at 11% pays €111,100 in ITP

€11,000 more house costs €21,190 more tax. That's the single largest avoidable number in this article, and it's avoided by one phone call before you make the offer.

New build is a different tax entirely: 10% IVA (7% IGIC in the Canaries) plus regional stamp duty, AJD, running roughly 0.5%–1.5%. Madrid's AJD is 0.75%. All-in closing costs land at 9%–15% of the price for most foreign buyers — budget the top of that band, not the bottom.

Before you make an offer, you should know three numbers: your region's ITP rate, the property's valor de referencia, and your all-in closing cost total. We'll pull all three with you on a free call — book a consultation and you leave with the figures whether or not you work with us.

Mistake 5: Wiring the money through your regular bank

This is the mistake that costs the most for the least reason.

High-street banks typically build a 2%–4% margin into the exchange rate on a retail transfer — not a fee you see on a statement, a spread inside the rate. Specialist currency brokers routinely price 1–2 points closer to the interbank rate.

On a €400,000 purchase, a 1.5-point difference is €6,000. Same money, same day, same destination account. You just picked the wrong pipe.

Brokers also offer forward contracts, which let you fix a rate for up to twelve months. If you're buying off-plan with staged payments across a two-year build, that isn't a nicety — it's the difference between a budget and a bet.

Mistake 6: Not demanding the debt certificates at signing

In Spain, certain debts follow the property, not the person who ran them up.

Under Article 9.1.e of the Ley de Propiedad Horizontal, unpaid community fees from the current year plus the three preceding calendar years attach to the apartment. Buy it, own them. At €120 a month, that's up to €5,760 you inherit at the notary's table.

IBI — the municipal property tax — carries its own mechanism, afección real, letting the town hall enforce arrears against the property itself.

The fix is administrative and free: your lawyer requires a certificado de deudas from the community administrator and proof of IBI payment before the escritura is signed. Notaries normally ask for the community certificate. Normally is not always, and it is not their job to chase it.

Mistake 7: Assuming an empty apartment generates no tax

It doesn't generate rent. It generates imputed income.

Spain taxes non-resident owners on notional rental income from any urban property they don't rent out. The base is 2% of the cadastral value, or 1.1% if that value has been revised under a collective valuation in the current or previous ten tax periods. You declare it on Modelo 210, filed by 31 December of the following year.

Here's the part that catches Americans specifically. The Agencia Tributaria's own rate table sets 19% for residents of the EU, Iceland and Norway — and 24% for "other taxpayers." US citizens are other taxpayers.

Our apartment, cadastral value €160,000, not recently revised:

2% × €160,000 = €3,200 × 24% = €768 per year.

Five years unfiled is €3,840, plus Article 27 surcharges when you regularize. Nobody sends you a bill. The obligation exists anyway.

Mistake 8: Budgeting rental tax at the EU rate

If you do rent it out, the same 19%/24% split applies — and it comes with a second, sharper edge.

EU, Icelandic and Norwegian residents pay 19% on net rental income, after deducting mortgage interest, IBI, community fees, insurance, repairs and depreciation. US citizens pay 24% on gross receipts, with no deductions.

On €20,000 of annual rent with €7,000 of running costs:

EU owner: 19% of €13,000 = €2,470
US owner: 24% of €20,000 = €4,800

Nearly double, on identical property. Run your yield model on the 24%-of-gross figure or the model is fiction. If financing is part of that model, the Spanish mortgage rules for Americans matter too — non-resident LTV generally caps at 60%–70%, and banks lend against the lower of price or valuation.

Mistake 9: Throwing away the purchase paperwork

Spanish capital gains tax for non-residents is 19% on the gain — sale price less acquisition cost. And acquisition cost is not just what you paid. It includes the taxes and expenses inherent to the purchase: ITP or IVA/AJD, notary, land registry, legal fees. Documented capital improvements count too. Routine maintenance and cosmetic work do not.

On our deal, that's real money sitting in a folder:

ITP at 9% — €36,000
Notary — €700
Land registry — €600
Legal fees — €4,000
Total addable to basis — €41,300

Lose those receipts and you hand the Agencia Tributaria a gain €41,300 larger than the real one. At 19%, that's €7,847.

Keep the escritura, every tax receipt, every professional invoice, and every builder's factura with your NIE on it. Scan them the week you buy.

Mistake 10: Not planning the exit before you need it

Three things happen when a non-resident sells, and Americans are routinely surprised by all three.

The 3% retention. The buyer must withhold 3% of the agreed price and pay it to the Agencia Tributaria on Modelo 211 within one month of completion. It's an advance against your capital gains tax, not an extra tax. On a €450,000 sale that's €13,500 you don't receive at closing.

You reclaim the excess by filing Modelo 210 within four months. Miss the window and the retention is effectively forfeit. Refunds that are filed on time still commonly take six to twelve months to arrive — plan cash flow accordingly.

This cuts the other way too: if you buy from a non-resident seller and fail to withhold, the tax debt can attach to the property you just bought. Confirm your seller's residency status. It's a question, not an investigation.

Plusvalía municipal. The municipal land-value tax, normally paid by the seller. After the Constitutional Court struck down the old formula in 2021, Real Decreto-ley 26/2021 established two methods — an objective method (cadastral land value × a statutory coefficient for years held) and a real method (actual gain apportioned to the land share). You may apply whichever is lower, and if there was no real gain, no tax is due — but you must prove it with both deeds. Sellers who don't ask, don't get.

The US side. Be precise here, because bad advice circulates in both directions. A directly held Spanish property is not reportable on FBAR and not a specified foreign financial asset on Form 8938 — the IRS says so explicitly. But the Spanish bank account you opened to pay the IBI is reportable, on FBAR, once your foreign accounts exceed $10,000 in aggregate at any point in the year. Form 8938 thresholds start at $50,000 for a single filer living in the US and $200,000 for one living abroad. And rental income is taxable in the US regardless — with foreign tax credits available for what Spain took.

What this actually adds up to

No one makes all ten. Make four, and here's the bill on our €400,000 apartment:

FX through a retail bank instead of a broker (1.5 points on €400,000) — €6,000
ITP assessed on a valor de referencia €40,000 above the price, at 9% — €3,600
Five years of unfiled Modelo 210 imputed income (2% × €160,000 × 24%) — €3,840
€41,300 of acquisition costs undocumented, taxed as gain at 19% — €7,847
Total — €21,287

Swap any one of those for another item on the list — inherited community arrears at €5,760, say — and the total moves a little but stays in the same band. Call it €20,000 to €25,000 on a €400,000 purchase. Roughly 5% of the price, for errors that are entirely procedural.

Not one of them required bad luck. Not one required a dishonest seller. They're all just things nobody told you, in a system that assumes you already know.

The counter is boring and it works: get the NIE started early, hire an independent abogado before you sign anything, look up the valor de referencia, use a currency broker, demand the debt certificates, and file the 210 every year. That's the whole defense.

What to do next

If you're already in a transaction, the highest-value hour you'll spend is the one where someone walks the specific numbers of your deal — your region's rate, your reference value, your closing-cost total, your FX exposure.

Book a free consultation. We're in LA, so you book on California hours — no 6am calls to Spain. You leave with a written cost breakdown and a list of what to check before your next signature, yours to keep either way.

Earlier in the process? Start with the California-to-Spain playbook, read who's actually on your side in a Spanish purchase, look at what's available around Alicante, or download the free Spain property guide.

Quick answers

What is the most expensive mistake Americans make when buying property in Spain? Signing the arras deposit contract before due diligence. Under Article 1454 of the Spanish Civil Code, a buyer who withdraws forfeits the entire deposit — customarily 10% of the price, or €40,000 on a €400,000 apartment. The nota simple that would have flagged the problem costs €9.02 and takes a day.

Do Americans pay a different tax rate than Europeans on Spanish property income? Yes. The Agencia Tributaria charges residents of the EU, Iceland and Norway 19% on net rental income after expenses. US citizens fall under "other taxpayers" and pay 24% on gross rent with no deductions allowed. The same 24% applies to imputed income on a property you leave empty.

Do I have to report my Spanish property to the IRS? A directly held Spanish property is not reportable on the FBAR and is not a specified foreign financial asset on Form 8938. Your Spanish bank account is — FBAR applies once foreign accounts exceed $10,000 in aggregate at any point in the year. Inside Job Concierge flags this before you open the account.

Sources

Daria Kulachek