If you are a US citizen looking at a Marbella villa, a Costa del Sol apartment, or any Spanish property — buying it is the legal and tax equivalent of straddling two jurisdictions at once. Spain has its own deed system, its own tax filings, its own bank account requirements. The US, simultaneously, considers your Spanish property a “specified foreign asset” with its own FBAR, FATCA, and Form 8938 reporting obligations that don’t go away just because you bought through a Spanish notary. This is the working 2026 guide we run through with US clients before any Spanish purchase, written from our Marbella office where we close several US-buyer transactions every month.
The two-attorney rule
The single most important upfront decision: you need both a US-side tax CPA familiar with cross-border issues AND a Spanish lawyer. Not one or the other. The split is straightforward:
| US side (your CPA) | Spanish side (your Spanish lawyer) |
|---|---|
| FATCA / FBAR / Form 8938 reporting | Property due diligence (title, debts, planning) |
| Foreign tax credit on Spanish-paid tax | NIE number application |
| State tax implications (CA, NY especially) | Bank account opening |
| Treaty position on rental / sale gain | Escritura notarial signing |
| Reporting Spanish entities (if used) | Spanish tax filings (IRNR / Modelo 210) |
| Estate planning interaction | Plusvalía and ITP coordination |
A US attorney cannot advise on Spanish law; a Spanish lawyer cannot advise on US tax. Hiring both is a few thousand dollars in fees that prevents six-figure problems. We coordinate with the US-side CPA on every US-buyer file we run.
Why US buyers come to Costa del Sol specifically
Three factors keep showing up in our intake calls:
- Lifestyle + climate, especially for retirees and remote-work executives. Marbella, Estepona, and Sotogrande have established US-leaning communities (international schools, English-speaking medical clinics, established expat networks).
- Currency hedge. Some US buyers explicitly want non-USD assets — Spanish real estate provides EUR-denominated exposure.
- Path to EU residency (separately, via Golden Visa or Non-Lucrative Visa). The Golden Visa property route was phased out in 2024, but property purchase still indirectly supports the Non-Lucrative Visa profile.
The Marbella market specifically has been the most price-resilient of the major Spanish markets through 2024–25, with average prime property values up ~6% year-on-year per the latest Tinsa figures. Inventory at the €1.5M+ level remains thin.
What buying triggers on the US side
Three filings to know — your US CPA handles them, but here’s the framework so you know what to expect:
1. FBAR (FinCEN Form 114)
Required if the aggregate balance of your foreign financial accounts exceeds $10,000 USD at any point during the year. The Spanish bank account you’ll open to fund the purchase counts. Even if it only briefly held the down payment before the wire to the seller, FBAR triggers.
- Threshold: $10K aggregate, any moment in the year
- Filed: electronically through the BSA E-Filing System, due April 15 (auto-extended to October 15)
- Penalty: civil penalties for non-willful violations up to $10K per account per year; willful penalties dramatically higher
- Critical: the property itself doesn’t trigger FBAR — only financial accounts. Your Spanish bank account does.
2. Form 8938 (FATCA)
Filed with your US 1040 by individuals holding “specified foreign financial assets” above thresholds:
| Filing status | Living abroad threshold | Living in US threshold |
|---|---|---|
| Single | $200K end-year / $300K any time | $50K / $75K |
| Married jointly | $400K / $600K | $100K / $150K |
Spanish property held personally doesn’t count. Spanish property held in a foreign entity (e.g. a Spanish SL) generally does. The Spanish bank account does. So personal-name property purchases avoid Form 8938 unless your bank account or other foreign assets independently cross thresholds.
3. Spain-US tax treaty (Convention of 1990, amended 2013)
The treaty governs which country gets first dibs on different income types:
- Spanish rental income from your Spanish property: Spain primary, US credits (foreign tax credit on Form 1116).
- Capital gains on eventual sale of Spanish property: Spain primary, US credits.
- US-source income (US dividends, US Social Security, IRA distributions): US primary while you’re US-resident; Spain primary if you become Spanish-resident.
In practice, the Spanish tax on a Spanish property is usually the higher of the two, so your US foreign tax credit absorbs the Spanish tax fully and your US net liability on Spanish income is often zero. But you still file both returns.
What buying triggers on the Spanish side
If you are a non-resident at closing (i.e. not a Spanish tax resident, just buying property), you face the standard non-resident purchase stack — see our Buying Property in Spain guide for the general framework. The US-citizen-specific items:
- NIE number required at the notary. Use power of attorney via your Spanish lawyer to avoid the trip — see our NIE landing page or full NIE guide. Allow 2–3 weeks.
- Spanish bank account required to wire the purchase price and pay the property taxes. Most major Spanish banks open non-resident accounts for US citizens, but many require an in-person visit to Marbella or your nearest Spanish branch (or a notarised PoA — coordinated by us).
- Annual non-resident property tax (IRNR / Modelo 210) — even if you don’t rent the property out, Spain levies an “imputed income” tax on non-resident property owners, calculated as 1.1–2% of the cadastral value, taxed at 19% (you’re EU/EEA-treated for this rate purposes? No — US is non-EU, so the rate is 24%). Filed annually.
- Plusvalía municipal at sale — see our capital gains tax guide.
- 3% retention at sale — when you eventually sell, the buyer must withhold 3% of the sale price and remit to Hacienda, credited against your final CGT bill. Plan for this in your eventual exit liquidity model.
If you become Spanish tax-resident
Spending more than 183 days per calendar year in Spain makes you a Spanish tax resident — at which point your worldwide income becomes Spanish-taxable and the cross-border picture changes substantially:
- Modelo 720 kicks in. You must report all foreign assets (US IRAs, brokerage accounts, US property, foreign LLCs) above €50K thresholds annually. See our Modelo 720 guide.
- Wealth tax may apply on your worldwide net wealth above the regional threshold (Andalucía has a 100% bonus, so effectively zero in Andalusia for residents).
- Beckham Law — if you moved for an employment offer, the Beckham Law special regime gives 6 years of 24% flat tax on Spanish income and exemption from non-Spanish income tax. Critical: you must apply within 6 months of starting Spanish work and not have been Spanish tax-resident in the prior 5 years.
- Estate planning — Spain’s legítima (forced heirship) overrides US testamentary freedom unless you elect home-country law via professio iuris. See our cross-border Spanish will guide.
Five mistakes US buyers make most often
- Treating the Spanish purchase as US-only paperwork. Skipping FBAR / Form 8938 because “the property is in Spain” is the most common — and most expensive — error. Penalties are non-trivial.
- Buying via a US LLC for “asset protection.” Adds Spanish corporate filings, withholding, and complexity without meaningful protection benefit for personal residences. We’ve spent more time unwinding badly-structured LLC purchases than setting them up.
- Forgetting the annual IRNR / Modelo 210. Even with no rental income, non-resident property owners owe annual tax on imputed income. Missing it triggers Spanish penalty interest and complicates eventual sale.
- Not coordinating timelines. US wire transfers can take 2–5 business days, the Spanish notary needs cleared funds before signing the escritura, and the seller’s reservation timer doesn’t pause. Build at least 7–10 business days of float into the closing schedule.
- Assuming the Spanish lawyer covers US tax. They don’t, can’t, and shouldn’t. Bring your US CPA into the conversation from day one.
What we coordinate from Marbella
For US buyers, we typically run a single engagement that covers:
- Pre-purchase due diligence on the property (title, debts, planning, community fees, energy certificate)
- NIE for both spouses via power of attorney signed at any US notary
- Spanish bank account opening with a Marbella branch (CaixaBank, Sabadell, Bankinter) — coordinated to fund before notary
- Notary signing in Marbella (you can attend in person or grant PoA)
- Post-purchase registration at the Land Registry and tax office (IBI, plusvalía, IRNR setup)
- Year-1 IRNR Modelo 210 filing the following year, then handed off to your ongoing tax representative
We coordinate directly with your US-side CPA throughout so the cross-border calendar lines up. Most US-buyer engagements close 6–10 weeks from reservation to keys.
If you’re 1–6 months out from a Costa del Sol purchase, book a free consultation. The 30 minutes typically saves a multiple of itself in caught-early issues — most US buyer mistakes we see could have been prevented at the planning stage.
