8 Mistakes Americans Make When Moving to Spain, and the Fix for Each
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In this article
- When do you become a Spanish tax resident without noticing?
- The eight mistakes, the rule and the fix
- Modelo 720: reporting what you own outside Spain
- Your U.S. filings keep running
- Working remotely on a non-lucrative visa
- Driving on your U.S. license past month six
- Two deadlines that belong to your first month
- Before your first Spanish tax year closes
- FAQ
Mistakes Americans make moving to Spain rarely come from a missing form. They come from rules that apply on a date, automatically: a tax residency test, an asset declaration, a U.S. filing that follows you, a license that stops working, a registration that lapses. Each mistake below comes with the rule as the competent authority states it and the fix, roughly in the order the risks appear after a move. This article is for informational purposes only and is not immigration, tax or medical advice; verify current requirements with the relevant Spanish authority or a licensed professional.
When do you become a Spanish tax resident without noticing?
Spain treats you as a tax resident for a calendar year if you spend more than 183 days in Spain during it, according to the Agencia Tributaria, and sporadic absences still count toward those days unless you prove tax residence in another country.
Days are not the only test. You are also resident if the main base of your activities or economic interests is in Spain, and the law presumes residence, unless you prove otherwise, when your spouse (not legally separated) and your dependent minor children live in Spain.
The mistake is treating residency as something you apply for. It is a status the rules assign: arrive in spring and stay, and you pass 183 days before the year is out. From that year on you are an IRPF taxpayer in Spain, which is also what brings Modelo 720 into play. How the U.S. and Spain split taxing rights on your pension, Social Security or investment income is set by the U.S.-Spain income tax treaty, and that analysis is worth a cross-border tax professional’s time.
The eight mistakes, the rule and the fix
Each of the 8 mistakes below has a trigger you can check in advance, set by a named authority.
| Mistake | Trigger | Set by | Fix |
|---|---|---|---|
| Not counting your days | More than 183 days in Spain in a calendar year | Agencia Tributaria | Log your entry date and every trip out |
| Skipping Modelo 720 | More than 50,000 euros in one block of assets outside Spain | Agencia Tributaria | List every account outside Spain each January |
| Dropping the FBAR | More than $10,000 across accounts outside the U.S., at any time | FinCEN | Add your Spanish accounts to the list |
| Missing Form 8938 | More than $200,000 at year end or $300,000 at any time, single filer living abroad | IRS | Check the total every December |
| Working remotely on a non-lucrative visa | Any work, including remote work online | Spanish consulates | Apply for the telework visa instead |
| Driving on a U.S. license too long | 6 months after you become resident | DGT | Start the Spanish license in your first months |
| Missing the TIE month | 1 month from your entry into Spain | Interior Ministry | Book the appointment in your first days |
| Letting the padrón lapse | 2 years without renewal | Town hall | Put the renewal date in your calendar |
Modelo 720: reporting what you own outside Spain
Spanish tax residents file Modelo 720 when assets outside Spain in any one of three blocks exceed 50,000 euros: accounts, securities and insurance, or real estate.
For bank accounts, the Agencia Tributaria’s own examples test two numbers: the balance on December 31 and the average balance of the last quarter. If either passes 50,000 euros, the accounts are reported, and accounts where you only hold signing authority count toward the total. For the 2025 tax year, the window ran from January 1 to March 31, 2026.
The fix is a January routine: every account outside Spain, its December 31 balance and its fourth-quarter average, written down before the window opens.
Your U.S. filings keep running
Moving to Spain does not end the FBAR: if your accounts outside the U.S. together exceed $10,000 at any time in the year, you report them on FinCEN Form 114, and your new Spanish accounts now count. According to the IRS, it is due April 15 with an automatic extension to October 15, and it is filed electronically with FinCEN, not with your tax return. FBAR civil penalties are adjusted each year for inflation.
Form 8938 is a separate test. For Americans living abroad, it applies above $200,000 on the last day of the year or $300,000 at any time for single filers, and above $400,000 or $600,000 for joint filers. The IRS lists a penalty of up to $10,000 for failing to file it, plus $10,000 for each 30 days of non-filing after an IRS notice, up to $60,000.
Working remotely on a non-lucrative visa
The Washington consulate states that the non-lucrative visa does not allow any work or professional activity, including remote work online, and it asks applicants to sign a notarized commitment not to work, on site or remotely.
Americans who plan to keep a U.S. job or U.S. clients should look at the telework visa, the digital nomad route that the same consulate lists for working online. The commitment you sign is part of the file the visa rests on.
Driving on your U.S. license past month six
A license issued outside the EU is valid for driving in Spain for at most six months after you acquire normal residence, according to the DGT, Spain’s traffic authority.
After that, you exchange it for a Spanish license only if the issuing country appears on the DGT’s list of exchange agreements; otherwise you need a new Spanish license, which means passing the tests. A license obtained after you became a legal resident in Spain cannot be exchanged, even from a country with an agreement. Check the DGT’s list before you count on an exchange, and start the Spanish license early enough to finish inside the six months.
Two deadlines that belong to your first month
Two deadlines arrive early: the TIE application, due within 1 month of entering Spain, and the padrón renewal, due every 2 years for non-EU residents without long-term residence. Both are covered step by step in your first month in Spain, in order, and the documents that expire before you even leave are in the pre-departure checklist.
Before your first Spanish tax year closes
Write down your entry date today, and on December 31 note the balance of every account you hold outside Spain.
The U.S. forms are manageable alone for many people with simple accounts. Spanish residency, Modelo 720 and the treaty questions interact, and the first year is when a cross-border tax professional is worth consulting, before you file anything in either country.
The Spain Navigator keeps these dates in one plan, alongside the visa and first-month steps.
FAQ
Do crypto holdings go on Modelo 720?
No. The Agencia Tributaria states that virtual currencies are not reported on Modelo 720. Crypto held abroad has its own informative declaration, Modelo 721, with its own rules, so check that form separately if you hold coins on a platform outside Spain.
Does a small Spanish account still count toward the FBAR?
Yes. The FBAR test is cumulative across every account outside the U.S.: if their combined balance tops $10,000 at any point in the year, each account is reported, including a small one. A $6,000 Spanish account and a $5,000 account elsewhere, held at the same time, cross the line.
Is Form 8938 filed together with the FBAR?
No. Form 8938 is attached to your U.S. income tax return and follows its due date, while the FBAR goes electronically to FinCEN through the BSA E-Filing System and is not part of your return. Filing one does not replace the other, and each has its own threshold.
Do short trips out of Spain reset the 183-day count?
No. The Agencia Tributaria counts sporadic absences toward your days in Spain unless you prove tax residence in another country. A few weeks away does not restart the count, so log your days from the date you arrive and keep your travel records.
Does filing Modelo 720 mean paying tax on those assets?
Not by itself. The Agencia Tributaria classes Modelo 720 as an informative declaration: it reports what you hold outside Spain. The income those assets produce is a separate question for your Spanish return and the U.S.-Spain tax treaty, which is where a cross-border adviser helps.
Sources
Official pages this guide was checked against, with the date we last read them.
- Contribuyentes por el IRPF (residencia habitual en territorio español), manual IRPF 2025
- Modelo 720: forma de calcular el límite que obliga a declarar
- Modelo 720: plazos de presentación
- Modelo 720. Declaración informativa sobre bienes y derechos situados en el extranjero
- Comparison of Form 8938 and FBAR requirements
- Non-working (Non-lucrative) Residency Visa
- Canje de permisos de países extracomunitarios
- Tarjeta de identidad de extranjero
- Renovación de las inscripciones padronales de los extranjeros no comunitarios sin autorización de residencia de larga duración
