US-Spain Tax Obligations — What Every American in Spain Must Know (2026)

The Double Tax Reality for Americans in Spain

The United States is one of only two countries in the world (the other being Eritrea) that taxes its citizens on worldwide income, regardless of where they live. This means that if you are an American citizen or green card holder living in Spain, you must file tax returns in both countries every year.

The good news: the US-Spain Tax Treaty and several IRS provisions help prevent most double taxation. The bad news: the compliance burden is significant, and penalties for non-compliance are severe. This guide breaks down exactly what you need to know.

Your US Tax Obligations from Spain

Annual Federal Tax Return (Form 1040)

You must file a US federal tax return every year, reporting your worldwide income including:

• Employment income (even if earned in Spain)
• Rental income from Spanish property
• Spanish bank interest
• Capital gains from selling Spanish property or investments
• Social Security benefits
• Pension and retirement account distributions

The filing deadline for Americans abroad is automatically extended to June 15, with a further extension available to October 15.

Foreign Earned Income Exclusion (FEIE) — Form 2555

If you work in Spain, you may exclude up to $130,000 (2026) of foreign earned income from US taxation using the FEIE. To qualify, you must meet either:

• Bona Fide Residence Test: You are a bona fide resident of Spain for an entire tax year
• Physical Presence Test: You are physically present in a foreign country for at least 330 full days during a 12-month period

Note: The FEIE only applies to earned income (salary, self-employment). It does NOT apply to investment income, rental income, or retirement distributions.

Foreign Tax Credit (FTC) — Form 1116

For income not covered by the FEIE (or if you choose not to use it), you can claim a Foreign Tax Credit for Spanish taxes paid. Since Spanish tax rates are generally higher than US rates for most income levels, the FTC often eliminates your US tax liability entirely.

You can choose between the FEIE and FTC each year, but switching back from the FEIE has a 5-year lock-out period. Many tax professionals recommend using the FTC exclusively for Americans in Spain.

US vs Spain: Income Tax Brackets Comparison (2026)

Note: Spain’s rates include both state (estatal) and regional (autonomica) components. Rates vary slightly by autonomous community. Andalusia rates shown.

FBAR — Report of Foreign Bank Accounts (FinCEN Form 114)

If the aggregate value of all your foreign financial accounts exceeds $10,000 at any point during the calendar year, you must file an FBAR. This includes:

• Spanish bank accounts (checking, savings)
• Spanish brokerage accounts
• Any account you have signature authority over (e.g., a business account)

Deadline: April 15 (automatic extension to October 15)
Filing: Electronically through FinCEN’s BSA E-Filing system (NOT with your tax return)
Penalties: Up to $12,906 per violation (non-willful) or $129,210 or 50% of account balance (willful)

FATCA — Form 8938 (Statement of Specified Foreign Financial Assets)

Separate from the FBAR, FATCA requires reporting on Form 8938 if your specified foreign financial assets exceed:

• Living in the US: $50,000 (single) / $100,000 (MFJ) at year-end, or $75,000 / $150,000 at any point
• Living abroad: $200,000 (single) / $400,000 (MFJ) at year-end, or $300,000 / $600,000 at any point

Form 8938 is filed with your tax return and covers a broader range of assets than the FBAR, including foreign pension plans and interests in foreign entities.

Spain’s Modelo 720 — Foreign Asset Declaration

Spain has its own version of foreign asset reporting: Modelo 720. If you have foreign assets (outside Spain) worth more than 50,000 EUR in any of three categories, you must report them:

1. Foreign bank accounts
2. Foreign securities, shares, and investment funds
3. Foreign real estate

For Americans in Spain, this means reporting your US bank accounts, 401(k)/IRA balances, brokerage accounts, and any US real estate to the Spanish tax authorities. The filing deadline is March 31.

Important: Spain’s Constitutional Court struck down the disproportionate penalties for Modelo 720 non-compliance in 2022, but the filing obligation remains. Current penalties are aligned with standard Spanish tax penalties.

The US-Spain Tax Treaty: Your Double Taxation Shield

The tax treaty between the US and Spain (in force since 1990) provides crucial protections:

• Employment income (Art. 14): Taxed primarily in the country where work is performed
• Pensions (Art. 17): Private pensions taxed in the country of residence; government pensions may be taxed by the paying country
• Real estate income (Art. 6): Taxed in the country where the property is located
• Capital gains on real estate (Art. 13): Taxed in both countries, with FTC relief
• Interest and dividends (Art. 10-11): Reduced withholding rates

Practical Tips: Minimizing Your Tax Burden Legally

1. Use the Foreign Tax Credit rather than the FEIE when Spanish taxes exceed US taxes (common for most income levels)
2. Time your move carefully — mid-year moves create split-year complications
3. Keep meticulous records of Spanish taxes paid (IRPF, IBI, Plusvalia) for FTC claims
4. Consider Roth conversions before moving — converting traditional IRA to Roth while still in the US avoids Spanish taxation on the conversion
5. Hire a cross-border tax specialist — generic US CPAs or Spanish gestores rarely understand both systems

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Last updated: March 2026. This guide reflects current 2026 tax treaties, IRS regulations, and Spanish immigration law.

CostaLuz Lawyers regularly advises American expats on their US-Spain tax obligations.

Reviewed by María Luisa de Castro, CEO at CostaLuz Lawyers — specialist in Spanish & cross-border tax for US expats — Updated 2026

This is general information, not definitive legal advice — every case requires individual analysis.

Source: the US$10,000 FBAR reporting threshold is set by the US Treasury’s Financial Crimes Enforcement Network (FinCEN Form 114, Report of Foreign Bank and Financial Accounts). US reporting thresholds and rules are set by US law and can change — confirm your current position with a US tax specialist. This is general information, not legal or tax advice.