U.S. Taxes While Living in Spain

Expat Tips Published: 28 July 2025 11:21 CET Updated: 31 July 2025 18:09 CET

Living in a foreign country is a dream for many people. The fascinating culture, ancient architecture, new cuisine, and warm climate can make it a truly exciting experience. But alongside the adventure comes the less glamorous side: paperwork, legal obligations, and taxes. One of the biggest challenges for U.S. citizens living in Spain is understanding how their American tax obligations interact with the Spanish system. The guide below will help you navigate both, avoid penalties, and understand how each system works.

U.S. tax obligations for expats

Unlike most countries, the United States taxes its citizens on their worldwide income—no matter where they live. This includes wages, dividends, rental income, and capital gains. As a result, Americans must file an annual U.S. tax return (Form 1040) every year, even if they live full-time in Spain and pay tax there.

Many U.S. expats wrongly assume that living abroad means they only pay tax in Spain. Unfortunately, this is not the case. However, there’s no need to panic: the U.S. tax code provides several mechanisms that prevent Americans from being taxed twice on the same income. These must be claimed proactively, but they typically eliminate most, if not all, U.S. tax liability.

The Spanish tax system

Spain has a progressive tax system: the more you earn, the higher your tax rate. Tax bands vary by region, but most sit between €19,000 and €47,000 for common brackets.

You are considered a Spanish tax resident if:

You live in Spain for more than 183 days in a calendar year; or
Your primary economic interests are in Spain (e.g., most of your income is earned there).

Spanish tax residents must declare and pay tax on worldwide income. Non-residents pay Spanish tax only on income earned within Spain. If you become a Spanish tax resident, you must report your U.S. income as well—but U.S. tax protections can prevent double taxation.

U.S.–Spain Income Tax Treaty

The bilateral tax treaty between the U.S. and Spain determines which country has primary taxing rights over different types of income. It helps avoid double taxation by allowing you to apply for tax credits or exemptions on your U.S. return when income has already been taxed in Spain.

Foreign Earned Income Exclusion (FEIE)

The FEIE is one of the most valuable benefits for U.S. expats. It allows you to exclude up to $126,500 (2024 amount, adjusted annually) of foreign earned income from U.S. tax. To qualify, you must meet one of these tests:

Bona Fide Residence Test: You must reside in a foreign country for an uninterrupted period that includes an entire tax year.
Physical Presence Test: You must be physically present in one or more foreign countries for at least 330 full days in any 12-month period.

The FEIE applies only to earned income—salary or self-employment—not passive income such as dividends, interest, or capital gains.

Foreign Tax Credit (FTC)

Many expats use the Foreign Tax Credit (Form 1116) instead of, or in combination with, the FEIE. The FTC gives you a dollar-for-dollar credit for foreign taxes paid. You cannot claim a credit for foreign taxes on income that has already been excluded via the FEIE.

Foreign Bank Account Report (FBAR)

You must file an FBAR (FinCEN Form 114) if the total value of your foreign financial accounts exceeds $10,000 at any time during the year. This is filed separately from your tax return and must be submitted by April 15.

Penalties for failing to file are extremely high, so it’s essential to monitor all accounts carefully.

FATCA

Under the Foreign Account Tax Compliance Act (FATCA), U.S. citizens must file Form 8938 with their tax return if their foreign assets exceed certain thresholds. For expats, the thresholds are:

$200,000 at year-end or $300,000 at any time (single)
$400,000 at year-end or $600,000 at any time (married filing jointly)

FATCA and FBAR are separate, and many expats must file both.

Spanish tax deductions and exemptions

Spain offers several deductions that reduce taxable income, including:

Social security contributions
Pension contributions
Certain mortgage interest payments
Deductions for dependent family members

If you are a Spanish tax resident, you must still report your Spanish income to the U.S.—but U.S. tax credits usually prevent double taxation.

Self-employment taxes for U.S. expats

If you are self-employed in Spain, you may be required to pay U.S. self-employment tax (Social Security + Medicare) in addition to Spanish autónomo contributions. However, the U.S.–Spain totalization agreement typically prevents double contributions by allowing you to pay into just one country’s social security system—whichever you are officially covered under.

Obtaining professional help

The interaction between U.S. and Spanish tax laws can be extremely complex. Many expats choose to work with a tax professional who specializes in cross-border U.S.–Spain taxation to ensure compliance and optimize their tax position.

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