US-Spain Taxes for Americans (2026): FBAR, FATCA, Modelo 720, and the Treaty Explained

The US-Spain Tax Situation in 60 Seconds

The core fact that catches Americans off guard is that the United States taxes based on citizenship, not residence. Moving abroad does not end your US filing obligation. Spain, meanwhile, taxes its residents on worldwide income the same way. The result is two parallel systems that you reconcile every year using credits and the treaty, rather than one system switching off.

This guide is current as of 2026. Tax thresholds, rates, and rules change every year, and autonomous communities in Spain set their own numbers. Treat every figure below as a starting point to verify, not as a final answer. For US rules, check IRS Publication 54 and the instructions for Form 1040, Form 8938, and FinCEN Form 114. For Spanish rules, check the Agencia Tributaria and the BOE. Before you act, engage a licensed tax professional who works in both jurisdictions.

IRS Still Wants You: Form 1040 From Abroad

You keep filing a US federal income tax return from Spain. If your worldwide income exceeds the filing threshold for your status, Form 1040 is due every year, reporting wages, self-employment income, investment income, and foreign income alike. Living abroad does not change what is reportable; it changes which reliefs you claim to avoid paying twice.

As of 2026, Americans living outside the United States receive an automatic extension to file until June 15, with a further extension available on request. Any tax actually owed is still due by the regular April deadline, so interest can accrue even during the automatic extension. Verify the current dates and thresholds in the Form 1040 instructions and IRS Publication 54 before you plan around them.

The two main mechanisms that prevent double taxation on your US return are the Foreign Earned Income Exclusion (Form 2555) and the Foreign Tax Credit (Form 1116). They are covered in the next sections. You generally choose the combination that produces the lowest overall tax, and that choice interacts with Beckham Law and with the type of income you earn.

Foreign Earned Income Exclusion: When It Works, When It Does Not

The Foreign Earned Income Exclusion (FEIE) lets qualifying Americans exclude a band of foreign earned income from US tax. To qualify you meet either the physical presence test, spending enough full days abroad in a 12-month period, or the bona fide residence test, establishing genuine residence in Spain across a full tax year. The exclusion amount is indexed and changes annually, so verify the current figure in the Form 2555 instructions.

The FEIE helps in some situations and hurts in others:

• It works when your income is earned (wages or self-employment), sits near or below the exclusion amount, and your Spanish tax on that income is low, for example early in a move or under a favorable regime.
• It does not work for passive income such as dividends, interest, rental income, and capital gains, none of which the FEIE covers.
• It is often not the best tool in Spain because Spanish tax rates are frequently higher than US rates, which means the Foreign Tax Credit can wipe out US tax entirely and also generate carryover credits, something the FEIE does not do.

For many Americans in Spain, the Foreign Tax Credit is the stronger choice, and some use a blend. The comparison below is a simplified orientation, not a recommendation. Model both against your actual numbers with a professional, and verify each rule against current IRS guidance.

FBAR (FinCEN 114): The $10,000 Aggregate Threshold

The FBAR is the Report of Foreign Bank and Financial Accounts, filed electronically as FinCEN Form 114. As of 2026, you must file it if the combined high balance of all your foreign financial accounts exceeds 10,000 US dollars at any point during the year. The test is aggregate, so several modest accounts can cross the line together even if none does alone.

The FBAR is an information report, not a tax, but the penalties for missing it are serious, especially where non-filing is treated as willful. Reportable accounts include Spanish checking and savings accounts, some investment accounts, and accounts over which you have signature authority even if you do not own them. Verify the current threshold, deadline, and account definitions in the FinCEN 114 instructions, and confirm your specific situation with a professional.

FATCA (Form 8938): Higher Thresholds, Overlaps With FBAR

FATCA reporting uses Form 8938, filed with your Form 1040, to report specified foreign financial assets when they exceed thresholds that are higher than the FBAR and that depend on your filing status and on whether you live abroad. Living in Spain generally raises the thresholds compared with living in the United States. Because the thresholds and asset definitions differ from FBAR, many Americans file both forms and report overlapping but not identical information.

The distinction matters because the two regimes are enforced by different agencies with different penalties. Treat them as separate obligations you check independently each year. The table below summarizes the general contrast as of 2026. Verify each figure against the current FinCEN 114 and Form 8938 instructions before relying on it.

Spain's Modelo 720: The Foreign Asset Report Americans Miss

Modelo 720 is Spain's annual informational declaration of assets held outside Spain. Spanish tax residents report foreign accounts, foreign securities and investments, and foreign real estate when the value in a category exceeds the reporting band. For an American in Spain, that includes US bank accounts, US brokerage and retirement accounts, and US property. It is informational, but it is a Spanish obligation many newcomers do not know exists until it is late.

The Modelo 720 penalty regime was widely criticized and then softened after a 2022 European Court of Justice ruling found the old fixed penalties disproportionate. The reporting obligation itself remains, and once you file, you generally only refile in later years when a category grows past a set increase. Verify the current thresholds, the reporting bands, and the penalty rules with the Agencia Tributaria and a Spanish tax adviser, because this is an area that has changed and could change again.

Because Modelo 720 overlaps conceptually with FBAR and FATCA but is a separate Spanish filing on Spanish rules, we treat it as its own workstream. See our dedicated Modelo 720 guide for Americans and our comparison of FATCA and FBAR filing from Spain.

Spanish Tax Residency: The 183-Day Rule and Center of Economic Interests

Spanish tax residency is what switches on Spain's claim to your worldwide income, and it does not depend on your visa. As of 2026, you are generally a Spanish tax resident for a calendar year if any of these apply:

• The 183-day rule: you spend more than 183 days in Spain during the calendar year, counting sporadic absences unless you prove tax residence elsewhere.
• Center of economic interests: the main base of your activities or economic interests is in Spain, even if you are physically present fewer days.
• Family ties: your spouse and dependent children habitually reside in Spain, which raises a presumption of residence that you must rebut.

Spanish residency is generally an all-or-nothing status for the full calendar year, so arriving mid-year can still make you resident for the whole year depending on the day count. This is decisive for planning, because your residency start date determines which year your worldwide income becomes Spanish-taxable and whether Beckham Law is available. Verify the rules with the Agencia Tributaria and confirm your own start date with a Spanish adviser, as the tie-breaker provisions of the US-Spain treaty can also come into play.

Spanish Tax Rates for American Residents

Spain taxes resident income in two broad baskets, each on its own progressive scale, and the general basket rates vary by autonomous community. As of 2026, the general base (employment, self-employment, rental, and pension income) is taxed on a combined state and regional scale that climbs through several brackets and reaches into the mid-40s in percentage terms for high earners, higher in some regions. The savings base (interest, dividends, and capital gains) follows a separate, lower progressive scale.

Because roughly half of the general-base rate is set regionally, your total rate in Valencia differs from Madrid or Andalusia. The figures below are illustrative of the structure as of 2026, not a precise schedule, and they exclude regional variation. Verify the current brackets for your autonomous community against the Agencia Tributaria and the relevant regional rules.

Beckham Law: When It Makes Sense for Americans

The Beckham Law is a special expatriate regime that can dramatically lower Spanish tax for qualifying newcomers. Under it, an eligible person is taxed broadly like a non-resident for up to six years: Spanish-source employment income is taxed at a flat rate up to a threshold, and most foreign income generally stays outside the Spanish tax base. For an American with substantial US-source investment income, that exclusion of foreign income can be the whole point.

The regime has strict conditions. You generally cannot have been a Spanish tax resident in the recent past, you must move for a qualifying reason such as an employment relationship or certain qualifying activities, and you must elect the regime within a short deadline after starting your Spanish social security or activity. It does not automatically help everyone, and for some it removes access to treaty benefits and to certain credits. Confirm your eligibility and the current rules with a Spanish adviser.

Beckham Law frequently pairs with the Digital Nomad Visa, and it interacts heavily with your US filing. See our detailed Beckham Law page for eligibility, deadlines, and the US-side coordination.

Roth IRA and 401(k) in Spain

US retirement accounts are one of the sharpest edges of cross-border tax. Spain does not automatically recognize the US tax-free treatment of a qualified Roth IRA. Where the United States would let qualified Roth withdrawals come out tax-free, Spain may tax the distribution or the growth under its own rules, which can erase the Roth advantage for a Spanish tax resident. This surprises people who assumed their Roth was untouchable.

Traditional 401(k) and IRA distributions raise their own questions about how the US-Spain treaty allocates taxing rights on pensions and how Spain characterizes the income. The answer depends on the account type, the treaty article, your residency, and whether you are under the Beckham regime. Before you take any distribution as a Spanish resident, get a written cross-border analysis, and verify treaty positions against the current treaty text and IRS and Agencia Tributaria guidance.

Social Security While Living in Spain (Totalization Agreement)

The United States and Spain have a totalization agreement that decides which country's social security system you pay into, so you are not contributing to both on the same work. Which country applies depends on your employment situation: employees posted temporarily by a US employer, locally hired employees, and the self-employed are treated differently. A certificate of coverage documents where you are covered and exempts you from the other country's contributions on that income.

The agreement also lets you combine, or totalize, credits from both systems to qualify for benefits you might not reach under one system alone, though the benefit is then calculated proportionally. If you are self-employed and moving to Spain, this determination matters a great deal, because Spanish self-employment (autónomo) contributions differ from US self-employment tax. Verify your coverage with the Social Security Administration and Spanish social security, and get a certificate of coverage before you rely on an exemption.

Medicare While Living in Spain

Original Medicare generally does not pay for healthcare you receive outside the United States. Living in Spain, your everyday coverage comes from the Spanish public system if you contribute through work or the convenio especial, or from private health insurance, which visa applicants often need anyway. Medicare is not a solution for care in Spain.

Many American retirees still weigh whether to keep paying Medicare Part B premiums while abroad. Keeping Part B preserves immediate access if you return to the United States for care, but you pay premiums for coverage you cannot use in Spain, and dropping and re-enrolling later can bring lifetime late-enrollment penalties. This is a personal cost-benefit decision. Confirm the current rules and penalty mechanics with the Social Security Administration and Medicare before deciding.

Wealth Tax Considerations

Spain taxes wealth, which is unusual to Americans. As of 2026, resident individuals can owe an annual wealth tax on worldwide net assets above a regional exempt threshold, with the family home partially sheltered up to a limit. Separately, a national solidarity tax on large fortunes targets very high net worth and coordinates with the regional wealth tax so the same wealth is not taxed twice by both.

The practical picture varies enormously by autonomous community: some regions apply a large relief that reduces regional wealth tax to near zero, while others levy it in full, which is a real factor in choosing where in Spain to live. The Beckham regime can also limit the wealth tax base to Spanish assets for those who qualify. Because thresholds, reliefs, and the solidarity tax change by year and region, verify the current numbers for your community with the Agencia Tributaria and a Spanish adviser, especially if you have significant assets.

Capital Gains Tax Treatment

Capital gains are taxed by both countries, and reconciling them takes care. Spain taxes a resident's worldwide capital gains in the savings base on a progressive scale that, as of 2026, begins in the high teens and rises for larger gains. The United States taxes the same gains under its own rules, and the Foreign Tax Credit is the usual tool to avoid paying twice, though timing differences between the US and Spanish tax years can complicate the credit.

Investment structure matters as much as the rate. US mutual funds and ETFs held by a Spanish resident, and non-US funds held by a US citizen, can trigger unfavorable rules such as the US passive foreign investment company (PFIC) regime, and Spain has its own treatment of collective investment vehicles. The interaction can turn a simple-looking portfolio into a reporting problem. Get professional advice before selling appreciated assets or restructuring investments after a move, and verify each rule against current IRS and Agencia Tributaria guidance.

Inheritance Tax by Autonomous Community

Spanish inheritance and gift tax (Impuesto sobre Sucesiones y Donaciones) is set and largely controlled by the autonomous communities, so the tax on the same inheritance can differ dramatically depending on where the deceased and the heirs reside and how closely they are related. Some regions grant reliefs that reduce the bill close to zero for a spouse or children, while others tax transfers meaningfully. Unlike the US system, the tax generally falls on the recipient, and there is no large universal exemption like the US federal estate tax exclusion.

For an American family in Spain, this means estate planning built around US rules can produce an unexpected Spanish bill, and the US estate tax remains a separate system layered on top. Cross-border estate planning, including how residency in a particular community affects the outcome, should be done with advisers in both countries. Verify the current reliefs and rates for your specific autonomous community, because they change and vary widely.

Frequently Asked Questions