US Social Security in Spain: Payments, Taxes and Totalization

The first surprise with US Social Security in Spain is not the payment but the second tax return. The United States keeps the right to tax the benefit, and Spain, once you are its tax resident, taxes it too and deducts what you paid the IRS. Beneath that sits the 1988 agreement, which decides which system you pay into while you work in Spain and how a split career becomes two pensions. This guide covers the tax split, payment in euros, totalization, the WEP repeal and the 2024 agreement, not yet in force. 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.

Does Spain tax your U.S. Social Security once you live there?

Yes, and so does the United States. Article 20 of the U.S.-Spain income tax convention states that social security benefits paid by one country to a resident of the other, or to a U.S. citizen, may be taxed by the paying country, and Spain taxes its residents on their worldwide income. The two claims coexist by design, and the treaty says which one steps back: under Article 24, where a resident of Spain has income the treaty lets the United States tax for a reason other than citizenship alone, Spain deducts the U.S. income tax actually paid, up to the part of the Spanish tax that corresponds to that income.

That last condition is the whole difference between a Social Security benefit and a 401(k). The treaty grants the United States a taxing right over Social Security in its own text, so the Spanish deduction is available. For a private pension or a retirement account the United States taxes you only because you are a citizen, and Spain deducts nothing; that side of the story is in how Spain taxes a 401(k) and IRA.

The U.S. layer

The SSA’s April 2026 publication on payments outside the United States states that a U.S. citizen is subject to U.S. income tax laws wherever they live, and that up to 85 percent of the benefit may be subject to federal income tax. The thresholds it gives are the familiar ones: as an individual filer, combined income of $25,000 to $34,000 can make up to 50 percent of the benefit taxable and more than $34,000 up to 85 percent, and on a joint return the bands are $32,000 to $44,000 and above $44,000. Combined income means adjusted gross income plus nontaxable interest plus half of the benefit.

The Spanish layer, and the return you may not have planned on

The Agencia Tributaria’s page on pensions from another country sets out the logic: a Spanish tax resident declares worldwide income, the treaty decides whether the taxing power is exclusive or shared, and where it is shared Spain, as the country of residence, removes the double tax with a deduction. Its 2025 manual classifies pensions from public social security regimes as employment income, whoever generated the right to them, which puts a U.S. benefit in the general base at the progressive scale used for salaries. The deduction for international double taxation is the lesser of the tax actually paid abroad on that income and the Spanish tax attributable to it.

The filing threshold is lower than most Americans expect. For the 2025 return, the Agencia Tributaria’s rules on who must file exempt employment income up to 22,000 euros a year in the general case, but only up to 15,876 euros when the payer is not required to withhold Spanish tax, and a foreign pension payer that does not operate in Spain is not. The same page adds that anyone who applies the deduction for international double taxation must file regardless of income. Claiming the credit for the U.S. tax therefore means filing, even below the threshold, and because nobody withholds Spanish tax on the benefit during the year, the whole Spanish bill is paid with the return.

What each country does with each stream

The treaty treats four kinds of retirement income differently, and a retired couple in Spain often has three of them. Read across for the stream you have.

The government pension row surprises retired teachers and federal employees most. Under Article 21 the pension stays taxable only in the United States as long as the recipient is not a Spanish national resident in Spain, and Spain’s own foreign pensions page notes that treaties can exempt a pension in Spain while still applying progressivity, meaning the exempt amount raises the rate on whatever else you declare.

Your payments continue, and can land in euros

The SSA’s publication states that a U.S. citizen may continue to receive payments while outside the United States, as long as they remain eligible and are in a country where the SSA can send payments, and Spain is one. Two mechanics follow from it. Benefits are calculated in dollars and the SSA does not raise or lower them for exchange rates, so a euro budget carries currency risk from the first month. And the SSA considers you outside the United States once you have been away for 30 days in a row, and back only after 30 days in a row inside the country, which is the definition that triggers its foreign reporting rules.

Getting paid in euros

Spain appears on the SSA’s international direct deposit list, and the agency’s operating manual for Spanish bank data sets the terms: payments to Spain go only to euro accounts at local banks, they are set up with form SSA-1199-SP or any document carrying the IBAN and SWIFT code, and the Federal Benefits Unit that serves Spain handles the input and chases missing details. The alternative is to keep the deposit in a U.S. account, which the SSA can use wherever you live, and move money across yourself.

Whichever you choose, the publication asks you to report your residence address even when payments go to a bank, and to list every family member moving with you. A direct deposit that keeps arriving is not proof that the SSA knows where you are.

The questionnaire that stops payments

The SSA mails beneficiaries outside the United States a questionnaire every year or every 2 years, between May and June. The annual cycle covers anyone aged 90 or over, anyone with a representative payee, and people drawing benefits on their own work record rather than as a spouse, survivor or parent. Spain is on the list of countries where everyone else is on the 2-year cycle, mailed in even-numbered years when the Social Security number ends in 00 to 49 and in odd-numbered years when it ends in 50 to 99. The publication is blunt about the consequence: if the questionnaire is not completed, signed and returned, payments stop. A Spanish mailbox that nobody checks in June is the most avoidable way to lose a benefit.

From Spain, the office that answers is the Federal Benefits Unit at the U.S. Embassy in Madrid, at Serrano 75, reachable at fbu.madrid@ssa.gov according to the SSA’s Spain agreement page, and the SSA’s international line is +1-410-965-0160.

The 1988 agreement: who you pay into while you work in Spain

The Agreement on Social Security between the United States and Spain, signed at Madrid on September 30, 1986 and in force since April 1, 1988, settles coverage with two rules. Under Article 4, a person employed within Spain is subject only to Spanish law for that employment, and a self-employed person who would otherwise be covered by both systems is subject only to the law of the country of residence. Under Article 5, an employee sent by a firm from one country to work in the other stays under the home system if the assignment is not expected to exceed five years, with one extension of at most one year when unforeseen circumstances prolong it, granted with the other country’s consent and requested before the initial five years run out.

For an American who moves to Spain and keeps working, the practical reading is this. A transfer arranged by a U.S. employer for a fixed period can stay under U.S. Social Security with a certificate of coverage issued by the SSA. An employee hired in Spain, or a self-employed American who resides there, pays into the Spanish system, and the SSA’s Spain page explains that a Spanish certificate, form E/USA 1 requested by the employer from the provincial office of the General Treasury of Social Security, is what proves the exemption from U.S. Social Security tax. Self-employed residents write to the same provincial office themselves.

The SSA page adds a warning that matters for health cover: a worker the agreement exempts from Spanish coverage pays nothing toward Spain’s other programs, including health insurance and unemployment, and generally cannot receive benefits from them.

Combining credits when neither career is complete

Under Article 17 of the agreement, the SSA counts Spanish periods toward a U.S. benefit only for a person who has at least six quarters of U.S. coverage and does not already qualify on U.S. credits alone; under Article 10, Spain counts U.S. periods only for a person with at least one year of Spanish coverage. The conversion rate is fixed in the text: one U.S. quarter equals 91 days of Spanish contributions, and periods that overlap are never counted twice.

What each country then pays is proportional. The United States computes a pro rata primary insurance amount from your U.S. earnings alone and the ratio of your U.S. coverage to a full coverage lifetime. Spain computes the theoretical pension you would have earned had every totalized period been Spanish, uses its minimum pension as a floor for that theoretical amount, and pays the share that matches the Spanish part of the total. Each country pays its own benefit, monthly, for the preceding month.

Spain’s own bar in 2026

Totalization fills the Spanish contribution requirement; it does not lower it. The Seguridad Social’s retirement requirements page sets the ordinary retirement age for 2026 at 65 for a person with at least 38 years and 3 months of contributions and at 66 years and 10 months for anyone with less, moving in 2027 to 65 with 38 years and 6 months and otherwise 67. The minimum contribution period is 15 years, or 5,475 days, of which at least 2 years must fall within the 15 years before the claim. An American with 6 years of Spanish contributions and 30 of U.S. coverage reaches the 15-year bar through totalization and receives a Spanish pension prorated to the 6 years.

Filing the claim

Article 24 of the agreement treats a claim filed in one country as a claim under the other country’s law too. From Spain, the SSA’s page names the Federal Benefits Unit in Madrid or any Spanish Social Security office as the place to file for U.S. or Spanish benefits, and it lists what a first claim needs: both countries’ social security numbers, proof of age, evidence of your U.S. earnings in the past 24 months, and details of your Spanish coverage. Spanish periods are documented by the informe de vida laboral, the contribution record the Seguridad Social issues.

The WEP is gone, and the SSA named foreign pensions

The Social Security Fairness Act, signed on January 5, 2025, ended the Windfall Elimination Provision and the Government Pension Offset, and the SSA’s page on the law, last updated July 21, 2025, lists people whose work had been covered by a foreign social security system among those affected. December 2023 was the last month either rule applied, so benefits payable for January 2024 and later are paid without the reduction, and the SSA reports that it completed more than 3.1 million past-due payments by July 7, 2025.

Two consequences for someone with a Spanish pension. If your U.S. benefit was already being reduced, the correction and the back payment happened without an application, as long as the SSA had your address and bank details. If you never applied for a U.S. benefit because the WEP made it look pointless, the SSA’s page says you may need to file now, and it is explicit that the law did not change the retroactivity of applications, which for retirement and survivor benefits is generally limited to six months before the month you apply. The April 2026 publication still asks beneficiaries to report a foreign pension received before January 2024, because the old rules apply to those months.

The 2024 agreement is signed, not in force

On April 8, 2024, Spain’s Minister of Inclusion, Social Security and Migration and the U.S. Ambassador signed a new Social Security agreement in Madrid, according to the Seguridad Social’s announcement. The SSA’s status table of agreements in force, read on September 25, 2026, lists for Spain only the 1986 agreement and its administrative arrangement, both effective April 1, 1988, on a page that already records an agreement with Romania taking effect on September 1, 2026. The new text has not entered into force.

What it will change, per the Spanish announcement, is worth knowing before you plan around it. Spain would run two calculations of a Spanish pension, one on Spanish contributions alone and one adding U.S. periods, and pay the higher; today, a person who qualifies on Spanish contributions alone gets the Spain-only figure even when the totalized one would be larger. The Spanish computation base would rest on actual contribution bases before the last day worked in Spain, which helps people who finish their careers in the United States. Spain’s Clases Pasivas regime for civil servants and the military would come within scope. And detachments would run up to 5 years, extendable by 2 more in exceptional circumstances with the competent authority’s approval. Until the SSA table changes, the rules that bind are the 1986 ones: five years plus one, and no second calculation.

Two rules that catch retirees who keep busy

Both come from the SSA’s own publication, and both apply to people who assumed the agreement or the treaty had settled things.

The first is the foreign work test. If you are younger than full retirement age, which the publication puts at 67 for people born in 1960 or later, the SSA withholds your benefit for each month in which you work more than 45 hours outside the United States and are not subject to U.S. Social Security taxes. It applies this even when you are exempt from those taxes under an international agreement. Hours count, not earnings, and a person who owns part of a business is treated as working even without drawing income from it. Dependents on your record lose the same months. Failing to report work outside the United States can bring a penalty on top.

The second is Medicare. The publication states that Medicare generally does not cover health services received outside the United States and that it may not be to your advantage to pay the Part B premium during a long absence, then gives the cost of changing your mind: a premium 10 percent higher for each 12-month period you could have been enrolled but were not. Cancelling Part B is done by notifying the SSA, and premiums continue for one more month after the month of notice. Whether the private policy that satisfied your Spanish visa can carry you until you decide is a separate question, and one to settle before the first 12-month period runs.

Before the first payment reaches Spain

Create or update your my Social Security account with your Spanish address, then choose where the money lands: if you want euros, ask the Federal Benefits Unit in Madrid for form SSA-1199-SP with your Spanish IBAN and SWIFT code, and if you want dollars, leave the U.S. direct deposit in place and confirm the address change separately.

Most retirees can do this alone: one benefit, a U.S. bank account, no work in Spain and no Spanish pension is a matter of an address update and one Spanish return a year with the deduction filled in. The cases that need a cross-border professional are specific: a Spanish contributory pension or a totalized claim in the mix, work in Spain before full retirement age, a government pension whose exemption has to be shown on the Spanish return, or a first-year situation where U.S. tax, Spanish tax and the credit have to be sequenced with the rest of your U.S. filings.

The calendar items, from the June questionnaire to the Spanish return and the 183-day count that makes you a Spanish tax resident, sit in the Spain Navigator, the app that puts every step of your move to Spain in order, next to the visa and the registrations they interact with.