US Social Security in Spain: Payments, Taxes and Totalization

With US Social Security in Spain, the first surprise is not the payment; it is the second tax return. The United States keeps the right to tax the benefit, and Spain, once you are its tax resident, taxes it as well and deducts what you paid the IRS. Underneath both sits the 1986 agreement, which decides which system you pay into while you work in Spain and how a career split between two countries becomes two pensions. 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?

It does, and so does the United States. Article 20 of the U.S.-Spain income tax convention provides 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, while Spain taxes its residents on their worldwide income. The two claims coexist by design, and the treaty states which one gives way: under Article 24, if a resident of Spain has income that 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 final condition is the whole difference between a Social Security benefit and a 401(k). Because the treaty itself grants the United States a taxing right over Social Security, 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. Citizenship alone, in other words, does not impress the Spanish side. That half of the matter is covered 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 says 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. Its thresholds are the familiar ones: for 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; on a joint return the bands are $32,000 to $44,000 and above $44,000. Combined income, for this purpose, is adjusted gross income plus nontaxable interest plus half of the benefit.

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

The logic is set out on the Agencia Tributaria’s page on pensions from another country: 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 places 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 a taxpayer whose income comes only from the listed sources, employment income up to 22,000 euros a year in the general case, but only up to 15,876 euros where the payer is not required to withhold Spanish tax, which a foreign pension payer that does not operate in Spain is not. Other income, such as U.S. dividends, can end that exemption. The same page adds that anyone who applies the deduction for international double taxation must file whatever their income. Claiming the credit for U.S. tax therefore means filing even below the threshold, and since nobody withholds Spanish tax on the benefit, the entire Spanish bill falls due 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 holds three of them; the row for each stream reads across.

The government pension row is the one that surprises retired teachers and federal employees most. Under Article 21, the pension remains taxable only in the United States as long as the recipient is not a Spanish national resident in Spain. Spain’s side of that rule carries a second condition, since Article 1(4)(b) preserves it only for people with no immigrant status in Spain, a term the treaty leaves undefined; a retiree living in Spain on a residence permit therefore cannot take the exemption for granted. Spain’s own foreign pensions page notes that a treaty can exempt a pension in Spain while still applying progressivity, which means the exempt amount raises the rate on whatever else you declare.

Your payments continue, and can land in euros

According to the SSA’s publication, a U.S. citizen may continue to receive payments while outside the United States, provided that they remain eligible and are in a country to which the SSA can send payments, and Spain is one. Two mechanics follow. Benefits are calculated in dollars, and the SSA does not raise or lower them for exchange rates, so a budget kept in euros carries currency risk from the first month. The SSA also 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, and it is that definition which triggers its foreign reporting rules.

Getting paid in euros

Spain is 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 to move money across yourself.

Whichever route you take, 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 does not prove that the SSA knows where you are.

The questionnaire that stops payments

Beneficiaries outside the United States receive an SSA questionnaire by mail 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 among the 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. On the consequence, the publication is blunt: if the questionnaire is not completed, signed and returned, payments stop. Of all the ways to lose a benefit, a Spanish mailbox that nobody checks in June is the most avoidable.

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

The 1986 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. Article 4 makes a person employed within Spain subject only to Spanish law for that employment, and a self-employed person who would otherwise be covered by both systems subject only to the law of the country of residence. The SSA’s Spain page adds that someone self-employed who moves the activity to the other country for five years or fewer stays covered at origin, a rule Article 4 does not state; confirm it with the SSA. Article 5 keeps an employee sent by a firm from one country to work in the other under the home system if the assignment is not expected to exceed five years, with one extension of at most one year where unforeseen circumstances prolong it, granted with the other country’s consent and requested before the initial five years run out.

For an American who goes on working in Spain, if a U.S. employer arranges a transfer for a fixed period, the worker can stay under U.S. Social Security with a certificate of coverage issued by the SSA. If the employee is hired in Spain, or is self-employed and resides there, contributions go to the Spanish system, and the SSA’s Spain page explains that the exemption from U.S. Social Security tax is proved by a Spanish certificate, form E/USA.1, which the employer requests from the provincial office of the General Treasury of Social Security. Self-employed residents write to that same provincial office themselves.

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

Combining credits when neither career is complete

Article 17 of the agreement lets the SSA count 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; Article 10 bars Spain from granting a benefit on under one year of Spanish periods, with a narrow exception. The conversion is fixed in the text: one U.S. quarter per 91 days of Spanish contributions in a calendar year, a remainder counting as one more quarter, at most four a year, and overlapping periods 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 matching 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 without lowering 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; in 2027 it moves 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. For example, an American with 6 years of Spanish contributions and 30 of U.S. coverage can reach the 15-year bar through totalization, subject to Spain’s other conditions, and the pension is prorated to the 6 years.

Filing the claim

Under Article 24 of the agreement, a claim filed in one country can also count as a claim under the other country’s law, if it is in writing and asks for that or shows coverage there. 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. The informe de vida laboral, the contribution record the Seguridad Social issues, is the usual way to show them.

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, includes people whose work had been covered by a foreign social security system among those affected. Since December 2023 was the last month either rule applied, benefits payable for January 2024 and later are paid without the reduction; the SSA reports more than 3.1 million past-due payments completed by July 7, 2025.

For someone with a Spanish pension, two consequences follow. If your U.S. benefit was already being reduced, the correction and the back payment came without an application, provided that 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, since the old rules govern those months.

The 2024 agreement is signed, not in force

According to the Seguridad Social’s announcement, Spain’s Minister of Inclusion, Social Security and Migration and the U.S. Ambassador signed a new Social Security agreement in Madrid on April 8, 2024. The SSA’s status table of agreements in force, read on September 25, 2026, still 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, in short, is not in force.

What it would change, according to the Spanish announcement, deserves attention before anyone plans 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; at present, a person who qualifies on Spanish contributions alone receives the Spain-only figure even where 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. The text sent to the Cortes also places workers, employed or self-employed, under the law of the country where they work (article 6), whereas the 1986 agreement looks to residence for the self-employed. Until the SSA table changes, the binding rules 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.

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, and it does so even where an international agreement exempts you from those taxes. 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, and failing to report work outside the United States can bring a penalty on top.

The second is Medicare. According to the publication, Medicare generally does not cover health services received outside the United States, and paying the Part B premium during a long absence may not be to your advantage; it then states the cost of changing your mind, a premium 10 percent higher for each 12-month period you could have been enrolled but were not. Part B is cancelled 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. The Part B penalty, the enrollment windows on return and what Part D allows from Spain are set out in the visa health insurance and Medicare guide. For care in Spain itself, the dental care guide covers what the public system pays for at the dentist, and the pharmacy guide how prescriptions are refilled.

Before the first payment reaches Spain

The first steps are administrative. Your Spanish address is reported to the SSA or the Federal Benefits Unit in Madrid by phone, mail or in person, and then the money’s destination is chosen: for euros, form SSA-1199-SP or any document with your Spanish IBAN and SWIFT code goes to the Federal Benefits Unit; for dollars, the U.S. direct deposit stays in place and the address change is confirmed separately.

For a retiree with one U.S. benefit, a U.S. bank account, no work in Spain and no Spanish pension, the checklist is short: an address update and one Spanish return a year with the deduction filled in, besides the U.S. return and any Modelo 720 duty. A cross-border professional is worth hiring for a Spanish contributory pension or a totalized claim, work in Spain before full retirement age, a government pension whose exemption has to be shown on the Spanish return, or a first year in which U.S. tax, Spanish tax and the credit must 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, beside the visa and the registrations they interact with.