Totalization Agreements: How Your Working Years in Two Countries Turn Into One Pension

Published on: July 10, 2026

Last verified: 9 July 2026. Social security rules are country-specific and depend on individual records. Verify before acting.

Two people retire in the same coastal town in Portugal on the same day.

The first worked twenty-two years in the United States and fourteen in Germany. She qualifies for a pension from both. Neither is large, but together they clear her living costs, and she stopped paying American self-employment tax the year she moved.

The second worked eighteen years in the United States and fifteen in Thailand. He qualifies for a full pension from neither. During the Thai years he paid into both systems simultaneously and got nothing extra for it.

Nothing distinguishes these two careers except a document neither of them signed: a bilateral social security agreement, known in American usage as a totalization agreement. The United States has one with Germany. It does not have one with Thailand.

This is the least glamorous topic in cross-border financial planning and one of the most consequential. It determines whether a decade of contributions counts or evaporates. And almost everybody who needs to understand it discovers it a decade too late.

Key takeaways

• These agreements do exactly two things: they prevent you paying social security contributions to two countries on the same earnings, and they let you combine coverage periods from both countries in order to qualify for a benefit.
• Aggregation lets you qualify; it does not double your pension. Each country pays a partial, pro-rata benefit reflecting only the contributions actually made there.
• The instrument is a certificate of coverage, an A1 within the EU, an SSA-issued certificate for the US. Without it, the host country can demand contributions even where an agreement exists.
• The United States has 30 agreements in force. China, India, Mexico, Singapore, Thailand, the Philippines, Indonesia and most Gulf states are not among them.
• You cannot choose which system covers you. The agreements assign coverage by objective rules. Election is not permitted.
• Two American provisions that used to punish expats with foreign pensions, WEP and GPO, were repealed by the Social Security Fairness Act, signed on 5 January 2025. They no longer apply to benefits payable for January 2024 and later.
• The self-employed expat in a non-agreement country is the worst-placed person in this entire system.

Three different things people confuse

Before anything else, separate these. They are governed by different rules and different documents.

1. Coordination of state social security. Whether your contribution years in Country A count toward a state pension in Country B, and which country you pay contributions to while working abroad. This is what totalization agreements do. This article is about this.

2. Transferring a private or occupational pension. Moving a workplace or personal pension pot across a border, the UK's QROPS regime and its equivalents. A totalization agreement has nothing to do with this.

3. Whether your state pension keeps rising once you emigrate. Annual indexation of a state pension paid to a resident abroad. This is a separate question governed by separate rules, and the answer differs country by country. The UK, famously, uprates its state pension in some destinations and freezes it in others.

Get these three straight and half the confusion in expat forums disappears.

What a totalization agreement actually does

The Social Security Administration is unusually clear on this. The agreements have two main purposes, and for the United States a third that matters more than people realise.

Purpose one: eliminating dual coverage

The problem is structural. Most countries impose social security contributions on anyone working within their territory. The United States goes further and covers its citizens and resident non-citizens employed abroad by American employers regardless of how long the assignment lasts. American citizens and residents who are self-employed outside the United States remain covered by the US system even if they maintain no US business operations at all.

The result, without an agreement, is that the same earnings get taxed twice, and the worker usually receives no additional benefit protection for the second set of contributions, because a few years abroad is rarely enough to become insured under the host country's system. In the SSA's own phrase, for all practical purposes those contributions are lost.

Agreements fix this with a hierarchy of rules:

The territoriality rule. The default: you are covered by the country where you actually work.

The detached-worker exception. If your employer temporarily transfers you abroad, you stay covered by the sending country. In US agreements this generally applies to assignments expected to last five years or less, a longer window than most countries' agreements allow. The rule can even survive an intermediate posting: an employee sent from New York to a non-agreement country for four years, then to London for four more, can still be exempted from UK coverage, provided they were originally sent from the United States and remained under US coverage throughout.

Italy is the exception. The US-Italy agreement contains no detached-worker rule at all. Coverage for expatriate workers turns principally on nationality: an American citizen employed or self-employed in Italy who would be covered by US Social Security absent the agreement remains covered by it and is exempt from Italian contributions.

Self-employment. Some agreements assign coverage to the worker's country of residence. Others permit a self-employed person to transfer their activity temporarily and remain in the home system. This is country-specific, and it is precisely where the largest and most avoidable mistakes get made.

Special exceptions. Every agreement lets the two authorities grant a departure from the normal rules by mutual consent, for instance extending coverage for an assignment that unexpectedly runs a few months past the five-year limit. The SSA is explicit that this provision is invoked infrequently and only in compelling cases. It is not a planning tool.

And the misconception the SSA specifically warns about

The agreements do not allow a worker or an employer to elect which system to contribute to.

They exempt a worker from one system when their work would otherwise be covered by both. That is all. If you have been told you can pick, you have been told wrong.

Purpose two: filling gaps in benefit protection

Most pension systems require a minimum period of coverage before they will pay anything. In the United States, a worker reaching age 62 generally needs 40 quarters of coverage to be insured for retirement benefits. Ten years. Divide a career across two countries and it is entirely possible to fall short in both.

Under an agreement, coverage periods earned in the other country are counted toward meeting the minimum. The SSA calls this totalizing.

Three constraints define the shape of the benefit:

1. There is a floor. The SSA can only totalize where the worker has at least six quarters of US coverage. Below that, there is nothing to build on.
2. You must still have some coverage in the other country too. The reciprocal rule applies: the foreign system may require a minimum period of its own before it will count US coverage.
3. What you receive is a partial benefit, based on the proportion of your total career completed in the paying country.

That third point is where expectations collapse. The mental model people arrive with is addition: twenty-two US years plus fourteen German years equals thirty-six years of a full pension from somewhere. That is not what happens.

The mental model that is correct is closer to this: each country computes a theoretical benefit, what it would pay if your entire combined career had been spent under its system, and then pays you a pro-rata fraction of that theoretical amount, reflecting only the portion of the career actually covered there.

Totalization is a qualifying mechanism, not a multiplying one. It converts "you get nothing from either" into "you get something from each."

Purpose three (US-specific): unrestricted payment abroad

American totalization agreements also permit the unrestricted payment of benefits to residents of the two countries. This is not trivial. The SSA cannot send payments to residents of certain countries at all, and pays into others only under conditions. Check the SSA's own screening tool for your destination before you build a retirement plan around a monthly deposit.

The certificate of coverage: the document that does the work

An agreement in force does not, by itself, stop a foreign tax authority from demanding contributions. The certificate does.

• In the United States, the SSA issues a Certificate of Coverage. Employers request them for transferred employees; self-employed people request their own.
• Within the EU/EEA and Switzerland, the equivalent is the A1 certificate, issued by the competent institution of the state whose legislation applies.
• Other agreement partners issue their own equivalents, and the agreement text designates which agency does so.

How it is used:

• A US worker sent to the United Kingdom presents an SSA certificate to prove exemption from UK contributions.
• A UK-based employee working temporarily in the US presents a UK certificate; the employer stops withholding US Social Security tax and keeps the certificate on file in case the IRS asks why.
• A self-employed US citizen or resident attaches a photocopy of the foreign certificate to their US tax return each year, as proof of exemption from US self-employment tax. Revenue Procedure 84-54 makes the foreign certificate the evidence of that exemption for the period it covers.

Practical points that cost people money:

• Apply before the assignment or the move, not after. Processing takes time, and retroactive relief is not guaranteed.
• Some destination authorities require the certificate to be authenticated, an apostille, for Hague Convention countries, before they will accept it.
• Certificates expire and must be extended. The five-year detached-worker window is a limit on the exemption, not on the paperwork.
• Not all social insurance travels with the certificate. Agreements typically cover retirement, survivors and disability programmes (and, for the US, Medicare taxes). Some cover additional host-country programmes such as short-term sickness, work accident or unemployment insurance, and where a worker is exempted from those, they generally cannot claim benefits from them either. If you are exempted from a country's unemployment or accident insurance, arrange private cover.

The 30 countries with US agreements in force

With entry-into-force dates, per the SSA:

Who is not on this list, and where dual contributions are therefore a live risk: China, India, Mexico, Singapore, Thailand, Indonesia, the Philippines; the United Arab Emirates, Saudi Arabia, Qatar, Kuwait and most other Gulf states; and most of Latin America outside Brazil, Chile and Uruguay. Some agreements have been signed but never brought into force, the SSA's status table, not press coverage, is the authority on what is actually operative.

Other countries maintain their own bilateral networks. The United Kingdom, Canada, Australia, Japan, Türkiye and many others each publish lists of partner countries. A US agreement's absence tells you nothing about whether an agreement exists between two other countries.

The European Union works differently

Inside the EU, EEA and Switzerland, there is no bilateral treaty to look up. Social security is coordinated, not harmonised, by EU regulation, principally Regulation (EC) 883/2004 and its implementing regulation 987/2009.

Coordination rests on four principles:

• A single applicable legislation. You are subject to one member state's system at a time, never two.
• Equal treatment. No discrimination on grounds of nationality.
• Aggregation of periods. Insurance periods completed in any member state count toward qualifying elsewhere.
• Exportability. Benefits you have earned generally follow you across borders.

Each member state pays its own pro-rata pension. You generally file a single claim in your country of residence and it is transmitted onward. The A1 certificate governs postings and multi-state workers.

The United Kingdom, post-Brexit, is coordinated with the EU through the Protocol on Social Security Coordination annexed to the Trade and Cooperation Agreement, alongside the transitional protections of the Withdrawal Agreement, a narrower arrangement than membership, and a separate one from the pre-existing US-UK bilateral agreement.

What changed for Americans in 2025

For decades, two provisions of American law reduced Social Security benefits for people who also received a pension from work not covered by US Social Security. That category expressly included many foreign pensions.

• The Windfall Elimination Provision (WEP) reduced a worker's own retirement or disability benefit.
• The Government Pension Offset (GPO) reduced spousal and survivor benefits by two-thirds of the non-covered pension, frequently to zero.

The Social Security Fairness Act was signed into law on 5 January 2025. It repealed both. December 2023 was the last month to which WEP and GPO applied; they do not apply to benefits payable for January 2024 and later. The SSA began adjusting monthly payments in February 2025 and issued retroactive lump sums back to January 2024.

For anyone with a career split between the United States and abroad, this is a material improvement in the arithmetic of retiring overseas. If you decided years ago not to claim a spousal benefit because you were told GPO would reduce it to nothing, that calculation has changed and you may need to file a fresh application, the SSA has said that in some situations no action is required, and in others it is.

Two things the repeal did not do. It did not change eligibility requirements. And it did not change how benefits are taxed, which is a treaty question, not a totalization question. Income tax treaties, not social security agreements, determine which country may tax a social security benefit. Nor do totalization agreements cover Medicare benefits or Supplemental Security Income; those do not travel.

The self-employed expat: the sharpest edge in the system

If you are an American citizen freelancing from Lisbon, an agreement country, you can generally rely on the US-Portugal agreement, obtain the appropriate certificate, and pay into one system.

If you are an American citizen freelancing from Bangkok, Dubai or Mexico City, there is no agreement. You remain covered by US Social Security because US coverage follows the citizen, and you are also covered by the host country because most countries cover anyone working in their territory. You may owe both.

And the American relief most expats rely on does not help. The Foreign Earned Income Exclusion reduces income tax, not self-employment tax. A self-employed US citizen in a non-agreement country faces the full US self-employment tax on net self-employment income with no exclusion, on top of whatever the host country charges.

There is no clever structure that solves this in a paragraph. There are only three honest options: relocate to an agreement country, restructure the business in a way that changes the character of the income (which requires real advice and carries real risk), or budget for it.

The playbook

Ten years before retirement

• Reconstruct your coverage history in every country you have worked in. Request statements from each system now, while records are retrievable and you can still remember the employer's name.
• Identify which countries you fall short of the minimum in.
• Check whether an agreement exists between the countries in question, and whether it is in force, not merely signed.

Five years before

• Model your pro-rata benefit from each country. Note the currency each is paid in.
• Confirm whether your intended country of residence can receive payments from each system.
• If you are still working abroad, verify that the correct certificate of coverage is on file, and that its validity covers the whole assignment.
• Check whether the pension income you expect satisfies the minimum-income threshold of any residence visa you are counting on. Many passive-income and retirement visas set a monthly floor. The country that pays you, and the currency it pays in, can determine whether you clear it.

One year before

• File your claim. Under an agreement, you may generally apply in one country and ask that the application be treated as a claim in the other; the information is transmitted and each country decides under its own law, counting foreign credits where appropriate.
• Confirm the tax treatment of each benefit under the relevant income tax treaty. Coordination and taxation are separate questions with separate answers.
• Confirm your health cover. Pension coordination is not health coverage coordination. Medicare does not travel. EU coordination of healthcare for pensioners has its own rules. Budget for private cover until you have written confirmation otherwise.

Why this belongs in a property publication

Because for most people who retire across a border, the pension and the house are the same decision.

The pension determines whether you clear the income threshold on a residence permit. The currency it is paid in determines your real purchasing power in a market you do not earn in. Whether you are paying into one social security system or two determines how much capital you accumulate before you buy at all. And the country you choose to be tax-resident in, a choice that a property purchase often quietly forces, reaches back and changes how the pension is taxed.

Nobody buys a house abroad because of a totalization agreement. But plenty of people discover, at 66, that they cannot afford the one they bought at 55.

Frequently asked questions

What is a totalization agreement?
A bilateral treaty between two countries that coordinates their social security systems. It eliminates dual contributions on the same earnings and allows coverage periods earned in each country to be combined so that a worker can qualify for a benefit they would otherwise be short of.

Does a totalization agreement mean I get two full pensions?
No. Combining coverage periods helps you qualify. Each country then pays a partial, pro-rata benefit reflecting the proportion of your career actually completed under its system. It turns two zeroes into two partial payments, not into two full ones.

How many countries have totalization agreements with the United States?
Thirty are in force. The SSA publishes both the list and a status table showing signature dates, effective dates and pending agreements.

What is a certificate of coverage?
Documentary proof that you are covered by one country's social security system and therefore exempt from the other's. The SSA issues US certificates; within the EU/EEA and Switzerland the equivalent is the A1. Without it, the host country's authorities can and will demand contributions.

Can I choose which country's social security system I pay into?
No. This is the most common misconception about these agreements. Coverage is assigned by objective rules, territoriality, the detached-worker exception, and self-employment rules that vary by agreement. Neither workers nor employers may elect.

How many US work credits do I need for totalization to help?
The SSA can only totalize US and foreign credits if the worker has at least six quarters of US coverage. The foreign system may impose its own minimum before it will count US credits toward its pension.

I am self-employed abroad in a country with no agreement. What happens?
You may owe social security contributions in both countries on the same income. The US Foreign Earned Income Exclusion reduces income tax but not self-employment tax, so it provides no relief here. This is the single worst structural position in the system.

Were WEP and GPO really repealed?
Yes. The Social Security Fairness Act was signed on 5 January 2025 and repealed both the Windfall Elimination Provision and the Government Pension Offset. December 2023 was the last month to which they applied; they do not apply to benefits payable for January 2024 and later. If GPO previously reduced a benefit to zero and you therefore never filed, you may now need to apply.

Does a totalization agreement cover healthcare?
No. US agreements cover retirement, survivors and disability insurance, and Social Security and Medicare taxes, but not Medicare benefits, and not Supplemental Security Income. Some agreements extend to additional host-country programmes, in which case exemption from contributions usually also means exclusion from benefits. Arrange health cover separately.

Related reading

• Will your pension follow you abroad?
• Moving a pension abroad: QROPS, IRA and the alternatives
• Best countries to retire abroad: visa and property
• Cross-border tax filing and what an international accountant costs

Planning to retire across a border?

The pension and the property are usually one decision. JanusHermes brings verified listings and country-level intelligence across 50+ markets into one place. Browse listings on JanusHermes.

This article is general information for an international readership, current as of 9 July 2026. Social security agreements are country-specific, and the coverage rules, particularly for self-employed people, differ materially between agreements. Benefit calculations depend on individual coverage records. Nothing here is legal, tax or financial advice, and no article can substitute for the text of the applicable agreement. Consult the Social Security Administration's International Programs pages, the competent institution in each country where you have worked, and independent cross-border tax advice before making retirement or relocation decisions.

Sources

• U.S. Social Security Administration, International Programs: totalization agreements overview, list and status table, certificate of coverage guidance, and Revenue Procedure 84-54
• Social Security Fairness Act (signed 5 January 2025), repealing the Windfall Elimination Provision and Government Pension Offset
• EU social security coordination: Regulation (EC) 883/2004 and implementing Regulation 987/2009; the A1 certificate
• UK-EU Trade and Cooperation Agreement, Protocol on Social Security Coordination; UK-US bilateral agreement