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Connect on LinkedInA totalization agreement is a Social Security agreement between the U.S. and another country that helps workers avoid paying Social Security taxes to both countries on the same income. It can also allow workers to combine U.S. and foreign work credits to qualify for Social Security benefits.
Why it matters for U.S. expats
Totalization agreements matter for U.S. expats who work abroad, are self-employed abroad, move between countries, or plan to claim Social Security benefits later. The agreement can determine whether you pay into the U.S. system or the foreign country’s system, whether U.S. self-employment tax applies, and whether a Certificate of Coverage is needed.
Common questions
1. How does a totalization agreement work?
A totalization agreement decides which country’s Social Security system covers your work. If the agreement assigns coverage to one country, you can avoid paying Social Security taxes to both countries on the same earnings.
2. Which countries have totalization agreements with the U.S.?
The U.S. has totalization agreements with a limited list of countries, including the UK, Canada, Australia, France, Germany, Italy, Spain, Japan, South Korea, and others. The SSA maintains the official country list.
3. Do totalization agreements apply to self-employed U.S. expats?
Yes. A self-employed U.S. expat may be exempt from U.S. self-employment tax if a totalization agreement assigns coverage to the foreign country’s Social Security system.
4. How do U.S. expats prove they are covered by a totalization agreement?
They use a Certificate of Coverage. This document proves which country’s Social Security system applies and supports an exemption from double Social Security taxation.
5. Does a totalization agreement affect income tax?
No. A totalization agreement deals with Social Security and Medicare taxes, not income tax. Income tax is handled separately through U.S. tax rules, foreign tax rules, and any applicable income tax treaty.
6. Can foreign work credits count toward U.S. Social Security benefits?
Yes. A totalization agreement can allow U.S. and foreign work credits to be combined to help a worker qualify for benefits, but each country calculates and pays its own benefit under its own rules.
7. How do totalization agreements between the U.S. and UK affect Social Security benefits?
The U.S.-UK totalization agreement can help prevent double Social Security contributions while someone is working. It may also allow U.S. and UK credits to be combined for benefit eligibility.
8. What happens if there is no totalization agreement?
If no agreement applies, a U.S. expat may have to pay U.S. self-employment tax and foreign Social Security contributions on the same income.
Related forms
- Schedule SE: Self-Employment Tax
- Form 1040: U.S. Individual Income Tax Return
- Certificate of Coverage
When to get help
Professional guidance is important when:
- You are self-employed abroad and may owe U.S. self-employment tax.
- You work in a country that has a totalization agreement with the U.S.
- You need a Certificate of Coverage.
- You are unsure whether U.S. or foreign Social Security rules apply.
- You have paid into more than one country’s Social Security system.
- You are planning retirement and need to understand cross-border benefit eligibility.
Bright!Tax can help determine whether a totalization agreement applies, coordinate the tax reporting, and identify when a Certificate of Coverage may be needed. Get started with Bright!Tax.
Related Bright!Tax guides
- How Totalization Agreements affect your Social Security as a U.S. expat
- The U.S.-Canada Totalization Agreement: Avoid double Social Security taxes
- Can expats earn U.S. Social Security credits while working abroad?
- How to file taxes for self-employed expats
Official sources
- SSA: U.S. international Social Security agreements
- SSA: Totalization Agreement descriptions
- SSA: Certificate of Coverage
- IRS: Totalization Agreements
Reviewed by
Katelynn Minott, CPA & CEO
Last reviewed
June 2026