Social Security Totalization Treaties

Social-security totalization agreements solve two problems for internationally-mobile workers: (1) avoiding double social- security contributions when working temporarily abroad (detached-worker provisions, evidenced by a Certificate of Coverage), and (2) aggregating credits across two countries to qualify for benefits in either or both at retirement. This reference covers the bilateral treaty network of the US, UK, Canada, and Australia with major destination countries.

Last reviewed: 2026-05-09. Dates show when each treaty entered into force. Some treaties have been amended or supplemented since first entry. Always verify with the relevant social- security administration before relying on coverage.

Bilateral social-security totalization treaties by partner country, showing US, UK, Canada, and Australia coverage
Partner country	US 🇺🇸	UK 🇬🇧	Canada 🇨🇦	Australia 🇦🇺	Notes
Australia	2002-10-01	1958-04-01 (no longer in force, replaced by reciprocal SS arrangement)	1988-09-01	—	UK-Australia reciprocal social security agreement was terminated in March 2001 by the UK government (UK pensioners in Australia no longer get UK pension indexation). US-Australia totalization remains active. https://www.ssa.gov/international/Agreement_Pamphlets/australia.html
Austria	1991-11-01	1980-11-01	1987-11-01	2002-12-01	Standard totalization. https://www.ssa.gov/international/Agreement_Pamphlets/austria.html
Belgium	1984-07-01	1958-04-01	1987-01-01	2005-07-01	Standard totalization. Combined with EU intra-Member State coordination under Regulation (EC) 883/2004 for EU-EU moves. https://www.ssa.gov/international/Agreement_Pamphlets/belgium.html
Brazil	2018-10-01	None	2014-08-01	None	Significant for Brazilian-Americans. INSS contributions historically substantial; COC provides material benefit. https://www.ssa.gov/international/Agreement_Pamphlets/brazil.html
Canada	1984-08-01	1955-04-01	—	1989-09-01	Standard US-Canada totalization. Quebec has separate agreements covering QPP — typically aligned with federal. https://www.ssa.gov/international/Agreement_Pamphlets/canada.html
Chile	2001-12-01	None	1997-06-01	2004-07-01	Standard totalization. https://www.ssa.gov/international/Agreement_Pamphlets/chile.html
Czech Republic	2009-01-01	None	2003-01-01	None	Newer US agreement (2009). UK and Australia coverage limited. https://www.ssa.gov/international/Agreement_Pamphlets/czech.html
Denmark	2008-10-01	1991-07-01	1986-01-01	2002-09-01	Newer US agreement (2008). Denmark's tax-funded social-security model means COC primarily affects ATP pension contributions rather than general taxation. https://www.ssa.gov/international/Agreement_Pamphlets/denmark.html
Finland	1992-11-01	1984-08-01	1988-02-01	2009-07-01	Standard totalization. https://www.ssa.gov/international/Agreement_Pamphlets/finland.html
France	1988-07-01	1956-07-01	1981-03-01	None	Detached-worker COC valid 5 years extendable. France-Australia totalization not in force; Australians moving to France face standard French social-security charges from arrival. https://www.ssa.gov/international/Agreement_Pamphlets/france.html
Germany	1979-12-01	1961-01-01	1988-04-01	2003-01-01	First US totalization agreement, signed 1976. Detached-worker COC valid up to 5 years; benefit-aggregation prevents loss of either country's credits. https://www.ssa.gov/international/Agreement_Pamphlets/germany.html
Greece	1994-09-01	1956-01-01	1981-12-01	2008-10-01	Heavy use by Greek-American diaspora. https://www.ssa.gov/international/Agreement_Pamphlets/greece.html
Hungary	2016-09-01	None	2003-10-01	None	Newer US agreement (2016). https://www.ssa.gov/international/Agreement_Pamphlets/hungary.html
Iceland	2019-03-01	None	None	None	Newest US agreement (2019). https://www.ssa.gov/international/Agreement_Pamphlets/iceland.html
Ireland	1993-09-01	1971-04-01	1992-01-01	1992-04-01	Heavily used by Irish-American descent claimants returning to Ireland — COC and credit-aggregation both relevant. https://www.ssa.gov/international/Agreement_Pamphlets/ireland.html
Italy	1978-11-01	1962-04-01	1979-01-01	2000-10-01	Detached-worker COC valid 5 years; benefit-aggregation common for Italian-Americans and Italian-Argentinians. https://www.ssa.gov/international/Agreement_Pamphlets/italy.html
Japan	2005-10-01	2001-01-01	2008-03-01	2003-01-01	Standard totalization. Detached-worker COC well-used in Japan-US corporate transfers. https://www.ssa.gov/international/Agreement_Pamphlets/japan.html
Netherlands	1990-11-01	1956-12-01	1990-10-01	2003-04-01	Major US-NL agreement supporting Dutch-employer detached workers in the US and vice versa. https://www.ssa.gov/international/Agreement_Pamphlets/nether.html
Norway	1984-07-01	1957-10-01	1987-01-01	1990-04-01	Standard totalization. Norwegian wealth tax does not interact with totalization rules. https://www.ssa.gov/international/Agreement_Pamphlets/norway.html
Poland	2009-03-01	None	2009-10-01	None	Newer US agreement (2009). Heavy use by Polish-American community. https://www.ssa.gov/international/Agreement_Pamphlets/poland.html
Portugal	1989-08-01	1979-06-01	1981-05-01	2002-10-01	Heavy use by Portuguese-American communities. Detached-worker provisions cover digital-nomad-style US-employer scenarios for first 5 years of Portuguese residence. https://www.ssa.gov/international/Agreement_Pamphlets/portugal.html
Slovak Republic	2014-05-01	None	2003-01-01	None	Newer US agreement (2014). https://www.ssa.gov/international/Agreement_Pamphlets/slovak.html
Slovenia	2019-02-01	None	None	None	Newer US agreement (2019). https://www.ssa.gov/international/Agreement_Pamphlets/slovenia.html
South Korea	2001-04-01	2000-08-01	1999-05-01	2008-10-01	Standard totalization. https://www.ssa.gov/international/Agreement_Pamphlets/korea.html
Spain	1988-04-01	1958-10-01	1988-01-01	1989-04-01	Standard totalization protections. Spanish autonomos / freelancers benefit materially from US COC arrangements via the agreement. https://www.ssa.gov/international/Agreement_Pamphlets/spain.html
Sweden	1987-01-01	1956-01-01	1986-01-01	2004-04-01	Standard totalization. Combined with EU coordination for EU-Sweden moves. https://www.ssa.gov/international/Agreement_Pamphlets/sweden.html
Switzerland	1980-11-01	1969-06-01	1995-10-01	2008-01-01	Swiss AHV/IV and US Social Security totalization. Swiss-resident US persons remain subject to FICA (self-employment) absent COC; employed US persons working for Swiss employer typically AHV-only. https://www.ssa.gov/international/Agreement_Pamphlets/swiss.html
United Kingdom	1985-01-01	—	1998-04-01	1992-01-01	The US-UK totalization agreement is among the oldest and most-used. Both detached-worker (Certificate of Coverage) and benefit-aggregation provisions active. Brexit did not affect bilateral totalization agreements. https://www.ssa.gov/international/Agreement_Pamphlets/uk.html
Uruguay	2018-11-01	None	None	None	Newer US agreement (2018). https://www.ssa.gov/international/Agreement_Pamphlets/uruguay.html

Major destinations without US totalization

The following major destinations have no totalization agreement with the US — Americans working there may face double social-security contributions (FICA in the US + local equivalent) with limited treaty relief:

• United Arab Emirates
• Saudi Arabia
• Qatar
• Kuwait
• Bahrain
• Oman
• Singapore (US — no agreement)
• Hong Kong (US — no agreement)
• Taiwan (US — no agreement)
• Thailand
• Malaysia
• Indonesia
• Vietnam
• Cambodia
• Philippines
• India
• Russia
• China
• Mexico (no US — no agreement)
• Costa Rica
• Panama
• Colombia
• Argentina (no US — no agreement)
• Israel (no US — no agreement)
• Turkey
• Egypt
• Jordan

How totalization actually works

Certificate of Coverage (COC).If you remain on your home-country employer's payroll while temporarily working abroad (typically 5 years for US agreements), the home country issues a COC exempting you from local social-security contributions. The receiving country accepts the COC and does not require local contributions during the COC period.
Detached-worker rule. Standard detached-worker periods are 5 years under US agreements. Extensions beyond 5 years require special application to both agencies and are granted only in exceptional circumstances.
Credit aggregation.If neither country's credits alone meet the eligibility threshold (40 quarters for US Social Security; 35 years for UK State Pension), the treaty allows aggregation — combining credits from both countries to reach the threshold. Benefit is then proportionally paid by each country.
Self-employed. Self-employed workers (Schedule SE in the US) face FICA SE tax of 15.3% (or 12.4% SS portion). Most totalization agreements treat self-employed workers as covered only by the country of residence after 6 months, with the option to elect home- country coverage for shorter periods.
Benefit portability. US Social Security benefits are payable to non-resident US citizens worldwide (with limited exceptions for sanctioned countries). For non-citizens, payment outside the US requires either being in a treaty country, holding a passport from a treaty country, or meeting specific residency-history thresholds.
Windfall Elimination Provision (WEP). US Social Security benefits are reduced for workers also receiving a non-US pension based on work not covered by US Social Security. The repeal of WEP / GPO via the Social Security Fairness Act, signed in January 2025, eliminates this offset for many affected workers — a major change especially for UK pensioners and Canadian-government employees who relocated to the US mid-career.