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Topic · US expat tax

US Social Security & Self-Employment Tax Abroad (Totalization, WEP Repeal)

How totalization agreements prevent double social tax, what a certificate of coverage does, the self-employment tax rate, and what the 2025 repeal of the Windfall Elimination Provision means for benefits.

By Danilson Ramos · Founder, Atamatax

Published June 2026 · Updated October 2026

Reviewed and approved by our EA/CPA team on .

U.S. Social Security abroad has two sides: what you pay in while working overseas, and what you get out in benefits later. Both can surprise expats — especially the self-employed, who face the full self-employment (SE) tax, currently around 15.3% on net self-employment earnings, which the FEIE does not reduce.

Totalization agreements: avoiding double social tax

A totalization agreement is a U.S. social-security agreement with another country, designed to stop you paying into two social-security systems on the same earnings and to coordinate benefit eligibility. The U.S. has these with a number of countries. Where one exists, it generally assigns your coverage to one country for a given period. (This is the same mechanism covered on the totalization-agreements topic.)

Totalization agreements cover social-security / SE tax, not income tax. A country can have an income-tax treaty but no totalization agreement — so it's worth checking specifically whether a totalization agreement exists for your country.

Self-employed: who covers you, and the certificate

For the self-employed, the agreement generally points coverage to one system, proven to the IRS with a certificate of coverage:

SituationOften covered byEffect on U.S. SE tax
Self-employed in an agreement countryCountry of residenceMay be exempt from U.S. SE tax with a certificate of coverage
Temporarily 'detached' / posted abroadHome country, for a limited periodStays in the home system during the posting
Working where there's no agreementPotentially both systemsU.S. SE tax (~15.3%) can apply with no offset for local social tax
Where an agreement assigns you to the other country's system, you generally obtain a certificate of coverage from that country's social-security authority and keep it to support excluding the earnings from U.S. SE tax.

Benefits: the Windfall Elimination Provision (WEP) has been repealed

On the benefit side, the Windfall Elimination Provision (WEP) used to reduce U.S. Social Security benefits for people who also received a pension from work not covered by U.S. Social Security — which could include a foreign pension — and the Government Pension Offset (GPO) reduced spouse's and surviving-spouse's benefits. The Social Security Fairness Act, signed on January 5, 2025, ended both. The Social Security Administration treats December 2023 as the last month WEP and GPO apply, so neither reduces benefits payable for January 2024 and later; the old rules still govern months before that. Older articles and some benefit estimates still describe the reduction as current.

  • The FEIE does not reduce SE tax; relief usually comes from a totalization agreement.
  • A certificate of coverage is the practical proof of which system covers you.
  • WEP and GPO no longer reduce benefits payable for January 2024 onward — a foreign pension no longer lowers the U.S. benefit through WEP.

Are US Social Security benefits taxed while you live abroad?

Usually, yes. A U.S. citizen's Social Security benefits go on Form 1040 under the ordinary rules wherever the citizen lives, and the Social Security Administration does not withhold U.S. tax from a citizen's benefits — so the tax, if any, is settled on the return. IRS Publication 915 names the exception: U.S. citizens who are residents of one of eight countries are exempt from U.S. tax on their benefits under that country's income tax treaty.

You are a U.S. citizen resident inU.S. tax on your U.S. Social SecurityCondition
CanadaExemptCanada taxes the benefit instead (treaty Article XVIII(5))
Germany, Ireland, Israel, the United KingdomExemptResidence in that country
Egypt, RomaniaExemptResidence in that country
ItalyExempt only if you are also an Italian citizenItalian citizenship and residence
Anywhere elseTaxable under the ordinary Form 1040 rulesA foreign tax on the same benefit may be creditable on Form 1116
The exemption follows residence, not where the money is paid: it applies while you are a resident of the treaty country and stops when you move. It is also a U.S.-side rule only — the country you live in may tax the benefit under its own law and the treaty.

Self-employed abroad and unsure what you owe or can claim?

The free Tax Risk Check helps you think through totalization, SE-tax exposure, and benefit questions. Atamatax provides preparation support; this is not individualized tax or legal advice.

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Authorities cited

  • IRC §1401 — IRC §1401 — Rate of self-employment tax
  • IRC §911 — IRC §911 — Foreign earned income exclusion + housing exclusion/deduction
  • SSA: Social Security Fairness Act — Social Security Administration — Social Security Fairness Act: WEP and GPO end for benefits payable for January 2024 and later
  • IRS Pub. 915 — IRS Publication 915 — Social Security and Equivalent Railroad Retirement Benefits
  • US–Canada Income Tax Treaty — Convention between the United States and Canada (signed 1980), as amended by its five Protocols

Primary sources (Cornell Legal Information Institute for the US Code and CFR; IRS.gov for forms, procedures, and treaty documents). This page is general information, not individualized tax or legal advice.

Atamatax provides tax preparation support and educational resources. This website does not constitute legal or tax advice.

Frequently asked questions

Does the FEIE remove my US self-employment tax?#
No — the Foreign Earned Income Exclusion reduces U.S. income tax on earned income but not self-employment (Social Security/Medicare) tax, which is currently around 15.3%. Relief from U.S. SE tax usually comes from a totalization agreement, not the FEIE.
What is a certificate of coverage?#
It's a document from a country's social-security authority showing which system covers you under a totalization agreement. Where the agreement assigns you to the other country, you generally keep the certificate to support excluding those earnings from U.S. SE tax.
Will the WEP reduce my US Social Security benefits?#
Not for benefits payable for January 2024 or later. The Social Security Fairness Act, signed on January 5, 2025, ended the Windfall Elimination Provision and the Government Pension Offset; the Social Security Administration treats December 2023 as the last month either applies, and a beneficiary due more receives a one-time payment covering the increase back to January 2024. A foreign pension therefore no longer reduces a U.S. benefit through WEP. Months before January 2024 are still governed by the old rules.
Is US Social Security taxable in Canada?#
Yes — in Canada, not in the United States. IRS Publication 915 lists Canada among the countries whose U.S.-citizen residents are exempt from U.S. tax on their Social Security benefits, and the US–Canada treaty (Article XVIII(5)) gives Canada the right to tax them instead. The benefit is reported on the Canadian return; on the U.S. side the treaty exemption applies for as long as you are resident in Canada.
Do I pay US tax on Social Security if I live abroad?#
Usually yes. A U.S. citizen's benefits stay under the ordinary Form 1040 rules wherever the citizen lives, and the Social Security Administration does not withhold U.S. tax from a citizen's benefits. The exception, per IRS Publication 915: U.S. citizens resident in Canada, Egypt, Germany, Ireland, Israel, Italy (if also an Italian citizen), Romania or the United Kingdom are exempt from U.S. tax on those benefits.
How is a foreign sole proprietorship reported by a US person?#
A local independent registration — auto-entrepreneur, Einzelunternehmen, ditta individuale, sole trader — is generally not a separate entity for US purposes, so the business income goes on Schedule C of your own return and the net earnings run through the self-employment tax computation described above. Two things routinely catch people out. First, the FEIE does not touch self-employment tax, so excluding the income does not remove the charge — only a totalization agreement assigning coverage to the other country does. Second, a foreign branch or business operation can bring Form 8858 into play, an information return with a penalty attached that has nothing to do with how much tax is due. Atamatax computes Schedule C and the self-employment tax; Form 8858 is routed to a professional for preparation.

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