Certificate of Coverage

A Certificate of Coverage is an official document showing which country’s Social Security system covers a worker under a totalization agreement. For U.S. expats, it can prove that wages or self-employment income are exempt from Social Security taxes in the other country.

Why it matters for U.S. expats

A Certificate of Coverage can prevent double Social Security taxation. Without one, an expat or employer may struggle to prove that income is covered by only one country’s system. This matters most for self-employed expats, employees sent abroad, and workers in countries that have a totalization agreement with the United States.

Common questions

1. When do U.S. expats need a Certificate of Coverage?

U.S. expats need one when a totalization agreement assigns their work to one country’s Social Security system and they need proof of exemption from the other country’s Social Security taxes.

2. Who issues a U.S. Certificate of Coverage?

The U.S. Social Security Administration issues U.S. Certificates of Coverage through its Office of International Programs.

3. Who requests a Certificate of Coverage for an employee abroad?

For employees sent abroad, the employer usually requests the certificate from the country whose Social Security system covers the work.

4. Who requests a Certificate of Coverage for a self-employed expat?

Self-employed workers request their own certificate from the appropriate country’s Social Security authority.

5. Does a Certificate of Coverage reduce U.S. income tax?

No. It applies to Social Security coverage and Social Security taxes, not federal income tax.

6. Does a tax treaty replace a Certificate of Coverage?

No. Tax treaties deal with income tax. Totalization agreements deal with Social Security taxes and coverage.

7. What happens if there is no totalization agreement?

If no totalization agreement applies, a self-employed U.S. expat may owe U.S. self-employment tax and may also owe foreign social security contributions under local law.

8. Do self-employed expats attach a Certificate of Coverage to their U.S. tax return?

Yes, when claiming exemption from U.S. self-employment tax based on foreign Social Security coverage, self-employed workers should attach the certificate to their U.S. tax return.

9. Can a Certificate of Coverage help avoid double contributions?

Yes. It proves that the worker is covered by one country’s Social Security system and exempt from the other country’s contributions for the covered work.

Related forms

• Schedule SE: Self-Employment Tax
• Form 1040: U.S. Individual Income Tax Return

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 with a U.S. totalization agreement.
• You are paying Social Security contributions in two countries.
• Your employer sent you abroad and needs proof of coverage.
• You need to attach a foreign Certificate of Coverage to your U.S. return.
• You are unsure whether a tax treaty or totalization agreement applies.

Bright!Tax can help determine whether a totalization agreement applies, how your Social Security taxes should be handled, and what documentation belongs with your U.S. return. Get started with Bright!Tax.

Related Bright!Tax guides

• How totalization agreements affect Social Security for U.S. expats
• Self-employment tax deductions for U.S. expats
• Social Security for self-employed Americans living abroad
• Can expats earn U.S. Social Security credits while working abroad?
• Schedule C for expat freelancers and small business owners

Official sources

• SSA: Certificate of Coverage
• SSA: U.S. International Social Security Agreements
• SSA: Totalization Agreements
• IRS: Self-employment tax for businesses abroad
• IRS: Totalization Agreements

Reviewed by

Katelynn Minott, CPA & CEO

Last reviewed

June 2026