U.S. Social Security for Canadian Residents
Taxed only in Canada, 15 percent exempt, no U.S. withholding, and the U.S. citizen's two returns
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
Under the Canada–U.S. treaty, U.S. Social Security paid to a Canadian resident is taxable only in Canada, and only 85 percent of it is included — 15 percent is exempt. The Social Security Administration withholds nothing once it knows. U.S. citizens in Canada report it on both returns but owe no U.S. tax on it.
On this page
The rules
| Item | Treatment |
|---|---|
| Where taxed | Canada only (Article XVIII(5)) |
| Canadian inclusion | 85 percent of benefits; 15 percent exempt |
| Long-time recipients | Canadian residents receiving U.S. benefits continuously since before January 1, 1996 (and certain surviving spouses or common-law partners) deduct 50 percent, so only half is taxed |
| U.S. withholding | None for a Canadian resident (the SSA's residency records) |
| U.S. citizens in Canada | Exempt from U.S. tax — Article XVIII(5) is an exception to the saving clause; show it on Form 1040 as nontaxable. No Form 8833 is needed: Reg. 301.6114-1(c)(1)(iv) waives disclosure for social security |
| Canadian reporting | Gross amount from Form SSA-1042S or SSA-1099 on line 11500; the exempt 15 (or 50) percent deducted on line 25600 |
Canadian benefits paid to U.S. residents
The reverse: CPP, QPP, and OAS paid to a U.S. resident are taxed only in the United States, as if U.S. Social Security (the OAS guide).
Clawbacks and interactions
U.S. Social Security counts in full toward Canada's OAS recovery tax income, because the line 25600 treaty deduction comes after net income. The Windfall Elimination Provision, which once reduced U.S. benefits for people with Canadian pensions such as CPP, was repealed — along with the Government Pension Offset, which applied only to U.S. government pensions — by the Social Security Fairness Act (P.L. 118-273, signed January 5, 2025), for benefits payable for January 2024 onward (the totalization guide).
Frequently asked questions
Is U.S. Social Security taxable in Canada?
Yes — only in Canada, with 15 percent of it exempt.
Does the U.S. withhold tax from my Social Security if I live in Canada?
No, once the SSA has your Canadian residency on file.
Do U.S. citizens in Canada pay U.S. tax on Social Security?
No — the treaty makes it taxable only in Canada, though it's reported on the U.S. return.
What about CPP received in the U.S.?
Taxed only in the United States, as if U.S. Social Security.
Official sources
Publication 915 explains: “Benefits received by residents of Canada, Egypt, Germany, Ireland, Israel, Italy, Japan, Romania, and the United Kingdom are exempt from U.S. tax.” — Internal Revenue Service, Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits, https://www.irs.gov/publications/p915
Publication 597 explains: “If you are a U.S. citizen or green card holder living in Canada, you still have to file a Form 1040 and report your worldwide income because of the "saving clause" in Article XXIX(2), which allows the United States to tax its citizens and residents as if the treaty had not entered into effect.” — Internal Revenue Service, Publication 597 (10/2015), Information on the United States–Canada Income Tax Treaty, https://www.irs.gov/publications/p597
Next step
Fairlight Accounting is a cross-border accounting and tax practice with a U.S. Tax Desk and a Canadian Tax Desk. Our U.S. Tax Desk and Canadian Tax Desk handle cross-border Social Security and Canadian pension reporting on both returns. See pricing or book a call.
Cross-border taxes, handled in one place
U.S. and Canadian filings prepared together by our U.S. and Canadian Tax Desks.
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