For people and businesses with ties to both countries, last checked October 31, 2026
The US-Canada Tax Treaty in Plain English
The treaty decides which country taxes what when you have income or residence on both sides of the border. Here are the articles people actually use, in plain words, each linked to the treaty text or the IRS.
Quick answer
What does the US-Canada tax treaty do?
It prevents double taxation and sets limits on each country's tax: who counts as resident when both countries claim you, which country taxes wages, pensions and Social Security, and the maximum US withholding on dividends, interest and pensions paid to Canadian residents (treaty text, IRS Publication 597). One rule surprises Americans: the saving clause lets the US tax its citizens as if the treaty did not exist, apart from listed exceptions, so US citizens in Canada still file US returns and rely on foreign tax credits.
At a glance
- Residency
- A tie-breaker decides residence for someone resident in both countries: permanent home, then centre of vital interests, habitual abode, citizenship
- US citizens
- Still taxed by the US on worldwide income under the saving clause, with credits for Canadian tax
- Social Security / CPP
- Taxed only in the country where you live
- US withholding for Canadian residents
- Interest 0%, dividends 15% (5% for qualifying companies), periodic pensions 15%
- Source
- Treaty text, IRS Treaty Table 1, checked October 31, 2026
The articles people use most
| Article | What it says, in plain words | Source |
|---|---|---|
| IV Residence | If both countries treat you as resident, you are resident where you have a permanent home; if in both or neither, where your personal and economic relations are closer; then where you have a habitual abode; then your citizenship; otherwise the tax authorities agree | Article IV(2) |
| XV Employment | Wages for work done in the other country are taxed only at home if they are not more than US$10,000 (in that country's currency) for the year, or if you are there no more than 183 days in any 12-month period and the pay is not paid by a resident employer or borne by a permanent establishment there | Publication 597 |
| XVIII Pensions | Includes IRAs, RRSPs and RRIFs. Source-country tax on periodic pension payments is capped at 15% (not lump sums). A resident can elect to defer tax on income inside the other country's retirement plan (automatic for eligible US persons with RRSPs and RRIFs) | Article XVIII, Publication 597 |
| XVIII(5) Social Security | Taxed only where you live. US Social Security paid to a Canadian resident is taxed in Canada like CPP with 15% exempt; CPP, QPP and OAS paid to a US resident are taxed in the US like US Social Security | Article XVIII(5), Publication 915 |
| X, XI Dividends, interest | US withholding for Canadian residents: interest 0%, dividends 15%, or 5% for a company owning at least 10% of the voting stock | IRS Treaty Table 1 |
| XIII Gains | Real property can be taxed where it is located; most other gains only where the seller lives. An election can align the two countries when one taxes a deemed sale, for example on leaving Canada | Article XIII |
| XXIV Double taxation | Each country credits the other's tax, with special rules for US citizens living in Canada | Article XXIV |
| XXIX Saving clause | The US can tax its citizens (and Canada its residents) as if there were no treaty, except for listed articles such as pensions, Social Security, double-tax relief and non-discrimination | Article XXIX(2)-(3) |
Claiming a treaty position
A treaty-based return position is generally disclosed on Form 8833, one form per position, with a US$1,000 penalty for an individual who fails to disclose (Form 8833). A dual resident who uses the tie-breaker to be treated as resident in Canada files as a nonresident alien for US purposes, which can have consequences for green card holders. Some treaty benefits, such as the additional foreign tax credit for US citizens in Canada, do not need Form 8833. See Form 1116 for Americans in Canada.
When to get help
The treaty interacts with each country's own rules, and the saving clause changes the result for US citizens. A licensed CPA in both countries can apply it to your facts.
- You may be resident in both countries in the same year
- You work across the border or have pensions or Social Security from both countries
- You are a US citizen in Canada with US investment income
- You want to claim a treaty position on a return
Common questions
Do US citizens in Canada still file US tax returns?
Yes. Under the saving clause the US taxes its citizens as if the treaty did not exist, except for listed articles. Canadian tax is credited against US tax.
Who taxes my US Social Security if I live in Canada?
Canada only. It is taxed in Canada like CPP, with 15% of the benefit exempt, and the IRS says US citizens resident in Canada are exempt from US tax on it.
Who taxes CPP and OAS if I live in the US?
The US only, as if they were US Social Security benefits.
What is the US withholding rate on dividends for Canadian residents?
15% under the treaty, or 5% for a company owning at least 10% of the voting stock. Interest is generally 0%.
What is the treaty tie-breaker?
For someone resident in both countries: permanent home, then centre of vital interests, then habitual abode, then citizenship, and finally agreement between the tax authorities.
Do I need Form 8833 to claim the treaty?
Generally yes for a treaty-based return position, with a US$1,000 penalty for individuals who fail to disclose, but some benefits are excepted.
Sources
Every rule and figure on this page links to the IRS, CRA or other official source it comes from. Amounts change; we re-check them before each engagement.
- IRS: Canada-US income tax treaty and protocols
- Department of Finance Canada: Canada-US Convention (consolidated)
- IRS: Publication 597, Information on the US-Canada Income Tax Treaty
- IRS: Tax Treaty Table 1
- IRS: Publication 915 (2025), Social Security benefits
- IRS: Form 8833 (Rev. December 2022)
Gurleen Kaur, CPA licensed in British Columbia and Washington State. Last updated October 31, 2026. This page is general information, not tax or legal advice for your situation.
Related guides: Form 1116 for Americans in Canada, Form 8840, RRSP and Roth IRA, W-8BEN for Canadians.
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