US-Canada tax treaty
Published on October 23, 2025
by Clark Stott
Clark Stott has been with Expat Tax Online since 2015. Being a dual national based in the UK, Clark has unique experience helping US citizens (and Accidental Americans) become tax compliant via the Streamlined Tax Amnesty program. Clark likes to help Americans in the UK keep their tax situations as simple as possible to avoid harsh IRS treatment.
Table of Contents
The US Canada tax treaty for US expats
The US-Canada tax treaty can seem complicated, but it’s really a framework for fairness. The treaty is designed for individuals and businesses with income ties in both countries. It ensures that income is taxed only once, helping US expats avoid double taxation.
Let’s break down what the treaty covers, who qualifies, and how US expats can use it to simplify their taxes.
What does the US-Canada tax treaty cover?
At its core, the treaty coordinates how the US and Canada tax people who earn income connected to both countries. It prevents double taxation, sets reduced withholding rates, and defines where you’re considered a resident for tax purposes.
Each section of the treaty—called an article—deals with a specific type of income, such as employment (Article XV), pensions (Article XVIII), or capital gains (Article XIII).
Which government agencies oversee and publish it?
Two main agencies maintain the treaty:
- In the US: the Internal Revenue Service (IRS) and the Department of the Treasury
- In Canada: the Department of Finance and the Canada Revenue Agency (CRA)
But before you can claim treaty benefits, you need to understand who qualifies, and that depends on where you’re officially considered a tax resident.
Who qualifies for benefits under the US-Canada tax treaty?
The tie-breaker test works in this order:
- Permanent home: Where do you keep a permanent place to live? If you own or lease a home in only one country, that’s usually your tax residence.
- Center of vital interests: If you have homes in both countries, look at where your personal and economic life is stronger, where your family, job, and community ties are centered.
- Habitual abode: If it’s still unclear, the next step asks: where do you actually spend more time during the year?
- Nationality: If both of the above are balanced, the tie-breaker favors the country of your citizenship.
- Mutual agreement: If none of the above resolves the issue, the IRS and CRA can negotiate directly to settle the question.
The country that wins this test becomes your “treaty residence,” which determines which side gets primary taxing rights.
|
Residency rule (2025) |
US |
Canada |
|
Basis of taxation |
Citizenship-based |
Residency-based |
|
Test |
Green Card or Substantial Presence (based on legal status or time spent in the US) |
Residential ties (based on home, family, and social connections in Canada) |
|
Main tax form |
Form 1040 |
T1 Return |
|
Overseen by |
IRS |
CRA |
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What income types are covered under the US-Canada tax treaty?
The treaty doesn’t apply equally to every type of income. It splits taxing rights depending on where the money comes from and the type of income it represents.
|
Income type |
Who gets to tax it? |
Treaty article |
2025 rule (Summary) |
|
Employment income |
Country where work is performed (unless the employee is in another country) |
Article XV |
Up to US$10,000 is exempt if you stay under 183 days and your employer has no local office |
|
Dividends |
Source country |
Article X |
15% maximum withholding rate (5% for 10% corporate owners) |
|
Interest |
Source country |
Article XI |
Generally 0% withholding (exceptions for contingent interest) |
|
Pensions & Social Security |
Country of residence |
Article XVIII |
Taxed mainly in the country of residence, though domestic law may tax part of the benefits. |
|
Capital gains |
Country where property is located |
Article XIII |
Taxed where the property sits |
|
Business profits |
Country with the permanent establishment |
Article VII |
Taxed where the business is based |
If you’re receiving both US and Canadian income, this table helps you see where the tax burden typically lands.
Common scenarios: How does the US-Canada treaty apply to different expat situations?
The treaty applies differently depending on how you live and work between the two countries.
- Living and working full-time in Canada
You’ll file a US return (Form 1040) and a Canadian T1. The Foreign Tax Credit (Form 1116) usually covers your US tax bill because Canadian taxes are higher. Regardless, you still need to file. - Moving mid-year (part-year resident)
You’ll be treated as a part-year resident in Canada and a full-year taxpayer in the US. The treaty’s tie-breaker rule decides which country has main residency status for that year. - Cross-border commuter
If you live in Canada and work in the US (or vice versa), your wages are taxed where you earn them. The other country usually gives you a foreign tax credit to offset what you already paid. - Dual citizen or long-term Green Card holder
The US “saving clause” means the US can still tax its citizens as if the treaty didn’t exist. However, you can still use the treaty to reduce or credit those taxes.
Once you know which scenario fits you, the next step is to file the correct paperwork to stay compliant.
Which US tax forms should you file under the treaty in 2025?
To use the treaty correctly, match your situation with the proper tax forms. Here’s a quick breakdown:
|
Purpose |
Form |
Filed with |
|
Reporting worldwide income |
Form 1040 |
IRS |
|
Claiming foreign tax credit |
Form 1116 |
IRS |
|
Claiming a treaty-based position |
Form 8833 (not always required) |
IRS |
|
Reporting Canadian income |
T1 General |
CRA |
Tip: Keep documentation of taxes paid in Canada, including receipts, statements, or assessments. The IRS may request proof when you claim foreign tax credits.
How can US expats use the treaty to avoid double taxation?
There are three main tools expats rely on to prevent double taxation:
- Foreign Tax Credit (FTC): Claim dollar-for-dollar credit for taxes paid in Canada.
- Foreign Earned Income Exclusion (FEIE): Exclude up to US$130,000 (for 2025) of earned income if you qualify under the physical presence or bona fide residence test.
- Treaty provisions: Apply reduced withholding or special exemptions (like pension rules).
The treaty doesn’t erase your US filing obligation, but it does ensure you’re not paying twice on the same income.
Still, it’s smart to double-check your calculations. While most expats owe little to nothing after credits, mismatching income sources or misunderstanding residency rules can lead to unnecessary tax or penalties.
FAQs
-
Does the treaty protect me from paying state taxes in the US?
Not always. The treaty applies only to federal income tax. Most US states don’t follow international tax treaties. If you’re still considered a resident of a state like California or New York, you may owe state tax even while living in Canada.
-
Can I use both the Foreign Earned Income Exclusion and the Foreign Tax Credit at the same time?
-
How does the treaty treat rental income from property in Canada?
-
What happens if I receive Canadian government benefits like Employment Insurance or CPP?
-
Do I have to tell the IRS I’m claiming a treaty benefit?
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