Form 1040-NR: When Canadians Need to File a US Non-Resident Return
Most Canadians who are not US citizens, green card holders, or US residents for tax purposes are classified as non-resident aliens (NRAs) by the IRS. When an NRA earns income that is sourced to the United States, the IRS wants to tax it, and Form 1040-NR is the return they file. The rules for what counts as US-source income, how much tax applies, and what the Canada-US treaty can reduce are different from the rules that apply to US residents. Getting this wrong in either direction (filing when you do not need to, or not filing when you do) creates problems on both the US and Canadian side.
Form 1040-NR is the US income tax return for non-resident aliens. Canadians file it when they have US-source income that is not fully exempt under the Canada-US tax treaty and not fully covered by withholding at source. The most common triggers are US rental income (where the NRA elects to file under IRC 871(d) to deduct expenses against the rental), US trade or business income (services performed in the US), and US-source capital gains on real property (FIRPTA). Investment income like dividends and interest is usually handled through withholding at source (15% treaty rate for dividends, 0% for most interest) and does not require a 1040-NR unless the NRA wants a refund of over-withheld amounts. The Canadian FTC for any US tax paid on the 1040-NR is claimed on the Canadian T1 to avoid double taxation.
Who is a non-resident alien?
The IRS classifies anyone who is not a US citizen and does not meet the definition of a US resident alien as a non-resident alien. You are a US resident alien if you hold a green card (IRC 7701(b)(1)(A)(i)) or meet the substantial presence test (a weighted formula counting days of physical presence in the US over three years).
If you are a Canadian who does not hold a green card and does not meet the substantial presence test, you are an NRA. Even if you spend significant time in the US (snowbirding, for example), you remain an NRA as long as the day count stays below the substantial presence threshold or you file the closer connection exception on Form 8840.
Canadian citizens who are also US citizens are not NRAs, regardless of where they live. They file Form 1040, not 1040-NR.
What income triggers a 1040-NR?
NRAs are taxed by the US only on income that is sourced to the United States. The two categories are:
1. Income effectively connected with a US trade or business (ECI). This includes wages earned for services performed in the US, self-employment income from a US trade or business, rental income when the NRA elects to treat it as ECI under IRC 871(d), and income from a US partnership. ECI is taxed at the regular graduated rates (the same brackets that apply to US residents), and the NRA can deduct expenses against it.
2. Fixed, determinable, annual, or periodical (FDAP) income. This includes dividends, interest, royalties, and pension distributions from US sources. FDAP income is taxed at a flat 30% rate (before treaty reductions) and is typically collected through withholding at source. If the withholding matches the treaty rate, no 1040-NR is required for FDAP income alone.
The most common scenarios where Canadians need to file a 1040-NR:
- US rental property. If you own US real estate and collect rent, the default is 30% withholding on gross rent. Most Canadians elect under IRC 871(d) to treat the rental as ECI, which allows deducting mortgage interest, property taxes, insurance, depreciation, and management fees against the rental income. This election requires filing a 1040-NR.
- Services performed in the US. If you work in the US (consulting, speaking, short-term assignments), the compensation is US-source ECI. The treaty’s short-stay exception under Article XV may exempt it if you earned under $10,000 USD or were present for fewer than 183 days and were paid by a non-US employer with no US permanent establishment, but if the exemption does not apply, a 1040-NR is required.
- Sale of US real property. FIRPTA (IRC 1445) treats gain on the sale of US real property interests as ECI, even for NRAs. The buyer withholds 15% of the gross sale price (or 10% on residences under $1M if the buyer will use it as a residence). The NRA files a 1040-NR to report the actual gain (sale price minus basis minus selling costs) and either pays any additional tax or claims a refund of the over-withheld amount.
- US partnership income. If you are a partner in a US partnership, your share of the partnership’s US-source income is ECI, and you file a 1040-NR to report it.
- Over-withheld FDAP income. If a US payer withheld 30% on dividends when the treaty rate is 15%, you file a 1040-NR to claim the 15% refund.
How does the treaty reduce the tax?
The Canada-US tax treaty modifies the default 30% FDAP rate and provides exemptions for certain types of ECI:
| Income type | Default US rate | Treaty rate | Treaty article |
|---|---|---|---|
| Dividends (portfolio) | 30% | 15% | X(2)(b) |
| Dividends (10%+ ownership) | 30% | 5% | X(2)(a) |
| Interest (most types) | 30% | 0% | XI(1) |
| Royalties | 30% | 0-10% | XII |
| Pensions (periodic) | 30% | 15% | XVIII(2)(a) |
| Pensions (lump sum) | 30% | Country of residence only | XVIII(2) |
| Social Security | 30% | 15% max (if over $5,000 CAD) | XVIII(5) |
| Independent services | Graduated | Exempt if no fixed base | XIV/VII |
| Employment income | Graduated | Exempt if under $10,000 or short-stay | XV |
| Real property income | 30% or graduated | No reduction (taxed in situs country) | VI |
| Capital gains on real property | Graduated (FIRPTA) | No reduction | XIII(1) |
To claim treaty-reduced rates on FDAP income, the Canadian provides the US payer with Form W-8BEN (for individuals) or W-8BEN-E (for entities), certifying Canadian residency and claiming the treaty rate. If the payer withholds at 30% despite the W-8BEN, the NRA claims the treaty rate on the 1040-NR and gets the difference refunded.
For ECI treaty exemptions (services income exempt under Article XV, for example), the NRA claims the treaty position on the 1040-NR using Form 8833 (treaty-based return position disclosure).
How is the 1040-NR structured?
The 1040-NR has two income sections:
Schedule NEC (Non-Effectively Connected Income). This is where FDAP income goes: dividends, interest, royalties, pensions. The tax is calculated at the flat rate (30% or the treaty-reduced rate). The withholding already collected on these items is credited against the tax.
Page 1 (Effectively Connected Income). This is where ECI goes: rental income (if the 871(d) election is made), services income, partnership income, FIRPTA gains. The tax is calculated at graduated rates, and deductions are allowed against ECI. Itemized deductions connected to ECI (mortgage interest on a US rental, property taxes, state taxes paid) are deductible.
The 1040-NR does not allow the standard deduction. NRAs who itemize can only deduct expenses connected to US-source ECI. Personal exemptions for NRAs from Canada are available under the treaty (Article XXV), which is one of the few treaty provisions that gives Canadians a benefit not available to NRAs from other countries.
Do I need an ITIN?
If you do not have a Social Security Number, you need an Individual Taxpayer Identification Number (ITIN) to file a 1040-NR. You apply for an ITIN by filing Form W-7 with the IRS, attached to the 1040-NR. The IRS processes the W-7 and 1040-NR together.
For FIRPTA transactions, the buyer may need to apply for an ITIN on the Canadian seller’s behalf using Form W-7, or the Canadian applies directly. The ITIN application can delay the 1040-NR filing if the Canadian does not already have one.
How does the FTC work on the Canadian side?
Any US tax paid on the 1040-NR generates a foreign tax credit on the Canadian T1. Canada taxes its residents on worldwide income, so the US rental income, FIRPTA gain, or services income reported on the 1040-NR is also reported on the Canadian return. The FTC prevents double taxation by crediting the US tax against the Canadian tax on the same income.
The FTC is limited to the Canadian tax otherwise payable on the US-source income. If the US tax exceeds the Canadian tax (unusual for ECI but possible for FIRPTA gains where the US effective rate is higher), the excess US tax is not refundable on the Canadian side. In that case, the Canadian can carry the excess FTC forward or back under ITA 126.
For FDAP income where the US tax was withheld at source (dividends at 15%, for example), the Canadian claims the FTC on the T1 without needing to file a 1040-NR, because the US tax obligation was satisfied by withholding.
What are common mistakes on the 1040-NR?
Filing as a resident when you are an NRA. Some Canadian snowbirds or property owners file Form 1040 instead of 1040-NR, either because they are confused about their status or because a US tax preparer defaults to the resident return. Filing the wrong form can create problems: claiming the standard deduction when you are not entitled to it, reporting worldwide income when only US-source income is taxable, and potentially triggering Subpart F or GILTI inclusions that do not apply to NRAs.
Missing the 871(d) election for rental income. If you do not make the election, the US taxes 30% of gross rent with no deductions. The election must be made by attaching a statement to a timely-filed 1040-NR for the first year. A late election is possible under Rev. Proc. 2003-73, but it requires a reasonable cause statement.
Not filing Form 8833 for treaty positions. If you are claiming a treaty exemption (services income exempt under Article XV, for example), you must disclose the treaty position on Form 8833. Failing to disclose can result in a $1,000 penalty (IRC 6712), and the IRS can deny the treaty benefit for failure to disclose.
Forgetting state taxes. The 1040-NR covers federal tax only. If the US-source income is from a state with an income tax (New York, California, etc.), the NRA may also owe state tax and need to file a state non-resident return. States have their own rules about treaty benefits, and some do not follow the federal treaty rates.
What should I do next?
If you are a Canadian with US-source income, the first question is whether the treaty fully exempts the income. If it does, you may not need a 1040-NR at all (though you may need to file Form 8833 to claim the exemption). If the treaty reduces but does not eliminate the US tax, you file a 1040-NR to report the income at the treaty rate and claim any over-withheld amounts.
- W-8BEN for Canadian freelancers, claiming treaty rates on payments from US clients
- US rental income: 30% or 871(d) election?, the net income election for US rentals
- FIRPTA withholding (Form 8288), what happens when you sell US real property
- How to apply for an ITIN, the ID number you need to file
- Cross-border rental income overview, the full picture for rental income in both countries
- Form 8833: treaty-based return positions, when you must disclose a treaty position
The Cross-Border Assessment is a fixed $250. You get a written, CPA-reviewed analysis of your US filing obligation, the treaty rates that apply, and whether you need a 1040-NR.
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Yarik Yarosh, CPA. "Form 1040-NR: When Canadians Need to File a US Non-Resident Return." Blue Cloud CPA, August 30, 2026. https://bluecloudcpa.com/guides/form-1040-nr-canadian-non-resident-us-filing
This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.