US-Canada Treaty Tie-Breaker: Article IV, Form 8833, What Changes

How does the US-Canada treaty tie-breaker rule decide which country I'm resident in?

The tie-breaker in Article IV(2) of the Canada–US treaty applies its tests in order, and the first one that points to a single country decides. It applies only when each country already treats you as resident under its own law.

Which country the treaty points to follows from facts, and the tax authorities can test it. Canada's deeming rule then applies on its own; the US treats you as a nonresident only if you claim the treaty position on your return, and you can instead keep filing Form 1040 as a US resident (26 CFR 301.7701(b)-7(a)(1)). Cases turn hard when you have a home in both countries, a spouse or children in the other country, a green card, US citizenship, or a move partway through the year.

Gather before you rely on the tie-breaker:

• Leases, deeds and proof of who could use each home, and when
• Where your spouse and children lived, and the children's schools
• Employment contracts and where you actually worked
• A day count for each country
• Bank, investment and property records, and where you manage them
• Your immigration status in the US and any green card dates

When does the tie-breaker apply, and when don't I need it?

The tie-breaker is needed only if you are a dual resident: resident in the US under US law and resident in Canada under Canadian law in the same period (Publication 519). If either country already treats you as a non-resident under its own rules, there is nothing to break.

You may not need it when:

• You are not a US resident under the green card test or the substantial presence test. Days do not count for an exempt individual (for example a qualifying J-1 student, teacher or trainee, and their J-2 family) or for a regular commuter from Canada, meaning one who commutes on more than 75% of workdays (Publication 519).
• You spend fewer than 183 days in the US and may qualify for the closer-connection exception instead; see snowbirds and US residency.
• You have cut your Canadian residential ties, so Canada already treats you as a non-resident; see Canadian tax residency.

Under Article IV(1), a US citizen or green card holder counts as a US resident for treaty purposes, so one who is also resident in Canada is a dual resident (treaty; for green card holders, CRA Folio S5-F1-C1, ¶1.44).

Dual resident Canada US: which test decides for my facts?

The permanent home test often fails to decide, because many dual residents keep a place in both countries. The CRA says a permanent home can be any dwelling kept for permanent, not occasional, use, including a rented furnished room; ownership and size do not matter (Folio S5-F1-C1, ¶1.46–1.48). The table shows which test usually carries the weight; it does not settle anyone's case.

Does a spouse in Canada make me a Canadian resident?

Not by itself under the treaty. Under Canadian law, a spouse and dependants in Canada are significant residential ties, which is why Canada may keep treating the worker as resident. Under the treaty, family is one part of the centre of vital interests, weighed against work and economic ties (Folio ¶1.50). Canada puts the onus on you to show you are liable to tax in the other country as its resident (¶1.43).

The US treats me as a nonresident on a J-1 or J-2 visa: does that make me a Canadian resident?

No. Being a US nonresident does not make you a Canadian resident; it only means you are not a dual resident, so the tie-breaker does not apply. Whether you are a Canadian resident is decided by Canadian rules alone: your residential ties, such as a home, a spouse or dependants in Canada. If those ties remain, Canada can tax you as a resident on worldwide income; if they are cut, you can be a resident of neither country. See Canadian tax residency.

An exempt J-1 student, teacher or trainee, and immediate family whose visas derive from theirs, do not count US days while the exemption lasts. The exemption has time limits, so a later year can make you a US resident (Publication 519); check each year.

I'm a US citizen living in Canada: can the tie-breaker stop the IRS from taxing me?

No. The tie-breaker cannot take a US citizen out of US tax: the treaty's saving clause, Article XXIX(2), says the treaty does not affect US taxation of its citizens, apart from listed exceptions such as the double-tax relief article (treaty). The US regulation that lets a dual resident file as a nonresident applies only to aliens (26 CFR 301.7701(b)-7(a)(1)). A US citizen files Form 1040 on worldwide income every year.

Relief from double tax comes through credits under Article XXIV, not the tie-breaker; see Americans living in Canada.

The tie-breaker still works for Canadian tax: if it pointed to the US, Canada would treat that citizen as a deemed non-resident, and the US would tax the citizen either way.

I hold a green card and live in Canada: what happens if I claim to be a Canadian resident under the treaty?

Claiming Canadian treaty residence can end your US residence for tax. A lawful permanent resident stops being treated as one for tax once treated as a treaty-country resident, if the person does not waive the treaty benefits and notifies the IRS (26 USC 7701(b)(6)). The notice is the Form 1040-NR with Form 8833 that the regulation requires (Form 8854 instructions; 26 CFR 301.7701(b)-7(b), (c)).

If you held the green card in at least 8 of the last 15 tax years, you are a long-term resident; a year in which you were already a treaty resident of another country, without waiving the treaty, does not count (Form 8854 instructions). Form 8833 warns that a long-term resident who claims foreign treaty residence is deemed to have expatriated under section 877A (Form 8833); Form 8854 is attached to that year's return. The exit-tax tests then decide whether tax is due; see exit tax.

The regulation also warns that filing Form 1040-NR may affect whether immigration authorities consider you to have kept your permanent residence (26 CFR 301.7701(b)-7(b)). Until you claim treaty residence, the green card keeps you a US resident: you file Form 1040 on worldwide income and credit Canadian tax. If you have missed years, get cross-border tax help before filing them.

Form 8833 dual resident: what goes on it, when is it due, and what if I leave it out?

A dual resident who claims treaty residence in Canada files Form 1040-NR with Form 8833 attached and computes US tax as a nonresident alien (Publication 519; Form 8833 instructions).

When it is due: with the 1040-NR, by its due date, April 15 if you had wages subject to US withholding, otherwise June 15, or by the extended date if you get an extension (26 CFR 301.7701(b)-7(b)). A new form is needed every year you take the position.

If you leave it out: the penalty is US$1,000 for each failure, which the IRS may waive for reasonable cause and good faith (26 USC 6712). Separately, the regulation requires the form to be attached to the 1040-NR (26 CFR 301.7701(b)-7(b), (c)).

If you are married: a joint US return needs both spouses to be US citizens or residents all year, or an election that treats both as residents and bars either from claiming treaty non-residence (Publication 519). Weigh that before you claim treaty residence.

Filing as a treaty nonresident changes only how your US income tax is computed, including withholding on US income paid to you. You remain a US resident for other Code purposes, and your residency time periods do not change (26 CFR 301.7701(b)-7(a)(1), (3)). For what the claim does not change for FBAR and Form 8938, see snowbirds and US residency.

If the treaty makes me a US resident, what happens on the Canadian side?

Canada deems you a non-resident. Under Income Tax Act s. 250(5), a person resident in Canada under Canadian law but resident only in the other country under a treaty is deemed not resident in Canada. The CRA says this applies for all purposes of the Act, and the rules for leaving Canada apply from that date, including a deemed sale of certain property and non-resident withholding on some Canadian income (Folio ¶1.38).

That can happen even though your home, spouse or bank accounts stay in Canada. If the treaty does point to the US, a departure return can be required for that year, and Canadian income is taxed as a non-resident's afterwards; see leaving Canada. On the US side, you file Form 1040 as a resident.

If the treaty points to Canada instead, you file a Canadian T1 on worldwide income and claim a credit for US tax; see foreign income on a Canadian return.

What happens in the year my treaty residence changes partway through?

Both countries apply the tie-breaker to the period when you were a dual resident, not to the whole year. The US regulation treats you as a nonresident only for the part of the year you were a dual resident claiming treaty residence elsewhere, so after a mid-year change one US return can treat part of the year as nonresident and the rest as resident; your US residency dates do not change (26 CFR 301.7701(b)-7(a)(1)). Canada's deeming rule works "at a time", so Canadian non-residence starts on the day the treaty begins pointing to the US (s. 250(5)).

Fix the change date from facts you can prove: a lease start, the family's move, a job start. For the US arrival-year return, see first year as a US tax resident; for a move the other way, see moving from the US to Canada.

Treaty nonresident position rejected by the IRS or the CRA: what now?

A rejected tie-breaker position is not final: answer the notice by its deadline with your evidence, and protect your appeal rights while asking the two tax authorities to agree.

• Competent authority: Article XXVI lets you present the case to the competent authority (the office each country names to settle treaty disputes) of the country where you are resident, regardless of domestic remedies. The CRA says to approach the authority of the country where you assert residency (IC71-17R6, ¶11). An agreement is carried out despite domestic time limits only if the other country is notified within six years from the end of the tax year (treaty).
• US request: the IRS accepts a residency request only when it is needed to avoid double tax or decide a treaty benefit and needs consultation with Canada; it will not resolve residency on its own (Rev. Proc. 2015-40, section 3.06(1)).
• Canadian objection: the CRA lets you file a notice of objection, due by the later of 90 days after the notice of assessment and 1 year after the filing deadline (Income Tax Act s. 165(1)), and ask Appeals to hold it while competent authority works (IC71-17R6, ¶46–48).

If the CRA says you never stopped being resident, see left Canada without telling the CRA; for an IRS letter, see answering an IRS letter.

Example

These examples are illustrative; figures are in US dollars unless stated.

A job in Seattle, family in Vancouver

Year 1: Raj works in Seattle on an H-1B for US$150,000 and rents an apartment there on a one-year lease. His wife and children stay in the family house in Vancouver. He meets substantial presence, and Canada keeps him resident through his family ties. He has a permanent home in both countries, so the centre of vital interests comes next: his family counts toward Canada, his job toward the US. He documents both. If he concludes Canada, he files Form 1040-NR with Form 8833, pays US tax on his Seattle wages, and reports worldwide income on his T1 with a credit for the US tax.

Year 2: his family moves to Seattle on July 1 and the Vancouver house is sold. From that date, his home and his family are in the US. If Canada treats him as non-resident from that date, because his ties are cut or because the treaty now points to the US, the departure rules apply on that date. If he keeps claiming Canada for the first half, his US return treats that part as nonresident and the rest as resident.

A green card holder moves back to Toronto

Emma, a Canadian, has held a green card for nine years, never claiming treaty residence, and moves back to Toronto, keeping the card. If she files Form 1040-NR with Form 8833 claiming Canadian treaty residence and does not waive treaty benefits, she stops being treated as a US resident from the date her treaty residence begins and, as a long-term resident, expatriates on that date under section 877A; she attaches Form 8854 to that year's return. The exit-tax tests then decide whether any exit tax is due. Filing Form 1040 as a US resident instead keeps her in the US system with credit for Canadian tax.

A dual citizen in Windsor

Mark is a US and Canadian citizen who lives in Windsor and earns US$90,000 working in Detroit. As a US citizen he cannot use the tie-breaker to leave the US system: he files Form 1040 on worldwide income. Canada taxes him as its resident on his T1 and gives credit for the US tax on his Detroit wages.

Different for you?

• You are not sure Canada treats you as resident at all: start with Canadian tax residency.
• You work in the US on a TN visa: see Canadians on a TN visa.
• You spend winters in the US: see snowbirds and US residency.
• You live in Canada and commute to a US job: see working across the border.
• The treaty points to the US and you are leaving Canada: see leaving Canada.
• You hold a green card, or your spouse lives in the other country: a treaty claim can end US residence or rule out a joint US return; get cross-border tax help and read exit tax.
• Your treaty residence changed mid-year: see first year as a US tax resident and get cross-border tax help.
• You moved to a US state: states may not follow the treaty; see state tax on RRSPs and TFSAs.
• The IRS or CRA rejected your position: see left Canada without telling the CRA and get cross-border tax help.