Some families are tax residents of India, Canada and the United States in the same year: an Indian-born engineer on an H-1B in Aurora with a green card pending, a spouse and children in Mississauga, and parents in Pune. Each country applies its own domestic test, and when two of them claim you, the treaty between those two decides, using residency tie-breaker rules that look alike but are not identical. There is no single three-country treaty, so the answer comes from applying three bilateral treaties one pair at a time.
What are the domestic residency tests in each country?
United States. A citizen is always taxed on worldwide income. A non-citizen is a resident under the green card test (a lawful permanent resident at any time in the year) or the substantial presence test (31 days in the year and 183 days counting the current year, one-third of the prior year and one-sixth of the year before), as set out in IRS Publication 519.
Canada. Residence is factual. CRA Folio S5-F1-C1 says a home, a spouse or common-law partner and dependants in Canada are significant residential ties; secondary ties include personal property, provincial health coverage, a driver's licence, bank accounts and memberships. Separately, a person who spends 183 days or more in Canada in a calendar year is a deemed resident for the whole year.
India. An individual is resident with 182 days or more in India in the year, or 60 days or more plus 365 days in the four preceding years. A citizen who leaves India for employment abroad is tested only on 182 days, and a citizen or person of Indian origin visiting India has the 60 days replaced by 120 days if Indian-source income exceeds Rs 15 lakh. Residents may be "not ordinarily resident". These rules carry over from the Income-tax Act, 1961 to the Income-tax Act, 2025, which applies to tax years beginning April 1, 2026. See the India residency guide, the Canada residency guide and the U.S. residency tests.
How do residency tie-breaker rules work across three treaties?
| Step | U.S.-India (Article 4) | U.S.-Canada (Article IV) | Canada-India (Article 4) |
|---|---|---|---|
| 1 | Permanent home available | Permanent home available | Permanent home available |
| 2 | If homes in both: closer personal and economic relations (centre of vital interests) | Same | Same |
| 3 | If unclear or none: habitual abode | Same | Same |
| 4 | If both or neither: nationality | Citizenship | Nationality |
| 5 | If both or neither nationality: competent authorities by mutual agreement | Same | Same |
| Special rule | Saving clause: U.S. may tax citizens as if no treaty | A U.S. citizen or green card holder is a U.S. resident for the treaty only with a substantial presence, permanent home or habitual abode in the U.S. and closer ties to the U.S. than to any third country | None specific |
The text of each treaty is on the IRS and Canadian government sites listed below. If the tie-breaker names the other country, Canada treats you as a deemed non-resident under its own law (CRA Folio S5-F1-C1), and the U.S. treats you as a nonresident alien in computing U.S. tax while still treating you as a U.S. resident for other purposes (Publication 519).
What facts decide the outcome?
- Permanent home available to you. A home you own or rent on a continuing basis, not a hotel room or occasional stay. Having a home in each country moves you to step 2.
- Centre of vital interests. Family, social ties, occupation, place of business, bank accounts, property and where you manage your affairs. A working spouse and school-age children weigh heavily.
- Habitual abode. Where you actually spend more of your time over a longer period.
- Nationality. An Indian citizen in a U.S.-Canada dispute is not a national of either, so step 4 gives no answer and the governments decide.
Keep a daily location log, leases and mortgage statements, school records, utility bills and a list of where bank accounts, doctors, clubs and employers are. Authorities weigh the whole picture.
How do you claim a treaty tie-breaker?
- Confirm that you are a resident of both countries under each country's domestic law for the same period.
- Walk through the steps for that pair of countries and document each.
- On the U.S. side, file Form 1040-NR with Form 8833 attached if you are a dual-resident taxpayer using the treaty, as explained in Publication 519; the penalty for failing to provide a required Form 8833 is $1,000 per failure.
- In Canada and India, tell your Canadian CPA or Indian Chartered Accountant, who will report your status and, for India, deliver a U.S. tax residency certificate and Form 10F where relevant (see Form 10F and TRC).
- Keep the same facts and dates on all three returns.
What are the risks?
For a U.S. citizen, the saving clause means the tie-breaker will not reduce U.S. tax on worldwide income. For a green card holder, Publication 519 warns that being treated as a nonresident alien under a treaty tie-breaker can trigger the expatriation tax rules, and giving up U.S. residence for treaty purposes can raise immigration questions. Speak to an immigration lawyer before filing. The same discipline applies in Canada: a deemed non-resident status can have departure-tax consequences, so involve your Canadian CPA before you file as a treaty non-resident.
Worked example
Arun is an Indian citizen working in Aurora on an H-1B. He is a U.S. resident under the substantial presence test. His wife and two children live in their owned house in Mississauga, he rents an apartment in Aurora, and he visits Mississauga most weekends. He spent 110 days in India during the year. India: he is not resident (110 days is below 182; the 120-day rule applies only with Indian-source income above Rs 15 lakh). Canada: his spouse and dependants are significant ties, so Canada may see him as a factual resident. The U.S.-Canada tie-breaker then applies. He has a permanent home in both places; his family ties point to Canada and his job points to the U.S., so the centre of vital interests is a close call. If that cannot be determined, habitual abode (where he lives most of the year) is next. The result depends on the facts. All details are hypothetical.
Mistakes to avoid
- Assuming a treaty tie-breaker applies before you have checked that you are resident of both countries.
- Treating the three treaties as one rule set.
- Letting the three returns tell different stories about where you lived.
- Claiming nonresident status as a green card holder without immigration advice.
How we can help
For clients in Aurora and the Fox Valley we map the facts for each country, identify which pair of countries is in conflict, prepare the U.S. position (Form 1040-NR, Form 8833 where relevant), and coordinate with your Canadian CPA and your Indian Chartered Accountant so the three filings agree. See our cross-border tax and relocation and immigration tax planning services. We do not guarantee that a tie-breaker position will be accepted.
Frequently asked questions
Which treaty applies if I am resident in all three countries?
None of them alone. You apply each pair separately, and the facts can lead to different outcomes that your advisers must reconcile. In practice you resolve the strongest conflict first.
Does the U.S.-India treaty tie-breaker apply to U.S. citizens?
For treaty purposes a citizen is a U.S. resident, and the saving clause lets the U.S. tax citizens on worldwide income, so the tie-breaker rarely changes the U.S. result for a citizen.
Is a pending green card application enough to make me a U.S. resident?
No. Residence follows the green card test or the substantial presence test; a pending application is not a green card. Talk to an immigration attorney about status questions.
Do I need a tax residency certificate?
India and Canada may ask for a certificate from the U.S. (Form 6166, requested on Form 8802) to apply treaty rates; see our US India tax treaty guide.
What if the two governments disagree?
Each treaty has a mutual agreement procedure. The U.S.-India treaty requires you to present your case within three years of notice of the action that causes the taxation.
Official sources
- Convention between the United States and India (1989 text)
- Finance Canada: Canada-United States tax convention, consolidated text
- Treaty database of Canada: Canada-India convention (signed 1996)
- CRA Income Tax Folio S5-F1-C1, Determining an Individual's Residence Status
- IRS Publication 519, U.S. Tax Guide for Aliens (2025)
- Income Tax Department of India: Non-resident FAQs
This page summarizes public guidance in plain language. If anything here differs from the official source, the official source controls.
General information only. It is not tax, legal, accounting or immigration advice for your situation, and rules change; confirm the current rules with the official source or a licensed professional in the relevant country.