State Income Tax After Moving to Canada: Do You Still Owe?

Do I still owe California or New York tax after moving to Canada?

You may still owe state income tax if the state continues to treat you as a resident, or if you have income from that state after becoming a nonresident. Leaving the United States or changing your address does not by itself settle either question.

California and New York tax worldwide income during state residence. After residency ends, income from property, work or business in the old state (state-source income) can remain taxable there. Neither state's residency test turns on citizenship: California looks at domicile and whether you are away for a temporary purpose; New York looks at domicile, a permanent place of abode and days spent in the state. California FTB: residents; Publication 1031, section E; IT-201 instructions; IT-203 instructions.

For another state, the same questions apply under its own law: who is a resident, which part-year return to file, what it taxes after you leave, and the refund window. Take the answers from its tax agency; the sections below are examples. A state with no income tax on your income may still tax certain gains through other taxes.

How is domicile different from state tax residence?

Domicile is your permanent home, including the place you intend to return to after an absence. State tax residence is the classification that determines how much of your income the state can tax; domicile is one part of that test.

California requires abandoning the old domicile, physically living in the new place, and actions showing an intention to stay permanently or indefinitely. California can still treat a person domiciled there as a resident during a temporary absence, or treat someone domiciled elsewhere as a resident during a stay that is more than temporary. FTB Publication 1031, sections E and L.

New York domicile continues until you demonstrate both abandonment of New York and establishment of a new domicile. Even after changing domicile, maintaining a permanent place of abode in New York for substantially all of the tax year and spending 184 days or more there can create residence. A year-round home maintained for you may count even if you do not own it; a spouse's home usually counts. Generally, part of a day counts as a day. New York City and Yonkers apply the same tests to their own resident taxes. New York: income tax definitions.

Spending fewer than 184 days in New York does not by itself end your New York domicile; domicile and the home-and-days test are separate.

What proof should I keep if I retain a home or family in the old state?

A home, family, bank account or licence you keep in the old state is a tie the state weighs against your new life in Canada. Keep dated evidence of your new permanent home and each retained connection; a licence change supports that evidence but does not replace it.

New York requires clear and convincing evidence and compares homes, work or business connections, time spent, important personal belongings and close family ties. Voting and licence records are not its primary factors. IT-201 instructions, domicile.

California weighs the strength of connections, not just their number; no single factor decides residency. Its factors include time in and out of California, where your spouse and children live, your principal residence, licence, vehicle and voter registration, and banks. A bank account alone does not settle the question, but a retained home, family and planned return may point to a temporary absence. FTB Publication 1031, sections G and H.

Which return do I file for the year I move?

If state residency ends during the year, use the state's part-year return when filing is required. If residency continues, a Canadian address does not justify filing as a nonresident.

After you leave, a state return is tied to income from that state. California asks a nonresident or part-year resident to file if there is any California-source income and gross or adjusted gross income is above its filing chart, and you can file to recover California tax withheld or estimated tax paid (Publication 1031, section B). New York requires Form IT-203 if you have New York-source income (for a part-year resident, all income from the resident period counts) and your New York adjusted gross income exceeds its standard deduction, or if you want a refund of withheld tax or certain credits (IT-203 instructions).

Each state uses one form for part-year residents and nonresidents. If spouses have different residency, a joint California return uses Form 540NR; in New York the resident spouse files Form IT-201 and the other spouse Form IT-203, unless both choose a joint IT-201, which taxes both as full-year residents. On a joint return both spouses are generally responsible for the tax, interest and penalties; each state offers innocent-spouse relief. California community property rules can also shift income between a resident and a nonresident spouse. Publication 1031, section C; FTB: community property; Form 540NR booklet; New York: definitions; IT-201 instructions.

California includes worldwide income during the resident period and California-source income during the nonresident period. Form 540NR uses full-year income under California law to find an effective tax rate, then applies that rate to California taxable income; deductions and some credits are also prorated. On Schedule CA (540NR), column D shows income as if you were a resident all year and column E the California amount. Canadian wages after departure can affect that rate even when excluded from California-source income. FTB Publication 1100, section B; Publication 1031, section I.

New York first works out the tax as if you were a resident all year, then scales it by the share of your income that it can tax (the income percentage, line 45). For wages and most other income, use the dates you earned or received it and your workday records, not a flat monthly split; wages earned inside and outside New York are allocated on Schedule A of Form IT-203-B. If you or your spouse had living quarters in New York available for your use at any time in the year, used or not, mark Yes at item H and complete Schedule B of that form. Income earned before you left but paid after, including installment gain, is accrued to the resident period unless you give the Tax Department a bond or other security, which defers it to later years (Tax Law section 639). A part-year New York City or Yonkers resident also files Form IT-360.1. IT-203 instructions.

When is the return due if I live in Canada?

Both are due on the usual date; living outside the United States on that date gives more time.

FTB 3519 instructions; Form 540NR booklet; IT-203 instructions.

What can the old state tax after I become a nonresident?

California and New York can continue taxing income connected to property, work or business in the state after residency ends. A Canadian deposit does not change the source.

Sources: FTB: nonresidents; Publication 1031, section I; Publication 1100, section C; IT-203 instructions.

New York can tax work you do from Canada for a New York employer if your assigned or primary office stays in New York; California generally sources wages to where you do the work. A bona fide employer office at your home, work that employer necessity (not convenience) requires outside New York, or an assigned office outside New York can change the result; for a part-year resident the rule covers only the nonresident period. TSB-M-06(5)I. Working across the border covers how Canada sources the same days.

4 U.S.C. 114 protects only an individual who is not a resident or domiciliary of the state, so someone still domiciled in New York under an absence exception (next section) should not assume it applies. Not every bonus or nonqualified deferred payment is covered. FTB Publication 1100, section D; 4 U.S.C. 114; New York: nonresident pension recipients.

Does an employer assignment qualify for an absence safe harbor?

These exceptions matter if you went to Canada on a fixed-term assignment and your old state may still treat you as domiciled there; if your move is permanent, the ordinary tests above apply. An assignment letter alone is insufficient, and New York treats a New York domicile as unchanged by a foreign business assignment unless you show you definitely do not intend to return (IT-201 instructions).

Publication 1031, safe harbor; Form 540NR booklet; New York: Groups A and B; Tax Law section 605(b)(1)(A); IT-201 instructions.

Keep the full assignment and travel history, including family visits. If you do not qualify, the ordinary tests apply: California asks whether your absence is temporary, and in New York a domicile that has not changed keeps you a resident unless Group A or B applies, so you can end up a full-year resident. California-source or New York-source income can still be taxable during a qualifying absence.

Does Canadian residence or the Canada–US treaty stop state tax?

Not by itself. Canadian tax residence does not automatically end state residence, and the treaty's Article II lists US federal income taxes as covered taxes. Do not assume a federal treaty position settles California or New York tax. The treaty's tie-breaker for a person resident in both countries (Article IV, paragraph 2) likewise decides treaty residence, not state residence.

California expressly says treaties limited to federal income taxes do not apply to California; it also allows neither a foreign tax credit nor the federal foreign earned income exclusion. These California rules should not be generalized to every state. Finance Canada: Articles II and IV; Publication 1031, section K.

Can Canada credit state income tax I still pay?

Canada treats a US state as a foreign government, so state income tax can qualify for the foreign tax credit, but only against Canadian tax on income from sources in the United States, and in the year you arrive only on income for the part of the year you were resident in Canada (Income Tax Act, section 126, subsection 126(6)(a) and paragraph 126(1)(b)). The credit is the lesser of the eligible foreign tax and the Canadian tax on that income, unused non-business foreign tax cannot be carried to another year, and Canada generally places employment income where you physically perform the duties (CRA folio S5-F2-C1, paragraphs 1.6, 1.24, 1.57 and 1.74).

So state tax on rent from a home you kept can qualify, but state tax on pay for work you did in Canada, or on income from before you became resident in Canada, generally earns no Canadian credit. If your old state taxes you as a resident on that pay, or New York counts your Canadian workdays under its convenience rule, the same pay can be taxed twice.

New York, unlike California, gives a resident credit on Form IT-112-C for income tax paid to a Canadian province on income sourced to and taxed by that province while you were a New York resident. It does not cover Canadian federal tax, and a dual-residency rule can remove it (IT-112-C instructions).

For Form T2209, the provincial credit (Quebec residents do not use Form T2036; see CRA: line 40500) and the proof the CRA asks for, see Foreign income on a Canadian return and CRA foreign tax credit review.

What if the state disputes my move or I filed as a full-year resident?

A return error may call for an amendment; a disputed assessment calls for the response procedure on the notice. The income allocation depends on the residency date the evidence supports.

Publication 1031, section C; Form 540NR booklet; IT-203 instructions; FTB: if you did not file; FTB: Notice of Proposed Assessment; FTB: disagree with an assessment; Tax Law section 681; New York: amend a filed return.

To claim a refund by amending, California generally allows four years from the original due date (four years from the filing date if the return was filed in the extension period) or one year from the overpayment, whichever is later; New York allows three years from filing or two years from payment, whichever is later. These windows do not replace a notice's response deadline.

Example

Illustrative only; all amounts are US dollars, and no tax is calculated.

An individual permanently moves from New York to Ontario on July 1. Assume the evidence supports ending New York residence on that date, the home-and-days test does not create continued residence, and no special accrual or New York adjustment applies. The individual receives US$60,000 of wages before the move, US$40,000 afterward for work at an assigned Canadian employer office, and US$10,000 of net rental income after the move from a retained New York property, calculated under New York rules.

Subject to filing requirements, Form IT-203 includes the US$60,000 resident-period wages and the US$10,000 New York rent: US$70,000 of New York-source income against US$110,000 of full-year income. The income percentage on line 45 is 70,000 ÷ 110,000 = 0.6364, so New York applies about 64% of the tax computed on all US$110,000 as if resident, not roughly half. The US$40,000 Canadian-office wages are not New York-source but stay in the US$110,000 base.

A Canadian credit reaches only Canadian tax on US-source income from the part of the year the individual is resident in Canada: New York tax on the rent can qualify (a separate calculation), but tax on the pre-move wages cannot. If the assigned office instead remains in New York, the US$40,000 needs reassessment under the employer-convenience rule, and New York tax on it generally earns no matching Canadian credit. IT-203 instructions; TSB-M-06(5)I; Income Tax Act, section 126; CRA folio, paragraph 1.57.

Different for you?

Retained ties, income and unresolved notices change the next step.

• Your old state is not California or New York: take the answers from its tax agency, then bring your move timeline, retained ties and income from the state to a cross-border tax review.
• You need the federal and Canadian move-year filings, or are a US citizen or green card holder: see Moving from the US to Canada or Americans living in Canada.
• You kept a US rental, are selling US property, work remotely for an old-state employer, or are paid stock awards: see US rental property, Selling US real estate, Working across the border or Stock awards and pay after a move.
• You kept an RRSP, TFSA, US brokerage account, 401(k) or IRA: see State tax on RRSPs and TFSAs, Keeping a US brokerage account after moving or US retirement accounts in Canada.
• You retained a home or spouse, have an employer assignment or ongoing business, or received a state notice: residency and sourcing can affect both countries' tax, and notice deadlines limit your response; bring the timeline, contracts, travel records and returns for cross-border tax review.