Americans Moving to Canada

A Cross-Border Tax Guide for U.S. Citizens and Green Card Holders

Executive Summary

Moving from the United States to Canada starts a new Canadian tax-residency analysis while most U.S. tax obligations keep running in the background. A U.S. citizen generally continues filing U.S. federal returns on worldwide income after becoming a Canadian resident, and a green card holder generally remains a U.S. tax resident until that status is properly ended.

Canada generally taxes residents on worldwide income from the date Canadian residency begins. The move year therefore is not a single filing event — it requires coordinating a Canadian arrival return, a continuing U.S. return, foreign tax credits, investment accounts, retirement plans, business interests, and real estate across two tax systems at once.

A common mistake is treating this as primarily an immigration project with tax as an afterthought. Roth IRAs, U.S. brokerage accounts, LLC or S corporation interests, U.S. rental property, and the departing U.S. state each carry their own planning window that narrows once Canadian residency begins.

At a Glanc

•  Who is moving — a U.S. citizen, a green card holder, or a dual-status individual — since U.S. filing consequences differ.
•  When Canadian tax residency begins, based on the complete residential-ties facts.
•  What property is owned at that date, since Canada generally resets its cost base to fair market value on arrival.
•  Which U.S. retirement, brokerage, and business accounts exist, and how each is treated under the Canada-U.S. Tax Treaty.
•  Whether U.S. real estate, an LLC, or an S corporation will be kept, sold, or restructured after the move.

The answer to one question often affects several others. Keeping a Roth IRA, for example, has different consequences from keeping a U.S. rental property or a U.S. operating business.

Why This Decision Matters

A move to Canada is frequently planned around a job offer, a family decision, or a lifestyle change, with tax treated as paperwork to sort out afterward. That ordering causes problems because several of the most consequential elections and structuring decisions are only available, or only cheaply available, before Canadian residency begins.

For U.S. federal tax purposes, citizenship generally continues to govern the filing obligation regardless of where the individual lives. For Canadian tax purposes, residency generally governs the filing obligation regardless of citizenship. A U.S. citizen who becomes a Canadian resident is therefore subject to both systems at once, and the Canada-U.S. Tax Treaty exists specifically to coordinate, not eliminate, that overlap.

Canadian Domestic Law vs. the Canada-U.S. Tax Treaty

A move should generally be analyzed in two stages, since a domestic filing obligation and the treaty’s coordination rules answer different questions.

Planning point: Establish the Canadian residency start date and the continuing U.S. filing position before preparing the Canadian arrival-year return or claiming a foreign tax credit.

U.S. Filing Continues for Citizens and Green Card Holders

U.S. citizenship-based taxation generally continues after a U.S. citizen becomes a Canadian resident. The individual generally keeps filing a U.S. federal return and reporting worldwide income, subject to U.S. rules, regardless of how long the move lasts.

A green card holder generally remains a U.S. tax resident until that status ends under U.S. tax rules, not simply by living in Canada. A long-term resident, defined as a green card holder for at least eight of the last fifteen tax years, who formally gives up the card may become a covered expatriate and face the section 877A exit tax if net worth is $2 million or more, average annual U.S. tax liability exceeds the indexed threshold, or five years of U.S. tax compliance cannot be certified.

Important: Do not treat giving up a green card as a simple filing decision. Immigration status, treaty residency, and the expatriation-tax rules require coordinated review before the card is surrendered.

Canada’s Arrival-Basis Rules

When an individual becomes a Canadian resident, Canada generally deems most capital property owned at that time to have been disposed of and immediately reacquired at fair market value. This establishes a new Canadian tax cost base for future Canadian gain or loss calculations; it does not change the individual’s U.S. basis in the same property.

The rule does not apply identically to every type of property, and shares of private corporations require careful fair-market-value documentation. The practical effect is favourable: Canada generally does not tax gains that accrued before the individual became a Canadian resident.

Recordkeeping: Obtain and retain arrival-date fair market values for investments and other relevant property. Years later, these records may be essential when an investment or property is finally sold.

Retirement Accounts: Roth IRAs, Traditional IRAs, and 401(k)s

Traditional IRAs and 401(k) plans generally continue on a tax-deferred basis for Canadian purposes under Article XVIII of the Canada-U.S. Tax Treaty, without an annual election. These accounts cannot be transferred directly into a Canadian RRSP, and required minimum distribution and U.S. withholding rules should be reviewed separately from the Canadian analysis.

A Roth IRA is different. Without a treaty election, the CRA’s stated position taxes income accruing inside a Roth IRA annually in Canada. A Canadian resident who owns a Roth IRA should file a one-time election under Article XVIII(7) with the Competent Authority of Canada, generally by the filing deadline for the first affected Canadian return, to preserve tax-deferred treatment. A contribution made to the account after becoming a Canadian resident, other than certain qualifying rollovers, can split the account and strip treaty protection from the post-move portion.

U.S. Social Security and other U.S. pension income are addressed separately under the treaty, and CPP, OAS, and U.S. Social Security coordination involves a distinct social-security agreement rather than the income-tax rules alone.

Pre-move priority: Identify every Roth IRA, document its contribution history, and review the treaty election before or shortly after Canadian residency begins — and before making any post-move contribution.

U.S. Brokerage Accounts and Investment Holdings

A Canadian resident generally reports worldwide investment income in Canada, including income from a continuing U.S. brokerage account. Canadian reporting requires Canadian-dollar calculations, which can produce a different gain or loss than the same transaction shows in U.S. dollars, so currency and cost-base records should be tracked from the Canadian residency start date.

The reverse risk is easy to overlook: because a U.S. citizen or green card holder remains a U.S. taxpayer after the move, buying Canadian mutual funds or Canadian-listed exchange-traded funds can trigger the U.S. passive foreign investment company rules, potential Form 8621 reporting, and unfavourable U.S. tax outcomes. Holding U.S.-domiciled funds in a taxable account, rather than Canadian funds, is a common way to avoid this mismatch.

Canadian Registered Accounts: RRSPs and TFSAs

A newcomer who becomes eligible to open an RRSP should know that the account is specifically exempted from U.S. Form 3520 and Form 3520-A foreign trust reporting, with its growth generally tax-deferred for U.S. purposes as well as Canadian purposes.

A TFSA does not carry the same relief. Its Canadian tax-free status is not recognized under U.S. tax law, and its growth is generally taxable on a U.S. return. Whether a TFSA also requires foreign trust information reporting is a fact-specific and unsettled question that should be reviewed before the account is opened or funded rather than assumed either way.

Cross-Border Reporting and Compliance

A move that looks administratively simple can generate several parallel filings. Depending on citizenship, structure, and facts, compliance may include the following.

U.S. Business Interests: LLCs and S Corporations

A U.S. LLC can create a significant Canada-U.S. classification mismatch. An LLC is generally treated as fiscally transparent for U.S. tax purposes unless it elects otherwise, while Canada may classify it differently for Canadian income-tax purposes, which can complicate income recognition, distributions, foreign tax credits, and treaty access.

When Keeping the Structure As-Is May Still Work

•  The LLC or S corporation has no employees or operations that will move to Canada with the owner.
•  Distributions can be structured and timed to manage the Canadian and U.S. mismatch.
•  The owner is willing to maintain parallel U.S. and Canadian tax filings indefinitely.

When Restructuring Before the Move Deserves Review

•  The owner will actively manage the business from Canada after relocating.
•  Retained earnings, growth plans, or an eventual sale make the entity-mismatch cost material over time.
•  The business could instead operate through a structure with cleaner treaty and foreign tax credit treatment.

The treaty contains a special provision under which the competent authorities may agree to an alternative treatment for an S corporation shareholder in appropriate circumstances, but its availability and suitability require case-specific review, not an assumption that it will apply.

U.S. Real Estate After the Move

A Canadian resident who keeps U.S. rental property generally continues reporting the rental activity in the United States and also reports the same worldwide rental income in Canada once Canadian residency begins. The two countries calculate rental deductions differently, so U.S. depreciation and Canadian capital cost allowance should be maintained on separate schedules, with foreign tax credits used to coordinate the results.

A retained U.S. home raises a related but separate question. The U.S. principal-residence exclusion depends on ownership and use tests measured before a sale, while Canada’s arrival-basis rule separately resets the Canadian cost base to fair market value on the Canadian residency start date. A later sale can therefore require two gain calculations on two different cost bases, and FIRPTA withholding rules should be reviewed if the seller is treated as foreign for a future U.S. real-property transaction.

Ending State Residency

Moving to Canada does not automatically settle residency with the former U.S. state. State domicile and residency rules vary widely, and some states, including California, New York, and Virginia, examine continuing connections such as a home, a driver’s licence, voter registration, business activity, and family ties before accepting that residency has ended.

The move should be documented and the departure state’s specific residency requirements addressed directly, since state tax treatment of retirement income and treaty positions can differ from the federal result.

Common Mistakes

•  Assuming U.S. federal filing ends when a U.S. citizen moves to Canada.
•  Assuming a green card stops creating U.S. tax residency merely because the holder lives in Canada.
•  Failing to document fair market values of investments on the Canadian residency start date.
•  Making a post-move contribution to a Roth IRA without reviewing the treaty consequences first.
•  Buying Canadian mutual funds or Canadian ETFs without reviewing U.S. PFIC exposure.
•  Assuming a U.S. LLC or S corporation receives the same tax treatment in Canada that it received in the United States.
•  Using U.S.-dollar brokerage gains directly on the Canadian return without Canadian-dollar calculations.
•  Missing Form T1135 in the years after the newcomer year.
•  Failing to add new Canadian financial accounts to FBAR and Form 8938 analysis.
•  Continuing ties to the former U.S. state without reviewing that state’s residency rules.

Tax Square Insight

Do not determine the tax result of a move to Canada simply by asking whether a green card was surrendered or a T1 return was filed. Review the complete picture — citizenship and immigration status, Canadian residency-start facts, retirement and brokerage accounts, business interests, and real estate — together, and revisit that review whenever a major account, entity, or property changes hands.

Action Checklist

Before and shortly after moving from the United States to Canada, consider the following:

☐  Determine the expected Canadian tax-residency start date.

☐  Confirm whether U.S. citizenship or green card status will continue U.S. tax residency.

☐  Review any potential treaty-residency position under Article IV.

☐  Record fair market values and tax basis for investments and other property at arrival.

☐  Review the Roth IRA treaty-election requirement before making any post-move contribution.

☐  Review IRAs, 401(k)s, and other retirement arrangements before transfers or distributions.

☐  Review U.S. brokerage holdings, and avoid Canadian mutual funds and ETFs, without a PFIC review.

☐  Plan for Form T1135 after the first Canadian-resident tax year, where applicable.

☐  Continue FBAR and Form 8938 analysis for Canadian accounts if U.S. person status continues.

☐  Review U.S. LLC, S corporation, and other business interests before Canadian residency begins.

☐  Coordinate U.S. rental-property reporting, Canadian CCA, and foreign tax credits.

☐  Review U.S. home-sale planning against Canada’s arrival-basis rule.

☐  Document the termination of residency or domicile in the former U.S. state.

☐  Coordinate the Canadian arrival-year return with the continuing U.S. federal and state returns.

Frequently Asked Questions

Does a U.S. citizen stop filing U.S. tax returns after moving to Canada?

Generally, no. U.S. citizens generally remain subject to U.S. federal income-tax filing on worldwide income while living in Canada.

When does Canada start taxing my worldwide income?

Generally from the date Canadian tax residency begins, which depends on the facts and residential ties rather than a chosen date.

Does Canada reset the tax cost of my investments when I move?

For many properties, yes. Canada’s arrival rules generally establish a fair-market-value Canadian tax cost on the residency start date, with exceptions that require separate review.

Do I need to close my Roth IRA before moving?

Not generally. The treaty election and contribution rules should be reviewed, and any post-move Canadian contribution requires particular care.

Should a U.S. citizen open a TFSA after moving to Canada?

The Canadian benefit should be weighed against continuing U.S. income-tax and reporting consequences before contributing.

Do I file Form T1135 in my first year in Canada?

Generally not for the first tax year of Canadian residency. The requirement should be tested again in later years.

Do FBAR and Form 8938 stop after I move to Canada?

Not for a U.S. citizen merely because of the move. Canadian accounts may become reportable foreign financial accounts or assets under the applicable U.S. rules.

What happens to my U.S. LLC after I move?

Canadian and U.S. entity classification may differ, which can affect income recognition and foreign tax credits. The structure should be reviewed before Canadian residency begins.

Official References

•  Canada Revenue Agency Guidance — Provides Canadian rules on determining residency status, arrival-year reporting, and Form T1135 requirements for newcomers.
•  Canada-U.S. Tax Treaty — Addresses residency tie-breaker rules, retirement-plan treatment under Article XVIII, and relief from double taxation.
•  Income Tax Act (Canada), including section 128.1 — Governs the Canadian tax treatment of worldwide income and the deemed acquisition of property on becoming a Canadian resident.
•  Internal Revenue Code and IRS Guidance — Provides U.S. federal rules on citizenship-based taxation, the section 877A expatriation tax, PFIC classification, and related filing obligations.
•  Internal Revenue Service / FinCEN FBAR and FATCA Guidance — Governs FBAR and Form 8938 reporting for foreign financial accounts and assets held by U.S. persons.

Disclaimer

This article is intended for general educational and informational purposes only and does not constitute tax, legal, accounting, investment, or immigration advice. Cross-border tax outcomes depend on the taxpayer’s citizenship, immigration status, residency facts, asset ownership, business structures, destination province, former U.S. state, treaty eligibility, and the law in effect at the relevant time. Professional advice should be obtained before implementing a move, changing immigration status, or restructuring assets.