Moving to Canada from the US: What Are the Tax Consequences?

Moving from the US to Canada does not end your US tax obligations. US citizens and green card holders file a US return every year regardless of where they live, so the move adds a Canadian filing obligation on top of the existing American one. The planning window matters because several decisions (what to do with retirement accounts, when to arrive, how to structure investments) are far cheaper to get right before the move than to fix after. The tax treaty between the two countries prevents most genuine double taxation, but only if you claim the right credits and make the right elections.

What taxes do I need to think about before moving to Canada from the US?

The pre-move window is the cheapest time to get the structure right, and several items are either impossible or expensive to fix after arrival. Start with your US brokerage and retirement accounts. A Roth IRA, for example, stays tax-free on the US side but is not recognized as tax-exempt by Canada unless you file a one-time treaty election under Article XVIII. That election must be filed with your first Canadian return that covers the period after arrival. If you hold an HSA, contributions made after you become a Canadian resident are no longer deductible on the US side and create a taxable benefit on the Canadian side, so the practical advice is to stop contributing on the move date and draw it down for eligible expenses. The HSA cross-border guide covers the mechanics.

On the investment side, Canadian mutual funds and ETFs listed on the TSX are almost certainly PFICs (Passive Foreign Investment Companies) for US tax purposes. The PFIC regime imposes punitive taxation on gains and certain distributions unless you make a mark-to-market election annually. The cleanest path is to hold US-listed ETFs in your US brokerage after the move and avoid Canadian-listed funds outside the RRSP. The PFIC-safe investment list walks through which vehicles work.

If you own appreciated assets, consider whether realizing gains while still a US-only filer (and before Canadian residency triggers a second layer of tax on the same gain) makes sense. Canada will set your cost base to the fair market value on your arrival date for most property (ITA 128.1(1)(b)), so the pre-move gain is a US-only event, which is often simpler to handle than a gain that spans both jurisdictions.

Do I file a US tax return in the year I move to Canada?

Yes, and you keep filing one every year after that. US citizens owe US federal income tax on worldwide income regardless of residence. The year you move is not a “partial year” for US purposes, because citizenship-based taxation means you were a full-year US taxpayer before the move and you remain one after. Your 1040 covers January 1 through December 31 of the move year, reporting all income from all sources worldwide.

What changes on the US return is the foreign tax credit. Once you start paying Canadian tax on income earned after arrival, you claim a credit on Form 1116 to offset the US tax on that same income. Canadian marginal rates are generally higher than US federal rates at the same income level, so in most cases the credit fully eliminates the US tax on Canadian-source income and you carry the excess forward. The Form 1116 guide covers the category baskets and carryforward mechanics.

You also pick up new information-return obligations. If your Canadian bank accounts, RRSP, TFSA, and brokerage accounts exceed $10,000 in aggregate value at any point during the year, you owe an FBAR (FinCEN Form 114). If your foreign financial assets exceed the higher thresholds for Americans living abroad ($200,000 at year-end for single filers, $400,000 for joint), Form 8938 is also owed. Neither form produces a tax liability on its own, but the penalties for not filing are severe.

When do I become a Canadian tax resident and what triggers it?

Canada taxes residents on worldwide income, and you become a Canadian tax resident when you establish significant residential ties. The CRA looks at the facts under ITA 250(3) and its administrative guidance in Folio S5-F1-C1. The significant ties are a dwelling available to you in Canada, a spouse or common-law partner in Canada, and dependants in Canada. Establishing any one of these, combined with physical presence, is usually enough to make you a Canadian resident from the date of arrival.

For most Americans moving to Canada, the residency start date is the day you arrive with the intention of settling: you sign a lease or close on a home, you enroll your children, you activate provincial health coverage. The Canadian return for the move year covers only the period from your arrival date through December 31 and reports worldwide income for that period.

If your situation is ambiguous (perhaps you arrived mid-year but kept a US home and traveled back frequently), the treaty tiebreaker in Article IV resolves dual residency by looking at permanent home, centre of vital interests, habitual abode, and nationality, in that order. Filing Form NR74 with the CRA asks them to confirm your residency status, though it is not required.

How do I avoid paying taxes to both countries on the same income?

The foreign tax credit is the primary mechanism, and it works on both sides. On your US return, you claim a credit (Form 1116) for Canadian taxes paid on income that both countries tax. On your Canadian return, you claim a credit for US taxes paid. Because you are a resident of both countries for tax purposes (a US citizen living in Canada is a US tax resident by citizenship and a Canadian tax resident by residence), the Canada-US tax treaty assigns primary taxing rights and sets withholding rates to prevent double taxation.

In practice, the credit mechanism works well for employment income, self-employment income, and investment income. Canadian federal and provincial tax rates are generally higher than US federal rates for the same income bracket, so the US foreign tax credit typically wipes out most or all of the US tax on Canadian-source income. The excess credit carries forward for up to ten years.

Where the mechanism requires more attention is on income types with special treaty treatment. Pensions and retirement distributions are covered by Article XVIII of the treaty, which caps the source-country withholding at 15%. Social Security is covered by Article XVIII(5), which makes it taxable only in the country of residence. Capital gains on real property are taxable in the country where the property sits, regardless of your residence. The treaty does not create a credit by itself; you still claim the credit on the return, but the treaty prevents the underlying double taxation by limiting what each country can charge.

The FEIE (Foreign Earned Income Exclusion) is technically available to Americans in Canada, but it is almost never the right choice. Canadian tax rates are high enough that the foreign tax credit produces a better result in nearly every case, and the FEIE cannot be used together with the FTC on the same income.

What should I do with my US retirement accounts before the move?

Leave them where they are, but understand how each account will be treated after you become a Canadian resident. The 401(k) stays in the US and continues to grow tax-deferred. When you eventually take distributions, the treaty caps the US withholding at 15%, and Canada taxes the distribution as income but gives you a credit for the US tax withheld. Transferring a 401(k) to an RRSP is possible under ITA 60(j), but the mechanics are complex and the 30% US withholding on the distribution creates a cash-flow gap.

A traditional IRA works the same way: leave it, let it grow, take distributions later with 15% treaty withholding. A Roth IRA requires a one-time election on your first Canadian return (under Article XVIII(7) of the treaty) to preserve its tax-free status in Canada. Without the election, Canada taxes the annual growth as ordinary income. Make the election in your first year as a Canadian resident and it carries forward indefinitely.

If you hold an employer stock plan (RSUs, ISOs, or an ESPP), the cross-border allocation depends on where the services were performed, not where you live when the shares vest. The RSU double-withholding guide covers the allocation mechanics. Vesting events that straddle the move date are the most complex, so if you can time the move to fall between vesting dates, the filing is simpler.

What Canadian tax traps catch Americans in their first year?

Three specific traps are responsible for most of the first-year compliance cost. The first is the TFSA. Canada treats the Tax-Free Savings Account as exactly what the name says: contributions are not deductible, but growth and withdrawals are tax-free. The IRS does not recognize it at all. The most likely US classification is a foreign trust, which means Forms 3520 and 3520-A, annual reporting of the trust’s income on your US return, and US tax on the growth every year. The compliance cost often exceeds the account’s tax benefit. The practical advice for Americans arriving in Canada is to not open a TFSA, or if your spouse opens one (and your spouse is not a US person), to keep your name off it entirely.

The second trap is Canadian mutual funds. Nearly every Canadian-domiciled mutual fund and many Canadian-listed ETFs qualify as PFICs. The PFIC regime imposes punitive “excess distribution” taxation unless you make a Qualified Electing Fund or mark-to-market election. The safe path is to hold US-listed ETFs (which are not PFICs) in your US brokerage and keep Canadian-listed investments inside the RRSP, where the treaty election shelters the growth from current US taxation.

The third trap is failing to make the RRSP treaty election. The RRSP is the Canadian equivalent of a 401(k), and Canada treats it as tax-deferred. But the IRS does not recognize that deferral by default. Without the election under Article XVIII(7) of the treaty, the IRS would tax the annual growth (interest, dividends, capital gains) inside the RRSP on a current basis, even though you made no withdrawal. The election is a one-time statement attached to your US return, and once made, it carries forward. The RRSP guide for Americans covers the mechanics.

What should I do next?

The planning window before your move is when the most consequential decisions get made, and the cost of getting them right is far lower than fixing them after arrival. If you are an American planning a move to Canada (or you have already arrived and have not yet filed your first dual return), a cross-border tax assessment covers your specific situation, identifies which elections and filings are needed, and lays out a timeline for each one.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.