Taking a training post or a staff position in the United States is a big move, and the tax questions can feel more stressful than the clinical ones. A lot of the worry comes from a single, common mix-up: the belief that your passport decides where you pay tax. For Canadian income tax, it usually doesn't. What matters is your tax residency, not your citizenship, and those are two very different things.
The other big fear is being taxed twice on the same dollar. In most cases, that outcome is avoidable. Canada and the United States have a long-standing tax treaty, and a system of foreign tax credits exists to stop the same income from being taxed in full on both sides of the border. This article is general education for Canadian-trained physicians heading south — it is not tax advice, and your own situation may need a professional review.
Residency vs citizenship: what actually decides your taxes
Your citizenship and your tax residency status are separate ideas. You can be a Canadian citizen who is no longer a resident of Canada for tax purposes, and you can be a resident of the United States for tax purposes without ever holding a green card. Sorting out which country considers you a resident is the first step, because residency is what drives most of your filing obligations.
How Canada decides if you are still a tax resident
Canada looks at your residential ties, not just the number of days you spend in the country. The strongest ties are a home available to you in Canada, and a spouse, common-law partner, or dependants who stay behind. Secondary ties matter too — things like a Canadian driver's licence, provincial health coverage, bank accounts, memberships, and personal property.
If you keep a home in Canada while your family remains there, you may still be a Canadian tax resident even while you work abroad. If you sever those ties when you leave, you generally become a non-resident. Because residency is judged on the full picture, two physicians with the same job offer can land in different positions.
Why U.S. citizenship or a green card changes the picture
The United States is unusual: it taxes its citizens and green-card holders on their worldwide income, no matter where they actually live. So a green card does more than let you work — it can pull your Canadian income into the U.S. tax system too.
Most Canadian physicians arrive on a training or work visa rather than a green card. In that case, the United States generally taxes you as either a resident or a non-resident, depending largely on how much time you spend in the country during the year. Knowing which category applies to you shapes what you file and on which income.
Will you be taxed twice? How the Canada–U.S. tax treaty works
This is the question that keeps people up at night, and the reassuring part is that the system is built to prevent double taxation. The Canada–U.S. tax treaty sets rules for which country gets to tax certain types of income, and it provides tie-breaker tests when both countries could reasonably call you a resident.
Foreign tax credits and how the treaty prevents double taxation
The main tool is the foreign tax credit. In simple terms, when you pay tax to one country on a slice of income, the other country generally lets you credit that amount against what you would otherwise owe on the same income. The goal is that the same dollar is not taxed in full twice.
This does not always mean your total tax bill is zero on that income, and it does not mean the two systems cancel out perfectly. Rates, timing, and the type of income all affect the result. The treaty reduces double taxation — it does not remove the need to file carefully in both places.
The departure tax: what happens when you become a non-resident
When you stop being a Canadian tax resident, Canada applies what is often called the departure tax. It isn't a separate tax. Instead, Canada generally treats you as having sold certain property at its fair market value on the day you leave — a "deemed disposition" — even though you have not actually sold anything.
That deemed sale can trigger a capital gain, and tax on that gain, in your year of departure. The idea is that Canada collects tax on the growth that happened while you were a resident, before you move outside its system.
You report the deemed disposition on your departure-year return, using Form T1243 to calculate any gain. If everything you owned when you left was worth more than $25,000 in total, you also file Form T1161 listing it. The tax is normally due with that return. But you can elect on Form T1244, by April 30 of the year after you leave, to defer paying it until you actually sell the property, without interest. If the deferred federal tax is more than $16,500, the CRA requires you to post security to cover it.
Which assets are affected — and which are exempt
Not everything is caught by the deemed disposition rule. Some common assets are excluded, which matters a great deal for planning:
Canadian real property: real estate located in Canada, such as a home or rental property, is generally not subject to the deemed disposition on departure.
Registered plans and pensions: accounts such as a Registered Retirement Savings Plan (RRSP) or a TFSA, and pension plans, are generally excluded from the deemed disposition.
Canadian business property: property, including inventory, used in a business you carry on through a permanent establishment in Canada.
Short-term residents' property: if you lived in Canada for 60 months or less in the 10 years before leaving, property you owned when you last became a resident is generally excluded.
Most other property is caught. For physicians, that often includes a non-registered investment account (stocks, exchange-traded funds, and mutual funds), shares of a professional corporation, real estate outside Canada, and cryptocurrency. Because the categories are technical and the value is measured on a specific date, this is an area where a small misunderstanding can become an expensive one.
Your TFSA and RRSP once you leave Canada
Two accounts deserve special attention, because they behave very differently once you cross the border: the Tax-Free Savings Account (TFSA) and the RRSP. The word "tax-free" and the word "registered" do not travel the way many people assume.
Why contributing to a TFSA while non-resident can be penalized
A TFSA is tax-free in Canada, but that shelter is a Canadian concept. For U.S. tax purposes, a TFSA generally loses its tax-free advantage, and the growth inside it can be taxable to the United States. That alone surprises many new arrivals.
There is also a Canadian catch. If you contribute to a TFSA while you are a non-resident of Canada, those contributions generally attract a penalty tax of 1% per month for each month the non-resident contribution stays in the account. In practice, many people stop contributing to a TFSA once they become non-residents, even if they leave the existing account in place.
What happens to your RRSP as a non-resident
An RRSP is generally more portable. You can usually keep your RRSP after you become a non-resident, and you are not forced to collapse it when you leave. The Canada–U.S. tax treaty also allows the growth inside an RRSP to keep deferring U.S. tax while the money stays in the plan, which lines up with how the account works in Canada.
Contributing is a different matter. RRSP room depends on Canadian earned income and your available contribution limit, so if your income is now U.S.-source, your ability to make new contributions may shrink or stop. Keeping the account is one decision; funding it is another.
Filing obligations on both sides of the border
Moving does not switch off your Canadian filing overnight, and starting work in the United States adds a second set of returns. For the year in which you move, expect to file in both countries. If you stay a Canadian tax resident, you'll generally file in both every year.
Canadian filing after you leave
The year you leave Canada, you generally file a departure return — sometimes called a final or part-year return — for that tax year. It reports your income up to the date you left, notes the date you became a non-resident, and is where the deemed disposition is handled. After that year, you may still have Canadian filing obligations if you continue to earn certain types of Canadian-source income.
U.S. filing while you work there
Working in the United States generally means filing a U.S. federal return. Depending on the state where you live and work, you may also have a state return, and state rules do not always follow the federal treatment. Which U.S. forms apply depends on whether you count as a resident or non-resident there for the year, which loops back to how much time you spend in the country.
Fellows, residents, and IMGs: two situations to watch
Two groups face wrinkles worth flagging early. The first is residents and fellows on training visas. A training post can feel temporary, and many trainees keep strong Canadian ties and intend to return. That intention can affect your residency analysis, and it means the "am I still a resident?" question is rarely obvious for trainees.
The second is international medical graduates (IMGs) who hold Canadian assets — a TFSA, an RRSP, a home, or an investment account — while building a career across the border. The mix of Canadian accounts and U.S. tax rules is exactly where TFSA growth, departure-tax timing, and treaty positions collide. If you hold Canadian assets and work in the United States, assume your situation is more complex than a colleague who owns nothing in Canada.
When to bring in a cross-border accountant
General guidance can help you understand the moving parts, but it cannot replace advice built around your own facts. Cross-border physician situations are genuinely complex, the two systems interact in ways that are easy to get wrong, and the mistakes are often penalized rather than simply corrected.
It is generally worth speaking with a qualified cross-border accountant or tax professional before you move, not after. A pre-departure conversation can help you understand your residency position, plan around the departure tax, and decide what to do with a TFSA and an RRSP while you still have every option open.
