Do I have to file in both Canada and Australia the year I move?
Usually, yes. A treaty decides which country taxes a given slice of income; it does not merge the two returns. In the year of a move you are ordinarily a part-year resident of one country and a part-year resident of the other, so each return covers its own period and its own income. The complication in this corridor is that the two tax years do not align, because the Australian year ends mid-year. One Canadian year therefore straddles two Australian ones. That is an accounting problem rather than a legal one, but it has to be solved before either return is prepared, because the same salary has to be split the same way on both sides.
How do I line up the Australian tax year with my Canadian return?
By splitting the underlying income by period rather than by document. Australian payment summaries and Canadian slips cover different windows, so neither can be copied straight onto the other country's return. The working method is to rebuild employment income, interest and any business income month by month from payslips and statements, then draw the two tax years across that schedule. Each return is then prepared from the same underlying split, which means the figures reconcile if either revenue authority asks how they were derived. Keep the workings. The reconciliation, not the slip, is what supports a foreign tax credit claim when the years do not match.
Do I still file a Canadian return after I emigrate to Australia?
Often, and for two separate reasons. The year you leave needs a return that closes your Canadian residence and carries the departure computation, because Canada treats a departing resident as having disposed of much of what they own on the way out. That has to be measured and reported whether or not tax falls due. After that year, a return may still be required for Canadian-source income: rent from a property you kept, Canadian employment income, or amounts paid out of registered plans. Those are taxed on a non-resident basis, which usually means withholding at source, sometimes with the option to file instead and be taxed on the net amount. Whether that option is worth taking is arithmetic, not preference.
Does my Australian superannuation have to be reported on my Canadian return?
It has to be characterised before that can be answered, and this is the recurring complication for Canadians coming back. Canada looks at what the arrangement actually is, not what it is called: whether it is an employer pension, an account held for your benefit, or something closer to a foreign trust. The answer drives three things. Whether growth inside the fund is taxable in Canada as it accrues or only when money is paid out, whether the balance falls inside Canada's foreign property reporting, and how a withdrawal is treated when it is eventually made. Get the characterisation on paper in the first year back. Reversing it later means amending every return in between.
I have moved back to Canada from Australia — what do I file here?
A part-year Canadian return for the year of arrival, reporting world income from the date residence resumed and Canadian-source income for the rest of the year. On the Australian side you have the mirror image of an emigrant's position, and because the Australian year ends mid-year your final Australian period and your first Canadian period overlap rather than abut. Two items usually need attention in the first year. The cost base of assets you brought with you, which Canada generally takes at their value on arrival, and the superannuation question. Both are easier to settle before the first return is filed than after.
Which return should be prepared first when I file in both countries?
The one that produces the figures the other one needs. If the credit is claimed in Canada, the Australian liability has to be known first, so the Australian position is settled and then carried into the Canadian return. If the credit runs the other way, the order reverses. Where the year-ends do not align, neither country's assessment may be final in time, so the second return is often filed on a supportable figure and adjusted when the first is assessed. That is a normal sequence rather than an error, provided the adjustment is actually made and the workings behind the original claim were kept.
What is a totalization agreement and how do I use one?
A social security agreement that stops you contributing to two systems for the same work, and lets periods in both count towards benefit eligibility in either. Which system you stay in depends on the agreement's rules for your situation — a seconded employee usually remains in the home system for a set period, a locally hired one usually joins the host system. You evidence it with a certificate of coverage obtained before or shortly after the assignment starts. See certificates of coverage.
Which countries have a tax treaty with the United States?
Around sixty, including Canada, the United Kingdom, India, Australia and most of western Europe — but the list matters less than the terms, because each treaty caps rates and allocates income differently. Two countries with treaties can produce opposite answers on the same pension or the same royalty. What decides your position is the specific article covering your income type. See our country guides.
