Do I file in both Canada and Australia?
Usually yes, at least for the transition year. Emigrants face the Canadian departure computation and an Australian arrival position in the same twelve months; returning Canadians face the reverse, with superannuation as the recurring complication.
Which return do you prepare first?
Whichever one the credit depends on. Preparing them in the wrong order is the most common reason a credit is claimed in the wrong place, and it is also the most common reason a client ends up paying twice and reclaiming later.
Does the treaty mean I only file once?
No. A treaty allocates the tax; it does not consolidate the filing. Both obligations survive, and in some cases the treaty position itself has to be disclosed on a return before it can be relied on.
What about sub-national tax — states and provinces?
They set their own residency and sourcing rules and are not bound by the federal treaty in the same way. A position that is protected federally can still produce a state or provincial return, which is the single most common surprise in this corridor.
Can you work with my adviser in the other country?
That is how most corridor engagements run. They keep their side, we take ours and the interaction between the two, and the scope boundary is agreed in writing so nothing is duplicated or dropped.
What if I am behind in one country and current in the other?
That is the usual pattern. We map the unfiled years first and check which catch-up routes are open before anything is filed, because the route chosen for one year affects the relief available for the rest.
Australia's tax year ends mid-year — how does that fit my Canadian return?
It does not fit neatly, and that mismatch is the whole administrative problem in this corridor. Your Canadian return covers a calendar year; the Australian year ends in the middle of it, so any twelve months of Canadian income sits across two Australian years, and the reverse is equally true. Nothing is wrong with that, but income and the tax paid on it have to be apportioned to the right period on each side before a credit claim can be built. We work from payslips and statements by date rather than from year-end summaries, because a summary produced on one country's calendar cannot answer the other country's question.
Do I still have to file in Canada after moving to Australia?
Usually yes, at least for the year you left. Canadian residence ends on a date, not on the day the aeroplane takes off, and the departure-year return has to set out that date, report your worldwide income up to it, and deal with the deemed disposition of the assets the rules reach. After that date Canada taxes you only on the Canadian sources that remain, such as a rental property or certain pension receipts, and the filing changes shape accordingly. What matters most is that the date used in Canada is the same date your Australian arrival position is built on.
What happens to my super if I move back to Canada?
Superannuation is the recurring complication on the return leg. It is an Australian retirement arrangement built for Australian rules, and Canada has to characterise it before it can decide how growth inside it and payments out of it are treated here. That characterisation is a documentary exercise: the governing rules of the fund, what the member is entitled to, what can be drawn and on what conditions. Get it wrong and either income is reported that should not be, or nothing is reported for years and the position becomes harder to correct. Settle the characterisation first, then file consistently with it every year.
I kept my house in Canada after emigrating — does that matter?
It matters twice. First, a retained home is one of the facts the residence analysis weighs, so it can affect the date your Canadian residence is treated as ending, and if it is occupied by family rather than let at arm's length it weighs more heavily still. Second, once you are non-resident and the property is let, Canada taxes that rent under a separate regime with its own filing and remittance mechanics, while Australia will want the same rent reported on its own calendar. Decide the residence question before the rental arrangements are put in place, rather than afterwards.
Which date do I use as my departure date for tax purposes?
One date, used consistently in both countries. It is a question of fact rather than choice: when residential ties to Canada were severed and ties to Australia established. Flight dates, the end of a lease or the sale of a home, where the family went and when, the closing or retention of accounts and memberships all feed into it. The reason this cannot be approximated is that the Canadian departure computation and the Australian arrival position both hang off it. If the two filings use different dates, a period of income is either taxed twice or reported in neither place.
I'm on a working holiday visa — do I file in both countries?
Often yes, and the visa itself does not settle it. What settles it is whether your Canadian residence continued while you were away, and what your Australian position was over the same months. A short working stay with a home, family and accounts left in Canada usually leaves you Canadian resident throughout, reporting the Australian earnings in Canada and claiming credit for the Australian tax on them. A longer stay that quietly turns into a move is a different filing altogether. The safe order is to decide residence first and file second, rather than assuming a temporary visa means a temporary tax position.
What counts as foreign income, and what is a foreign tax?
Foreign income is income sourced outside the country you are filing in — where the work was done, where the property sits, where the payer is resident, depending on the type. A foreign tax, for credit purposes, is a levy imposed by another country that functions as an income tax and that you were legally required to pay. Consumption taxes, property taxes and most social contributions are not, however real the cost. Sourcing is decided by rule, not by which bank received it. See the foreign tax credit.
How do I actually stop being taxed twice?
In this order. Fix your residence under each country's own rules, and if both claim you, apply the treaty tie-breaker. Identify where each type of income is sourced. Read the article that covers that income type, because it decides who taxes and at what maximum rate. Then claim the relief on the residence-country return, with proof of the foreign tax. Most of the tax people lose to double taxation is lost at the last step, not the first. See how double taxation is relieved.
