Because periodic amounts paid out of Canada to someone living elsewhere are taxed by withholding on the gross amount, deducted by the payer and remitted on your behalf. It is not an error and it is not something the payer can stop doing as a favour. A tax treaty with the country you now live in may reduce the rate, and that reduction has to be claimed with evidence of your residence rather than assumed. Beyond the treaty, the route to a different result is the elective return under Section 217, which is a filing you choose to make.
Section 217 — meaning in cross-border tax
Section 217 explained: its meaning in cross-border practice, and why it matters to your filing.
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The Canadian elective return for a non-resident receiving pension and similar periodic amounts, worth making only when the graduated result beats the flat withholding.
Why the term matters
Terms here describe money that has already gone. Collection happens at source on a gross figure, which is almost always more than the eventual liability — and recovering the difference is a filing rather than a request.

Where cross-border trouble starts
A translated term is not the same term. Where a concept arrives through a treaty or a foreign statute in another language, the working definition is the one in the governing text, and the familiar word in the other language is a label rather than a rule.
Where you will meet it
The term is abstract until it is attached to a filing. These are the filings it attaches to.
What to do with it
If Section 217 is in a notice you have received, bring the notice. The definition matters far less than what the sender is actually asking for. Describe the situation in your own words; translating it into forms is our job.
In practice the useful question is not what the term means but what it does to your filing set. That is why each of these entries points at the pages where the term actually bites, rather than stopping at the definition and leaving the reader to work out the consequence.
Checked and signed off for the 2025 and 2026 filing seasons by Udit Gupta, International Tax, Cross-Border Tax & Transfer Pricing Expert, Legal Quotient Consultants. General guidance only. Your own facts decide the answer, so bring them to a call before relying on this.
International tax accountant — what this page covers
This is the page to read on international tax accountant. It takes Section 217 in order — the test that decides who is affected, the returns and forms that follow from it, and a fee quoted in writing before anything starts.
Files that look like this one
Several Canadian pensions withheld at different rates
A retiree living in a treaty country received amounts from a former employer's plan, a government retirement benefit and a registered plan withdrawal, with each payer applying a different rate. The first task was simply to establish what had actually been withheld, from the annual slips rather than from bank credits. We then computed the graduated result for each open year. The engagement produced elections for the years in which the graduated basis was lower, no election for the year it was not, and one schedule the client now uses to check each year as it closes.
Client who had been electing every year out of habit
An adviser had filed the elective return annually for a client without recomputing whether it helped, and in one year the election had increased the Canadian tax rather than reduced it. Each year has to be tested on its own facts, because the mix of Canadian amounts and worldwide income moves. We recomputed the open years on both bases. The engagement produced a corrected position for the year that had gone the wrong way, and a simple annual test that shows, before anything is filed, which basis the year falls on.
Payer withholding at the domestic rate when a treaty rate applied
A pension payer had no evidence of the recipient's country of residence on file and was therefore deducting at the domestic rate on each remittance. We assembled the residence evidence the payer needed and put it in front of them, which corrected the rate applied to later amounts, and separately dealt with the years already deducted. The engagement produced a corrected withholding rate going forward and a computation for the earlier years showing whether the election, the treaty route, or the two in combination gave the better outcome in each of them.
Departure payment and monthly amounts from the same employer
A client leaving Canadian employment received a payment on departure and then monthly amounts from the employer's plan. Only some of that belongs to the category the election covers, and the client had assumed all of it did. We characterised each receipt from the plan documents and the employer's slips before any computation was attempted. The engagement produced an election covering the qualifying amounts, a clear statement of which receipts sat outside it and why, and a note of how the excluded amount was taxed instead.
Electing in Canada reduced the credit available abroad
A client living in a country that taxes residents on worldwide income wanted the Canadian withholding brought down. Computed on the Canadian side alone the election looked clearly worthwhile. Once the foreign credit was modelled, most of the Canadian saving was absorbed by a smaller credit in the country of residence. We prepared both computations side by side for each open year. The engagement produced a decision taken on the combined result rather than the Canadian one, with the working retained so the same question can be answered quickly in later years.
Part year abroad with pension received on both sides of the move
A client returned to Canada in the middle of a year, having received pension amounts while still resident elsewhere and further amounts after arriving. Only the receipts from the non-resident part of the year fall within the election, so the date residence changed had to be established before anything else. We fixed it on the facts of the move and the documents behind them. The engagement produced a divided year with the election applied to the non-resident portion alone, the remainder picked up on the ordinary return, and a written record of the date and the basis for it.
Social Security Contributions Owed in Two Countries at Once
A totalization agreement assigns contributions to one system and exempts the other, but only against a certificate obtained in advance. Without it both sets come out of the same salary and neither is straightforward to recover.
Read how this one runsA Secondment Whose Paperwork Decided the Tax
Who employs, who directs and who bears the cost are the facts a treaty article turns on, and an assignment letter is where they are recorded. Drafting it with the tax position in view prevents an argument later.
Read how this one runsAll case studies — every published engagement in one place.
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Also asked about Section 217
Sometimes, and the mechanism is an election rather than a request. Section 217 lets the Canadian tax on those amounts be recomputed at graduated rates, with the withholding treated as money already on account; if the recomputed figure is lower, the difference comes back. If it is higher, you do not make the election and the withholding stands. So it is worth testing every year rather than adopting as a policy, because the answer moves with the size of your pension, the credits available to you, and what else you receive from Canadian sources.
A small pension is precisely where it is worth testing, because graduated rates start low and a flat withholding on a modest amount can easily exceed what the graduated calculation produces. Two things decide it. The first is the total of the Canadian amounts the election covers. The second is whether you can reach the personal credits, which depends on what proportion of your worldwide income for the year is Canadian-source. Someone whose income is almost entirely a Canadian pension is in a very different position from someone with substantial earnings in their new country, even where the pensions are identical.
Usually not twice over, but the relief has a direction and it matters which way round it runs. Typically the country you live in taxes the pension as a resident and gives credit for the Canadian tax, within limits set by its own rules and by the treaty. That is why the election is not a decision to take on the Canadian numbers alone: reducing the Canadian tax can reduce the credit available where you live, so the saving is smaller than it looks and can occasionally disappear altogether. Work out both sides before electing rather than afterwards.
The section covers a defined list of periodic amounts rather than everything you receive from Canada: retirement pensions, government retirement benefits, annuity payments, withdrawals from registered retirement plans and certain amounts paid on leaving employment are the familiar ones. Receipts outside the list stay where they are and are not improved by electing. This matters because a year's receipts often mix the two, and the arithmetic only works once each amount has been placed correctly. Ask each payer for the annual information slips rather than working from bank credits, because the slips say which category an amount fell into.
The election has a filing deadline of its own for each year, and where that has gone by, the withholding is the final Canadian tax for the year. Nothing about a later election reopens it. The other half of the point is more encouraging: each year is tested separately, so electing once does not commit you and declining once does not disqualify you. If you have several years behind you, establish which of them are still open before computing anything, then test each open year on its own figures rather than assuming the answer repeats.
On the non-resident form for that country, reporting only the income that country may tax. In the US that is the 1040-NR; in Canada it is a T1 restricted to Canadian-source amounts, plus the elective returns under sections 216 and 217 where withholding on rent or pension income exceeded the real tax. The commonest error is filing the resident form by default and reporting worldwide income to a country with no right to it. See Form 1040-NR.
None of it is tax-free for being foreign. A Canadian resident is taxed on worldwide income, so foreign salary, interest, dividends, rent and gains all go on the return, converted to Canadian dollars. What genuinely reduces the bill is the basic personal amount, the credit for foreign tax already paid, and any treaty article that exempts a specific type of income. The reporting thresholds people have in mind — the foreign property statement, for one — govern reporting, not exemption. See the foreign tax credit.



