Talk to the people who would run your file: fixed fees agreed in writing before work starts, and a named adviser who answers for it.
Everything about how this practice runs comes from one decision: the fee is agreed in writing before the work starts, and it does not move.
Below: how the practice runs, what clients ask first, two worked files with their numbers, the process end to end, and the published fee.
Everything about how this practice runs comes from one decision: the fee is agreed in writing before the work starts, and it does not move. That single commitment sets the scope conversation, the review standard and the way we say no to work we should not take.
Everything else on this page follows from this. That is the practical value of a specialist here: not better arithmetic, but knowing which of several possible rules governs our review process & who signs off before the return is built on the wrong one.
I have been quoted by the hour before and had no idea what the final number would be.
I want to know who is actually reviewing my return, not which brand is on the letterhead.
My last accountant did not understand the second country at all.
These are not edge cases. They are what happens when two systems each apply their own logic to one person, and the person is expected to reconcile the result. See also paying from abroad — currency and method.
The same point, with figures rather than adjectives.
Take C$87,000 of income taxed in both countries. Assume the other country charged 32% on it and the home country would charge 27% on the same amount.
| Item | Amount |
|---|---|
| Income taxed in both countries | C$87,000 |
| Tax paid abroad (assumed 32%) | C$27,840 |
| Home tax on the same income (assumed 27%) | C$23,490 |
| Credit available (lesser of the two) | C$23,490 |
| Home tax still payable | C$0 |
The credit fully absorbs the home liability on this income, so nothing further is payable at home — but the return still has to be filed and the credit still has to be claimed, by category and by country. Your version of this table is the useful one, and it takes a short call and a document pack to produce.
Example figures throughout, selected to make the rule visible, with rates and thresholds assumed for the demonstration. Your actual filing uses figures confirmed with the issuing authority for your tax year.
This is what the rule produces when you put figures through it.
Take C$87,000 of income taxed in both countries. Assume the other country charged 21% on it and the home country would charge 43% on the same amount.
| Item | Amount |
|---|---|
| Income taxed in both countries | C$87,000 |
| Tax paid abroad (assumed 21%) | C$18,270 |
| Home tax on the same income (assumed 43%) | C$37,410 |
| Credit available (lesser of the two) | C$18,270 |
| Home tax still payable | C$19,140 |
The credit absorbs C$18,270 and leaves C$19,140 payable at home, because the home rate on this income is the higher of the two. The balance is real cash and it is due on the home timetable, which is why instalments get raised in the first meeting. Change any one of those inputs and the answer moves, which is why we run it on your own figures rather than on an illustration.
Illustrative figures, not a client engagement: the amounts are chosen to make the mechanism legible, and the rates and thresholds are assumptions stated for the example only. We confirm every one of them against the issuing authority for your own tax year before anything is filed.
If that describes your position, the next step is a short call — not a form.
Reviewed against current guidance for the 2025 and 2026 filing seasons by Udit Gupta, Cross-Border Tax Expert, Legal Quotient Consultants. This is general information rather than advice about your file — a short call is the way to get the second.
This is the page to read on international tax accountant. It takes our review process & who signs off 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.
The return had been built on the date the client gave for leaving, which was the date of the flight. The reviewer asked what had happened to the home and to the family in the weeks either side, and the answer moved the date into a different period. Everything downstream shifted with it: which income belonged to which part of the year, and which reporting obligations had actually started. The file went back to the preparer and was rebuilt on the corrected date, with the evidence for that date recorded alongside it.
The tax paid abroad was real and the amount was right, but it had been claimed against the year the payment was made rather than the year the income belonged to. That is the kind of error that survives every arithmetic check, because nothing is wrong with the numbers themselves. The reviewer noticed the mismatch between the income schedule and the relief claimed, and the file was corrected before filing. The engagement produced a return where the relief and the income sit in the same year, and a note explaining the timing for whoever handles it next.
The obligation had been identified and a report prepared, so nothing was missing. What the second reading questioned was how one holding had been classified, because the category determines what must be disclosed about it and the description in the file did not match the category chosen. Re-reading the account documentation settled it the other way, and the report was amended before submission. The point of the write-up is that a filing can be present, on time and still wrong in a way only a reader who goes back to the source documents will find.
The preparer had built a position on the treaty between the two countries. The reviewer's question was simpler than that: whether the domestic rule in the country of residence already produced the same treatment without needing the treaty at all. It did. The position was rewritten to rest on the simpler ground, with the treaty analysis kept in the file as the alternative argument rather than the primary one. A position that depends on more machinery than it needs is harder to defend, and this is the sort of thing a second reader is there to notice.
The filings themselves were complete. What the reviewer sent back was the explanation that accompanies them, which had been written as an apology rather than as an account of what happened and when. A disclosure is judged substantially on that narrative, so it was rebuilt to set out the sequence of events, what the client knew at each point, and what they did once they knew. The engagement produced a submission whose story matches the documents behind it, which is the only version that holds up if it is questioned.
Everything was ready except one statement from a foreign institution, which the client believed would confirm what they had told us. The reviewer would not sign the file on a recollection. The statement arrived some weeks later and differed from that recollection in a small way that changed an amount and the schedule it sat on. Filing on the earlier version would have meant amending afterwards and explaining why. The engagement produced a return filed once, on documents, with the wait recorded in the file so the delay was a decision rather than a drift.
A cross-border return prepared on one side only is usually right in isolation and wrong in combination. The review checks residence, source and relief in that order, and says plainly whether an amendment is worth making.
Read how this one runsResidence is decided on ties, not on a form, and the review asks for evidence of every one of them. The file assembles the ties that were severed and the ones that remained, and answers the questionnaire against the treaty rather than around it.
Read how this one runsAll case studies — every published engagement in one place.
Strategy and compliance for income, assets and families spread across borders.
Performance income is taxed where earned — Regulation 105 in Canada, withholding agreements in the U.S. — with special treaty articles overriding the usual rules.
Performance income is taxed where the performance happens, and the deduction is usually taken at source on the gross fee before expenses. Recovering the difference is a filing exercise in the other country, and it only works if the tour, the residency and the withholding certificates were documented while the work was being done.
On the first call we establish the scope — countries, years, entities, filings — and quote a fixed fee for it in writing. If the scope changes we re-quote before continuing, and nothing is filed until you have approved it.
That is how most of these engagements run. They keep the domestic file, we take the cross-border piece, and the boundary is agreed in writing so nothing is done twice or missed.
A second adviser who did not prepare it, and whose name you are given. The reviewer's job is not to re-do the arithmetic. It is to test the judgements: whether the residence position holds, whether the right country's rule was applied first, whether the documents in the file actually support what the return says. A reviewer who agrees with everything is not reviewing. The practical consequence is that a file can be sent back, and sometimes is. If you would rather put a question to the reviewer than to the preparer, ask, and that conversation happens.
The things that do not show up as errors. Arithmetic is checked by software; judgement is not. A second reading asks whether the facts in the file are the facts the return was built on, whether an election or a position was taken deliberately or by default, whether a foreign filing obligation was considered and dismissed for a recorded reason rather than simply missed, and whether the treatment of one item is consistent with the treatment of another. It also asks what a reviewer at the tax authority would want to see, and whether that material is in the file rather than in somebody's memory.
Preparation and sign-off are separate steps here, deliberately. The person closest to a file is the worst placed to spot what they have assumed, because by the third reading the assumption has started to look like a fact. Separating the two puts somebody with no investment in the earlier decisions in front of the file before it goes anywhere. Both names sit on the file internally, and the adviser who answers for the work is named to you at the start of the engagement rather than discovered afterwards.
By separating the steps, and by writing the reasoning down as the work is done. A position recorded at the time, with the material it rests on, can be tested by somebody else; a position carried in the preparer's head cannot. The review then works from the facts forward to the return, rather than reading the return and looking for something odd, which is the direction that catches the expensive errors — a foreign account considered and set aside wrongly, relief claimed in the wrong year, an entity treated one way for one country and another way for the other.
Yes. Ask at any point and the conversation happens. It is a reasonable request, and the reason people hesitate to make it is that in many firms the reviewer is a role rather than a person you could ring. Here the adviser who answers for the file is named at the start, and being able to put a question to them directly is part of what the fee buys. If the question is about a judgement in the return — why one country was treated as having the first claim, for instance — that conversation is better had before filing than after. The number is +1 (416) 619-0068.
The file stops until it is resolved, and the resolution is written down. Both readings are set out with the facts and the material each relies on, and the question is decided on that rather than on who is more senior. Sometimes the answer is that the position is genuinely arguable, in which case the file records which way it was taken and why, so the reasoning exists in writing if it is ever asked for. A disagreement settled quietly and left out of the file is the worst of the available outcomes, because the next person to read it has no idea a question was ever raised.
A taxable presence in another country under the treaty — typically a fixed place of business such as an office, branch, factory or workshop, or a dependent agent habitually concluding contracts on your behalf. Some treaties add a services test measured in days. Purely preparatory or auxiliary activity is excluded, but that carve-out is narrower than it sounds: one senior employee working from home in the other country, with authority, has been enough. See business profits and permanent establishment.
It is legal. Two countries can each have a valid claim on the same income — one because the income arose there, the other because you live there — and nothing prohibits both from exercising it. What exists instead is relief: tax treaties allocate the claim, and domestic law gives a credit for foreign tax paid. The relief is not automatic, though. It is claimed on a return, and unclaimed relief is simply lost. See how double taxation is relieved.
Where our partners studied — CPA Canada (In-Depth Tax Program), AICPA, the Institute of Chartered Accountants of India and the Malaysian Institute of Accountants.
