The situation
The deadline to file a notice of objection was eleven days away when Mehrdad finally called our office. A stack of unanswered correspondence from the tax authority had been piling up on his kitchen table for weeks, tucked behind a stack of seed catalogues, while he waited to hear back on a letter of his own that had gone nowhere. He runs a small vegetable operation outside Picton through a numbered corporation he set up eight years earlier, mostly to keep the farm's equipment loans separate from his household finances. The corporation's income swings hard with the weather and the market, and in the leaner months Mehrdad drives for a rideshare app to keep cash moving through the household. It is not a business he enjoys explaining to people who ask what he does, but it covers the mortgage in February when nothing is growing. A neighbour, Andrei, who spends most of the year behind the wheel of a long-haul truck and had gone through his own dispute with the tax authority a few years back, was the one who finally convinced Mehrdad to stop waiting and call a lawyer before the window closed for good.
Two years earlier, the corporation had bought an extended-cab diesel pickup to replace an aging farm truck that had finally given out. The new truck cost more than Mehrdad had planned to spend, but it could tow the equipment trailer, haul produce to the farmers' market on weekends, and double as the vehicle he used for rideshare pickups when the fields were frozen and there was little else to do. His accountant, Arman, prepared the corporate return that year and claimed capital cost allowance on the full purchase price, the same way he had for every other piece of equipment the corporation owned.
What neither of them accounted for is that passenger vehicles bought by a corporation are treated differently from farm equipment under the rules that govern depreciation for tax purposes. There is a prescribed ceiling on the cost a corporation can use as the basis for claiming capital cost allowance on a vehicle designed mainly to carry people rather than cargo, and the truck's price sat well above it. When the corporation's return was audited, the portion of the deduction claimed above that ceiling was disallowed, along with interest that had been accruing since the original filing.
Mehrdad tried to handle the response himself at first. He wrote a letter explaining that the truck was essential to hauling produce and mailed it to the address printed on the reassessment. Three months later nothing had changed except that the objection deadline had crept much closer, and the amount in dispute, still under fifteen thousand dollars but real money for a farm operating on thin margins, had continued to grow.
The legal problem
A letter mailed to an auditor is not the same thing as a notice of objection. Once a reassessment is issued, there is a specific window during which a taxpayer can formally dispute it through the appeals process, and missing that window is serious but not necessarily the end of it: a taxpayer can apply for an extension of time to object, first to the tax authority itself and, if that is refused, to the Tax Court of Canada, and separately, a taxpayer relief or adjustment request can sometimes reopen a year even when no objection was ever filed. None of those routes is as clean or as reliable as filing on time, though, and Mehrdad's letter had gone to the wrong desk entirely, and because it did not follow the format the process requires, it had simply been filed away without triggering any review at all, which is why nothing had changed after three months of waiting.
The underlying rule was not really in dispute. Passenger vehicles bought by a corporation are subject to a ceiling on the capital cost that can be used to calculate depreciation, regardless of how the vehicle is actually used day to day. It does not matter that the truck spent most of its time on farm roads or that a portion of its use was for the rideshare work Mehrdad relied on for winter income. The ceiling applies to the class of vehicle, not the purpose behind the purchase, and Arman's approach of writing it off the same way as a tractor or a trailer had been the wrong method from the start. A tractor has no equivalent ceiling because it is not a vehicle designed to carry passengers, and that single distinction was the entire source of the reassessment.
That made this a case with a narrow path forward. There was no argument available that would restore the full deduction, because the ceiling is a bright-line number set out in the rules and not something an appeals officer has discretion to waive because a farm's margins are thin or because the vehicle genuinely served farm purposes most of the time. What was still very much open, though, was whether the corporation could get its objection properly on file before the deadline closed, whether the recalculation used by the auditor was accurate down to the dollar, and whether the interest that had been accruing while Mehrdad's own letter sat unanswered in a drawer somewhere could be addressed separately from the principal dispute.
There was also a practical risk sitting underneath the numbers. If the deadline passed without a valid objection, the corporation would lose not only the disallowed amount but any leverage to negotiate the recalculation itself, and Mehrdad would be left trying to claw the matter back through an extension application or a relief request instead, neither of which was guaranteed to succeed the way a timely objection would have been. Given how close the deadline already was, the first task was not persuasion. It was making sure the door stayed open at all, because every other argument in this file depended on that door still being unlocked.
What we did
- Filed a protective notice of objection immediately, before doing any further analysis of the numbers, so that the deadline could not close on the corporation regardless of how long the underlying review took to complete properly. This was the single most time-sensitive step in the whole file, and it preserved every option that followed, since a missed deadline would have made the rest of the work irrelevant no matter how strong the recalculation turned out to be.
- Pulled the corporation's asset ledger and the truck's original purchase agreement to confirm the exact price paid, the date of purchase, and how the vehicle had been classified in the corporate books at the time of filing, which let us verify the auditor's disallowed figure line by line rather than simply accepting a number handed to us on a reassessment notice.
- Recalculated the allowable capital cost allowance using the correct prescribed ceiling that applies to passenger vehicles bought by a corporation, which showed the auditor's number was close but had applied a slightly outdated ceiling figure, producing a modest error of a few hundred dollars in the corporation's favour once the arithmetic was redone properly.
- Corresponded directly with the appeals officer assigned to the file, presenting the recalculation together with supporting math and the purchase documentation in a single organized package, which moved the conversation away from Mehrdad's earlier unanswered letter and onto a properly documented record the officer could act on without further back and forth.
- Requested relief from part of the accrued interest on the basis that the corporation had attempted to respond promptly, even though the method it used, a plain letter rather than a formal objection, was not the correct one, which is a request the tax authority will genuinely consider when the underlying facts show a good-faith attempt to engage.
- Advised on separating farm use from rideshare use going forward, recommending a simple daily mileage log so that if the corporation ever bought another vehicle with genuinely mixed personal and business use, there would be a clear contemporaneous record supporting whatever portion of the costs it eventually claimed.
- Reviewed the corporation's other recent equipment and vehicle purchases with Arman line by line to confirm none of them carried the same passenger-vehicle classification issue, closing off the possibility of a second, larger problem surfacing unexpectedly in a future audit cycle a year or two down the road.
- Set out a short written policy for future vehicle purchases so that any vehicle bought through the corporation going forward would be checked against the current ceiling before the return was ever filed, rather than after a reassessment arrived and the interest clock had already started running.
The outcome
The objection was accepted as filed, and the recalculation brought the disallowed amount down slightly from the auditor's original figure once the correct ceiling was applied to the purchase price. A portion of the accrued interest was also cancelled, on the basis that Mehrdad's earlier letter, while procedurally wrong, showed he had tried to engage with the reassessment rather than ignore it entirely. The corporation still owed the balance of the disallowed deduction and the remaining interest, and that balance, kept under fifteen thousand dollars in total, was paid out over several months on a payment arrangement the appeals officer agreed to rather than as a single lump sum during the growing season.
This was not a case where the underlying problem disappeared. The ceiling on vehicle depreciation is not something a corporation can argue its way around, no matter how legitimate the business use of the vehicle actually is, and Mehrdad's farm ultimately paid tax on a deduction it should never have claimed in full in the first place. What changed through the process was the size of the loss and the terms attached to it: a smaller principal amount once the ceiling was recalculated correctly, reduced interest in recognition of the earlier attempt to respond, and a payment schedule the farm could actually meet without disrupting the operating cash it needed to get through planting and harvest.
Mehrdad has since kept every equipment and vehicle purchase receipt in a folder he reviews with Arman before anything new is claimed on the corporate return, and the mileage log for the replacement truck he eventually bought sits in the glove compartment where he can reach it if another audit ever asks. The lesson cost him money he had not planned to spend, but it was a contained loss rather than an open-ended one, and the corporation avoided the far worse outcome of a final reassessment it had no documented way left to challenge, which is where the file was headed before that first call came in.
What you can learn from this
- A corporation cannot deduct the full cost of a passenger vehicle the way it deducts farm or business equipment; a prescribed ceiling applies to the class of vehicle regardless of how it is actually used.
- A letter to the auditor is not a notice of objection. If you disagree with a reassessment, use the formal objection process and its deadline; missing it can sometimes still be fixed with an extension application or a relief request, but neither is guaranteed, so do not count on them.
- When a deadline is close, file something to preserve your rights first and work out the details after. A protective objection costs little and keeps every later option open.
- Interest that accrues while you are trying to sort out a dispute yourself can sometimes be reduced if you can show you responded promptly, even if the method you used was not the correct one.
- Mixed-use vehicles owned by a corporation should have a mileage log from day one. It is far easier to build that record before an audit than to reconstruct it after one begins.
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