Rebuilding the Paper Trail: An HST Audit Reversed in Vaughan

The situation

Halima ran two businesses out of the same home office in Vaughan. Weekday mornings she did bookkeeping for a handful of small local businesses, invoicing under her own name as a sole proprietor. From spring through fall she ran a small landscaping crew, mowing and mulching for residential clients across the same neighbourhoods. Both businesses were registered for HST, the harmonized sales tax that combines the federal and Ontario portions of sales tax, because her combined revenue had passed the threshold at which registration stops being optional and becomes mandatory. She charged HST on her invoices, remitted what she collected, and claimed input tax credits, the mechanism that lets a registered business recover the HST it pays on its own purchases, for equipment, software, fuel, and subcontractor labour.

She kept records the way most sole proprietors do: a shoebox of receipts, some digital, some paper, sorted loosely by season and topped up with whatever her bank and credit card statements showed. Her HST returns were filed on time every quarter for three years. Then a letter arrived notifying her that the Canada Revenue Agency, the federal agency that administers the Excise Tax Act and collects HST, had selected her file for an audit covering the two most recent fiscal years.

What the audit found

The audit itself took several months. An auditor requested her purchase records to verify the input tax credits she had claimed, and Halima sent what she had: a mix of receipts, screenshots of e-transfers to her landscaping subcontractors, and printed bank statements. Months later, the auditor's proposal letter arrived, and it was worse than she had expected. The CRA proposed to deny roughly $34,000 in input tax credits claimed across the two years, split across three categories.

About $9,000 related to landscaping equipment, a mower, a trailer, and small tools, where Halima had the credit card statements showing the purchases but had not kept the original supplier invoices, which is what the Excise Tax Act's documentary requirements actually call for. A further $6,000 covered software subscriptions and office equipment for the bookkeeping side, where several invoices were missing her HST registration details or the supplier's, because she had used a personal account for some purchases before separating her business banking. The largest piece, about $19,000, was for subcontractor labour on the landscaping crew, paid partly by e-transfer with no formal invoices at all, just informal text confirmations of hours worked.

The auditor's position was straightforward and, on the face of the file as submitted, defensible: the Excise Tax Act requires a registrant claiming an input tax credit to have specific supporting information on hand, including the supplier's name, the amount of tax paid, and in many cases the supplier's own HST registration number. Bank and credit card statements show that money moved, but they do not show what was bought, from whom, or whether HST was actually charged on it. Without that underlying documentation, the auditor treated the credits as unsupported and proposed to deny them, along with the interest that had been accruing since the original returns were filed.

What we did

1. Triaged the three categories separately. A blanket denial of $34,000 was really three distinct documentation problems with three distinct paths back to compliance. Treating them as one undifferentiated dispute would have wasted the strongest evidence on the weakest claims, so the file was split from the start.
2. Went back to suppliers for duplicate invoices. For the $9,000 in equipment purchases, most of the retailers involved were still in business and kept their own sales records. We helped Halima request duplicate or replacement invoices showing the HST charged, which is exactly the kind of after-the-fact documentation the CRA will generally accept if it independently confirms the original transaction.
3. Corrected the registration mismatch on the software and office claims. The $6,000 in software and office purchases mostly turned out to have proper invoices, they had simply been filed under a personal account rather than the business one, with the business's HST number missing from a few of the receipts. We compiled a reconciliation showing which purchases were genuinely business expenses, matched to bank records and, where invoices lacked the registration number, to publicly available confirmation of the supplier's own HST registration.
4. Built a subcontractor file from scratch for the labour claims. The $19,000 in subcontractor payments was the hardest piece, since no invoices had ever existed. We worked with Halima to reconstruct a proper record: written confirmations from each subcontractor describing the work performed and the amounts paid, matched against the e-transfer dates and amounts, and a sworn statement from Halima describing her normal business practice of paying crew members by e-transfer for cash-flow reasons. Not every dollar could be tied to a subcontractor who was still reachable or willing to confirm the work in writing.
5. Submitted the rebuilt file as a formal response to the proposal letter. Rather than waiting for a notice of reassessment and objecting afterward, which adds months to the process, the reconstructed documentation was submitted directly in response to the auditor's proposal, while the file was still open and the auditor could reconsider before finalizing anything.
6. Flagged the one category likely to stay partly disallowed. Roughly $4,000 of the subcontractor claims involved a crew member who had since left the country and did not respond to requests for confirmation. Rather than contest that portion indefinitely, we advised Halima to accept that piece as likely lost and focus the file's credibility on the roughly $30,000 that could be properly documented.

The outcome

The auditor accepted the rebuilt documentation for the equipment and office and software categories in full, restoring about $15,000 of the originally proposed $34,000 denial without further dispute. The subcontractor labour category took longer and involved a follow-up request for clarification, but the written confirmations, e-transfer records, and Halima's sworn statement of her ordinary business practices were ultimately accepted for all but the one crew member who could not be reached. In the end, roughly $30,000 of the original $34,000 in disputed input tax credits was restored, with the remaining $4,000 confirmed as denied along with the associated interest.

Halima's HST liability for the two audited years dropped close to what she had originally reported and remitted, with a modest balance owing that reflected only the unrecoverable subcontractor portion. Just as importantly, the audit gave her a template for how her records needed to look going forward: separate business banking, original invoices retained rather than relied-on-later credit card statements, and written engagement confirmations for every subcontractor before work began rather than after the fact.

The broader lesson from the file was that an HST audit is rarely a dispute about whether a business actually incurred an expense. It is a dispute about whether the business can prove it in the specific way the Excise Tax Act requires. Halima's spending was genuine and her business was profitable and legitimate throughout, but genuine spending and provable spending are not the same thing to an auditor, and the gap between them cost her real money and months of stress that better habits from day one would have avoided entirely.

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