The following is an illustrative, composite scenario drawn from the kinds of files Barrett Tax Law handles. It is not a real, named-client matter. It is offered to show how a CRA audit defence is structured.
The situation
In a representative business-audit matter, the owner of a small contracting corporation received a CRA audit letter covering two tax years. The auditor asked for general ledgers, bank statements for both the corporate and the owner's personal accounts, and supporting documents for a list of expense categories. The letter set a production deadline and, as is common, framed the review as routine. It rarely stays routine. As the file progressed, the auditor issued written queries about specific transactions, then conducted a bank-deposit analysis — adding up the deposits to the owner's personal account and comparing the total to the income reported on the personal and corporate returns.
Several months in, the auditor issued a proposal letter (sometimes called a "30-day letter") alleging two things: that a series of deposits to the owner's personal account represented unreported business income, and that a block of vehicle, subcontractor, and home-office expenses should be disallowed for lack of support. The proposal also signalled a gross-negligence penalty. That document is the most consequential stage of most audits — it is usually the last clean opportunity to shape the evidentiary record before a reassessment crystallizes the auditor's conclusions.
The issue and the risk
The proposal letter combined a bank-deposit analysis with a gross-negligence penalty under subsection 163(2) of the Income Tax Act. That combination is what made the file serious. The deposit analysis treated every unexplained deposit as taxable revenue, and the penalty would have added 50% of the tax on the alleged unreported amount. Left unanswered, the proposal would have hardened into a reassessment that was far harder to move, after which the file would have shifted to the objection and appeal track.
- Personal-account deposits included loan advances, a transfer between the owner's own accounts, and a gift from a family member — none of which are income, but all of which looked like revenue in a raw deposit total.
- The disallowed expenses were real business costs that had simply been poorly documented, which is a documentation problem rather than a legal one.
- The penalty exposure turned the file from an accounting dispute into a legal one, because subsection 163(2) requires CRA to establish a state of mind, not just an error.
- Because some of the years sat near the edge of the normal reassessment period, there was an added incentive for the auditor to characterize the conduct as misrepresentation attributable to neglect or carelessness under subparagraph 152(4)(a)(i).
The approach Barrett Tax Law took
The proposal-letter stage is usually the last clean opportunity to shape an audit file before reassessment, so the work focused there. A common mistake is to treat the audit as a conversation rather than a record — loose explanations and "off-the-record" remarks tend to reappear later in the auditor's working papers. Every response was therefore written as a legal submission, precisely tailored to what CRA had properly requested rather than an unstructured document dump that would only generate new audit issues. The defence had three workstreams.
- Reconcile the deposits. Each deposit flagged in the bank-deposit analysis was traced to its actual source. Loan documentation, inter-account transfer records, and a contemporaneous note of the family gift were assembled to show which deposits were non-taxable, with a schedule that connected each deposit to its supporting document and explained the timing.
- Rebuild the expense support. Invoices, subcontractor agreements, mileage records, and a reasonable home-office allocation were marshalled to substantiate the disallowed costs, with a clear schedule tying each document to each adjustment so the auditor could verify the position without guesswork.
- Defend the penalty separately. Because the Crown bears the onus on a subsection 163(2) penalty, the response addressed the penalty as a distinct ground, documenting the owner's honest understanding, reliance on a bookkeeper, and the absence of any concealment. The penalty can be defended even where part of the underlying tax is conceded.
Throughout, objection and appeal rights were preserved in case the file did not resolve at the audit stage, and the file was prepared from the start as if it might end up before the Tax Court — a discipline that produces stronger records. Our CRA audit representation page and the CRA audit process guide walk through these stages in detail.
The illustrative outcome
In this representative scenario, the documented reconciliation removed most of the deposits from the income calculation, the rebuilt support restored the bulk of the disallowed expenses, and the gross-negligence penalty was withdrawn. As an example figure used purely for illustration, a proposed adjustment framed in the low six figures was reduced to a small fraction of that amount once the non-taxable deposits and the substantiated expenses were accounted for. The reassessment that ultimately issued was substantially reduced from the amount in the proposal letter. These figures and results are illustrative only — used here to show how the pieces fit together, not as a typical or assured outcome, because each audit turns on its own facts and documents.
The takeaway
A bank-deposit analysis is only as strong as the assumption that every deposit is income — and that assumption is frequently wrong. The most valuable work in an audit defence is done before reassessment, while the record is still flexible: reconciling the numbers, rebuilding the documentary support, and treating any proposed penalty as a separate fight the Crown has to win. Responding precisely, rather than over-producing, keeps the file from growing new issues. For anyone deciding whether to involve counsel, our guide on questions to ask before hiring CRA audit representation may help, and the overview of what triggers a CRA audit explains how these files tend to start.
Past results do not guarantee a similar outcome. Each matter turns on its own facts. This is an illustrative scenario provided for general information and is not legal advice.