A Private Tax Office for Canadian Owner-Managed Companies

Most owner-managed companies run on a familiar arrangement: a bookkeeper keeps the records, and an external accountant prepares the corporate return once a year. That arrangement handles compliance. It does not handle risk.

Tax exposure is created in the months between filings — when a draw is booked to the shareholder loan account, when a management fee moves between companies with no agreement behind it, when a contractor is paid without anyone examining the relationship, when an HST/GST return is prepared from different numbers than the T2 will later report. By the time the annual return is filed, those positions are already fixed. The return records decisions; it does not manage them.

A private company tax office closes that gap. It is a service description, not an entity: a standing advisory mandate under which a senior advisor reviews the company's tax position while decisions can still be changed — quarter by quarter, transaction by transaction, letter by letter.

CRA audit readiness is not a binder assembled after a letter arrives. It is the state of a file maintained so that a CRA auditor's first requests — books and records, bank statements, support for the largest deductions and credits — can be answered promptly, completely, and once.

Under the mandate, readiness has three parts. First, the documentation position is kept current, so nothing has to be reconstructed under deadline. Second, a response protocol exists before it is needed: one designated point of contact, no informal conversations with a CRA auditor, every production logged. Third, the deadlines that protect the company's rights are tracked — above all the 90-day window to object to an assessment or reassessment, which runs from the mailing date of the notice, not from the day someone opens the envelope.

Readiness changes the character of a tax audit. A file that answers cleanly tends to keep a review narrow; gaps invite expansion into estimates, assumptions, and indirect verification methods.

For owner-managers, the shareholder loan account is the single most watched number in the file. CRA has operated a dedicated shareholder-loan compliance initiative aimed at private companies, using automated review of the balances reported in corporate filings — a debit balance that persists across year ends is visible, and it is examined.

The rules are unforgiving in a particular way. A loan not repaid within one year after the end of the corporation's taxation year in which it was made can be included in the shareholder's income in full under subsection 15(2) of the Income Tax Act — and repayments that form part of a series of loans and repayments do not count. A benefit conferred on a shareholder — personal expenses run through the company, corporate property used below value — is included in the shareholder's income under subsection 15(1). In both cases the corporation gets no offsetting deduction, so the same dollars are effectively taxed twice: once in the corporation and again in the shareholder's hands. A low-interest or interest-free balance carries a deemed interest benefit besides.

None of this requires wrongdoing. It accumulates from ordinary draws booked to the loan account and left there. Quarterly oversight exists precisely so that a balance is planned out — through salary, dividends, or documented repayment — inside the window, on the company's terms rather than a CRA auditor's.

Before it closes — ideally before the letter of intent. Every material transaction has a tax character that is cheapest to set early and expensive to repair: a purchase or sale of assets versus shares, a refinancing that moves money between entities, a reorganization under section 85 where the T2057 election must be filed correctly and on time, a real property transaction with its own HST/GST treatment.

For owners who may sell within a few years, the review reaches further. Qualification for the lifetime capital gains exemption — $1.25 million for qualifying small business corporation shares, indexed from 2026 — depends on tests that run for 24 months before a sale, and passive assets accumulating on the balance sheet can quietly disqualify shares long before a buyer appears. An employee ownership trust exit carries its own deadline: the $10 million EOT exemption expires December 31, 2026.

Under a standing mandate, the rule is short because it has to be absolute: no transaction in the group closes without its tax character reviewed and documented.

The mandate is built to sit alongside the people already in place, not to displace them. The bookkeeper or controller keeps the records; the external accountant can keep preparing the returns; counsel is engaged where legal questions or privilege call for it. What the tax office adds is a single senior point where tax risk is owned.

Coordination runs in both directions. Internally, the finance team receives clear documentation standards and a quarterly agenda, so the file improves as a by-product of routine work. Externally, I work with the company's lawyers on reorganizations, purchase agreements, and disputes — and where a matter is sensitive, sequencing matters: communications with an accountant are generally not privileged in Canada, so analysis that may need protection is structured under counsel's instruction from the outset.

For lawyers, M&A advisors, and bankers with a private-company client, the mandate also functions as the tax seat at the client's table — independent analysis, deal support, and a disciplined file.

Often a company needs both, because they hold different mandates. A fractional CFO is a finance-operations role: cash flow, forecasting, management reporting, banking relationships, pricing, systems. Tax typically enters that mandate once a year, through the return. A private company tax office is a tax-risk role: its entire subject matter is CRA exposure and the decisions that create it.