Introduction
It starts simply enough. A business owner pays for a family dinner using the corporate credit card, meaning to sort it out later. Or personal phone bills run through the business account because the phone is also used for work. Or car expenses are claimed in full even though the vehicle is used for personal driving most of the time.
These are not unusual situations. They are, however, situations that carry real tax risk — and they are among the most common reasons incorporated businesses receive CRA reassessments.
The Shareholder Benefit Rule
Under section 15(1) of the Income Tax Act, when a corporation confers an economic benefit on a shareholder — or on a person related to the shareholder — that benefit is included in the shareholder's personal income for the year.
The benefit does not need to be intentional. It does not need to be structured as a payment. If a corporation pays for a personal expense and the shareholder does not reimburse the corporation or include the amount in income, the CRA can treat the payment as a shareholder benefit — taxable at the shareholder's full marginal rate, with no deduction available to the corporation.
This is a costly combination: no corporate deduction, plus personal income inclusion, plus potential interest and penalties if not caught at filing time.
Common Examples the CRA Looks For
Personal vehicle expenses: A corporation claims 100% of vehicle costs for a car that is also driven for personal use. The CRA expects vehicle use to be documented with a logbook showing business vs. personal kilometres. Without a logbook, the CRA may disallow the portion of expenses attributable to personal use and assess a shareholder benefit on that amount.
Meals and entertainment: The Income Tax Act already limits business meal and entertainment deductions to 50% of the eligible amount. Claims for meals that have no identifiable business purpose — family dinners, personal celebrations — can be assessed as shareholder benefits.
Home expenses: Where a home office is claimed, only expenses that relate to the portion of the home used exclusively for business qualify. Claiming a disproportionately large share of home costs — or expenses for areas of the home not used for business — creates reassessment exposure.
Personal travel: Vacation travel that is claimed as a business trip, or business travel extended for personal purposes without adjusting the claim, is a well-known audit trigger. The CRA may ask for itineraries, meeting notes, and documentation of business purpose.
Personal purchases: Electronics, clothing, home furnishings, and similar items purchased through the corporation without a clear and documented business purpose are candidates for shareholder benefit reassessment.
Why Clean Books Matter Beyond Tax
Beyond the CRA risk, co-mingled expenses make it harder to understand the actual profitability of the business. If personal expenses are flowing through corporate accounts, the financial statements do not accurately reflect business performance. This affects decisions about pricing, hiring, investment, and growth — as well as the ability to present clean financials to a lender or buyer.
The Documentation Standard
The CRA expects that business expenses be documented, reasonable, and incurred for the purpose of earning income. "Purpose of earning income" is the key test under section 18(1)(a) of the Income Tax Act. Expenses that fail this test are not deductible — and if paid by the corporation, may constitute a shareholder benefit.
Maintaining receipts, noting the business purpose of expenses at the time they are incurred, and keeping personal and corporate accounts completely separate are not suggestions — they are the baseline expectation for any incorporated business in Canada.
What a CRA Review Looks Like
In a CRA audit or review of a corporation, reviewer attention often focuses on the shareholder loan account, the expenses claimed against income, and whether personal costs appear to have flowed through the corporation. A pattern of co-mingled expenses can extend the scope of a review and increase the likelihood that other areas of the return are examined.
When to Speak With a CPA
If your corporate records reflect a mix of personal and business expenses — or if your bookkeeping has not kept pace with your business activity — addressing this proactively, before a CRA review, is far less costly than addressing it after one.
Rotaru CPA helps incorporated professionals maintain clean corporate records that hold up under CRA scrutiny. Book a consultation to review your expense documentation practices.