The CRA aggressively audits Medical Professional Corporations (MPCs) to crack down on “income splitting.” Under the Tax on Split Income (TOSI) rules, you cannot pay tax-free or low-tax dividends to family members unless they actively work at least 20 hours a week in your medical practice.
For doctors, dentists, and specialists across Canada, incorporating a medical practice has long been a smart strategy to manage taxes and save for retirement. However, the Canada Revenue Agency (CRA) views these Medical Professional Corporations as prime targets for audits. The government frequently updates the rules to prevent high-income earners from unfairly shielding their wealth from the top marginal tax brackets.
A major focus of CRA audits involves family members. 📈 In the past, a doctor in Vancouver or Toronto could easily pay large dividends to a spouse or adult child who was a shareholder, moving the income into a lower tax bracket. Today, strict federal rules make this incredibly dangerous without a rock-solid legal defence. If your clinic is facing an audit regarding passive investments or dividend payouts, securing an experienced tax lawyer from our directory is essential.
Step-by-Step Process: Defending a Medical Corporation Audit in Canada
CRA audits of medical professionals are complex and highly specialized. Whether you practise in Ontario, Alberta, or Manitoba, an audit typically unfolds in the following stages.
Step 1: The TOSI Questionnaire and Information Request
The audit usually begins with a letter requesting your corporate minute books and a detailed questionnaire regarding the Tax on Split Income (TOSI). 🔍 The CRA wants to know exactly who owns shares in your corporation and what those people do for a living. If your 20-year-old son in university received a $40,000 dividend from your medical practice, the CRA will immediately flag it for review.
Step 2: Proving Active Business Involvement
If you paid wages or dividends to family members, the burden of proof is entirely on you to justify the payout. To escape the TOSI penalties, you must prove that your spouse or child worked an average of at least 20 hours per week in the practice during the year. The CRA will demand to see timesheets, emails, payroll records, and descriptions of their actual duties (like bookkeeping or clinic management).
Step 3: Evaluating Passive Investment Income
Doctors often keep surplus cash inside their corporation to invest in stocks or real estate. 💰 The CRA will audit your corporate tax return to check your “passive investment income.” Under current Canadian rules, if your corporation earns more than $50,000 CAD in passive income in a year, your access to the Small Business Deduction (SBD) is slowly ground down. The auditor will review your portfolio to ensure you calculated this “grind down” correctly.
Step 4: The Tax Court of Canada Appeals
If the CRA auditor decides your family members did not genuinely work in the practice, they will reassess those dividends at the absolute highest marginal tax rate. You have 90 days to file a Notice of Objection. If the CRA Appeals Division sides with the auditor, your tax law firm can escalate the case by filing a formal appeal to the Tax Court of Canada.
How Much Does an Incorporation Audit Cost?
A failed audit for a medical professional is financially severe. Here is a breakdown of potential costs in CAD for 2026:
- TOSI Penalty Taxation: If caught by TOSI rules, the dividend is taxed at the highest provincial marginal rate (often over 50% in provinces like Ontario and BC), wiping out any tax savings you thought you had.
- Denied Salary Expenses: If the CRA determines a spouse’s $80,000 salary was “unreasonable” for basic clerical work, they will deny the corporate deduction, increasing your corporate tax bill.
- Tax Lawyer Fees: Professional representation for a high-net-worth medical audit and Tax Court litigation can range from $10,000 to $30,000+ CAD.
How Long Does the Process Take?
Because medical audits involve large sums of money and complex corporate structures, they are not quick. The initial CRA audit can take 6 to 12 months. If you decide to fight a TOSI reassessment, moving through the Notice of Objection stage and waiting for a hearing at the Tax Court of Canada can easily take 2 to 4 years.
TOSI Exemptions: Acceptable vs. Unacceptable Payouts
| Recipient of Dividend | Reason for Exemption | CRA Audit Risk Level |
|---|---|---|
| Spouse (Over Age 65) | Special TOSI exemption applies for retirement income splitting. | Low |
| Spouse (Under Age 65) | Must prove they worked 20+ hours a week in the clinic. | High |
| Adult Child (Age 18-24) | Rarely exempt unless actively working in the business. | Very High |
To ensure your corporate structure can withstand a federal audit, consider consulting a tax lawyer who specializes in medical professionals. Browse our directory to find the right firm for your practice.
Frequently Asked Questions (FAQ)
Can I pay my spouse a regular salary instead of dividends?
Yes, paying a salary is generally safer than paying a dividend, but the salary must be “reasonable.” If you pay your spouse $100,000 a year to do 5 hours of bookkeeping a month, the CRA will deny the corporate deduction.
What happens if my passive corporate income exceeds $50,000?
For every $1 of passive income over the $50,000 CAD limit, your corporation loses $5 of the Small Business Deduction limit. If your passive income hits $150,000 CAD, you lose the Small Business Deduction entirely and your active clinic income will be taxed at the much higher general corporate rate.
Can the CRA audit my personal and corporate taxes at the same time?
Yes. The CRA routinely conducts “parallel audits.” When they audit your Medical Professional Corporation, they almost always audit your personal T1 return and the returns of any family members who received corporate funds.
Should my accountant handle the Tax Court appeal?
While accountants are crucial during the initial audit, only lawyers have legal privilege. If the dispute escalates to the Tax Court of Canada, you must have a tax lawyer represent your corporation in a formal legal proceeding.
Leave a Reply