Almost every new physician and dentist hears the same advice in their first year of practice: “Incorporate as soon as you can.” It sounds like a tax-saving tool no high earner should skip.
But for many early-career professionals, incorporating in year one adds cost without adding much benefit. The timing matters far more than most people realize — and there are several moves that pay off more in those first few years.
Here is a practical way to decide when a professional corporation makes sense for you, and what to do in the meantime.
The Incorporation Myth That Catches New Graduates
A professional corporation does not lower the tax on money you spend. It lowers the tax on money you leave inside the corporation.
Active business income kept in a professional corporation is taxed at the small business rate — roughly 9% to 12.2% combined, depending on your province — compared to top personal rates above 50% in several provinces. That gap is real, but it is a deferral. When you pay the money out to yourself, personal tax is owed on the dividend or salary.
Canada’s tax system is designed so that, if you withdraw everything each year, the total tax paid is roughly similar whether you are incorporated or not. In that case, the corporation mostly adds:
- Setup and legal costs
- A separate corporate tax return and bookkeeping every year
- Extra administration with your provincial regulatory college
The Retainable Surplus Test
Before incorporating, run one simple calculation:
Gross billings – practice overhead – your personal after-tax spending needs = retainable surplus
Personal spending needs include student debt payments, rent or a mortgage, childcare, and your lifestyle. If that number is close to zero, the corporation has little to shelter. If you can consistently leave a meaningful amount inside the company for several years, incorporation starts to earn its keep.
Income Splitting Isn’t What It Used to Be
Many new graduates still expect to split income with a spouse through dividends. Since 2018, the Tax on Split Income (TOSI) rules have closed most of that door. One key detail: the “excluded shares” exception that helps many other business owners is not available to professional corporations.
Splitting generally still works once you reach age 65, or if a family member is actively and regularly working in the practice. On top of TOSI, your provincial college controls who can own shares at all — and those rules vary by province.
A Special Note for Associate Dentists
Associates should be careful. If your arrangement looks more like employment than an independent contractor relationship, incorporating can create a “personal services business” — which loses the small business rate and most deductions. Have your associate agreement reviewed before you incorporate.
Four Moves That Pay Off Before You Incorporate
1. Open Your FHSA Now — Even If You’re Not Buying Yet
First Home Savings Account room only starts building once the account is opened. You get $8,000 of room per year, up to $40,000 lifetime, and you can carry forward up to $8,000 of unused room.
You generally qualify if neither you nor your spouse lived in a home one of you owned during the current year or the previous four calendar years. If you never buy, the balance can move into your RRSP without using your RRSP room. For a resident or new graduate, opening it early costs nothing and keeps future options open.
2. Build RRSP Room While Your Income Is “Earned Income”
RRSP room equals 18% of your prior year’s earned income, up to the annual limit ($33,810 for 2026). As an unincorporated professional, your net practice income counts.
Once you incorporate and pay yourself mainly through dividends, new RRSP room stops building. Those early high-income years quietly create room you can use later. You can even contribute now and save the deduction for a year when you’re in a higher bracket.
3. Lock In Your Insurability While You’re Healthy
Your future earning power is your largest asset in your first decade of practice. Disability coverage with a future insurability rider lets you increase coverage as your income grows — without new medical questions. Some carriers also offer programs for residents and new graduates with simplified underwriting.
Health changes are unpredictable. Coverage is easier to put in place today than after a diagnosis.
4. Match Term Life Insurance to Your Real Obligations
If you carry student debt, a mortgage, or have a young family, term life insurance is usually the most cost-effective way to protect them in the early years. Size it to your debts and your family’s needs, not to a round number.
Signs You’re Ready to Incorporate
Incorporation often makes sense when several of these are true:
- You consistently earn more than you need to spend, and expect that to continue for years
- Your student debt is under control or nearly paid off
- You plan to buy into or purchase a practice, and would like to repay that loan with corporate dollars taxed at the lower small business rate
- You want to build a long-term corporate investment portfolio
A Research-Backed Note on Investing Your First Surplus
New doctors and dentists often feel confident picking healthcare, pharma, or biotech stocks they understand clinically. Eugene Fama’s Nobel-winning research shows prices already reflect available information quickly, so informed investors rarely hold a lasting edge. Finance professor Hendrik Bessembinder later found that just about 4% of U.S. stocks accounted for all net stock market wealth created from 1926 to 2016 — meaning most individual stocks lag even Treasury bills over their lifetime. When your career is already concentrated in healthcare, a globally diversified, low-cost portfolio spreads risk in a way that a handful of familiar names cannot.
The Bottom Line
Incorporation is a powerful tool for doctors and dentists — at the right time. In the early years, opening your FHSA, building RRSP room, protecting your insurability, and covering your debts often deliver more value than a corporation you can’t yet fill.
The best financial planning for new doctors and dentists isn’t about doing everything at once. It’s about doing things in the right order.
Not sure whether you’re ready to incorporate? Book a private consultation with the team at financialadvice.ca or call at
587 718 8001 and we’ll run your retainable surplus test together and map out the right sequence for your first years in practice.
Related guide: See our complete overview of financial planning for doctors and incorporated professionals in Canada. Dentists can also read our guide to financial planning for dentists.
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