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If you are a doctor, dentist or optometrist, you have probably been told to incorporate. Maybe by a colleague at the coffee machine. Maybe by an accountant during your first tax season. Maybe by an ad on Instagram promising you a way to slash your tax bill. The advice comes hot and confident, and it is usually delivered as a yes-or-no decision.
The truth is that incorporation is a sequencing decision, not a yes-or-no one. Almost every doctor will eventually incorporate at some point in their career. The real question is when, why and how to do it in a way that actually helps you. Get the timing wrong, and you can pay thousands in extra fees for a structure that is not doing you any good yet. Get it right, and it becomes one of the most powerful long-term wealth tools available to a Canadian physician.
Here is how to think through incorporation as a doctor without doing it too early, too late or for the wrong reasons.
What Incorporation Actually Is
At the simplest level, incorporating means creating a separate legal entity, a corporation, that earns your professional income. Instead of billings flowing to you personally, they flow into the corporation. You then decide how much of that money to pay out to yourself and how much to leave inside the corp for later.
The advantage is tax deferral. On the first $500,000 of active business income, a Canadian-controlled private corporation is taxed at the small business deduction rate. In BC, that combined federal and provincial rate is roughly 11%. Compare that to a personal marginal tax rate that can hit 50%+ for high-income doctors, and the deferral becomes obvious. Money that stays inside the corporation gets taxed lightly on the way in and continues to compound before you eventually pull it out.
Think of it like an unlimited RRSP with more flexibility. You control the pace at which money moves from the corporate side to the personal side, which lets you smooth out your tax bracket over decades.
When Incorporation Makes Sense
The single best signal that incorporation is worth considering is simple. Are you consistently earning meaningfully more than you spend?
A useful rule of thumb is $50,000 of surplus income per year. If you are retaining $50,000 or more after covering your lifestyle, taxes and priorities, incorporation starts to earn its keep. The retained earnings compound inside the corp at the lower tax rate, and every year you delay pulling money out on the personal side is another year of tax deferred growth.
Beyond the pure numbers, incorporation makes sense when you have long-term visibility on your career. If you know you will be practicing at a strong income for the next 10 to 30 years, structuring around that reality early is a real advantage. Incorporation also gives you optionality: the ability to choose how you pay yourself (salary, dividends or a blend), the ability to invest inside the corp and the ability to eventually layer in strategies like corporately owned life insurance, an Individual Pension Plan (IPP) or estate freezes.
There is also the legal side. Depending on your practice, a lawyer may recommend incorporation for liability protection reasons even before the tax math strictly justifies it. Owners of commercial real estate, partners in a clinic or professionals in higher-risk niches may benefit from the separation an incorporated structure provides. That is a call your legal team makes based on your specific risk profile.
When Incorporation Does Not Make Sense (Yet)
This is the part of the conversation that gets glossed over. Incorporation costs money to set up and maintain. Legal fees to open. Accounting fees for corporate tax returns. Bookkeeping. Banking fees. All in, that is often $7,000 to $10,000 a year of overhead. If the tax deferral is not covering that overhead, incorporation is actively costing you money.
Several situations point toward waiting.
You still have significant registered account room. If your TFSA, RRSP and FHSA are not maxed out, those accounts should be filled before corporate strategies come into play. They have no barrier to entry, no ongoing fees and no complexity. A dollar into your TFSA compounds tax free forever. A dollar into your RRSP or FHSA gives you an immediate deduction. Corporate retained earnings do not offer that same simplicity or upfront benefit.
You have non-deductible debt. Student loans, personal lines of credit, credit cards at 7% or more. Paying that debt down is a guaranteed return that beats what most corporate investment strategies deliver in the first few years.
You are supporting family financially. First-generation doctors especially often carry a higher cost of living than their income suggests, because they are also providing for parents, siblings or extended family. If most of your income is going out personally to cover those responsibilities, there is no meaningful surplus to retain inside a corp.
You are early in your career and still spending most of what you earn. We see associate dentists and new physicians incorporate too early, on the advice of a colleague or a family friend, and end up worse off. They are earning $150,000 to $180,000, spending most of it and now they are also paying $8,000 to $10,000 a year in incorporation upkeep. That is not tax planning. That is a leak.
You are planning a major life change in the next couple of years. Starting a family and taking parental leave. A sabbatical to travel. A career pivot. If your next few years look nothing like the last few, incorporating around the income you have this year can lock in complexity you will not need. It is worth projecting two or three years out before pulling the trigger, not just reacting to a strong income year.
How to Actually Start the Process
Once the timing makes sense, the sequence matters. There is a specific order to how you should approach this, and skipping steps creates more work later.
Step 1: Start with your lawyer. Do not DIY incorporation off a website like getacorporation.com. As a medical professional, you need the right share structure, the right language and the right registration with your provincial college. Your lawyer gives instructions to your accountant. If your accounting firm has an in-house legal team, that can work too. Either way, legal comes first.
Step 2: Your accountant opens the corporation. Using the lawyer’s instructions, the accountant handles the actual incorporation paperwork, registers the corp with the CRA, sets up the tax accounts and gives you the corporate documents you will need for the bank.
Step 3: Open your corporate bank accounts early. This is the step that surprises most new doctors. Banks are slow. Getting an appointment with a corporate banking specialist can take a week and a half. Getting the actual accounts opened can take several more weeks. If you wait until your accountant delivers your incorporation documents before you even think about the bank, you can be a month or two into billing income personally before your corp accounts are ready to receive it. Book those appointments before your accountant is done, so the accounts are ready the same week the corp is registered.
If your profession lets you hold back billings temporarily, you can time it so nothing gets deposited to your personal account after the corp exists. If not, get the corporate accounts open as fast as possible to minimize the gap.
Step 4: Update your billings and stop earning personally. Every dollar that lands in your personal account after the corp exists is a dollar that should have been sheltered at the corporate rate. It might sound obvious, but this trips up more doctors than you would expect. Update your billing systems, your direct deposits and your invoicing so the money flows to the right account.
Step 5: Build a cash flow strategy. Once the structure exists, work with your accountant and planner to set up a compensation strategy (salary, dividends or blend), decide how retained earnings will be invested and coordinate the corporate side with your personal registered accounts. This is where the value of incorporation actually shows up. Without the strategy, you just have a more expensive way to earn the same income.
Common Myths and Misunderstandings
A few things we hear over and over from new doctors that are worth clearing up.
“Can my spouse own shares?” In most provinces, yes, as long as your spouse holds non-voting shares. Different share classes (often called Series A for you and Series B for your spouse) let the corporation pay different dividend amounts to each shareholder at different times. That is a way to compensate a spouse who is genuinely helping with the business (bookkeeping, billings, admin) or to shift income tax efficiently within a household. Your lawyer will structure this, and your provincial medical college has rules on what is allowed.
“Does every corporation get its own small business deduction limit?” No, and this is one of the most expensive misunderstandings we see. You get one small business deduction limit of $500,000 across all corporations you are a shareholder of. If you own a medical corporation and a real estate corporation, they share the same limit. If your spouse is a shareholder of the medical corp and separately owns another business, that can pull them into association rules too. The CRA tracks this by SIN. Opening multiple corporations does not multiply your small business deduction. It just multiplies your fees.
“Can I silo my operations to avoid this?” No. Some doctors try to keep their medical corporation with one accountant and their real estate or investment corporations with a different accountant to keep the numbers separate. The CRA sees everything under one umbrella. Even worse, if the structure looks like it was set up to reduce tax rather than for legitimate business reasons, the CRA can apply the General Anti-Avoidance Rule (GAAR), which gives them broad authority to undo aggressive tax structures and impose penalties.
“Can I incorporate retroactively to shelter last year’s income?” No. Once the income is earned personally, it cannot be moved to the corporate side after the fact. Incorporation is forward-looking only. This is why timing matters so much and why you cannot wait until tax season to make the decision for the year that just ended.
The Bigger Picture
The doctors who do best with incorporation are the ones who treat it as one piece of a coordinated long-term strategy, not as a magic bullet. The corporation opens up powerful tools: corporate investing, an IPP later in your career, corporately owned life insurance, estate planning options, income splitting through non-voting shares. But none of those tools matter if the structure is built on the wrong foundation, or if it is built too early to be useful.
The simplest test still applies. Are you retaining meaningful money you do not need to spend? Do you have visibility into a high income for the years ahead? Have you filled your registered accounts and cleared expensive debt? If yes on all three, the timing is probably right. If any of them are still a no, the answer is usually not “never.” It is “not yet.”
And when the timing does line up, remember that everyone’s personal finances are actually personal. What worked for the colleague at the coffee machine may not be your situation. Work through the questions honestly, engage your legal and accounting team early and let the numbers make the decision for you.
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This article is based on Episode 10 of Portfolio Talks, where we walk through the incorporation decision in detail, the step-by-step process to actually get it done and the common questions doctors ask.
Listen to the full episode here and subscribe so you do not miss future episodes built specifically for physicians.
Sources
- Corporation tax rates (including the small business deduction) – Canada.ca – https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/corporation-tax-rates.html
- Small business deduction rules and the passive income business limit reduction – Canada.ca – https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/federal-government-budgets/budget-2018-equality-growth-strong-middle-class/passive-investment-income/small-business-deduction-rules.html
- General anti-avoidance rule (GAAR) – Canada.ca – https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/compliance/how-combat-tax-evasion-avoidance/general-anti-avoidance-rule.html
- T2 Corporation Income Tax Guide – Canada.ca – https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4012.html
This content is provided for general informational purposes only. It is not intended to provide investment, tax or legal advice, and should not be relied upon as such.