If you ask a Canadian GP for one piece of financial advice, they'll say: "Incorporate as soon as you can." If you ask a UK GP what that means, they'll look confused — because physician incorporation barely exists in UK general practice.
In Canada, it's the single most impactful financial decision you'll make after choosing your province.
What a CCPC is
A Canadian-Controlled Private Corporation (CCPC) is a legal entity — a company — through which you conduct your medical practice. Instead of billing the provincial ministry as an individual and paying personal income tax on everything, you bill through your corporation. The corporation receives the income, pays you a salary and/or dividends, and retains the rest within the corporate structure.
The tax advantage exists because corporate tax rates are significantly lower than personal tax rates on income retained within the corporation.
How the numbers work
Without incorporation (sole proprietor): You earn CAD $350,000 in billings, deduct CAD $120,000 in overhead, and pay personal income tax on the remaining $230,000. At combined federal/provincial marginal rates of ~50% on income above ~$220,000, you're paying substantial tax on every dollar above that threshold.
With incorporation: Your corporation earns $350,000, deducts $120,000 in overhead (same as before), and the corporation pays tax on the retained profits at the small business rate — approximately 9–12.5% (combined federal/provincial, varying by province) on the first $500,000 of active business income. The difference between 50% personal and 12% corporate on retained income is where the savings come from.
You then pay yourself a combination of salary (tax-deductible for the corporation, taxed personally) and dividends (not deductible, but taxed at preferential personal dividend rates). An accountant structures the salary/dividend split to minimise your total tax burden.
Typical annual tax saving for a GP earning CAD $300K–$400K gross: CAD $20,000–$40,000 compared to practising as a sole proprietor. Over a career, this compounds substantially — particularly if you invest retained corporate earnings for retirement.
What you can do with corporate funds
Money retained in your corporation can be invested — in stocks, bonds, real estate, or other assets. The corporate tax deferral means more capital is available for investment earlier. Eventually, when you extract the money (through dividends, salary, or on corporate dissolution), you'll pay personal tax — but the deferral over decades of compounding is worth tens or hundreds of thousands of dollars.
Many Canadian physicians use their corporation as their primary retirement savings vehicle, supplementing or replacing personal RRSP (the Canadian equivalent of a pension) contributions.
When to incorporate
Incorporate when you have more income than you need to spend. If you're spending everything you earn (paying off student debt, establishing a household, supporting a family during your first year in Canada), incorporation provides less benefit because you need to extract all the income personally anyway.
The typical advice: incorporate in your second or third year of Canadian practice, once your income is stable and you have surplus to retain in the corporation. Some physicians incorporate from day one; the setup costs (CAD $2,000–$5,000 in legal and accounting fees) mean it's not worthwhile unless you'll retain meaningful income corporately.
What UK doctors need to know
This concept doesn't exist in UK GP practice. UK GPs who are partners are self-employed but don't operate through corporations (there are limited exceptions). The NHS pension, which UK GPs rely on for retirement, doesn't have a Canadian equivalent of comparable value. The CCPC is how Canadian physicians build their own retirement fund.
You need a specialist accountant. Not a generalist, not your cousin who does personal tax returns — a chartered accountant who specialises in physician tax planning. They'll handle: incorporation setup, annual corporate tax returns, salary/dividend optimization, corporate investment strategy, and the interaction with personal tax (RRSP, TFSA, spousal income splitting through dividends).
Budget CAD $3,000–$6,000/year for accounting fees. This sounds expensive but pays for itself many times over through tax optimization.
Understand the passive income rules. Since 2018, the federal government has restricted the small business deduction for corporations with significant passive investment income (above $50,000/year). Your accountant will structure your investments to manage this threshold.
The bottom line
Physician incorporation through a CCPC is not a loophole — it's a standard, legitimate, and expected part of Canadian medical practice. Roughly 60–70% of Canadian physicians are incorporated. The tax savings are substantial and compound over a career. For UK doctors moving to Canada, understanding and implementing incorporation is one of the highest-return financial decisions you'll make — and one that has no UK equivalent to prepare you for it.
Get a good accountant. Incorporate when the time is right. Your future self will thank you.
iatroX supports doctors building careers across borders. AI clinical search and Canadian qbank for clinicians. Built by a practising NHS GP and entrepreneur.