Alta Vista: the hospital district and the medical professional corporation

Alta Vista is where a lot of Ottawa’s medicine lives outside the hospital walls. The Ottawa Hospital’s General campus sits on Smyth Road, the Riverside campus is minutes south, and the streets between them hold the homes of a large share of the physicians, specialists, and senior clinicians who work there. The tax question that comes up again and again in this neighbourhood is the same one: should I incorporate. A medical professional corporation is genuinely useful, but it is misunderstood in both directions, and the wrong expectation is expensive.

The short answer, before the detail: a medical professional corporation does not reduce the tax on money you spend. It reduces the tax on money you do not spend, by letting you pay a low corporate rate on retained earnings now and the personal tax only when you draw them out later. If your billings and your household spending are close to each other, the corporation collects fees and paperwork and gives you almost nothing back. If you routinely bill well above what you live on, the deferral compounds and the structure pays for itself many times over.

What incorporation actually buys a physician

The first thing to be clear about is that incorporating does not lower the tax on money a doctor needs to live on. Income that comes out of the corporation to fund the household is taxed in the physician’s hands at ordinary personal rates, incorporated or not. The province lets physicians incorporate as professionals, and the rules that govern an Ontario professional corporation sit on top of the tax rules, but the corporation does not change what your own spending costs in tax.

What it changes is the treatment of money you do not need this year. A Canadian controlled private corporation pays a low combined federal and Ontario rate on active business income up to the small business limit, far below the top personal rate. The current federal and provincial thresholds and rates are published by the CRA, and because they move, it is worth reading the Ontario small business deduction page rather than trusting a figure someone quoted you at a hospital lunch. A specialist at the General who bills well over what the household spends can leave the surplus in the corporation, pay the low corporate rate now, and invest or defer the personal tax until the money is actually drawn. That deferral is the real engine. It is worth a great deal to a high-billing physician with room to save, and close to nothing to a resident or early-career doctor who spends everything they earn. Incorporation is a tool for retaining earnings, not a discount on drawing them.

Where the break-even actually sits

Because the benefit is entirely about retained earnings, the honest test is not how much you bill. It is how much you can leave behind, and for how long. The grid below is how the question is usually worth framing before any accounting fee is spent, and it explains why two physicians on the same billing number can get opposite advice.

Salary, dividends, and the mix that is not automatic

Once a corporation exists, the physician has to decide how to pay themselves, and there is no single right answer. Salary is deductible to the corporation, creates RRSP contribution room, and requires CPP contributions from both the corporation and the individual. Dividends are paid from after-tax corporate income, carry no CPP, and build no RRSP room, but can be simpler and are sometimes the better choice depending on the year.

The mix matters more than people expect, and it interacts with things that have nothing to do with the office. A physician’s family with young children may lean toward enough salary to maximise RRSP room and support the child care expense claim; one near retirement may weight it differently to manage the pension and the eventual wind-down of the corporation. The full comparison of salary against dividends matters here because the answer genuinely changes with the year, and because eligible and non-eligible dividends are taxed differently in the shareholder’s hands. The remuneration decision is a yearly one, made against that year’s income, spending, and savings, not a setting you choose once.

Paying a spouse is no longer the easy answer it once was

Physicians who incorporated a decade or more ago often remember a structure where dividends flowed to a spouse or an adult child in a lower bracket. The tax on split income rules closed most of that. Where they apply, the amount is taxed in the recipient’s hands at the top marginal rate, which removes the entire point of paying it to them.

There are exclusions, and they are worth knowing precisely rather than roughly. A family member who genuinely works in the business on a regular, continuous and substantial basis can fall outside the rules. An adult over twenty-four receiving a reasonable return on their own capital contribution can fall outside them. But the exclusion for owning a large enough stake, known as the excluded shares exclusion, is not available where the corporation earns its income principally from providing services, which describes a medical practice exactly. That single point is why so many physician share structures built before 2018 no longer do what their owners think they do, and why the broader family income splitting picture is worth revisiting rather than assumed. Where a spouse does real administrative work, paying a documented, reasonable salary for that work is the defensible route, and the documentation is the part people skip.

Passive investments inside the corporation can undo the advantage

Money left in the corporation gets invested, and investment income earned inside a corporation is treated differently from the active billings that produced it. Once passive investment income in a year passes a threshold, access to the small business rate on the following year’s active income begins to be ground down, and above a second threshold it can disappear entirely.

A Riverside clinician who lets a large portfolio accumulate inside the corporation without watching that number can quietly lose the very advantage the corporation was set up to give, and the loss lands a year later, which is what makes it easy to miss. This does not mean the portfolio should not be there. It means the composition of the return matters, because interest, dividends and realised capital gains do not all count the same way, and how the grind is calculated is something to model before a rebalance rather than discover on a T2 assessment.

The costs and the paperwork are real

A medical professional corporation is not free to run. It files its own T2 corporate return every year, keeps its own books, may need to register for and file GST/HST depending on the services it provides, and must comply with the college’s rules on professional corporations including who may hold shares. The return is due six months after the corporation’s year end, but the tax itself is due earlier, and the balance-due day for a corporation falls two months after year end, extended to three for many Canadian controlled private corporations claiming the small business deduction. Filing on time and paying late still costs interest, and that gap between the two dates catches new incorporators constantly.

There are accounting fees, and there is a discipline required: the corporation’s money is the corporation’s, and treating the business account as a personal chequing account is exactly the kind of thing that undoes the structure. Amounts drawn without being recorded as salary or dividends become shareholder loans, and a shareholder loan left outstanding too long can be added to your personal income.

For a physician clearing well above household needs, those costs are small against the deferral. For one who is not yet at that point they can outweigh it, which is why the honest answer to “should I incorporate” in Alta Vista is sometimes “not yet.”

Getting the timing right near the hospital

The two expensive mistakes around the Ottawa Hospital campuses are opposite ones. Incorporating too early, before there is retained income to shelter, buys a compliance burden and no deferral. Incorporating too late means years of paying full personal tax on money that could have sat in the corporation. Both are avoidable with a look at the actual numbers: billings, household spending, existing RRSP and TFSA room, and the savings the corporation would realistically hold each year.

That is a conversation worth having before the incorporation, not after, because the setup, the share structure, and the first year’s remuneration mix are far easier to do right than to unwind. If you practise in Alta Vista and are weighing a professional corporation, or you already have one and are not sure the salary and dividend mix still fits your household, get in touch and we can run the break-even on your real billings and set the structure to do what you actually need it to do.