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Accounting for incorporated professionals

Reviewed by EverStone CPA · July 2026

Medical, dental, legal and engineering corporations are governed by a regulator before they are governed by the tax rules. What differs, and every guide and page that covers it.

Quick answer: Professional corporation accounting differs from ordinary small business accounting because a regulator decides who may own the shares, associated corporations share a single small business deduction, passive investment income inside the company can grind that deduction away, and the split-income rules limit paying dividends to family members.

Four-stage chain showing that a professional corporation’s regulator sets who may own voting and non-voting shares, that share structure then determines whether corporations are associated and whether dividends can be split with family, that profit left inside is taxed at the small business rate as a timing tool, and that investment income accumulating inside can reduce access to that rate
The regulator decides the shape before tax planning starts.

A professional corporation is not simply a small company with a licence attached. It exists under the statute governing the profession, which sets who may hold shares and how the corporation must be named and permitted. Only once those conditions are met does the tax analysis — deferral, compensation mix, retirement saving — become relevant. Most structuring mistakes in this vertical come from doing those two steps in the wrong order.

What is different about professional corporation accounting

The regulator decides the share structure

Each profession’s governing body sets its own rules about who may own voting and non-voting shares, and they differ by profession and by province. Some permit family members to hold non-voting shares; others restrict ownership to licensed members entirely. Because the share structure drives every later planning option, it is the first fact to establish and the last thing to change casually.

Income is high, stable and fully taxable in the year earned

Unlike a product business, a practice has little inventory, few capital assets outside equipment and leaseholds, and income that arrives predictably. That makes the corporation primarily a timing tool: profit left inside is taxed at the small business rate now and the remainder when it is drawn out. Where a professional needs every dollar for personal spending, incorporation delivers little beyond cost — which is a legitimate conclusion, not a failure.

Associated corporations share one small business deduction

The reduced corporate rate applies to a limited amount of active business income, and that limit is shared among associated corporations. A professional with a practice corporation, a clinic corporation and an interest in a partnership can find the limit divided in ways that were never intended. The association rules turn on control and share ownership, including shares held by family, which is why they interact directly with the regulator’s rules above.

Retained profit invested inside the company has a cost

Investment income earned on funds left in the corporation is taxed at high rates, and above a threshold it also reduces access to the small business rate on the active practice income. For a practice that accumulates surplus year after year, that grind is the central planning question and the usual reason a holding company enters the conversation.

Splitting income with family is narrow

The tax on split income rules apply the top marginal rate to dividends paid to family members who are not sufficiently involved in the business, with exclusions that are hard for a professional practice to meet. Paying a spouse a reasonable salary for work actually performed remains available and defensible; paying dividends to a non-participating adult child generally is not.

Practice-specific assets and events

Buying into a practice, buying out a retiring partner, or acquiring goodwill are capital transactions with their own treatment, not deductible costs. Dental and medical practices carry equipment and leasehold improvements written off over defined periods, and lawyers and engineers carry unbilled work in progress. Each one changes what the year-end statements should show.

The guides, tools and pages for this vertical

Deciding and setting up

Getting paid

Structure, surplus and growth

Practice and city pages

Who this fits

This hub is written for physicians, dentists, lawyers, engineers, architects, accountants, optometrists, chiropractors, veterinarians and other licensed professionals operating through a professional corporation — whether solo, in an associate arrangement, or as one owner among several. It also fits professionals still deciding whether to incorporate, and those approaching a buy-in, buy-out or retirement. Consultants who are not licensed by a regulator have more structuring freedom and should start with the agency and consulting hub.

How this runs remotely

EverStone CPA is a sole-practitioner CPA firm at 32615 South Fraser Way in Abbotsford, BC, and the work is fully remote. Professionals in practice have the least flexible schedules of any client group, so meetings happen by video outside clinic hours, records move electronically from the practice management system and the bookkeeper, and corporate and personal returns are filed directly with CRA. The same process serves a dentist in Abbotsford and an engineer in Calgary; what changes is the provincial regulator’s rules and the provincial tax rate, not the way the work is done.

About this page
EverStone CPA

Prepared and reviewed by a Chartered Professional Accountant at EverStone CPA, an Abbotsford CPA firm working fully remotely with small businesses and incorporated contractors across the Fraser Valley and Canada. About the firm →  ·  Book a free consult →

Common questions

Incorporated professionals — common questions

Can my spouse own shares in my professional corporation?+
That is decided by the statute and regulator governing your profession in your province, not by tax law. Some professions permit family members to hold non-voting shares; others restrict ownership to licensed members. Even where shares are permitted, the tax on split income rules may still limit what can usefully be paid on them.
Is incorporating worth it if I spend everything I earn?+
Often not. A corporation mainly defers tax on income left inside it. If every dollar is drawn out for living costs, there is little deferral to gain and there is a corporate return, annual filings and regulator permits to pay for. The calculation changes as soon as income exceeds what the household spends.
What does it mean that my corporations are associated?+
Associated corporations share a single limit on income eligible for the reduced small business rate. Association turns on control and share ownership, including shares held by family members, so a practice corporation and a clinic or property corporation can be associated without any deliberate structuring. The result is that the reduced rate covers less income than expected.
Why does investing inside my corporation reduce my small business rate?+
Once passive investment income inside the associated group exceeds a threshold, access to the reduced rate on active business income is progressively reduced. For a practice that has been accumulating surplus for years, that grind is usually the trigger for reviewing whether investments should be held somewhere else.
How is a practice buy-in treated?+
Generally as a capital transaction rather than a deductible expense: you are acquiring shares or an interest in assets and goodwill. How the purchase is financed, and whether it is made personally or corporately, affects whether the interest is deductible and what the eventual sale looks like. It is worth structuring before the agreement is signed.
Can I still contribute to an RRSP if I take dividends?+
Dividends do not create RRSP contribution room; only salary does. That is one of the main non-tax consequences of a dividend-only compensation plan, alongside the absence of CPP contributions. Whether it matters depends on whether the corporation is expected to fund retirement instead.

A CPA for professional corporations

A buy-in on the table, a second corporation in the picture, or a compensation mix that has not been revisited in years — describe the structure and you will get a straight answer.