Why physicians freeze: the corporation becomes the estate problem
A freeze matters to physicians because a medicine professional corporation quietly becomes the largest taxable asset in the estate. The corporation earns clinic income at the Ontario combined small-business rate of 12.2% on the first $500,000, you draw what the household needs, and the difference compounds inside the company for decades. A physician who incorporated at forty and invested the retained surplus can easily arrive at seventy with a corporation worth several times what the practice itself was ever worth.
At death, you are deemed to dispose of your shares at fair market value, so all of that accumulated value lands on your final return as a capital gain, and without planning the same value can effectively be taxed again when the corporation's assets are later distributed to your heirs. Executors manage that second layer with post-mortem tools, but the first layer, the size of the gain itself, keeps growing every year you do nothing. A freeze does one job: it stops your number from growing, today, and points all future growth at your family instead.
If you are earlier in the arc, not yet incorporated or unsure the corporation is worth keeping, start with should a physician incorporate in Ontario; a freeze only makes sense once there is real surplus to cap.
The mechanics, step by step
A freeze is a share exchange followed by a subscription, and for most physicians it runs in five steps. Nothing is sold, no cash moves, and done correctly nothing is taxed on the day it happens.
- Value the corporation. The freeze locks in today's fair market value, so the number must be defensible: the investment portfolio at market, plus whatever the practice itself is worth. Clean clinic reporting matters here, because a valuation built on tidy, current statements survives CRA scrutiny; one built on stale books invites it.
- Exchange your common shares for freeze shares. Under section 86, in a reorganization of the corporation's capital, your growth-carrying common shares become fixed-value preferred shares, redeemable and retractable at that locked-in value, typically voting, and it happens on a rollover basis with no election form. A section 85 exchange with a T2057 election is the alternative route when the facts call for it.
- Add a price adjustment clause. If the CRA later disagrees with the valuation, the clause adjusts the freeze-share value instead of detonating the plan.
- Issue new growth shares for a nominal amount. The new common shares are worth almost nothing on day one, because the freeze shares absorbed all existing value. Every dollar of growth from tomorrow forward accrues to them.
- Paper it properly. Articles of amendment, director resolutions and an updated shareholders' register, drafted by your corporate lawyer, with College filings kept current.
From that day, your estate exposure is a known, fixed number, and you still control the corporation through the voting freeze shares.
Ontario's professional corporation rules decide who holds the growth
The shareholder rules for a medicine professional corporation reshape the classic freeze. Ontario law restricts who may own shares of a health profession corporation: voting shares only the physician member, and non-voting shares only the physician's spouse, parents and children, with shares for a minor child held by an individual trustee. No holding company may be a shareholder, and the discretionary family trust that anchors a typical business owner's freeze is not available, because a trust can hold medicine PC shares only for minor children.
In practice, the growth shares are therefore issued as non-voting common shares directly to your spouse and adult children, or to a trustee for minors, while you keep every vote through the freeze shares. The corporation's certificate of authorization from the CPSO has to stay accurate through the reorganization, so share changes and College paperwork move together.
The no-holdco rule has a second, quieter consequence: multi-entity structures do not work for a physician the way they do for other owners. Surplus cannot move tax-free to a family holding company, so the investments stay inside the medicine PC and get frozen there, or come out as taxable dividends. Some physicians run a separate ordinary corporation for non-clinical ventures, real estate or unrelated investments, and that company can use conventional structures, but capital only reaches it through taxed hands first. We work through these layouts constantly as a CPA firm serving incorporated healthcare professionals across Ontario.
What a freeze does not do: the income side stays restricted
A freeze fixes the capital problem, not the income problem, and it is important not to buy it for the wrong reason. Family members holding growth shares can receive dividends, but the tax on split income rules generally tax those dividends at the top personal rate unless an exception applies. The realistic exceptions for a medical family are narrow: dividends to your spouse once you are 65 or older, or dividends to a family member who genuinely works in the practice on a regular basis, roughly an average of twenty hours a week. The excluded-shares exception that rescues other business owners is not available for a professional corporation.
The passive-income rules also survive a freeze untouched. Once the corporation's investment income passes $50,000 in a year, the federal small business limit begins to shrink, disappearing entirely at $150,000, though Ontario has not mirrored that grind for its own small-business rate. Investment income inside the corporation is taxed at roughly 50% up front, with part refundable when taxable dividends are paid out. A freeze changes who owns future growth; it changes none of these annual mechanics.
How you pay yourself, and what the corporation's investment income does to your rates, is its own decision with its own page: salary vs dividends for incorporated physicians. The freeze sits on top of a sound compensation plan; it does not replace one.
Before and after, and how the freeze pays you in retirement
The clearest way to see the freeze is side by side. Nothing about the clinic, your billing or your control changes; what changes is whose tax problem the future is.
| Item | Before the freeze | After the freeze |
|---|---|---|
| What you hold | Common shares worth everything, growing yearly | Voting preferred shares fixed at today's value |
| What family holds | Nothing, or non-voting shares with today's value baked in | Non-voting growth shares worth a nominal amount on day one |
| Value taxed at your death | Whatever the corporation grows to | The frozen value, minus any shares redeemed along the way |
| Future growth | Adds to your estate and your final tax bill | Accrues to the family's shares, taxed in their hands, later |
| Control | Yours | Still yours, through the voting freeze shares |
| Retirement income | Dividends as needed | Redeem freeze shares on a schedule, a built-in pension |
That last row is the underrated half of the plan. Redeeming freeze shares year by year through retirement, sometimes called a wasting freeze, pays you a steady taxable dividend and shrinks the estate exposure further with every redemption; many physicians who freeze at retirement age intend to waste the freeze substantially before death. If markets fall after a freeze, the structure can be refrozen at the lower value. Whatever remains at death is a capped gain your executor manages with the post-mortem toolkit, loss carryback under subsection 164(6) or a pipeline, chosen at the time, which is post-mortem planning territory and should be anticipated in your will now, not improvised later.
The facts that change the answer
Whether a freeze is worth doing, and when, turns on six facts:
- The surplus you will never spend. A freeze caps value; if you are likely to consume the corporation in retirement, there is little left to cap and redemptions do the work anyway.
- Your age and runway. The younger you freeze, the more growth you divert, but also the more flexibility you give up. Many physicians freeze in their late fifties or at a valuation trough.
- Who can actually hold the growth. Spouse, adult children, minors through a trustee. No adult-beneficiary trust, no holdco. If the intended heirs do not fit those boxes, the plan changes.
- Whether the practice is saleable. Most medical practices wind down rather than sell, so the freeze is really about the portfolio. A clinic with saleable value adds valuation and exit questions.
- Debt and covenants. Clinic financing can restrict redemptions and reorganizations, so lender consent belongs on the checklist before articles are amended.
- Alignment with your will. The freeze, the will, the corporate documents and the post-mortem plan must tell one story; a freeze that contradicts the will creates the litigation it was meant to prevent.
A freeze is defined-scope work, valuation, tax design, coordination with your lawyer and the College paperwork, which is exactly what our Strategic Projects engagement exists for, alongside the year-round work we do for incorporated physicians. A free 15-minute discovery call comes first, then scope and fee in writing.
Source: Ontario Regulation 665/05, Health Profession Corporations, under the Business Corporations Act.
