Introduction

When a shareholder of a private corporation dies, their shares do not simply transfer to their heirs without tax consequences. Canadian tax law deems the deceased to have disposed of all their property at fair market value at the time of death — which can trigger a capital gain on the shares that must be reported on the deceased's terminal T1 return.

For families who have built significant corporate wealth, this "death tax" on the deemed disposition of shares is often the largest single tax event in the estate.

Scenario: Dr. Armand Dies With $1.8 Million in His MPC

Dr. Armand, 71, is the sole shareholder of a medical professional corporation. The corporation holds $1.8 million in retained earnings invested in a balanced portfolio. Dr. Armand dies in October 2026. His wife, Celeste, is the beneficiary of his estate.

The Deemed Disposition at Death

At the moment of Dr. Armand's death, the Income Tax Act deems him to have disposed of his shares at their fair market value. The FMV of the shares must be determined — typically by a business valuator. For a corporation holding $1.8 million in investments, the shares' FMV reflects the underlying asset value.

If the ACB of the shares is $50,000 (nominal original cost), the deemed capital gain is approximately $1.75 million. At a 50% inclusion rate and the top Ontario marginal rate, the tax on the deemed gain is approximately $468,000 — payable from the estate.

The Spousal Rollover Exception

Where the shares are transferred to a surviving spouse or common-law partner (or to a spousal trust), there is no deemed disposition at fair market value. Instead, the shares transfer to the surviving spouse at the deceased's ACB — $50,000 in Dr. Armand's case. The capital gain is deferred until the surviving spouse eventually disposes of the shares (by sale, gift, or their own death).

In the Armand scenario, Celeste receives Dr. Armand's shares at his ACB of $50,000. No capital gain is triggered at his death. The $468,000 tax is deferred until Celeste disposes of the shares.

The spousal rollover is the primary mechanism for deferring the death tax on corporate shares — and it is automatic for most estate structures where the shares pass directly to a spouse or to a spousal trust that meets the specific requirements.

When the Shares Pass to Children or a Non-Spouse Beneficiary

If Dr. Armand's shares pass to his children (not to Celeste), the spousal rollover does not apply. The full deemed capital gain — $1.75 million — is reported on Dr. Armand's terminal T1. The estate owes approximately $468,000 in tax.

This tax must be paid from the estate's assets. If the estate's liquid assets (bank accounts, registered accounts that passed outside the estate) are insufficient to cover the liability, the estate executor may need to liquidate corporate assets — triggering further corporate tax on those dispositions.

The Capital Dividend Account and the Estate

Dr. Armand's corporation has a capital dividend account (CDA) balance — representing the non-taxable portion of capital gains realised on the investment portfolio over the years. After Dr. Armand's death, the estate or the surviving beneficiary can direct the corporation to pay capital dividends from the CDA before making other distributions — extracting that amount tax-free.

Maximising CDA distributions before or alongside the estate administration is a meaningful planning step that reduces the overall tax burden on the estate's beneficiaries.

Planning Before Death: What Changes the Outcome

For business owners who want to manage the deemed disposition tax before it arises:

Freeze and defer: An estate freeze shifts future growth of the corporation to the next generation or a family trust, capping the deceased's gain at the current value of the frozen shares.

Life insurance: Corporate-owned life insurance, sized to cover the anticipated deemed disposition tax, provides the estate with liquidity to pay the tax without liquidating corporate assets.

Gradual distribution: Drawing down the corporation's retained earnings over the years — rather than allowing them to accumulate inside the corporation indefinitely — reduces the FMV of the shares and therefore the deemed gain at death.

When to Speak With a CPA

For any shareholder of a private corporation whose estate planning has not specifically addressed the deemed disposition of the shares at death, a review with both a CPA and an estate lawyer is warranted. The planning options are numerous — and they are far more effective when implemented years before death than weeks after.

Rotaru CPA works with incorporated professionals and their families on estate planning and the tax implications of share transfers at death. Book a consultation to discuss your estate planning.