When a Canadian business owner expects their company to keep growing, the next-generation tax bill grows with it. An estate freeze stops that compounding: today's value is locked in at the owner's level, and future appreciation accrues to the next generation. Done right, it cuts the eventual tax cost of generational transfer dramatically.
The mechanic in two sentences
An estate freeze converts the founder's common (growth) shares of a corporation into preferred shares with a fixed redemption value equal to today's fair market value. The corporation simultaneously issues new common growth shares to the founder's family trust, the founder's children directly, or another holdco — and all future appreciation accrues to those new shares.
Why the freeze matters at death
Subsection 70(5) of the Income Tax Act deems a Canadian resident to have disposed of all their property at fair market value the moment before death. For a business owner holding common shares of an appreciating corporation, the deemed disposition triggers a capital gain on the entire accrued appreciation — taxed on the terminal T1 at top capital-gains rates.
Without a freeze, a corporation worth $5M today and $20M at the owner's death produces a $15M deemed-disposition gain at death (50% inclusion at top rates ≈ $2M federal/provincial tax). With a freeze done at $5M, the owner's deemed-disposition gain is capped at $5M (or zero, if Section 85 / 86 deferral pushed the cost base up). The $15M of additional appreciation now sits with the growth shareholders — and is only taxed when they actually dispose of the shares.
The three freeze mechanics
The two most common freeze mechanics are Section 86 and Section 85:
- Section 86 freeze — the owner exchanges existing common shares for new preferred shares of the same corporation in a tax-deferred share-class change. The corporation simultaneously issues new growth common shares.
- Section 85 freeze — the owner transfers existing common shares to a newly-incorporated holdco in a tax-deferred rollover. The growth shares are issued by the holdco. Used when an opco-holdco structure is desired.
A third option — Section 51 share-rights conversion — produces similar results in narrower circumstances.
Who gets the growth shares?
The standard freeze structures the growth shares to be held by a family discretionary trust. The trustees later decide which beneficiaries receive distributions of capital gains, dividends, or eventual share allocations. The discretionary structure preserves flexibility: at freeze time, the founder doesn't know which children will be in the business, which will be retired, which will be in low brackets — the trust lets the family make the decision later.
An alternative is direct issuance to identified children. Simpler in the short term, locks in the next generation at freeze time. Most freezes use the trust route for the flexibility.
The 21-year rule and the wind-out
A family discretionary trust faces a deemed-disposition under subsection 104(4) every 21 years. By the time the freeze is 20+ years old, the family is typically planning the trust wind-out: distribute the growth shares to the next-generation beneficiaries on a tax-deferred basis under Section 107(2), letting them continue holding directly. Many freezes are eventually unwound or restructured exactly because of the 21-year deadline.
Coordinating with the Lifetime Capital Gains Exemption
The LCGE shelters $1M+ of gain on qualifying small-business-corporation shares per claimant. When a family trust holds growth shares with multiple beneficiaries, each beneficiary can claim their own LCGE on their share of the eventual sale gain — multiplying the exemption across the family. A two-child family with proper trust structuring can shelter ~$3M of eventual sale gain instead of the founder's single $1M+.
When NOT to freeze
The freeze is a one-way commitment to the corporation's value at freeze time. If the business is in a temporary peak and likely to decline before recovery, freezing locks in a value the corporation may not return to for years. A "refreeze" can adjust to a lower value later, but each refreeze has cost and complexity. For mature businesses with flat or declining trajectories, the freeze may not produce material benefit.
Implementation
A typical freeze engagement runs 60-90 days from instruction to completion: valuation of the corporation (usually independent), drafting the new share classes in the corporate articles, settlement of the family trust (if used), Section 85 or 86 documentation, election forms, and post-implementation summary. Fees are typically fixed at the design phase and capped at the implementation phase.