A freeze does one specific thing: it stops future growth in a business from being taxed in the founder's hands. Done correctly under a rollover election, done years too late, or done and then never reviewed again, it produces three very different outcomes.
Key takeaways
STEP 01 OF 10
An estate freeze exchanges a founder’s common shares — which carry all the future upside — for fixed-value preferred shares, typically redeemable at today’s fair market value, while new common shares that will absorb all future growth are issued to family members, often through a family trust. The plain description a family-law-adjacent source gives it: a freeze works "using a rollover to exchange your growth shares for fixed-value preferred shares while new common shares (often held by family members, sometimes through a trust) absorb future growth" (treadstonelaw.ca).
The founder’s own tax exposure is frozen at the value on the freeze date — hence the name. Every dollar of growth after that date belongs, for tax purposes, to whoever holds the new common shares, not to the founder.
STEP 02 OF 10
The mechanism that makes a freeze tax-neutral on the way in is the rollover under ITA s. 85(1), which applies where a taxpayer disposes of eligible property "to a taxable Canadian corporation for consideration that includes shares of the capital stock of the corporation" and the parties "have jointly elected in prescribed form." The elected amount becomes both the deemed proceeds of disposition and the deemed cost of the new shares — set correctly, at or near the original adjusted cost base, no immediate capital gain arises on the exchange.
A parallel route exists in a straight share-for-share exchange under s. 86, which applies "where… a taxpayer has disposed of capital property that was all the shares of any particular class… and property is receivable from the corporation therefor that includes other shares of the capital stock of the corporation" (ITA s. 86(1)). The two provisions serve overlapping purposes and the choice between them is a drafting decision for the corporation’s own tax advisor — s. 85 is the more commonly used route because its elected-amount mechanic gives the parties more direct control over the resulting cost base.
STEP 03 OF 10
The rollover’s protection runs through paid-up capital as much as through the elected amount: the new preferred shares’ PUC is generally ground down so that the freeze does not create room for a tax-free return of capital beyond what the founder already had in the old shares. Getting this calculation wrong is one of the more common technical errors in an otherwise well-intentioned freeze, and the precise formula depends on the elected amount, any non-share consideration ("boot") taken back, and the PUC of the shares given up.
This is not a step to approximate. Confirm the PUC calculation in writing with the corporation’s tax advisor before the transaction closes, not after a future CRA review raises it.
STEP 04 OF 10
A freeze only protects growth that has not yet happened. Freezing a corporation that has already appreciated substantially locks in a founder’s exposure on everything to that point — it does nothing to shelter value already created. The commercially useful window is earlier than most owners assume: while the business still qualifies as a small business corporation and its value has meaningful room left to grow, not once a sale process is already underway.
A freeze executed the week before a sale process starts does not meaningfully shift value to the next generation — there is no growth period left for the new common shares to capture. If succession or an eventual sale is on the horizon at all, the freeze conversation belongs years before that horizon, not inside it.
STEP 05 OF 10
The tax benefit of a freeze compounds fastest when the underlying shares qualify, or can be made to qualify, as qualified small business corporation shares — the class of share eligible for the lifetime capital gains exemption under ITA s. 110.6. A share class label does not decide eligibility on its own: as one Ontario legal source puts it, "nothing in the qualifying tests asks whether the shares carry a fixed redemption value, a dividend preference, or voting rights — those are contractual features of the share, not a bar to eligibility on their own" (treadstonelaw.ca).
What does decide eligibility is whether the corporation is a Canadian-controlled private corporation, whether a sufficiently high proportion of its assets are used in an active business, and whether the holding-period tests are met — the full mechanics are covered in qualifying shares for the capital gains exemption. Confirm the corporation clears those tests before, not after, a freeze is executed on the assumption that it does.
STEP 06 OF 10
A freeze that puts new common shares into a family trust, or directly into more than one family member’s hands, sets up something a founder holding all the shares personally cannot access alone: each individual family shareholder who eventually disposes of their own qualifying shares can independently claim up to $625,000 of taxable capital gain under the lifetime capital gains exemption — a formula-based amount indexed for taxation years beginning after 2025 (ITA s. 110.6(2)(a) and s. 117.1(2)(c), same s. 110.6 source above).
This is the genuine structuring case for using a trust rather than direct family ownership in a freeze: it defers the decision of exactly which family member ends up with which shares until closer to the eventual sale, while still positioning multiple LCGE claims to be available when that day comes.
STEP 07 OF 10
The technical work does not end at the closing of the freeze transaction. A properly executed freeze "continues operating as intended regardless of how much time passes before a business sale occurs," but that continuity depends on the corporation’s own records staying accurate — share terms, redemption values, trust deeds and trustee minutes need periodic review to confirm "nothing has drifted out of compliance over the years" (treadstonelaw.ca).
Build a standing review — every few years, or at any major corporate event — into the corporation’s governance calendar rather than treating the freeze as a document to be filed and forgotten.
STEP 08 OF 10
A freeze sets the stage; it does not by itself complete a succession or sale. When the family eventually sells the growth that has accrued to the new common shares, or transfers those shares again to the next generation, that later transaction runs on its own rules — including, where the buyer is a related purchaser corporation, the intergenerational business transfer conditions in ITA s. 84.1(2.31) and (2.32), covered separately in transferring a business to the next generation.
Do not assume the freeze itself satisfies those later conditions — it is a separate, earlier step that makes the later transfer more tax-efficient when it happens, not a substitute for planning that transfer properly when the time comes.
STEP 09 OF 10
ISED’s small-business data shows why the timing question is not abstract: on average, only 28.5% of goods-producing small businesses and 23.0% of services-producing small businesses created in Canada survive at least 21 years (ised-isde.canada.ca). A freeze does not change survival odds, but a founder who waits until a health event or a sudden market shift forces the succession question loses the years of planning runway that make a freeze’s benefits meaningful in the first place.
Treat the freeze conversation as part of an ordinary corporate governance cycle for a family business, not a special project triggered only once a sale is already being contemplated.
STEP 10 OF 10
Say a corporation is worth $2,000,000 today, with the founder’s original adjusted cost base at $50,000. A freeze exchanges the founder’s common shares for preferred shares fixed at that $2,000,000 value, electing under s. 85(1) at an amount at or near the $50,000 ACB — no gain triggered on the exchange itself. New common shares, issued to a family trust for a nominal amount, then absorb everything the business grows to beyond $2,000,000.
If the business is worth $5,000,000 by the time of an eventual sale, the founder’s frozen preferred shares still carry roughly $2,000,000 of value and roughly $1,950,000 of potential gain — unchanged from the freeze date. The $3,000,000 of growth in between now sits in the common shares the trust holds, available to be allocated among multiple family beneficiaries, each with their own $625,000 taxable-gain exemption room to apply against it when those shares are eventually sold.
The technical mechanics of a freeze — the s. 85 election, the PUC grind, the share terms — are well understood by any competent Canadian tax advisor and rarely the source of a real problem. What actually goes wrong, years later, is neglect: a trust deed nobody reviewed after a trustee moved provinces, a redemption value nobody updated, minute-book entries that stopped being kept current. None of that shows up until a sale process or a CRA review goes looking.
Build the review discipline in from the start, and the freeze holds up exactly as intended when it eventually matters.
No — it shifts who eventually pays tax on the growth, and often multiplies the number of people who can apply the lifetime capital gains exemption against it. The tax on that growth is still payable when the shares holding it are eventually disposed of.
Yes, but the freeze only protects value created after that point. A late freeze still stops further growth from compounding in the founder's hands, even though it does nothing for appreciation that has already occurred.
No — new common shares can go directly to family members instead of through a trust. A trust is commonly used because it defers the decision of exactly how much each family member eventually receives, but it adds its own ongoing administration and review obligations.
There is no statutory schedule, but a review at every major corporate event — a new family member entering or leaving the business, a material change in value, or a planned sale — plus a baseline check every few years, catches most of the drift that causes problems later.
A 30-minute call is enough to tell you whether AI pays for itself here.
Nobody publishes Canadian transaction data, so every valuation in this country quotes an American benchmark. We are building the Canadian one — multiples, asking-to-sale spreads and days on market, by sector and by city. Leave an email and you will see it first.
No pitch, no listings. One email when the first report lands.
