A family trust is one of the most flexible structures in Canadian private-corporation and estate planning, but it is not permanent in the way many founders assume. Built into the Income Tax Act is a clock that starts ticking the day a trust is settled: under subsection 104(4), a personal trust is deemed to dispose of its capital property at fair market value every 21 years, whether or not anything has actually been sold. The accrued gain is taxed inside the trust at the top marginal rate. For a trust that holds appreciated private-company shares, a portfolio, or real estate, an unplanned 21st anniversary can produce a tax bill measured in hundreds of thousands of dollars.
The good news is that the 21-year rule is one of the most foreseeable events in tax planning. The anniversary date is fixed and known from the outset, and the law provides a tax-deferred way out if the trustees act in time. This guide explains how subsection 104(4) works, why it matters, the options available before the anniversary (a section 107(2) rollout of property to capital beneficiaries at cost, the non-resident trap in subsection 107(5), a refreeze, and a wind-up), how the rule interacts with the Lifetime Capital Gains Exemption and the attribution rules, and a concrete planning timeline.
How the 21-year rule works
Subsection 104(4) of the Income Tax Act deems most personal trusts to have disposed of, and immediately reacquired, their capital property at fair market value on a series of 21-year anniversaries. Companion rules in subsection 104(5) (depreciable property) and 104(5.2) (resource property) do the same for those asset classes. The first deemed disposition normally falls on the 21st anniversary of the day the trust was created; the cycle then repeats every 21 years.
Because the disposition is deemed rather than real, the trust does not receive any cash with which to pay the resulting tax. The accrued capital gain is realized inside the trust and, unless the income is allocated out to beneficiaries, it is taxed in the trust at the top combined federal-provincial marginal rate. The capital gains inclusion rate that applies is the rate in force at the time. The federal government's 2024 proposal to raise the inclusion rate to two-thirds was deferred and then cancelled in 2025, so the inclusion rate in force in 2026 remains one-half. The trust's adjusted cost base in the property is bumped up to fair market value on the deemed reacquisition, so the same accrued gain is not taxed twice — but the cash cost of the deemed disposition lands now.
A few structural points matter:
- It is the trust's anniversary that counts, not the beneficiary's age. The "21 years" is the age of the trust, not of any child or grandchild. A trust settled in 2005 reaches its first deemed disposition in 2026 regardless of who the beneficiaries are.
- Spousal and certain other trusts run on a different clock. A qualifying spousal or common-law partner trust, an alter ego trust, or a joint partner trust has its first deemed disposition triggered by the death of the relevant individual rather than on a 21-year cycle, after which the ordinary 21-year cycle resumes.
- The gain is the trust's, not the beneficiaries'. Unless the trustees take a positive step before the anniversary, the beneficiaries' cost base in their interests does not help — the tax is computed on the trust's accrued gains in the underlying property.
Why it matters
The practical problem is liquidity and rate. A discretionary family trust that holds the growth shares issued in an estate freeze often has little or no cash. If those shares have appreciated from a nominal subscription price to several million dollars, the deemed disposition crystallizes the entire accrued gain at once, taxed at the top rate, with no sale proceeds to fund the bill. Left unmanaged, the trustees may be forced to redeem shares, borrow, or sell assets simply to pay the tax.
The rule also collapses, in a single year, gains that the family may have intended to realize gradually and tax-efficiently across multiple beneficiaries over time. That is why the 21-year rule is properly treated not as a deadline to dread but as a scheduled planning milestone — one whose date is known the moment the trust is created.
The options before year 21
There are four broad responses, which are not mutually exclusive. The right combination depends on who the beneficiaries are, where they live, what the trust holds, and the family's longer-term succession goals.
Option 1 — Roll the property out to capital beneficiaries under s.107(2)
The most common answer is the subsection 107(2) rollout. Subsection 107(2) generally allows the trustees of a Canadian-resident personal trust to distribute the trust's capital property to a capital beneficiary, in satisfaction of all or part of that beneficiary's capital interest, on a tax-deferred basis. The property moves out at the trust's cost amount rather than at fair market value, so no deemed gain is realized. The beneficiary takes the trust's adjusted cost base and is taxed only on a later actual disposition.
Executed before the 21st anniversary, a s.107(2) rollout takes the appreciated property out of the trust so that there is nothing left for subsection 104(4) to bite on the anniversary. The trustees must have the discretionary power to make capital distributions, the recipients must be capital beneficiaries under the trust deed, and the mechanics (resolutions, share transfers, T3 filings) must be documented properly.
Option 2 — Mind the non-resident trap in s.107(5)
The s.107(2) rollover is not available across the board. Subsection 107(5) overrides the tax-deferred rollout where property is distributed to a non-resident beneficiary. In that case the trust is generally deemed to dispose of the property at fair market value — triggering exactly the gain the rollout was meant to defer — except for limited categories such as taxable Canadian property (broadly, Canadian real estate and certain resource and timber property). If a family trust has children or grandchildren who have emigrated, distributing private-company shares to them will not roll over; it will crystallize the gain.
The Canada Revenue Agency has also challenged structured arrangements designed to circumvent subsection 107(5) using the general anti-avoidance rule, so planning that tries to route property to non-residents indirectly carries real risk. Where non-resident beneficiaries are involved, the trustees should generally roll out to the Canadian-resident beneficiaries and address the non-residents through other means.
Option 3 — Refreeze the underlying structure
Where the trust holds growth shares from an earlier freeze, a refreeze can be combined with a rollout. The trustees roll the existing shares out to the resident beneficiaries (or to a new holding company they own) under s.107(2) at cost, and a fresh freeze is implemented at the operating-company or holdco level so that future growth accrues to a new structure. This resets the 21-year clock on the new arrangement and preserves the original freeze planning. A refreeze also offers a chance to update the structure for changes in the family, the business, and the tax rules since the trust was settled.
Option 4 — Wind up the trust
If the trust has served its purpose, the cleanest answer may be to distribute all remaining capital property to the resident capital beneficiaries under s.107(2) and wind the trust up before the anniversary. A wind-up ends the trust, avoids the deemed disposition entirely, and removes ongoing T3 filing obligations. The trade-off is the loss of the trust's flexibility — creditor protection, control through trustees, and the ability to sprinkle income among beneficiaries — so a wind-up suits families who no longer need those features.
Interaction with the LCGE and attribution
The 21-year planning window can be a useful moment to access the Lifetime Capital Gains Exemption (LCGE) where the trust holds Qualified Small Business Corporation (QSBC) shares. The LCGE limit for QSBC shares was raised to $1.25 million for dispositions after June 24, 2024 and resumed indexing for 2026, reaching $1,275,000 for the 2026 year. Under section 110.6, a capital gain on QSBC shares that is realized by a personal trust and allocated and designated to an individual resident beneficiary can let that beneficiary claim their own LCGE against the gain — so a trust with several qualifying beneficiaries may multiply the exemption across the family. Whether the trustees choose a tax-deferred rollout (which defers the gain) or a deliberate crystallization (which uses the LCGE now) depends on the timing of an expected sale and each beneficiary's exemption room.
The attribution rules must be checked at the same time. Where a trust was funded by a contributor and income or gains are paid to that contributor's spouse or minor children, sections 74.1 through 75(2) can attribute the income back to the contributor. Subsection 75(2) in particular can attribute trust income and capital gains back to a person who transferred property to the trust on terms that allow the property to revert to them or pass on their direction. A rollout or wind-up must be structured so it does not inadvertently trigger attribution, and so the Tax on Split Income (TOSI) rules are respected on any income distributions.
A planning timeline and process
The recurring lesson with subsection 104(4) is that the work has to start years before the anniversary, not months. A workable framework:
- 5+ years out — confirm the date and inventory the trust. Identify the exact 21-year anniversary from the settlement date. List every capital asset, its cost amount, and its current fair market value. Estimate the deemed-disposition tax if nothing is done.
- 3-4 years out — map the beneficiaries. Confirm who the capital beneficiaries are, where each is resident, and which of them could receive a s.107(2) rollout. Flag any non-resident beneficiaries who would trigger subsection 107(5). Review the trust deed for the necessary distribution and discretionary powers.
- 2-3 years out — choose the strategy. Decide among a rollout to resident beneficiaries, a refreeze, a partial crystallization to use the LCGE, a wind-up, or a combination. Obtain a defensible valuation of any private-company shares — valuation work takes time and the figure drives everything.
- 12-18 months out — implement. Prepare trustee resolutions, share-transfer documents, and any refreeze reorganization. Confirm the QSBC status of shares if the LCGE is in play. Check the attribution and TOSI consequences of the chosen path.
- Before the anniversary — complete and document. Execute the distributions or reorganization, update the corporate records and share registers, and file the trust's T3 return reporting the distributions. Keep the valuation, resolutions, and tax analysis on file.
Worked example
Suppose the Tremblay Family Trust was settled in 2005 as part of an estate freeze. The trust holds common growth shares of the family operating company (a CCPC) that were subscribed for a nominal $100. By 2026 those shares are worth $3,000,100, so the accrued gain is $3,000,000. The trust's first 21-year deemed disposition falls in 2026. The three capital beneficiaries are two adult children resident in Ontario and one child who emigrated to the United States.
If the trustees do nothing, subsection 104(4) deems the trust to dispose of the shares at the $3,000,100 fair market value on the anniversary. With a $3,000,000 capital gain and a one-half inclusion rate, the trust has a $1,500,000 taxable capital gain. Taxed inside the trust at a roughly 53% top Ontario rate, that is approximately $795,000 of tax — payable with no sale and no cash in the trust.
If the trustees roll the shares out under s.107(2) before the anniversary, the shares can be distributed to the two resident children at the trust's $100 cost amount. No gain is realized on the rollout; each child inherits a share of the low cost base and is taxed only on a future actual sale. The deemed disposition is avoided on the rolled-out shares.
The non-resident child is the trap. Distributing shares to the U.S.-resident child would not roll over: subsection 107(5) would deem a fair-market-value disposition of that one-third interest, crystallizing roughly $1,000,000 of gain and about $265,000 of tax. The trustees instead roll out only to the two resident children and address the third child's interest separately. If the shares qualify as QSBC shares, the trustees might also crystallize a portion of the gain on the resident children's shares to use part of each child's $1,275,000 LCGE — converting a forced top-rate tax into largely exempt gains — provided the QSBC tests and attribution rules are satisfied.
How Barrett Tax Law approaches the 21-year rule
Our work on a 21-year deemed disposition starts well before the anniversary. We confirm the exact anniversary date from the trust's settlement, inventory the trust's capital property and cost amounts, and model the deemed-disposition tax against the alternatives. We then map the residency of every capital beneficiary to identify any subsection 107(5) exposure, review the trust deed for the distribution and discretionary powers needed to roll property out under s.107(2), and coordinate any refreeze, LCGE crystallization, or wind-up with the family's broader succession plan. Where a valuation of private-company shares is needed, we arrange it early so the numbers are defensible. The aim is to convert a fixed statutory deadline into a deliberate, documented decision rather than a surprise tax bill.
If your family trust is approaching its 21st anniversary, or you are not sure when that date falls, contact Barrett Tax Law for a free consultation to review the structure and the options while there is still time to act.
Frequently asked questions
When exactly does the 21-year deemed disposition happen?
The first deemed disposition under subsection 104(4) of the Income Tax Act generally falls on the 21st anniversary of the day the trust was created, and then repeats every 21 years. The date is fixed by the settlement date, so it is known from the outset and does not depend on the age of any beneficiary. Different rules apply to certain trusts: a qualifying spousal or common-law partner trust, an alter ego trust, or a joint partner trust has its first deemed disposition triggered by the death of the relevant individual rather than on the 21-year cycle, after which the ordinary 21-year cycle resumes. Because the date is so predictable, the practical question is not whether the anniversary will arrive but whether the trustees act in time to manage it. Planning ideally starts several years before the anniversary, not in the final months.
How can a trust avoid tax on its 21st anniversary?
The most common approach is a tax-deferred rollout under subsection 107(2) before the anniversary. Subsection 107(2) generally lets the trustees of a Canadian-resident personal trust distribute capital property to a capital beneficiary, in satisfaction of that beneficiary's capital interest, at the trust's cost amount rather than at fair market value. Because the property leaves the trust at cost, no gain is realized, and there is nothing left for subsection 104(4) to tax on the anniversary. The beneficiary inherits the trust's adjusted cost base and is taxed only on a later actual sale. The trustees need the discretionary power to make capital distributions, the recipients must be capital beneficiaries under the deed, and the steps must be documented with resolutions and T3 filings. Other options include refreezing the structure, using the Lifetime Capital Gains Exemption on a crystallization, or winding the trust up.
What happens if a beneficiary is a non-resident of Canada?
Non-resident beneficiaries are the main trap in 21-year planning. Subsection 107(5) of the Income Tax Act overrides the tax-deferred rollout in subsection 107(2) where property is distributed to a beneficiary who is not resident in Canada. Instead of rolling out at cost, the trust is generally deemed to dispose of the property at fair market value, triggering the accrued gain immediately, with limited exceptions for taxable Canadian property such as Canadian real estate and certain resource and timber property. So distributing private-company shares to an emigrated child will not defer the gain; it will crystallize it. The Canada Revenue Agency has also challenged arrangements designed to route property to non-residents indirectly using the general anti-avoidance rule. Where non-resident beneficiaries exist, trustees generally roll out to the resident beneficiaries and address the non-residents' interests through other planning.
What is the capital gains inclusion rate that applies to the deemed disposition in 2026?
The deemed disposition under subsection 104(4) realizes a capital gain inside the trust, and that gain is multiplied by the capital gains inclusion rate in force at the time. The federal government proposed in 2024 to raise the inclusion rate from one-half to two-thirds, but that change was first deferred and then cancelled in 2025, so it never became law. The inclusion rate in force in 2026 remains one-half. That means a $3,000,000 accrued gain produces a $1,500,000 taxable capital gain, which is then taxed inside the trust at the top combined marginal rate (roughly 53% in Ontario) unless the income is allocated out to beneficiaries. Because the disposition is deemed rather than an actual sale, the trust receives no cash to pay the tax, which is precisely why planning before the anniversary matters so much.
Can the 21-year rule planning be combined with the Lifetime Capital Gains Exemption?
Yes, where the trust holds Qualified Small Business Corporation (QSBC) shares. Under section 110.6, a capital gain on QSBC shares realized by a personal trust and allocated and designated to a Canadian-resident individual beneficiary can allow that beneficiary to claim their own Lifetime Capital Gains Exemption against the gain. The LCGE limit for QSBC shares was increased to $1.25 million for dispositions after June 24, 2024 and resumed indexing for 2026, reaching $1,275,000. A trust with several qualifying beneficiaries may therefore multiply the exemption across the family. Approaching the 21-year anniversary can be a natural moment to crystallize part of the gain and use that exemption room, rather than simply deferring everything through a rollout. The QSBC tests, the attribution rules, and the Tax on Split Income rules all have to be satisfied, so the analysis should be done well before the anniversary.
Should we just wind up the trust before it turns 21?
Winding up can be the cleanest answer for a trust that has served its purpose. The trustees distribute all remaining capital property to the Canadian-resident capital beneficiaries under subsection 107(2) at cost, then wind the trust up before the anniversary. This avoids the deemed disposition entirely and ends the ongoing T3 filing obligations. The trade-off is that you lose the features that made the trust useful: creditor protection, centralized control through the trustees, and the ability to allocate income among beneficiaries over time. A wind-up therefore suits families who no longer need that flexibility. For families who still want to keep growth in a trust structure, a refreeze combined with a rollout often makes more sense, because it preserves the planning while resetting the 21-year clock on a fresh arrangement. The right choice depends on the family's longer-term succession goals.