The Canadian Income Tax Act doesn't let family trusts run indefinitely tax-free. Subsection 104(4) deems a personal trust to dispose of all its capital property at fair market value every 21 years from the date of settlement. For most family trusts holding growth shares of a successful private corporation, the 21st anniversary triggers a substantial deemed capital gain — and a substantial planning deadline.
Why the rule exists
Without the 21-year rule, trusts would be permanent tax-deferred vehicles — assets could accumulate in trust indefinitely, with capital gains never crystallizing. The 21-year rule says: every generation gets one 21-year pass; after that, the trust pays as if it had disposed of its property.
What the rule actually does
On the 21st anniversary of a personal trust's settlement, subsection 104(4) deems the trust to have disposed of each capital property at fair market value, with the trust then deemed to have reacquired the property at the same FMV. The deemed gain is taxable in the trust's hands at top trust rates (since 2016, family trusts no longer benefit from graduated brackets — they pay top marginal from dollar one).
For a trust holding $5M of accrued gain on growth shares of a private corporation, the 21-year deemed disposition produces a $5M capital gain at the trust level, with tax at top capital-gains rates of roughly $1.3M.
Three standard responses
Most families address the 21-year rule through one of three strategies, planned 1-3 years before the anniversary:
1. Rollout to beneficiaries (the standard play). Under Section 107(2) of the Income Tax Act, a personal trust can distribute its capital property to its Canadian-resident beneficiaries at the trust's cost base, deferring the gain into the beneficiaries' hands. The 21-year deemed disposition is avoided. Each beneficiary now holds the property directly, with the original cost base, and is responsible for tax on eventual disposition.
The rollout works only for capital property and only to Canadian-resident beneficiaries. Non-residents can't participate (they'd trigger immediate gain). Income earned by the trust must still be allocated and taxed in the year of rollout.
2. New trust settlement. If the family wants to keep the trust structure beyond year 21, the property can be distributed via Section 107(2) to a corporate beneficiary or to identified family members, who can then contribute the property to a newly-settled trust. The new trust starts its own 21-year clock. The structure is more complex than a simple rollout and requires careful design to avoid attribution under Section 75(2) and the new-trust trust-contribution rules.
3. Pay the gain. If the trust holds property that wouldn't benefit from a rollout (e.g., the family wants the property to remain in trust because the beneficiaries shouldn't yet have direct ownership), the family pays the 21-year capital-gains tax at the trust level. Sometimes the right answer — especially when claiming the LCGE on QSBC shares can shelter part of the gain.
The rollout to a holdco beneficiary
A variation on the rollout strategy is distributing the trust's property to a corporate beneficiary owned by the same family. The corporate beneficiary inherits the property at cost base. The trust's 21-year clock resets. The new corporate beneficiary can later distribute the property (or shares of it) to individual family members as needed.
The corporate-beneficiary route preserves more long-term flexibility than a direct rollout to individuals — the corporate structure can hold the property indefinitely without facing the 21-year rule (corporations don't have a 21-year deemed disposition). The trade-off is the corporate-passive-investment cost.
Planning timeline
A typical 21-year planning timeline starts 18-24 months before the anniversary:
- Year -2: Confirm the trust's settlement date. Identify all property held by the trust. Run a valuation. Determine which assets benefit from rollout vs. paying the gain.
- Year -1: Identify the rollout recipients. If they include adult children who'll receive directly, confirm they're Canadian residents and ready to take ownership. If a corporate beneficiary is to be used, incorporate it and add to the trust deed if not already a beneficiary.
- Year 0: Execute the Section 107(2) rollout in the right tax year. File the trust's T3 and the beneficiaries' T1s correctly.
Common mistakes
The most common mistakes on 21-year planning:
- Letting the deadline slip by one day. The 21-year rule applies to the exact 21st anniversary; tax-effective rollouts must be COMPLETE by that date.
- Distributing to non-resident beneficiaries (triggers immediate gain rather than rollout).
- Distributing property the trust doesn't actually own (paper trail mistakes).
- Failing to address Section 75(2) attribution where the original settlor is still alive and the trust deed has flawed reversion-prevention language.
How we work the file
21-year files run as fixed-fee engagements typically starting 18 months before the anniversary. We confirm the trust's status, model the rollout vs. wind-up vs. pay-the-tax options, execute the chosen strategy, and handle the related filings. For trusts holding QSBC shares, we coordinate with the LCGE-multiplication strategy. The total cost is normally a small fraction of the tax saved.