One of the most useful ideas in tax planning is also one of the simplest: money has a time value. A dollar of tax you can defer to a future year is cheaper than a dollar paid today, because inflation erodes the future dollar's buying power and because the money you keep can be invested in the meantime. Canadian tax law contains several mechanisms built around this idea. This guide covers three of the most important — tax-free rollovers, the capital gains reserve, and the estate freeze.
Tax-free rollovers
Ordinarily, when property is transferred to a related person, corporation, or trust, the tax system treats it as a disposition at fair market value, which can trigger a capital gain even though nothing was sold for cash. A rollover defers that taxable event. Instead of being taxed now at fair market value, the property can pass at its existing cost base, so the gain is realized only when the recipient eventually disposes of it.
Several rollovers appear repeatedly in planning:
- The subsection 73(1) spousal rollover lets capital property pass between spouses (or to a spousal trust, or a former spouse in settlement of marital rights) on a tax-deferred basis. It is automatic unless you elect out. Note that attribution rules can apply, so income or gains on rolled-over property may be taxed back to the transferor.
- The spousal rollover on death under subsection 70(6) automatically transfers a deceased's assets to a surviving spouse at cost base, deferring the tax that the deemed disposition at death would otherwise trigger. No election is required, though electing out can sometimes be the better move (see below).
- The section 85 rollover lets an individual, partnership, trust, or corporation transfer eligible property to a taxable Canadian corporation at an elected amount, filed on Form T2057 (or T2058 for partnerships). It is the workhorse for incorporating a sole proprietorship, inserting a holding company, and building estate freezes. The elected amount sets both the transferor's proceeds and the corporation's cost; it cannot exceed fair market value and generally cannot fall below cost. The transferor must take back at least one share, and any non-share consideration ("boot") above the elected amount triggers immediate gain — so keep boot at or below the cost of the transferred property if you want full deferral.
A caution on section 85: it can create double taxation if, for example, the corporation quickly sells the asset while the shareholder simultaneously sells their shares. These transactions reward careful structuring.
The capital gains reserve
Sometimes you sell a capital property at a gain but do not receive all the money at once — the buyer pays over several years. Paying the full capital gains tax up front, before you have the cash, can be a hardship. The capital gains reserve, claimed on Form T2017 with your T1 return, lets you spread the gain over the period you are paid, up to a maximum of five years.
For instance, on a $500,000 gain paid out at $100,000 a year over five years, the reserve lets you report roughly $100,000 of gain each year rather than the whole amount at once. One word of caution: if your income is likely to rise over the deferral period, spreading the gain into higher-bracket years can cost more than reporting it all in the year of sale. Model it before you rely on it.
The estate freeze
The estate freeze is a succession tool that takes a snapshot of a business owner's share value at a point in time and "freezes" it, so all future growth accrues to the next generation rather than to the owner. The owner exchanges their common shares for fixed-value preferred shares (often using section 85 or section 86), and the corporation issues new common shares — typically worth a nominal amount — to children or a family trust. Because the new shares start at nominal value, there is no taxable event when they are issued.
From there, all future growth in the business accrues to the next generation's common shares. The owner's preferred shares stay frozen, capping the capital gains tax that will arise on the owner's death. The tax on the post-freeze growth is paid much later, when the next generation eventually disposes of their shares.
The deferral can be large. If an asset is expected to grow by $1,000,000 over an owner's remaining life, freezing the estate shifts roughly $250,000 of eventual capital gains tax off the owner's terminal return and onto the next generation's much later disposition — and paying $250,000 decades from now is far cheaper, in real terms, than paying it at death.
Two practical notes. First, the CRA may audit a freeze, and very low valuations attract attention, so support the valuation — ideally with a certified business valuator — and consider a price-adjustment clause as a backstop (which requires that the original valuation was arrived at by a fair and reasonable method). Second, revisit the plan every few years; tax laws, family circumstances, and goals all change.
A related move: electing out of the spousal rollover
The automatic spousal rollover on death is usually helpful, but not always. If the deceased had unused room in the Lifetime Capital Gains Exemption (LCGE), letting everything roll over at cost wastes that room. The deceased's representative can elect, share by share, to transfer some shares at fair market value — using up the LCGE and stepping up the surviving spouse's cost base — while other shares roll over at cost. Done well, this can shelter a gain on the deceased's final return and reduce the survivor's eventual gain to near zero. It is a reminder that deferral is not always the goal; sometimes realizing a sheltered gain now beats deferring a taxable one.
Bringing it together
Rollovers, reserves, and freezes all rest on the same insight — that controlling when tax is paid is often as valuable as controlling how much. They are also technical and timing-sensitive, with anti-avoidance rules layered around each. For the owner-manager context these tools fit into, see our guide on owner-manager tax savings; for the deduction fundamentals, see deducting business expenses the right way.
This guide draws on Dale Barrett's book Pay WAY Less Tax!, a plain-language collection of tax-saving tips and strategies for Canadians. The book is general information, not legal advice; the rules change often, so confirm the current treatment for your own situation before acting.