The Spousal Rollover at Death: How Canada Defers Capital Gains Tax for Surviving Spouses

Canada's tax rules treat death as a deemed sale of all capital property — a rule that can create a large tax bill on the deceased's final return. The spousal rollover is the most significant exception to that rule. When property passes to a surviving spouse or common-law partner, the tax on any accrued capital gains is automatically deferred — often for decades.

Understanding how the spousal rollover works — and when it might not be the right choice — is essential for anyone doing estate planning in Ontario. This article covers the mechanics, the limits, the RRSP dimension, and the sometimes-overlooked option to elect out.

The Basic Rule: Automatic Rollover to a Spouse

Under the Income Tax Act, when a person dies and leaves capital property to a surviving spouse or common-law partner, the property transfers at its adjusted cost base (ACB) rather than at fair market value. Because the deemed proceeds equal the cost, there is no capital gain — and no tax — on the terminal return.

The rollover is automatic by default. The estate trustee doesn't need to do anything to trigger it; they would need to actively elect out of it.

Who Qualifies?

The rollover applies to:

• Legally married spouses recognized under Ontario and federal law
• Common-law partners — defined under the Income Tax Act as persons who have lived together in a conjugal relationship for at least 12 continuous months, or who are the natural or adoptive parents of a child together

The rollover does not apply to:

• Children (adult or minor)
• Siblings or other relatives
• Unmarried partners who don't meet the common-law definition
• Trusts for the benefit of a spouse, unless structured as a qualifying spousal trust

How the Rollover Works in Practice

Suppose a person dies holding shares with a fair market value of $500,000 and an ACB of $100,000. Without the rollover, a $400,000 capital gain would be reported on the terminal return, generating a significant tax bill.

With the spousal rollover, the shares transfer to the surviving spouse at the $100,000 ACB. The surviving spouse now holds shares worth $500,000 but with a cost of only $100,000. The $400,000 gain is deferred — it will be taxed when the spouse eventually:

• Sells the shares
• Gifts them to someone other than their own spouse
• Dies (at which point the deemed disposition applies again)

The rollover doesn't eliminate the tax — it defers it to the next taxable event.

The Spousal Trust Option

Rather than transferring property outright to the surviving spouse, a will can direct that assets pass into a spousal trust (also called a testamentary spousal trust). If the trust meets specific conditions under the Income Tax Act, the rollover still applies.

A spousal trust is useful when:

• The deceased wants to ensure the surviving spouse is provided for but wants to control the ultimate destination of the assets (e.g., to children from a prior relationship)
• The surviving spouse has capacity issues or creditor concerns

The trust must be structured carefully. The surviving spouse must be entitled to receive all of the trust's income during their lifetime, and no one else can receive capital from the trust while the spouse is alive.

RRSPs and RRIFs: A Parallel Rule

Registered plans (RRSPs and RRIFs) are not capital property, so the standard rollover doesn't apply. Instead, a separate rule allows the full value of an RRSP or RRIF to be transferred to a surviving spouse's RRSP or RRIF tax-free, provided:

• The surviving spouse is named as the direct beneficiary on the plan, or
• The plan proceeds flow through the estate and the surviving spouse is the residuary beneficiary

If neither condition applies, the full RRSP/RRIF value is included as income on the terminal return — a common and expensive mistake.

As of writing, RRSP/RRIF rollover rules require the transfer to be completed within a specific period after death. Confirm timing requirements with the CRA or an accountant.

Electing Out of the Spousal Rollover

The automatic rollover can be declined — partially or fully — by the estate trustee on the terminal return. Why would you do this?

Reasons to Elect Out

Using capital losses on the terminal return. If the deceased has capital losses (from other assets), these losses can only offset capital gains. If the rollover eliminates all the gains, those losses go unused. Electing out triggers capital gains on some assets, which the losses can then shelter.

Taking advantage of the lifetime capital gains exemption. If the deceased held qualifying small business shares or farm/fishing property, their lifetime capital gains exemption may shelter some or all of the gain. Electing out allows the exemption to be used rather than deferring a gain to the spouse who may not qualify for it.

Stepping up the ACB for the spouse. If the property transfers at fair market value, the surviving spouse inherits a higher ACB. This reduces the capital gain they'll owe when they eventually sell — at the cost of paying some tax now.

The Timing Constraint

The election to opt out must be made on the terminal return. Once filed, changing it requires an adjustment request. Work with an accountant before filing to run the numbers.

What Happens When the Surviving Spouse Dies?

When the surviving spouse eventually dies, the deferred gain becomes taxable on their terminal return. The same deemed disposition rules apply. If that second estate is also large, careful planning — including a spousal trust, insurance, or charitable giving — can help manage the tax.

Frequently asked questions