A $120,000 TFSA can turn into a $127,000 payout or a $120,000 payout plus a $7,000 taxable gain, depending entirely on what box the account holder checked seven years earlier. That difference, tax-free versus taxable post-death growth, comes down to whether the surviving spouse is named as a Successor Holder or merely as a Designated Beneficiary.

Most Canadians don't know the distinction exists. Both designations bypass probate. Both name the spouse. The legal outcome, though, is completely different.

Why Successor Holder Designation Shelters Post-Death Gains

A Successor Holder takes over the TFSA as if they were the original owner. The account continues in their name. Growth that accrues between the date of death and the date the assets are transferred remains tax-free. If the account grows by $7,000 in the months it takes to settle the estate, that $7,000 stays sheltered.

This designation is available only to spouses or common-law partners. It bypasses the contribution-room problem entirely: even if the surviving spouse has already maxed out their own TFSA (the cumulative room since 2009 is $109,000 as of 2026), they can absorb the deceased spouse's account without penalty. They simply step into the deceased's position.

The paperwork is minimal. No forms to the CRA. No deadlines. The account continues.

What Happens When a Spouse Is Named Beneficiary Instead

A Designated Beneficiary receives the fair market value of the TFSA as of the date of death, tax-free. Any growth after that date is taxable income to the beneficiary.

In practice, this creates a gap. The account holder dies in March. The estate takes six months to settle. The TFSA earns interest or capital gains during those six months. The beneficiary receives the full payout but must report the post-death gain on their tax return.

For a spouse named as beneficiary rather than successor, there is a workaround: they can file CRA Form RC240 (Designation of an Exempt Contribution) to move the balance into their own TFSA tax-free. But this only works if they have enough contribution room, and the transfer must happen by December 31 of the year following the death. Miss that deadline and the tax shelter is gone.

That deadline is not theoretical. It catches people regularly. A $150,000 TFSA left to a spouse who has $25,000 in room means $125,000 will be taxed if they cannot shelter it in time.

When Beneficiary Designation Makes Sense

Naming a non-spouse beneficiary, adult children, siblings, parents, always results in a taxable gain on post-death growth. There is no successor-holder option for non-spouses under Canadian law.

The advantage of a direct beneficiary designation is speed. The payout bypasses probate entirely, which in Ontario means avoiding the 1.5% Estate Administration Tax on amounts above $50,000. A $200,000 TFSA saves roughly $3,000 in probate fees by naming a beneficiary directly on the account rather than letting it fall into the estate.

For minor children, though, this shortcut creates a second problem: the provincial Public Guardian and Trustee will hold the funds until the child reaches 18 or 19, depending on the province. Many estate planners prefer routing those assets through a trust in the Will instead.

The Quebec Exception

Quebec residents cannot name beneficiaries directly on most TFSA contracts, except for insurance-based segregated funds. Under Quebec civil law, the designation must be made in the Will. Failing to address the TFSA explicitly in the Will means the account defaults to the general estate, where it is subject to probate and loses the liquidity advantage of a direct designation.

The One-Page Fix

Most financial institutions offer a beneficiary-designation form. Spouses should confirm the form has a specific line for "Successor Holder," not just "Beneficiary." If the form does not distinguish, call the institution and ask for the language that makes the spouse a successor rather than a beneficiary. That distinction alone can shelter five or six figures of post-death gains.