Joint-Partner (Joint-Spousal) Trusts in Canada — Probate Planning for Couples

A retired couple in North Vancouver — he is 71, she is 68 — own their condo ($1.8M), a non-registered investment account ($1.2M), and have two adult children from his first marriage who live in Ontario. They want both of them to live comfortably for the rest of their lives, but they want what remains to go to his children, not to her sister (the default residuary beneficiary under her current will). Joint tenancy on the condo would defeat that plan — if he dies first, she gets sole ownership and can rewrite her will. A joint-partner trust gives both of them lifetime access while binding the second-death distribution. The fee math works at their estate size.

This guide walks through what a joint-partner trust is, how it differs from an alter-ego trust, and when the structure pays back for Canadian couples. For broader context, see our pillar guides on what probate is in Canada and how to avoid probate in Canada.

What a joint-partner trust is #

A joint-partner trust (sometimes called a joint-spousal trust or joint-and-survivor trust) is an inter-vivos trust that meets the requirements of section 73 of the Income Tax Act.^[1] The structural elements:

• Both spouses or common-law partners are settlors and lifetime beneficiaries.
• Both receive all income during their joint and successive lifetimes — no one else can take income or capital while either spouse is alive.
• The age threshold (commonly read as both spouses 65+ at settlement) is met.
• The trust assets pass to named remainder beneficiaries on the second death outside the probate file.

When the conditions are met, property transferred to the trust rolls in on a tax-deferred basis — the transfer itself doesn't trigger capital-gains tax. The trust holds the assets, both spouses live off them, and the trust's deemed-disposition event under section 104(4)^[2] is deferred to the second death.

How it differs from an alter-ego trust #

Three structural differences matter.

The lifetime beneficiary group. An alter-ego trust has one beneficiary during life (the settlor). A joint-partner trust has two (both spouses).

The deemed-disposition trigger. Alter-ego trusts hit the section 104(4) event on the single settlor's death. Joint-partner trusts hit it on the second of the two spouses to die — which can be many years later. For long-lived couples this is a meaningful capital-gains tax deferral, in addition to the probate-fee savings.

Probate avoidance on both estates. Alter-ego trusts avoid probate on one death. Joint-partner trusts avoid probate on both — the surviving spouse's eventual death also bypasses the probate file for the trust assets. In BC or Ontario on a $2M combined estate, the cumulative probate savings can be material.

How it differs from leaving everything in joint tenancy #

The instinctive alternative for older couples is joint tenancy with right of survivorship — adding the spouse to the home title, joint bank accounts, joint brokerage accounts. Joint tenancy is free and simple. But it doesn't replicate what a joint-partner trust does.

Joint tenancy hands the surviving spouse absolute ownership. Once the first spouse dies, the survivor owns the property outright and can do whatever they want with it — sell it, gift it, leave it to a new partner, rewrite their will to disinherit the deceased spouse's children. In blended families this is the most common reason a joint-partner trust is preferred.

Joint tenancy exposes the property to the joint partner's creditors. If one spouse is sued personally, jointly held assets can be drawn into the dispute. Trust-held assets typically aren't.

Joint tenancy doesn't protect the principal-residence exemption as cleanly as a properly drafted joint-partner trust (where the trust meets the relevant principal-residence-exemption qualifying conditions).

The trade-off is cost — $5,000 to $15,000+ to set up a joint-partner trust against zero out-of-pocket cost to add a spouse to a title. The trust earns back the difference where blended-family protection, creditor protection, or large probate-fee savings matter.

Where the math typically works #

Rough rule of thumb: joint-partner trusts pay back for couples with combined non-registered, non-joint estates above roughly $1,500,000 in provinces with uncapped probate fees.

A simplified BC illustration of combined probate savings if both spouses die with the trust intact, against a roughly equivalent simple-will scenario. BC probate fees are calculated under the Probate Fee Act at $6 per $1,000 of estate value between $25,000 and $50,000, plus $14 per $1,000 above $50,000, plus a flat $200 court filing fee^[4]:

The fee math alone takes a while to break even. Where joint-partner trusts genuinely earn their keep is the combination of fee savings, blended-family protection, privacy, and the long deferral of the deemed-disposition gains on the second death — especially for couples with a wide age gap or one significantly healthier spouse.

The blended-family use case #

The cleanest pattern for a joint-partner trust is a blended-family couple where:

• Each spouse has children from a prior relationship.
• Both spouses want the survivor to live comfortably for life.
• Both spouses want the remainder, on the second death, to go to their own children — not to the survivor's children or new partner.

A joint-partner trust accomplishes this contractually. The trust deed sets the lifetime beneficiaries (both spouses), the income entitlement during the successive lifetime (the survivor takes all income), and the remainder beneficiaries on the second death (each spouse's named children). Once the trust is signed, the survivor can't undo the second-death distribution — the trust deed binds them.

Joint tenancy or simple wills cannot replicate this. Once the first spouse dies under joint tenancy, the survivor owns the property outright and can leave it to anyone. A "mutual wills" agreement can create a similar binding effect, but is harder to enforce and frequently overlooked when the survivor remarries. The trust is the cleaner mechanism.

For related coverage of how mutual wills compare, see our guide on mutual wills in Canada.

The downsides — same as alter-ego trusts, plus some #

A joint-partner trust carries all the disadvantages of an alter-ego trust:

• Setup and ongoing legal/accounting cost
• Highest-marginal-rate taxation of trust income (no graduated-rate-estate concession)
• Loss of some principal-residence-exemption flexibility unless carefully structured
• The 21-year deemed-disposition rule applies, though the second death usually triggers section 104(4) first in practice

The joint-partner-specific disadvantages:

• Spousal cooperation required at settlement. Both spouses must agree to the structure and the remainder beneficiaries. In couples where one spouse is reluctant, the trust can't be settled.
• Trustee structure for the successive lifetime. Who runs the trust after the first death? Most structures name both spouses as initial co-trustees, with the survivor continuing alone after the first death. Successor trustees become important for the survivor's last years.
• Spousal-credit interactions. Trust income that would have been split for income-splitting purposes between spouses if held personally may not split as efficiently inside the trust.

What to ask before settling one #

• Have we run the math against simpler alternatives (joint tenancy on the home, multiple wills in Ontario, named beneficiaries on registered accounts)?
• Does our family pattern (blended families, dependent children, special-needs beneficiaries) actually require what the trust delivers?
• Who are the named remainder beneficiaries, and are we both comfortable with the list?
• Who is the trustee in each phase — joint, successive, after the second death?
• What's the exit plan if our circumstances change, including divorce?

Joint-partner trusts are a real planning tool for the right facts. They are not a default for every older couple.

For related structures, see alter-ego trusts and the broader strategy in how to avoid probate in Canada. For the probate-fee picture in your province, see our probate fee calculator.

What we focus on at It's Simple Will #

It's Simple Will builds wills and Life Discovery Kits for the bulk of Canadian estates — the ones where the joint-partner trust math doesn't pay back. For couples where it does, the residual estate still needs proper wills (for assets that weren't funded into the trust), executor appointments, and guardian appointments. See our pillar guides on what probate is in Canada and what does an executor do in Canada, and visit It's Simple Will to start your own document set.