Rising home prices have created a new reality in Canada’s major housing markets: increasingly, the path to homeownership for many people runs through partnership. Friends pooling resources, siblings buying investment properties together, adult children purchasing alongside parents — joint ownership between parties who aren’t spouses is becoming a meaningful segment of the Canadian market.

The motivations make complete sense. Two incomes are easier to qualify on than one. Shared down payments reach thresholds that individual savings might not. The carrying costs of homeownership become more manageable when split. But the structure of joint ownership between non-spouses introduces legal and financial complexities that simply don’t arise in the same way for married couples — and most joint buyers are woefully underprepared for them.

Two Ways to Hold Title Jointly: Understand the Difference

When two or more people purchase a property together in Canada, there are two primary ways to hold legal title. The choice between them has significant legal and estate implications:

Joint tenancy: Both owners hold an equal, undivided share of the property. The defining feature is the right of survivorship — if one owner dies, their interest in the property passes automatically to the surviving owner, bypassing the deceased’s will entirely. Joint tenancy is the default structure for married couples.

Tenants in common: Owners hold defined percentage shares of the property (which don’t need to be equal — one party might hold 60% and another 40%, reflecting their respective down payment contributions). There is no right of survivorship — each owner’s share passes through their estate according to their will. This is the typical structure for non-spousal joint owners.

For friends, siblings, or business partners buying together, tenants in common is almost always the more appropriate structure, because it allows each party to determine what happens to their share in the event of death, allows for unequal ownership percentages, and doesn’t create the legal complications that arise when a right of survivorship conflicts with the wishes of a deceased’s family.

The Co-Ownership Agreement: Non-Negotiable

If there is one piece of advice in this entire article that matters above all others, it is this: before you close on a jointly owned property with a non-spouse, have a lawyer draft a co-ownership agreement.

A co-ownership agreement is a private legal contract between the co-owners that governs how the property will be managed, what happens if one party wants to sell, what happens if one party can’t make their mortgage payments, how decisions are made, and how disputes are resolved. It does not replace the mortgage or the title documents — it sits alongside them as a binding private agreement between the parties.

Key provisions a co-ownership agreement should address:

Exit provisions: What happens if one co-owner wants to sell and the other doesn’t? A right of first refusal (the remaining owner has the option to buy the departing owner’s share at market value before it’s offered to a third party) is a common and sensible provision. A forced buy-sell (either party can trigger a process where one buys the other out at a specified valuation method) is another.

Contribution and expense sharing: How are mortgage payments split? Who pays property taxes, insurance, and maintenance costs? What happens if a major expense (roof replacement, furnace) arises? How are decisions about renovations made and funded?

Default provisions: What happens if one co-owner cannot make their portion of the mortgage payment? Can the other step in, and on what terms? What recourse exists?

Relationship change provisions: What happens if one co-owner gets married, has children, or wants to bring a new partner into the property? What if the relationship between co-owners deteriorates?

Without a co-ownership agreement, disputes are resolved by lawyers and, ultimately, by courts — an expensive and slow process that leaves both parties worse off than almost any negotiated outcome would have been.

How the Mortgage Works With Non-Spouse Co-Buyers

From a mortgage qualification standpoint, co-buyers who aren’t spouses are assessed as co-borrowers: both incomes are combined for qualification purposes, and both parties are fully liable for the full mortgage debt.

This means both parties’ credit profiles, debt service ratios, and employment situations are reviewed during underwriting. If one co-buyer has credit challenges or significant existing debts, it affects the joint application — potentially the rate, the lender options, or the qualifying amount.

One practical consideration that many joint buyers overlook: lender policies on non-spousal co-borrowers vary. Some lenders are completely comfortable with the structure; others apply additional scrutiny or restrictions. Working with a mortgage broker who knows which lenders are most amenable to non-spousal co-borrower applications saves time and improves outcomes.

Tax Implications of Joint Ownership

Joint property ownership between non-spouses has specific tax implications that differ from spousal co-ownership:

Principal residence exemption: Each property owner can claim one property as their principal residence for capital gains tax purposes. If both co-owners live in the jointly owned property as their primary home, the full principal residence exemption can apply to each party’s share of any eventual gain.

Rental income: If the property generates rental income — whether intentionally (the property is a pure investment) or incidentally (one owner rents a room) — each co-owner reports their proportional share of rental income on their personal tax return.

Future purchase implications: If you purchase a property jointly and later want to purchase your own primary residence, your status as a current property owner affects your first-time buyer eligibility for programs like the FHSA and HBP. Understand the implications before structuring the joint purchase.

Involving a tax accountant in the planning stage of a joint purchase — alongside a lawyer for the co-ownership agreement — is money well spent.

At RateFair, we’ve helped many Canadians structure joint mortgage financing for non-spousal co-purchases — finding the right lender, the right structure, and the right product for the shared situation. If you’re considering a joint purchase with a friend, sibling, or business partner, connect with the RateFair team today and get the financing right from the start.