First-Time Buyers
Buying a Home With a Partner in Canada
Buying a home with a partner in Canada: how lenders assess your joint income, GDS/TDS ratios, title and down payment rules, plus HBP and FHSA strategies.
Buying a home with a partner in Canada means applying for one mortgage together, usually on the strength of both incomes, both credit histories, and a combined down payment. Lenders add your incomes to test affordability, but they also count every debt you each carry. Before you shop, agree on ownership, contributions, and what happens if the plan changes.
How Lenders Look at Two Borrowers
When two people apply for the same mortgage, most Canadian lenders treat it as one application with two incomes. Each borrower's credit history, income, and debts are reviewed, and the file is underwritten as a single household. That can increase your borrowing power, but only if both applicants clear the lender's bar. A strong income paired with a thin credit file, or a large vehicle loan on one side, can pull the whole application down.
Lenders measure affordability with two ratios. The gross debt service (GDS) ratio compares housing costs to gross household income. The total debt service (TDS) ratio adds every other debt payment, including credit cards, lines of credit, student loans, and car payments. Both borrowers' debts count. Exact ceilings vary by lender and by whether the mortgage is insured, so confirm them with your lender. You can see how the math works in GDS and TDS ratios explained.
You will also face the federal mortgage stress test. Federally regulated lenders qualify you at the higher of your contract rate plus two percentage points or the published qualifying-rate floor. Confirm the current floor with OSFI or your lender, because it changes. Read more in the Canadian mortgage stress test, explained. If your down payment is below 20 percent, the mortgage must generally be insured, typically through CMHC mortgage default insurance or another approved insurer.
Down Payment: Where the Money Comes From
Your combined down payment decides whether you need default insurance and how much you borrow. Canada sets a minimum down payment that scales with the purchase price, so higher prices require a larger percentage on the portion above the threshold. See minimum down payment rules in Canada for how the tiers work.
As first-time buyers, each of you may have access to tax-assisted savings. The First Home Savings Account (FHSA) lets eligible first-time buyers contribute and later withdraw for a qualifying home purchase. The RRSP Home Buyers' Plan (HBP) lets eligible buyers withdraw from an RRSP to buy or build a qualifying home, with repayment rules attached. Read the FHSA explained and the RRSP Home Buyers' Plan explained before you tap either account, and confirm current limits with the CRA.
Lenders want a clear paper trail. Savings, FHSA or RRSP withdrawals, and gifts from a family member usually work, and a gift is normally documented with a signed gift letter. Borrowed down payments face tighter rules, especially on insured mortgages, so ask before you rely on one.
Title and Ownership: Who Owns What
Being on the mortgage and being on title are two different things. The mortgage is the debt; title is ownership. Most couples put both names on both, but the structure matters.
- Joint tenancy usually means equal ownership with a right of survivorship, so one owner's share passes to the other on death.
- Tenancy in common lets you hold defined shares, which can be unequal, and each share can be left to someone else in a will.
Which one fits depends on your province, your contributions, and your estate plan. This is general information only, so have a real estate lawyer or notary prepare the paperwork and explain the consequences before you sign anything.
Qualifying Together: What Counts
Underwriting is not just about total income. Here is how lenders typically treat a two-borrower file.
| Item | How it is usually treated |
|---|---|
| Both incomes | Added together, subject to employment and income verification |
| Existing debts | Every borrower's minimum payments count toward TDS |
| Credit history | Both files are reviewed; the weaker one can limit approval or pricing |
| Down payment | Must be verifiable; joint accounts and documented gifts are common |
| Qualifying rate | The stress test rate applies to the entire mortgage balance |
Estimate your ceiling with how much you can borrow for a mortgage, then run the numbers again at a higher rate to see how a payment increase would feel.
If Only One of You Qualifies
Sometimes one applicant's credit or income keeps the file from being approved as a pair. Options include:
- Applying with only one borrower on the mortgage and title.
- Adding a guarantor or co-signer, if the lender allows it.
- Waiting to rebuild credit or pay down debt, then reapplying.
- Increasing the down payment to shrink the loan and improve the ratios.
A co-signer is not a small favour. It ties up that person's borrowing room and makes them responsible if payments stop. Only one person on title also means only one person owns the home, even if the other pays half the bills.
Agree Before You Sign
A co-ownership agreement or domestic contract sets expectations while everyone is on good terms. It typically covers who contributed what, how the mortgage and property taxes are split, who pays for repairs, and how a buyout is calculated if one of you wants out. It can also address what happens on separation or death.
Think through the exit before you enter. If you sell early and break a fixed-rate mortgage, you may owe an interest rate differential (IRD) penalty, which can be substantial on some lender formulas. If one partner buys the other out, that usually means refinancing and qualifying on a single income, which is a different test altogether.
Your Next Steps
Get a mortgage pre-approval so you shop with a real budget, and confirm the rate hold period before you make an offer. Gather income, down payment, and debt documents for both borrowers. Decide how you will hold title, and get that advice in writing. Budget beyond the down payment, because closing costs and land transfer tax apply in most provinces. Then compare lenders using the same amortization, term, and payment frequency so the quotes are genuinely comparable.
Frequently asked questions
Can we buy a house together if we are not married?
Yes. Marriage is not a requirement for a joint mortgage in Canada. Lenders assess both applicants' income, credit, and debts the same way whether you are married, common-law, or simply co-owning. What matters most is how you hold title and what your co-ownership agreement says, so get independent legal advice before you sign.
Does buying with a partner increase how much we can borrow?
Usually yes, because lenders add both incomes when calculating your GDS and TDS ratios. However, they also add both sets of debts, and a weak credit score on either file can reduce approval or raise pricing. The stress test still applies to the full mortgage, so you qualify at the higher of your contract rate plus two percentage points or the published floor.
Should both of us be on the title and the mortgage?
Most couples put both names on both, which matches ownership with responsibility. But being on the mortgage without being on title means you owe the debt without owning the home. Holding title as joint tenants or tenants in common also changes what happens on death or separation. A lawyer or notary can explain the options for your province.
What happens to the mortgage if we separate?
The mortgage does not change because your relationship did. You both remain responsible for the payments until the loan is paid off, refinanced, or the home is sold. Common outcomes are one partner buying the other out through a refinance, or selling and splitting the proceeds. Review your co-ownership agreement and speak with a lawyer.