Ontario and B.C. mortgage delinquencies climb as joint borrowing masks what single buyers can't afford

The Toronto borrower who added her sister to the mortgage last year proved the income. When two borrowers pool their income, they can qualify for a price point neither could reach alone. Alone, neither of them cleared it. Together, they did. Six months ago the sister lost her contractor position and couldn't replace the income fast enough. Now both credit scores are damaged, and the property itself sits in forbearance.

Joint mortgages used to be couples. Then it was couples plus a parent. Now Equifax is watching titles with three, sometimes four names, particularly in the Greater Toronto Area and Greater Vancouver Area, where the entry threshold has climbed past what most individual salaries can justify. The national delinquency rate for mortgages 90 days or more past due remains below historical peaks, but Ontario and British Columbia have posted double-digit percentage increases year over year. The divergence is regional, and the cause is structural.

The mechanics behind the mask

The Office of the Superintendent of Financial Institutions holds the stress test at the contract rate plus 200 basis points or 5.25 percent, whichever is higher. A buyer taking a $600,000 mortgage at 4.8 percent must prove they can service payments at 6.8 percent. For a household earning $95,000, that bar is too high. For two households pooling $142,000, it clears. The system reads this as de-risking. It isn't. It's risk distribution across more people who each carry less margin if something goes wrong.

When one borrower in a trio loses income, the entire arrangement destabilizes. Mortgage payments don't scale down. The remaining borrowers either cover the shortfall from savings that were already thin, or they all fall behind together. One missed payment hits three credit files. One default triggers three insolvency cases. The "safety in numbers" framing inverts: the risk isn't smaller, it's shared, and shared risk in housing rarely stays contained to the people who signed.

What forbearance hides

Canadian banks have been aggressive about extending amortizations and restructuring payments to avoid formal foreclosures. A stressed borrower who took 25 years in 2021 can sometimes push the term to 30 or 35 years at renewal, buying time with lower monthly payments. That keeps the household current on paper while locking them into paying interest on a principal that barely moves. Equifax's delinquency figures capture only what has already broken. The households currently being restructured don't show up in the data until restructuring stops working.

In markets where home prices have flattened or declined slightly, joint borrowers with high loan-to-value ratios have almost no exit room. Selling the property to relieve the strain means splitting whatever equity remains after realtor fees and closing costs among three or four people. If the market hasn't appreciated enough to cover transaction costs, there is no equity to split. The property becomes a trap, not an asset.

The lag hasn't finished

Mortgage stress is a lagging indicator. The cohort that locked in discounted five-year fixed rates below 1.5 percent in 2021 is renewing now at rates between approximately 4.1 and 5.1 percent. September 2026 marks the midpoint of that renewal wave, not the end. The Equifax data showing elevated delinquencies in Ontario and B.C. reflects only the first round of payment shock. The households that scraped through the first renewal by adding a third or fourth borrower to the title are now carrying maximum leverage into a period where employment stability is not guaranteed and interest rate relief remains uncertain.

Joint borrowing passes the stress test but does not solve the cash flow problem, the job loss problem, or the interpersonal conflict problem that comes with owning a $900,000 asset among people who did not plan to share a roof or a liability permanently. The stress showing up in the data now will compound.