The Middle Falls Last

The Inversion

The conventional understanding of mortgage stress follows a simple hierarchy: the weakest borrowers fall behind first, then the pressure migrates upward if conditions worsen. Subprime at the bottom, prime at the top, and near-prime in between as a buffer zone that absorbs some turbulence but generally holds.

Globe and Mail reporting on March 16, 2026, based on Equifax Canada data not publicly released in full, disrupts that model. Near-prime borrowers — those with credit scores between 621 and 680 — saw their 90+ day delinquency rate increase by 31% over the year ending Q4 2025. That pace of acceleration was faster than the weakest subprime borrowers (credit scores 320–520), whose delinquency rate rose 23%, and faster than the 521–580 cohort, which rose 28%. [1]

The absolute numbers are still low. Nationally, the near-prime delinquency rate was 0.44% in Q4 2025. For the most creditworthy borrowers, it was 0.01%. Across all borrowers, 0.26%. [1] [2]

But the rate of change is where the finding sits. The middle tier isn't just experiencing stress — it's experiencing stress at a pace that exceeds the tier below it. That inversion is the signal this article tracks.

What the Stress Test Assumed

The federal mortgage stress test — Guideline B-20 for uninsured mortgages, with a parallel rule for insured mortgages — requires borrowers to demonstrate they can service their mortgage at a qualifying rate above their actual contract rate. Since June 1, 2021, that qualifying rate has been the greater of the borrower's contract rate plus 200 basis points or a floor of 5.25%. [3] [4]

During the pandemic lending window — roughly 2020 through early 2022 — five-year fixed mortgage rates fell as low as approximately 1.7%. Borrowers at those rates qualified under the stress test at the 5.25% floor, since their contract rate plus 200 basis points fell below the floor. [4]

Those borrowers are now renewing. Renewal rates remain materially above pandemic-era lows, even after recent Bank of Canada easing. That means the actual renewal rate for many pandemic-era originations is below the rate they were stress-tested at. On paper, the qualifying-rate overlay worked: many of these borrowers were qualified for a payment level higher than what they're now actually facing at renewal. [1]

The Bank of Canada's 2025 Financial Stability Report confirmed this arithmetic. It noted that about 60% of outstanding mortgages would renew in 2025 or 2026, and that more than 90% of five-year fixed borrowers would face payment increases smaller than what they were stress-tested for. [8]

The qualifying-rate overlay, in other words, appears to have reduced rate-risk vulnerability for the cohort it was designed to protect. The question is what it was not designed to absorb.

The Gap the Test Didn't Model

The mortgage stress test is not a full household-resilience model. It is a qualifying-rate overlay applied within broader underwriting rules that include debt-service ratios, property taxes, heating costs, and in some cases condominium fees. The qualifying-rate component tests whether borrowers can carry the mortgage at a higher rate. It does not continuously re-underwrite borrowers against later increases in the wider cost of living — grocery inflation, insurance premium growth, utility rate changes, and childcare costs that arrive after origination. [3]

The Bank of Canada's Staff Analytical Note 2023-19, published in December 2023, projected that the median monthly mortgage payment would rise from approximately $1,200 to $1,600 by end-2027 for borrowers renewing at higher rates — a roughly 33% increase in shelter costs alone. [5]

But that 33% increase arrived alongside a period in which the consumer price index for shelter in Canada's major metropolitan areas rose significantly. Statistics Canada data shows sustained shelter-cost inflation in the Toronto and Vancouver CMAs across 2023–2025, compounding the payment shock for borrowers in those markets. [9]

The household debt service ratio — the share of disposable income devoted to debt payments — was 14.57% nationally in Q4 2025, according to Statistics Canada. That was essentially flat across 2025, ranging from 14.40% to 14.64% quarter over quarter. [7] [10] [11] [12]

The national stability of the debt service ratio masks geographic concentration. Equifax's data — and CMHC's independent reporting — show that the stress is not evenly distributed.

Where the Stress Concentrates

The Equifax data reported by the Globe identifies five markets where the deterioration is most acute: Toronto, Vancouver, Brampton, Markham, and Oshawa — all high-cost markets in the GTA corridor or Metro Vancouver. In these markets, the delinquency rate has increased for every type of mortgage borrower. [1]

Near-prime delinquencies in those five markets rose 55.6% year-over-year. Subprime delinquencies rose 50%. Prime borrowers increased 32.5%. Even borrowers with the highest credit scores saw their delinquency rate increase by 4.5%. [1]

This geographic concentration aligns with independent data. CMHC reported in November 2025 that the national mortgage delinquency rate for Q2 2025 was 0.22%, but Ontario was 0.23% and the Toronto CMA specifically was 0.24%. [13]

The Canadian Bankers Association's December 2025 arrears data showed Ontario at 0.27% — the highest of any major province except Saskatchewan at 0.52%. [2]

Equifax also reported that borrowers with the largest mortgages — loans greater than $800,000 — are experiencing the sharpest increases. In Ontario, the delinquency rate on those large loans rose 28% year-over-year. In British Columbia, 26%. [1]

This is consistent with the stress test's arithmetic: the same percentage-point increase in rates produces a larger absolute dollar increase on a larger mortgage. A borrower renewing an $800,000 mortgage from a pandemic-era low to a current market rate faces a monthly payment increase that is, in dollar terms, substantially larger than someone renewing a $400,000 mortgage at the same rate change — even though both passed the same qualifying-rate test.

How They Got Here

This article is Part 3 of The Housing Trap, a series that follows the consequences of the decisions documented in The Housing Receipt. The connection between the earlier parts and this data is structural, not incidental.

Part 1 documented how the federal government's Home Buyers' Plan channelled retirement savings into the housing market during the 2020–2022 bubble window, then expanded the withdrawal limit from $35,000 to $60,000 during the correction. Those buyers entered the market with depleted retirement savings and mortgages originated at pandemic-era rates. [14]

Part 2 documented how parents pledged their borrowing capacity through co-signing arrangements that carry joint-and-several liability, and now face co-signer exit failure: the mortgage renews, but the parent cannot be removed because the child cannot independently qualify at current rates. [15]

The borrowers appearing in the Equifax near-prime delinquency data overlap significantly with the cohort those instruments produced, though the data does not disaggregate at that level. OSFI's 2025–2026 Annual Risk Outlook explicitly identified "mortgages originated at historic lows before March 2022" as the most exposed group. [6] The Bank of Canada's 2024 Financial Stability Report stated that borrowers who took mortgages in 2021 and early 2022 at very low rates and near-peak house prices would "generally see larger increases in payments at renewal." [16]

This article does not claim that every near-prime borrower now in delinquency used the HBP or had a parental co-signer. What the data does show is that the cohort most exposed to delinquency acceleration — mid-credit borrowers who originated during the pandemic at the lowest rates in Canadian history — is the same cohort that the government's fiscal instruments and co-signing norms were designed to serve. The overlap is a structural observation, not a proven compositional claim.

The Regulators Flagged It

This pattern was not invisible to regulators. OSFI explicitly warned about it — repeatedly.

In March 2024, OSFI issued guidance titled "Reinforcing residential mortgage risk management practices," stating that many borrowers would face "payment shock at renewal or sooner, especially variable-rate mortgages with fixed payments." [17]

OSFI's 2024–2025 Annual Risk Outlook, published May 2024, stated that 76% of mortgages outstanding as of February 2024 would renew by end-2026, and that those homeowners "could face payment shock, most significantly those who took mortgages in 2020 to 2022." [18]

The semi-annual update in October 2025 reiterated that "a subset of borrowers will still face significant payment increases" and identified mortgages originated before March 2022 as the most vulnerable. [19]

These are not retrospective assessments. OSFI was describing the risk in real time, using language that directly maps to the cohort now appearing in the Equifax delinquency data. The regulator that administers the stress test was simultaneously flagging payment-shock risk that persisted even for borrowers originated within the stress-tested system.