Renewing a Mortgage After Credit Has Deteriorated — Canada 2025-2026

Under OSFI Guideline B-20 and the December 2024 straight-switch clarification, federally regulated financial institutions (FRFIs) are not obligated to re-underwrite a borrower at renewal when the loan amount, amortization, and property remain unchanged. In practice, most Schedule I banks and many monolines will issue a renewal offer letter 120–180 days before maturity without pulling a new credit bureau or verifying income. This is the single most important fact for a bruised-credit borrower: if you do nothing, your existing lender will almost certainly renew you — at their posted or discretionary rate, not necessarily the market-best rate. The trade-off is that you lose negotiating leverage and will likely pay 15–40 bps above what a clean-credit borrower switching lenders would receive. Accept the renewal offer in writing before the maturity date to avoid technical default.

Three scenarios force you into the open market despite wanting to stay: (1) your lender is exiting the residential market or selling your mortgage to a servicer with different retention policies; (2) you need to extend amortization to manage payment shock — any amortization change triggers full re-underwriting; (3) your lender's retention rate is so far above market that the cost of staying exceeds the cost of a B-lender switch. In all three cases, a new lender will apply the Minimum Qualifying Rate (MQR) — currently the greater of the contract rate plus 200 bps or 5.25% — and will pull a full credit bureau. A score below 600 will disqualify most prime lenders outright; scores in the 600–640 range may qualify at select monolines with compensating factors (low LTV, strong income, no recent NSFs).

Alternative lenders (Home Trust, Equitable Bank, Haventree, MCAP's B-shelf, RFA) underwrite to their own credit-score floors, typically 550–580 minimum, with rate premiums that reflect risk tier. At a 598 score and 77% LTV, expect: contract rate 6.25–6.75% on a 5-year fixed, lender fee 0.5–1.0% of the loan amount (added to closing costs or capitalized), and a 1-year or 2-year term rather than 5-year to force a re-qualification once credit is repaired. The stress test still applies at B-lenders — qualifying rate is contract rate + 200 bps, so a 6.50% contract rate requires qualifying at 8.50%. At $468,000 and $95,000 income, TDS at 8.50% is approximately 44–46%, which is at or above most B-lender TDS ceilings of 44%. Run the TDS math before assuming a B-lender will approve the switch.

If B-lender TDS ceilings are breached or the credit event is severe (active consumer proposal, recent bankruptcy discharge under 2 years), private mortgage investment corporations (MICs) and individual private lenders will lend on equity alone. At 77% LTV in Ontario, private rates run 9.5–11.5% with 2–3% lender and broker fees. A 1-year private term is standard. The math only works if: (a) the equity cushion is real and the property is liquid, and (b) there is a credible 12-month credit-repair plan that returns the borrower to B-lender or prime eligibility at the next renewal. Without a documented exit strategy, private lending is a debt spiral, not a bridge.

A 1–2 year B-lender or private term is only valuable if it is used to rebuild the credit profile. The fastest-impact actions, ranked by credit-score effect: 1. Bring all derogatory accounts current and obtain written confirmation of zero balance or settlement. 2. Reduce revolving utilization below 30% on all cards — utilization is recalculated monthly and has immediate score impact. 3. Add one secured credit card with a $1,000–$2,000 limit and pay in full each cycle. 4. Do not apply for new credit in the 6 months before the next renewal. A borrower starting at 598 with no new derogatory events can realistically reach 650–680 within 18–24 months, which reopens prime-lender eligibility. Document the trajectory with quarterly bureau pulls.

With the Bank of Canada overnight rate at approximately 2.75% as of early 2026, 5-year fixed rates for prime borrowers are in the 5.00–5.50% range and variable-rate mortgages are priced at 5.25–5.75% (prime minus spreads). The spread between prime and B-lender 5-year fixed is approximately 125–175 bps in the current environment. For a $468,000 balance, that spread costs roughly $5,900–$8,200 per year in additional interest — a meaningful but not catastrophic cost if the term is limited to 1–2 years and credit repair is executed. Borrowers who locked into 5-year terms at B-lender rates in 2024–2025 and did not repair credit will face compounding cost at the next renewal.