2026 Canadian Mortgage Refinance Guide: Costs & Break-Even Math
Direct answer
A refinance breaks even when total costs — prepayment penalty plus legal, appraisal, and discharge fees — divided by monthly payment savings is fewer months than you will keep the new loan. Conventional refinances are capped at 80% loan-to-value and are always stress-tested at the Minimum Qualifying Rate under OSFI Guideline B-20.
Verified 2026-08-29
| Threshold | Rule | Source |
|---|---|---|
| Break-even months | Total refinance cost ÷ monthly payment savings | OSFI Guideline B-20 |
| 80% LTV | Conventional (uninsured) refinance cap of appraised value; standard cash-out is not insurable | OSFI Guideline B-20 |
| MQR 5.25% / +2% | Refinance is always stress-tested; the straight-switch exemption does not apply | OSFI straight-switch rule |
TL;DR
Refinance vs. Renewal A refinance is always stress-tested at contract + 2% or 5.25%; an uninsured straight switch at renewal is exempt and pays no penalty. If you only want a better rate, wait — many lenders let you switch up to 120 days before term-end penalty-free, sometimes covering switch costs plus incentives up to $4,000.
2026 Canadian Mortgage Refinance Guide: Rates, Rules, Costs & Break-Even Math
Expert Research FAQ
How do GDS and TDS ratios affect a client's refinancing options?
A refinance is underwritten conservatively — lenders assess the client's income and debts against current and stressed conditions, not just today's rate.
For insured files the insurer's debt-service rules govern; for uninsured files the lender's own capacity assessment applies.
Uninsured refinances must qualify at the greater of the client's contract rate + 2% or 5.25% (the MQR).
Refinances are underwritten to GDS ≤ 39% and TDS ≤ 44% — flag the client's TDS headroom before sizing the loan, since consolidated debt loads it further.
What is the Loan-to-Value (LTV) ratio, and how does it cap a refinance?
A conventional refinance is capped at 80% of appraised value; the client can't exceed it without insurance.
The sole 2026 exception is the CMHC secondary-suite refinance at up to 90% of as-improved value.
Lenders set and closely monitor LTV limits, which affect the client's rate.
A HELOC usually caps at 65% standalone or 80% combined with a mortgage.
The LTV is recalculated whenever the client refinances.
How does OSFI's Guideline B-20 affect refinancing?
B-20 sets the careful lending practices lenders must follow when approving a mortgage.
The borrower's ability to repay is the most important factor for approval.
Lenders can't rely on mortgage insurance instead of assessing the borrower's finances.
A refinance is always stress-tested at contract + 2% or 5.25% — the straight-switch exemption does not apply.
What is a 'straight switch,' and how does it help clients at renewal instead of refinancing?
It only applies to uninsured borrowers keeping the same loan amount and schedule.
For a client who only wants a better rate, waiting to switch at renewal beats a penalty-triggering refinance.
How should I advise a client on the prepayment penalty and IRD before a refinance?
Price the penalty first: greater of three months' interest or IRD (fixed); three months' interest only (variable).
FCAC example: $3,000 (three months) vs. $12,000 (IRD) on the same loan — the client pays the higher.
Ask the lender exactly how the IRD is computed; posted-vs-contract-rate methods change the number materially.
The IRD shrinks toward renewal — time-to-renewal is the biggest lever on penalty size.
When should I steer a client to the 90% CMHC secondary-suite refinance?
Terms: up to 90% of as-improved value, up to 4 units, property under $2M, 30-year amortization.
Eligibility: 600 credit score, GDS ≤ 39% / TDS ≤ 44%, owner-occupancy, no short-term rentals.
Effective January 15, 2025 and unchanged in 2026 — the only sanctioned route above the 80% cap.
How do I frame refinance-vs-renewal timing for a client?
Timing is the biggest cost lever — the penalty only exists mid-term.
Within ~120 days of renewal, wait: many lenders allow a penalty-free early switch, exempt from the stress test.
Mid-term breaks require a break-even that clears before the client would sell or renew; otherwise price a blend-and-extend or HELOC.
Switching at renewal can attract lender concessions — covered switch costs plus incentives up to $4,000 on larger balances.
Primary sources
Primary sources cited by the Ratellow Research Team. Editorial standards · Correction policy
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