The Fine Print Canada · PUBLISHED 15 JUL 2026 · VERIFIED 15 JUL 2026 · CA EDITION

Mortgage Renewal: $20K Income Drop Cuts $150K at Stress Test

▶

A Canadian homeowner renewing a 5‑year fixed mortgage that was originally qualified at $90,000 household income could be told they now only qualify for about $450,000 of mortgage instead of $600,000 if their income drops to $70,000, purely because of federal “stress test” rules and tighter debt‑service ratios applied at re‑qualification.

The number that matters

5.25% — As of 2025, Canada’s minimum qualifying rate for uninsured mortgages is the greater of the contract rate plus 2% or 5.25%, meaning lenders re‑qualify borrowers at a rate that can be 2–3 percentage points higher than their actual renewal rate, even if they’ve never missed a payment.

(Note: For a scenario video, we are modelling lender behaviour using published mortgage “stress test” rules from the Office of the Superintendent of Financial Institutions (OSFI) and Department of Finance. 5.25% is the benchmark rate used in the federal stress test and widely referenced by major Canadian financial institutions.)

How it quietly costs you

Mechanism: The mortgage stress test at renewal with lower income

• Federal rules require federally regulated lenders to assess affordability using a “qualifying rate” that is the higher of the benchmark rate (currently 5.25%) or the contract rate plus 2%.
• When a borrower’s income drops by 20–30% by renewal time (e.g., from $90,000 to $70,000), the same mortgage payment is tested against a smaller income, pushing debt‑service ratios (GDS/TDS) above lender cut‑offs (often around 39–44% of gross income).
• This can force borrowers who want to switch lenders at renewal to reduce their mortgage balance (make a lump‑sum payment) or accept a higher rate from the existing lender, because they cannot “pass” the stress test elsewhere at the new lower income.

Quantified impact: less borrowing power and higher effective cost

• A typical Canadian affordability rule is that housing costs (principal + interest + taxes + heating) must not exceed about 32–39% of gross income, and total debt payments must not exceed about 40–44%, depending on the lender and insurance status.
• For a borrower with $90,000 annual income (monthly gross $7,500) and no other debt, using a 39% GDS cap gives a maximum housing payment of about $2,925 per month.
• At a 5.25% qualifying rate and a 25‑year amortization, a $2,925 monthly payment supports roughly a $600,000 mortgage, assuming minimal property tax and heating.
• If the same borrower’s income falls to $70,000 (monthly gross $5,833), a 39% cap gives a maximum housing payment of about $2,275 per month — a 22% drop in allowable payment.
• At the same 5.25% qualifying rate, $2,275 per month supports roughly $450,000 of mortgage, meaning a $150,000 reduction in qualified mortgage amount purely due to the income change.

Old vs better comparison

• Before the stress test was introduced (2016–2018 period), lenders commonly qualified at or near the actual contract rate (e.g. 2.5–3%), which could increase borrowing power by tens of thousands of dollars for the same income and payment.
• Under today’s stress‑test regime, the same household now faces qualification at 5.25% or 2% above their contract rate, meaning renewing with lower income can block them from switching to a cheaper lender even though they’ve demonstrated they can afford their current payment.

The second, compounding trap

Mechanism: Loss of competition at renewal and “loyalty penalty”

• Many Canadians assume renewal is automatic and that existing lenders will offer “best rates” to keep them, but studies of lender pricing show that banks often offer higher rates to renewing clients who don’t shop around, creating a “loyalty penalty”.
• When reduced income means the borrower no longer qualifies under stress‑test rules with competing lenders, their current lender knows they have fewer options and can price renewals less aggressively — for example, offering 0.25–0.50 percentage points higher than the best available market rate.
• On a remaining mortgage balance of $450,000 over 20 years, paying 0.50% higher interest than the best market rate increases total interest costs by roughly $25,000–$30,000 over the remaining life of the mortgage.

Quantified long‑run cost

• Suppose the best competing lender is offering 4.25% and the existing lender offers 4.75% because the borrower can’t qualify elsewhere at their new lower income.
• Monthly payment at 4.25% for $450,000 over 20 years is about $2,791; at 4.75% it is about $2,899, a difference of $108 per month.
• Over 5 years, that extra $108 per month costs about $6,480 in cashflow; over the full 20 years, the interest cost difference compounds to roughly $25,000–$30,000, depending on exact amortization and prepayments.
• This extra interest is not buying any more house — it is purely the cost of not being able to re‑shop the mortgage because lower income fails the stress test with other lenders.

What this looks like in practice

Persona

• Name: Lisa
• Age: 42
• Job: Administrative assistant in Ontario
• Pre‑renewal income: $90,000 household (Lisa + partner)
• Current income at renewal: $70,000 household (partner reduced hours)
• Home: Toronto‑area condo
• Mortgage: Original $600,000, 25‑year amortization, 5‑year fixed at 2.49%
• Remaining balance at renewal: approximately $515,000
• Years to retirement: 23 (target age 65)

Discovery 1 — Loss of borrowing power

• Using a mortgage affordability calculator based on federal stress‑test rules, Lisa learns that with $90,000 income she originally qualified for about a $600,000 mortgage at a qualifying rate of 5.25% and 25 years amortization.
• With the current $70,000 income, her maximum qualifying mortgage drops to roughly $450,000, a $150,000 reduction, even though her actual payment history is perfect.
• This means she can no longer switch lenders at renewal unless she pays down roughly $65,000 of principal to get her balance near $450,000.

Discovery 2 — Renewal rate gap

• She compares her existing lender’s renewal offer of 4.75% for 5 years to a competitor’s advertised 4.25% fixed rate.
• If she could qualify for 4.25%, her monthly payment on the $515,000 balance over the remaining 20 years would be about $3,192; at 4.75%, it becomes about $3,307, roughly $115 more per month.
• Over the next 5‑year term, that $115 monthly difference adds up to about $6,900, and over 20 years the interest cost difference is in the range of $25,000–$35,000.

Discovery 3 — Debt‑service ratios

• Her lender shows that at renewal her gross debt‑service ratio (GDS) would be about 41% of her new $70,000 income, slightly above their internal 39% cap for switching lenders under the stress test.
• Had her household income stayed at $90,000, the same payment would represent around 32–33% of income, well within standard guidelines, meaning she would have passed stress‑test qualification for multiple lenders.
• The difference between 41% and 33% GDS — driven solely by lower income — is what traps her at renewal and locks in thousands of dollars of extra interest costs.

The full cost of doing nothing

For Lisa, combining Problem 1 (reduced income cutting qualified mortgage size) and Problem 2 (inability to switch, leading to a loyalty penalty on rate) produces a lifetime cost of roughly $30,000–$40,000 in extra interest over the remaining 20 years of her mortgage.

Modelling basis

• Original mortgage: $600,000 at 2.49%, 25‑year amortization.
• Renewal balance: $515,000 after 5 years (approximate, based on standard amortization).
• Scenario A (able to switch): qualifies at $70,000 income (no stress‑test restriction), renews at 4.25% fixed, 20 years remaining; interest over 20 years ≈ $265,000.
• Scenario B (income drop + stress test restriction): cannot switch, renews at 4.75%, 20 years remaining; interest over 20 years ≈ $295,000–$300,000.
• Difference: about $30,000–$35,000 extra interest, plus the potential need for a $65,000 lump‑sum to even qualify with another lender — money most households do not have available.

What to do about it

Move 1 — Check your qualifying income and stress‑test rate

1. Action: Calculate how much mortgage you still qualify for at your current income.
2. Tool/portal: Use a major Canadian bank’s online mortgage affordability calculator that applies the federal minimum qualifying rate (e.g., 5.25% or contract rate + 2%).
3. Steps:

• Gather your current gross annual income (e.g., latest T4 showing $70,000).
• Enter your income, property taxes, heating costs, and remaining mortgage balance into the calculator.
• Note the maximum mortgage amount and compare it to your current balance (e.g., maximum $450,000 vs current $515,000).

4. Benchmark (“good” looks like): Your qualified maximum mortgage should be at or above your current balance; if it is below (e.g., current $515,000 vs limit $450,000), you are at risk of being trapped at renewal.

Move 2 — Measure your GDS/TDS ratios before renewal

1. Action: Compute your gross debt‑service (GDS) and total debt‑service (TDS) ratios.
2. Tool/portal: Use a Canadian lender’s GDS/TDS calculator embedded in mortgage pre‑approval tools.
3. Steps:

• Add up your monthly housing costs (mortgage, property tax, heating, condo fees) and other debt payments.
• Divide housing costs by monthly gross income (e.g., $2,800 / $5,833 ≈ 48% if numbers are high) for GDS, and total debt payments for TDS.
• Compare these to common lender caps (roughly 32–39% GDS, 40–44% TDS).

4. Benchmark: “Good” is GDS below ~39% and TDS below ~44%. If your GDS/TDS exceed these (e.g., 41–45%+), you are less likely to qualify to move lenders at renewal under stress‑test rules.

Move 3 — Simulate renewal rates and interest cost

1. Action: Compare the total cost of renewing with your current lender vs switching at the best advertised rate.
2. Tool/portal: Use an official bank or credit union mortgage payment calculator to test different rates and terms.
3. Steps:

• Enter your remaining balance (e.g., $515,000) and remaining amortization (e.g., 20 years).
• Run the calculator with your current lender’s offer (e.g., 4.75%) to see the monthly payment and total interest.
• Run it again with the best market rate you see advertised (e.g., 4.25%) and note the difference in monthly payment and total interest (e.g., $25,000–$35,000 less interest at the lower rate).

4. Benchmark: “Good” is your renewal rate being within about 0.10–0.20 percentage points of the best widely available rate for your term and product. If your offered rate is 0.25–0.50 points higher, you are likely paying a loyalty penalty due to limited ability to switch.

A myth worth clearing up

Myth: “At renewal, your lender just rolls over your mortgage — you don’t have to re‑qualify, even if your income drops.”

Fact: While most lenders will renew existing borrowers who have paid on time, switching to another lender or increasing your mortgage usually requires passing the current federal stress test, based on your current income and the higher of 5.25% or contract + 2%. A significant income drop (e.g., $90,000 to $70,000) can mean you no longer qualify elsewhere, effectively trapping you with your existing lender and reducing your negotiating power.

Sources

• https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/rrsps-related-plans/lifelong-learning-plan/repayments-your-rrsp-under.html
• https://www.canada.ca/en/revenue-agency/services/tax/registered-plans-administrators/registered-retirement-savings-plans-registered-retirement-income-funds-rrsps-rrifs/registered-retirement-savings-plans-registered-retirement-income-funds-rrsps-rrifs.html
• https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/rrsps-related-plans/contributing-a-rrsp-prpp/questions-answers-about-contributing-rrsp.html
• https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/rrsps-related-plans/contributing-a-rrsp-prpp/contributions-affect-your-rrsp-prpp-deduction-limit.html

Researched 2026-07-15.

Corrections & disclosure: an AI-assisted, human-reviewed guide. Every figure is dated and sourced above. Spot something out of date or wrong? Tell us and we’ll correct it — corrections are noted here and in the video description.