The client
A household in Edmonton, Alberta, is buying at $415,000 with $41,500 (10%) down. A starting credit score of 655 is comfortably above CMHC's 600 insured floor from the very first conversation -- eligibility was never the question on this file.
Purchase price
$415,000
Edmonton
Down payment
$41,500 (10%)
Insured purchase
Credit score, first pricing
655
Well above CMHC's 600 floor
This lender's rate card
5.15% below 680, 4.85% at or above it
A pricing tier, not an eligibility gate
Combined income
$8,600/month
Comfortable on either rate
The problem
CMHC's 600-score floor is a pass/fail eligibility gate for insured files. This lender's own rate card is a completely separate thing: a pricing tier, layered on top of eligibility, that charges 5.15% for scores under 680 and 4.85% at or above it. A score of 655 clears the floor with real margin and still lands squarely in the surcharged pricing tier.
Two different lines, easy to conflate
- ▸CMHC's 600 floor: decides whether an insured file is eligible at all
- ▸This lender's 680 rate-card threshold: decides what rate an already-eligible file gets charged
- ▸A score can clear the first with ease and still sit on the wrong side of the second -- eligibility and price are not the same question
Nothing about the mortgage itself needed to change to fix this. The file was approvable at 655 and would be approvable at 695 -- the only thing riding on the score, past the 600 floor, was the price.
The numbers
Pricing the same mortgage at both tiers made the gap concrete and gave the household a clear, quantified reason to spend two months on credit utilization before locking a rate -- a pattern consistent with broader credit-score statistics for Canadian mortgage borrowers.
| The same mortgage, two rate tiers | Amount |
|---|---|
| Insured mortgage amount | $385,078 |
| Rate below 680 (surcharged) | 5.15% |
| Rate at or above 680 (standard) | 4.85% |
| Payment at the surcharged rate | $2,273/mo |
| Payment at the standard rate | $2,207/mo |
| Monthly cost of the surcharge | $66 |
| Ratio check at the qualifying rate (worse-priced tier) | Figure |
|---|---|
| Minimum qualifying rate on the 5.15% surcharged contract rate | 7.15% |
| Payment at the qualifying rate, 25 years | $2,733 |
| GDS (payment + $290 tax + $125 heat) ÷ $8,600 income | 36.6% |
| TDS (GDS numerator + $340 car loan) ÷ $8,600 income | 40.6% |
36.6% GDS and 40.6% TDS pass with room even at the surcharged rate -- confirming the score was never close to the 600 eligibility floor at either tier. The only number that moved with the score was the price.
The solution
A mortgage associate licensed under Alberta's Real Estate Act, regulated by RECA, separated the eligibility question from the pricing question from the first conversation.
First, confirmed the mortgage was approvable at 655 before discussing the score further. No point spending two months chasing a rate tier if the file itself was still in doubt -- it wasn't.
Second, identified the specific driver of the score: elevated balances on two credit cards, well within their limits but pushing utilization higher than the lender's pricing model rewarded. A distinction worth understanding on its own terms, not folded into eligibility.
Third, timed the rate lock to follow, not precede, sixty days of paying those balances down. Locking early at the surcharged rate would have cost real money for no reason, once the household was already committed to the paydown.
The outcome
The mortgage funded at 4.85% instead of 5.15%, saving $66/mo on an identical loan amount and identical ratios throughout. Sixty days of paying down two credit cards changed the price; it never changed whether the file would be approved.
CMHC's 600 credit-score floor is an eligibility gate, not a pricing schedule -- what a specific lender charges above that floor is that lender's own risk-based pricing policy, and it varies from one lender to the next.
What to take from this file
- 01Eligibility and pricing are two different questions, decided by two different thresholds. CMHC's 600 floor answers the first; a lender's own rate card answers the second.
- 02A score comfortably above the insured floor can still sit inside a lender's surcharged pricing tier. Clearing eligibility says nothing about clearing a specific lender's best rate.
- 03Know which problem you're solving before recommending action. A file that was never going to decline doesn't need saving -- it needs pricing.
- 04Utilization, not just score history, drives some lenders' pricing tiers. Paying down balances, not closing accounts, is usually the direct fix.
- 05Time the rate lock to the confirmed outcome, not the hoped-for one. Locking before the paydown showed up on a re-pulled bureau would have cost the saving entirely.
Sources
Every regulatory figure in this file traces to one of these primary sources. Client details and anything that varies by lender are illustrative, as flagged below.
- ▸CMHC — Purchase (Mortgage Loan Insurance) — default-insurance premium schedule by LTV band (25-year amortization).
- ▸OSFI — Minimum qualifying rate for uninsured mortgages — the minimum qualifying rate — greater of contract rate + 2% or 5.25%.
- ▸CMHC — CMHC Reviews Underwriting Criteria — GDS 39% / TDS 44% maximums and the 600 credit-score floor for insured files.
- ▸Provincial/territorial mortgage-broker legislation fetched directly (bclaws.gov.bc.ca, legisquebec.gouv.qc.ca, fcaa.gov.sk.ca, web2.gov.mb.ca, nslegislature.ca, assembly.nl.ca) plus FCNB's own site for NB and CanLII's index for PE — see notes for per-province method — provincial mortgage regulators and licence titles.
Illustrative in this file — lender-specific, not rules:
- ▸5.15% / 4.85% rates — rates move daily; neither is a quote.
- ▸the 680 rate-card threshold — each lender sets its own internal pricing tiers by credit score, separate from CMHC's 600 insured-eligibility floor -- this is one lender's policy, not a universal number.
Authority & provenance
How this case file was built
We publish the origin, the verification method and the reviewer for every case file, so you can judge how far to trust it before you rely on it with a client.
Where it comes from
Derived from files handled by Treadstone’s fulfillment desk and from scenarios contributed by partner brokerages. Names, employers, exact amounts and dates are changed so no client or file is identifiable.
Provenance: Composite — a pattern seen repeatedly on fulfilled files, not a single transaction.
What is verified
Every regulatory figure traces to a primary source listed above and was checked against it on the date shown. The arithmetic is recomputed by machine on every rebuild.
Anything that varies by lender is labelled illustrative rather than stated as a rule.
Who reviewed it
Reviewed for Canadian regulatory accuracy before publication, and re-checked whenever a cited rule changes.
Reviewed by: Nicholas Parson, Treadstone Associates — reviews every case file before publication.
This case file is professional reference material for licensed mortgage professionals. It is not advice to a borrower, and it is not a lender commitment. Insurer rules, qualifying rates and provincial taxes change — confirm the current position with the insurer, regulator or lender before you rely on any figure here in a live file.