The client
A household in Terrace buying a $340,000 home at 10% down carried a revolving personal line of credit with a real $25,000 limit and a $410 balance -- a line whose issuer had never furnished its own limit to the bureau.
Purchase price
$340,000, Terrace
10% down, insured
Line's true limit
$25,000
Printed on the account's own monthly statement
Line's true balance
$410
A small fraction of the real limit
Bureau's own reading
no limit on file
Defaulted to treating the account as fully drawn
The problem
A revolving account's reported utilization is a ratio of balance to limit -- and some issuers, for some products, do not furnish a limit to the bureau at all, leaving the ratio undefined.
What happened when the limit field was empty
- ▸The line's issuer does not furnish a credit-limit figure to the bureau for that particular product
- ▸With no limit on file, the bureau's own utilization calculation defaulted to its worst-case convention: reading the account as though fully drawn against an assumed limit far smaller than the real one
- ▸That reading held the applicant's score at 587, under the 600 floor CMHC sets for insured files, even though the line's own printed statement showed a $410 balance against a real $25,000 limit
The household had never carried a real utilization problem. The bureau simply had no limit to calculate one against, and its own default assumption filled the gap the wrong way.
The numbers
Once the score itself cleared CMHC's floor, qualifying the purchase on the household's own income was routine arithmetic.
| The insured purchase, once the score cleared CMHC's 600 floor | Amount |
|---|---|
| Base mortgage (90% of purchase price) | $306,000 |
| CMHC premium (3.10% at 85.01-90% LTV) | +$9,486 |
| Total insured mortgage | $315,486 |
| Ratio check at the qualifying rate | Figure |
|---|---|
| Payment at the qualifying rate (6.85%), 25 years | $2,181/mo |
| GDS (payment + $265 tax + $105 heat) ÷ $7,200 income | 35.4% |
| TDS (GDS numerator + $225 car loan) ÷ $7,200 income | 38.6% |
35.4% and 38.6% sit comfortably inside CMHC's 39% GDS and 44% TDS maximums -- the ratios were never the obstacle on this file. The score, held under CMHC's 600 floor by a limit the bureau never had, was.
The solution
A submortgage broker licensed under BC's Mortgage Brokers Act treated the missing limit as a documentation gap the issuer, not the bureau, actually had to close.
First, obtained a letter directly from the line's issuer confirming the true $25,000 limit and the current $410 balance, referencing the account by its own number.
Second, supplied that letter to the bureau requesting the limit be added to the account's own record, correcting the utilization calculation at its source rather than disputing the score itself.
Third, confirmed the corrected score with the lender before resubmitting the file, rather than assuming the bureau's update would be reflected automatically on the next pull.
The outcome
The corrected reading brought the score to 623, clearing CMHC's 600 floor, and the purchase funded insured at 35.4% GDS and 38.6% TDS.
The specific before/after score figures are illustrative -- exactly how a missing limit affects a given bureau's score varies by scoring model, not a universal mapping.
What to take from this file
- 01Some issuers do not furnish a credit limit to the bureau for every product they offer. A missing limit is not evidence of a real utilization problem -- it is a data gap.
- 02A bureau's own default convention for a missing limit tends to assume the worst case. Confirm the true limit directly with the issuer before assuming the score reflects real risk.
- 03An issuer letter, sent to the bureau, corrects the record at its source. That is faster and more durable than disputing the score itself.
- 04CMHC's 600 credit-score floor is a real gate for insured files -- confirm exactly what is holding a score under it before assuming a genuine credit problem exists.
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).
- ▸CMHC — CMHC Home Start — minimum down payment tiers (5%/10%) and the $1.5M insured price cap.
- ▸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:
- ▸4.85% contract rate — rates move daily; not a quote.
- ▸the specific before/after score figures — exactly how a missing limit affects a bureau score varies by scoring model; these are illustrative, not a universal mapping.
- ▸a card or line issuer not furnishing its limit to the bureau — this is a known but issuer-specific practice, not a universal rule for every revolving product.
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.