The client
A first-time buyer in Oshawa, Ontario, 16 months into a full-time role earning $7,150/mo, is buying at $350,000 with the minimum insured down payment. Income is strong and consistent; the credit file is where the trouble starts.
Purchase price
$350,000
Oshawa
Employment
16 months, full-time
Same employer since hire
Income
$7,150/month
Salaried
Bureau file
One trade line -- an auto loan
Never held a credit card
Bureau result
No score returned
Not a low score -- no number at all
The problem
A single auto loan is a real, well-paid trade line -- but it is only one, and the scoring models most Canadian lenders rely on need a wider mix of account types before they will generate a reliable number at all. This file's bureau pull came back with no score, not a low one, and a first lender's policy treated that the same as a decline below the 600 floor.
No score is a different problem than a low score
- ▸CMHC's 600-score floor assumes a score exists to be measured against it in the first place
- ▸One trade line, with no revolving credit ever opened, is too thin a file for the model to compute a number, not evidence of poor repayment behaviour
- ▸A first lender's automated system read the absence of a score as if it were a failing one -- an internal shortcut, not a CMHC rule
Nothing about this applicant's actual repayment behaviour was ever in question. The car loan had never been late. The problem was entirely structural: the bureau's model needs more than one account to work with.
The numbers
Once the missing score was correctly identified as a data problem rather than a credit problem, the insured math itself was routine.
| The insured purchase | Amount |
|---|---|
| Purchase price | $350,000 |
| Minimum down payment (5%) | $17,500 |
| Base mortgage | $332,500 |
| CMHC premium (4.00% at 90.01-95% LTV) | +$13,300 |
| Total insured mortgage | $345,800 |
| Ratio check at the qualifying rate | Figure |
|---|---|
| Minimum qualifying rate on a 4.85% contract rate | 6.85% |
| Payment at the qualifying rate, 25 years | $2,390 |
| GDS (payment + $260 tax + $110 heat) ÷ $7,150 income | 38.6% |
| TDS (GDS numerator + $310 car loan) ÷ $7,150 income | 42.9% |
38.6% GDS and 42.9% TDS sit comfortably inside CMHC's 39% and 44% maximums -- the ratios were never close to a problem. The bureau's missing score was the only thing standing between this file and an approval.
The solution
A mortgage agent licensed under Ontario's Mortgage Brokerages, Lenders and Administrators Act treated the missing score as a documentation gap, not a credit event.
First, confirmed with the bureau that no score existed, rather than assuming a low one had been suppressed. The distinction matters: a low score still needs explaining; no score at all points straight at alternative documentation.
Second, assembled twelve months of documented rent and utility payment history. The insurer's own published position allows considering alternative methods of establishing creditworthiness for a borrower without a credit history, which this file plainly was.
Third, moved the file to a second lender whose underwriting team reviews alternative-credit files directly, rather than relying on an automated system that treats 'no score' as 'below the floor.' How different lenders handle a thin file, and why, is covered in how credit unions assess a file.
The outcome
The purchase funded insured on the alternative-credit package, with GDS at 38.6% and TDS at 42.9%, both comfortably inside CMHC's maximums. The ratios were fine from the start; the missing score was the only obstacle, and it was never actually a credit problem.
A first-time buyer whose file never held any revolving credit is a data-availability problem for the scoring model, not a signal of risk -- the two are easy to conflate and worth telling apart before declining a file outright.
What to take from this file
- 01No score and a low score are different problems with different fixes. A missing score points at documentation gaps; a low score points at repayment history.
- 02One trade line, however well paid, may not be enough for the model to compute a score at all. Bureau scoring models need a mix of account types, not just a clean payment history on a single loan.
- 03CMHC's own published position allows alternative credit for a borrower without a credit history. This isn't an exception invented case by case -- it's already in the insurer's stated policy.
- 04A first lender's automated decline isn't the last word. A second lender's underwriting team, reviewing the file directly, can reach a different and correct conclusion on the same facts.
- 05Confirm what the bureau actually returned before building a plan. 'Declined for credit' and 'no score available' call for entirely different fixes.
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.
- ▸a first lender treating 'no score' as 'below the floor' — this is one lender's internal policy shortcut, not a CMHC rule -- the insurer's own published position explicitly allows alternative methods for a borrower with no credit history.
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.