The client
An oilfield services contractor in Calgary, self-employed and reporting through a sole proprietorship, whose most recent T1 shows a sharp drop from the year before — four months without a single contract during a regional slowdown in drilling activity.
The work has since resumed at pre-downturn volume, and his own truck — financed and used almost entirely for job sites — is the one recurring debt payment on an otherwise clean file.
Borrower
Self-employed oilfield contractor
Sole proprietorship; two years of T1 Generals filed
Two years ago
$124,000 self-employment income
A full, pre-downturn year of contracts
Most recent year
$58,000 self-employment income
Regional downturn cost four months of contract work
Purchase
$390,000 detached, Calgary
Property tax est. $310/mo; heat est. $140/mo
Down payment
$39,000 — 10%
Under 20%, so the file must be default-insured
Other debt
Work-truck loan, $400/mo
No other recurring debt on the file
The problem
The most recent year’s income was 53% lower than the year before it. Bank A’s policy treats any year-over-year self-employment income drop of that size as a signal of instability and qualifies strictly on the lower figure, without asking why the drop happened.
The low-year read
- ▸Income used: most recent year only, $58,000 ÷ 12 = $4,833/mo
- ▸GDS at the qualifying rate: 60.3% — against CMHC’s 39% maximum
- ▸TDS at the qualifying rate: 68.6% — declined
Seasonal income and layoff cycles are a known feature of resource-sector self-employment, not a sign that the borrower’s business is failing — but a policy built around a flat percentage-drop threshold cannot tell the difference between a business winding down and a contractor who lost four months to a regional slowdown and then went straight back to work.
The numbers
At 10% down this is an insured file, and Alberta has no land transfer tax to complicate the closing math, so the ratios here are the whole story. The purchase price sits close to the average new mortgage amount in Canada, which is part of why the income-read question decides this file outright rather than at the margins.
| Structuring the insured loan | Amount |
|---|---|
| Purchase price | $390,000 |
| Down payment (10%) | −$39,000 |
| Base mortgage (90% LTV) | $351,000 |
| CMHC premium — 3.10% in the 85.01–90% LTV band, capitalized | +$10,881 |
| Total insured mortgage | $361,881 |
| Rate & payments | Figure |
|---|---|
| Contract rate — 5-year fixed (illustrative, not a quote) | 4.69% |
| Minimum qualifying rate — greater of contract + 2% and 5.25% | 6.69% |
| Monthly P&I at the qualifying rate — the ratios run on this | $2,466 |
| Monthly P&I at the contract rate — what he actually pays | $2,041 |
The low year vs. the two-year average
| Income read | Monthly income | GDS | TDS |
|---|---|---|---|
| Low downturn year alone | $4,833 | 60.3% ✗ | 68.6% ✗ |
| Two-year average, documented | $7,583 | 38.5% ✓ | 43.7% ✓ |
Averaged across both years, income comes to $91,000 a year — $7,583 a month. Against the same $2,466 qualifying payment, $310 property tax and $140 heat estimate, GDS falls from 60.3% to 38.5% and TDS, with the $400 truck payment included, falls from 68.6% to 43.7%. Both clear their caps with a little room, not a lot.
The solution
An RECA-licensed Alberta mortgage associate rebuilt the file around the standard two-year self-employed average rather than accepting the low-year read as final.
First, obtained a signed letter explaining the gap. The contractor’s own account of the regional slowdown, cross-checked against publicly reported drilling activity for the period, turned a bare drop into an explained one.
Second, confirmed the recovery with current-year evidence. Recent invoices and a signed contract for ongoing work showed billings had already returned to pre-downturn volume, which is what made the two-year average a fair read rather than a hopeful one.
Third, placed the file with a lender that reads self-employed income the way Canadian underwriters are trained to, weighing a documented explanation rather than applying a flat percentage-drop rule with no exceptions.
The outcome & the closing math
Approved and funded: insured at 90% LTV, 25-year amortization, 5-year fixed term. Alberta has no land transfer tax, so closing costs here stayed to Land Titles registration fees and legal costs rather than a percentage-of-price tax — a real structural difference from provinces with a marginal-bracket transfer tax.
The lender also required evidence of funds to cover closing costs on top of the $39,000 down payment, which the same 90-day statements demonstrated. As is standard on any resource-sector self-employed file, the lender flagged the account for a documented income re-check at renewal rather than an automatic rollover.
What to take from this file
- 01A flat year-over-year percentage-drop rule cannot distinguish a struggling business from a seasonal or cyclical one. Resource-sector self-employment moves with the sector; the question is whether the drop is explained and the work has resumed.
- 02Document the reason for the gap, not just the number. A signed explanation plus current evidence of recovery is what turns a low year into an averaged year rather than a declined one.
- 03The two-year average is the standard treatment for self-employed income — know which lenders actually apply it. Some read the lowest year only; others read the average; the difference decided this file entirely.
- 04The approval math runs at the qualifying rate, not the contract rate. This file qualifies at 6.69% and pays at 4.69%.
- 05Alberta’s lack of a land transfer tax simplifies the closing math but not the income math. Do not let one easy number distract from the ratio work that actually decides the file.
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:
- ▸4.69% contract rate — rates move daily; not a quote.
- ▸treating a large year-over-year income drop as automatically unstable — each lender sets its own overlay for volatile self-employment income.
- ▸$310/mo property tax and $140/mo heat estimate — lender-standard estimates, not rules.
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.