The client
An oilfield-services sole proprietor near Weyburn, providing contract services to drilling operators across the region. Three filed years tell the story of a regional drilling cycle in miniature: $108,000 in a boom year, $54,000 when the regional rig count dropped, and $72,000 as activity recovered.
Business
Oilfield-services sole proprietorship
Income tied to the regional drilling cycle
Three filed years
$108,000 / $54,000 / $72,000
Boom, regional bust, recovery
Credit picture
Good standing, one service-truck loan
Truck loan $460/mo
Purchase
$305,000, Weyburn
Property tax $200/mo; lender heat estimate $110/mo
Down payment
$30,500 — 10%
Under 20%, so the file must be default-insured
Regulator
Saskatchewan-licensed mortgage broker
Superintendent of Financial Institutions, via the FCAA
The problem
Reading the most recently completed filed year, the underwriter landed on the bust year — the one point in the cycle where regional drilling activity, and this business’s revenue with it, dropped hardest.
Reading the bust year alone
- ▸Income used: the bust-year figure only, $54,000/yr ÷ 12 = $4,500/mo
- ▸Liabilities: mortgage payment at the qualifying rate, property tax, heat and the truck loan
- ▸TDS: 62.3% against CMHC’s 44% maximum. Declined.
The bust year was real — regional drilling activity genuinely fell — but a single point in a well-documented cyclical industry is not a representative picture of ongoing capacity. Our piece on how Canadian lenders actually read business income covers why underwriters increasingly look for the full pattern in cyclical trades and services, not the single worst data point.
The numbers
At 10% down this is an insured file: CMHC’s maximums — GDS 39%, TDS 44% — apply as hard numbers.
| Structuring the insured loan | Amount |
|---|---|
| Purchase price | $305,000 |
| Down payment (10%) | −$30,500 |
| Base mortgage (90% LTV) | $274,500 |
| CMHC premium — 3.10% in the 85.01–90% LTV band, capitalized | +$8,510 |
| Total insured mortgage | $283,010 |
The minimum down payment at this price is $15,250 — 5% of the purchase price, since $305,000 sits under the $500,000 tier boundary — so $30,500 clears it comfortably.
| Rate & payments | Figure |
|---|---|
| Contract rate — 5-year fixed (illustrative, not a quote) | 5.29% |
| Minimum qualifying rate — greater of contract + 2% and 5.25% | 7.29% |
| Monthly P&I at the qualifying rate — the ratios run on this | $2,033 |
| Monthly P&I at the contract rate — what he actually pays | $1,693 |
Income — the bust year vs. the full cycle
| Income treatment | Monthly |
|---|---|
| Bust year alone | $4,500 |
| Three-year cycle average ($108,000 + $54,000 + $72,000 ÷ 3 = $78,000/yr) | $6,500 |
TDS — the bust year vs. the full cycle
| TDS line | Bust year alone | Full three-year cycle |
|---|---|---|
| Housing costs (PI + tax + heat) | $2,343 | $2,343 |
| Service-truck loan | $460 | $460 |
| Income used | $4,500 | $6,500 |
| TDS vs. the 44% cap | 62.3% ✗ | 43.1% ✓ |
GDS on the full-cycle average comes to 36.0%, inside the 39% cap. Unlike an add-back, which restores non-cash deductions within a single year, contract-cycle smoothing works across years — it changes which years count, not what counts within them.
The solution
A Saskatchewan-licensed mortgage broker, operating under the Superintendent of Financial Institutions via the FCAA, reframed the file around the documented drilling cycle rather than the single most recent year.
First, established the cycle as a known, documentable pattern rather than an unpredictable swing — three consecutive filed years showing boom, bust and recovery is a pattern a lender can read, not a red flag to discount.
Second, placed the file with a lender whose policy on regionally cyclical self-employment income extends the averaging window to three years specifically for borrowers whose revenue tracks a well-documented industry cycle, referencing our two-year average walkthrough as the baseline convention being extended.
Third, packaged the submission around the full pattern:
The outcome
Approved and funded: insured at 90% LTV, 25-year amortization, 5-year fixed. For context on how this mortgage size compares nationally, see our data on the average new mortgage amount in Canada. Saskatchewan has no verified transfer-tax fact, so closing costs here stay qualitative: legal fees, registration fees and standard adjustments, budgeted alongside the same 90-day funds documentation that supported the down payment.
What to take from this file
- 01A single bust-year filing can look like decline when it is really one point in a documented cycle. This file swung from 62.3% to 43.1% TDS depending entirely on the averaging window.
- 02Contract-cycle smoothing is a different tool from an add-back. It changes which years are counted, not what counts within a single year’s figures.
- 03Regionally cyclical trades justify a documented explanation, not just a longer average. Naming the cycle turns a weak year into context rather than a concern.
- 04The qualifying rate still governs. This file qualifies at 7.29% and pays at 5.29% — a $340-a-month gap between the two payments.
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.
- ▸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.
- ▸CMHC — CMHC Home Start — minimum down payment tiers (5%/10%) and the $1.5M insured price cap.
- ▸CMHC — Purchase (Mortgage Loan Insurance) — default-insurance premium schedule by LTV band (25-year amortization).
Illustrative in this file — lender-specific, not rules:
- ▸5.29% contract rate — rates move daily; not a quote.
- ▸a three-year (rather than two-year) averaging window — a lender-specific accommodation for regionally cyclical income, not a published rule.
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.