The client
A three-weeks-on, three-weeks-off offshore worker on a T4 salary of $91,200 a year, buying a first home in a suburb of St. John’s. During his weeks ashore he runs a small equipment-repair sole proprietorship — two filed years, growing from $13,800 to $18,600 net. Clean credit, a car loan and a personal line of credit are his only other obligations.
Employment
Offshore-rotation T4, $91,200/yr
Same employer, multi-year rotation schedule
Side business
Sole proprietorship, 2 filed years
Net $13,800 then $18,600 — growing
Credit picture
Mid-700s, no delinquencies
Car loan $520/mo, personal LOC $410/mo
Purchase
$365,000, St. John’s
Property tax $210/mo; lender heat estimate $120/mo
Down payment
$36,500 — 10%
Under 20%, so the file must be default-insured
Regulator
NL Superintendent of Mortgage Brokerages and Mortgage Brokers
New Act and rules in force since April 1, 2025
The problem
The applicant’s own bank was comfortable with the T4 salary on its own. The trouble was the side business: the underwriter’s policy on this file was that a sole proprietorship run alongside full-time T4 employment needed three consecutive filed years before any of its income could be blended in — treating two years as unproven, closer to a hobby than a going concern.
Counting only the T4
- ▸Income used: $91,200/yr ÷ 12 = $7,600/mo — the side business excluded entirely
- ▸Liabilities: mortgage payment at the qualifying rate, property tax and heat, plus the $520 car loan and $410 line of credit
- ▸TDS: 47.5% against CMHC’s 44% maximum. Declined.
That three-year bar is stricter than the convention most Canadian lenders actually apply. As our own walkthrough of a self-employed two-year average lays out, two consecutive filed years is the standard most A-lenders use for blending self-employment income — not three. The client had exactly that: two clean, growing years. The bank’s underwriter was simply applying a more conservative internal bar than the industry norm, and reading it as though it were the rule.
The numbers
At 10% down this is an insured file, so CMHC’s maximums — GDS 39%, TDS 44% — are hard numbers, not lender preferences.
| Structuring the insured loan | Amount |
|---|---|
| Purchase price | $365,000 |
| Down payment (10%) | −$36,500 |
| Base mortgage (90% LTV) | $328,500 |
| CMHC premium — 3.10% in the 85.01–90% LTV band, capitalized | +$10,184 |
| Total insured mortgage | $338,684 |
The minimum down payment at this price is $18,250 — 5% of the purchase price, since $365,000 sits under the $500,000 tier boundary — so $36,500 clears it comfortably.
| Rate & payments | Figure |
|---|---|
| Contract rate — 5-year fixed (illustrative, not a quote) | 4.89% |
| Minimum qualifying rate — greater of contract + 2% and 5.25% | 6.89% |
| Monthly P&I at the qualifying rate — the ratios run on this | $2,349 |
| Monthly P&I at the contract rate — what he actually pays | $1,949 |
Income — two lenses on the same file
| Income treatment | Monthly |
|---|---|
| T4 salary only | $7,600 |
| T4 salary | $7,600 |
| Side business, two-year average ($13,800 + $18,600 ÷ 2 = $16,200/yr) | +$1,350 |
| Corrected qualifying income | $8,950 |
TDS — where the two treatments part ways
| TDS line | T4 only | T4 + averaged side income |
|---|---|---|
| Housing costs (PI + tax + heat) | $2,679 | $2,679 |
| Car loan + personal line of credit | $930 | $930 |
| Income used | $7,600 | $8,950 |
| TDS vs. the 44% cap | 47.5% ✗ | 40.3% ✓ |
GDS on the corrected income comes to 29.9% — well under the 39% cap, and never in question. TDS was always the binding constraint, and the side business was the only lever that could move it.
The solution
An NL-licensed mortgage broker, registered under the province’s Superintendent of Mortgage Brokerages and Mortgage Brokers, took the file on two tracks at once.
First, separated policy from rule. The bank’s three-year bar for side self-employment income was a house policy, not an insurer requirement. Our guide to calculating self-employed income from a T1 and T2 walks through exactly which lines a two-year average draws on, and two clean filed years is what most lenders ask for — which is what this file already had.
Second, placed the file with a lender that used the standard convention. Rather than waiting a full extra tax year for the side business to reach a third filed year, the broker moved the file to a lender whose documented policy blends a two-year self-employed average alongside continuous full-time T4 income — the same convention used across most Canadian self-employed underwriting, at a broker channel that our data on mortgage broker market share shows places a large and growing share of Canadian mortgages precisely because it can shop this kind of policy difference.
Third, built a submission with no ambiguity left in it.
The rotation schedule mattered more than it might seem: an underwriter unfamiliar with offshore work can misread weeks ashore as unpredictable availability rather than a fixed, contracted cycle. Spelling it out up front closed that question before it was asked.
The outcome
Approved and funded: insured at 90% LTV, 25-year amortization, 5-year fixed. The side business’s third filed year, when it eventually lands, will only strengthen the file at renewal — it was never the obstacle the first bank made it out to be.
Newfoundland and Labrador has no verified transfer-tax fact, so closing costs here stay qualitative: legal fees, title insurance and standard adjustments, budgeted with the same 90-day funds documentation that supported the down payment.
What to take from this file
- 01Two filed years is the standard convention for blending self-employment income — not three. A lender that asks for more is applying its own house policy, not an industry rule.
- 02Side self-employment income needs its own documented history, even when the main job is a T4. Two years of T1s and NOAs for the side business carried this file once it reached the right lender.
- 03The qualifying rate, not the contract rate, decides the ratios. This file qualifies at 6.89% and pays at 4.89% — a $400-a-month gap between the payment that sets TDS and the payment that hits the bank account.
- 04A decline is a statement about one lender’s policy, not the file. Re-running the same numbers under the standard convention, rather than the stricter one, is often the entire fix.
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:
- ▸4.89% contract rate — rates move daily; not a quote.
- ▸a three-year bar on side self-employment income — a bank policy choice, not a regulatory 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.