The client
A sole proprietor selling and servicing farm equipment out of a single shop in Chatham-Kent — six years in business, the same suppliers, a client base of local growers who come back every planting and harvest season. His spouse works full-time on T4. The plan was straightforward: buy a home at 10% down and qualify the mortgage on two years of T1 self-employment income, the standard convention for a sole proprietor without two years of steady, comparable net income.
Borrower
Sole proprietor, farm-equipment sales & service
6 years operating; spouse on T4
Spouse's income
$4,500/mo T4
Stable, multi-year employment
Year 1 T1 net
$36,000
After a one-time $34,000 CCA claim
Year 2 T1 net
$60,000
No major capital purchase that year
New purchase
$520,000, Chatham-Kent
Property tax $340/mo; lender-standard heat $130/mo
Down payment
$52,000 — 10%
Above the $27,000 minimum this price requires
The two T1 years, side by side — the year that looked weak is the one with the equipment purchase:
| Business income | Year 1 | Year 2 |
|---|---|---|
| Reported T1 net income | $36,000 | $60,000 |
| One-time CCA (new service truck & diagnostics rig) | $34,000 | — |
| Adjusted net once the one-time CCA is added back | $70,000 | $60,000 |
The problem
The first lender ran the file the standard way: average the two most recent T1 years and use the result as qualifying income. Year 1's reported net of $36,000 looked like a soft year for a business that had, in Year 2, cleared $60,000 — and a straight average of the two produces just $4,000/mo, not enough to clear CMHC's ratio caps at the target price.
What the straight average actually punished
- ▸Straight 2-year average: ($36,000 + $60,000) ÷ 2 ÷ 12 = $4,000/mo
- ▸Combined with the spouse's income: $8,500/mo
- ▸GDS at that income: 44.4% — against CMHC's 39% maximum. TDS: 48.9% — against the 44% maximum. Declined.
The $34,000 gap between the two years was not a bad sales-and-service season. It was a single, documented CCA claim on a new service truck and a diagnostics rig — a legitimate deduction that lowers taxable income exactly as it is supposed to, but says nothing about whether the business can support a mortgage payment. A straight average has no way to tell the difference between a business that earned less and a business that spent capital.
The numbers
At 10% down this is an insured file, so GDS 39% and TDS 44% are hard CMHC ceilings, not lender preferences.
| Structuring the insured loan | Amount |
|---|---|
| Purchase price | $520,000 |
| Down payment (10%) | −$52,000 |
| Base mortgage (90% LTV) | $468,000 |
| CMHC premium — 3.10% in the 85.01–90% LTV band, capitalized | +$14,508 |
| Total insured mortgage | $482,508 |
| Rate & payments | Figure |
|---|---|
| Contract rate — 5-year fixed (illustrative, not a quote) | 4.75% |
| Minimum qualifying rate — contract + 2% | 6.75% |
| Monthly P&I at the qualifying rate — the ratios run on this | $3,305 |
| Monthly P&I at the contract rate — what he actually pays | $2,738 |
GDS and TDS, before and after the add-back
| Ratio | Straight average (declined) | With the CCA added back (approved) |
|---|---|---|
| Self-employed income used | $4,000/mo | $5,417/mo |
| Combined with spouse's $4,500/mo | $8,500/mo | $9,917/mo |
| GDS ($3,305 + $340 + $130 ÷ income) | 44.4% | 38.1% |
| TDS (GDS numerator + $380 car loan ÷ income) | 48.9% | 41.9% |
Both figures use the identical qualifying payment of $3,305/mo. The only variable across the two columns is whether the one-time CCA claim is added back to Year 1 before the two years are averaged — a policy call, not a different set of facts, and it is how a self-employed two-year average is meant to work when one year carries a genuine capital-cost anomaly.
The solution
An FSRA-licensed Ontario mortgage agent re-read the T1s line by line rather than accepting the declined lender's average at face value.
First, isolated the anomaly. Year 1's Statement of Business Activities showed exactly what drove the low net: a $34,000 capital-cost-allowance claim tied to one new service truck and one diagnostics rig, both purchased and put into use that year. Everything else — parts sales, service billings, supplier terms — tracked in line with Year 2.
Second, added the one-time CCA back before averaging, following the same add-back logic lenders already apply to standard vehicle and home-office claims: a non-cash, non-recurring deduction does not reduce the cash actually available to the business. Adjusted, Year 1 reads $70,000, not $36,000, and the two-year blend rises to $5,417/mo.
Third, packaged the anomaly so no underwriter had to guess. The submission included the equipment invoices, the CCA schedule from the T2125, and a one-page note showing the add-back arithmetic the same way any self-employed income calculation should be shown, not asserted.
The outcome & the closing math
Approved and funded insured at 90% LTV, 25-year amortization, 5-year fixed term. The last piece of broker work was making sure the down payment covered closing cash beyond itself:
| Cash due at closing (beyond the down payment) | Amount |
|---|---|
| Ontario land transfer tax on $520,000 — marginal brackets, no first-time-buyer refund on a repeat purchase | $6,875 |
| Ontario RST on the insurance premium — 8% × $14,508; the premium is capitalized, the tax on it is not | $1,161 |
| Legal fees, title insurance & adjustments | varies |
The $52,000 down payment clears the $27,000 minimum this price requires with room to spare, which is exactly the margin the lender wanted to see once the income question was resolved.
What to take from this file
- 01A straight self-employed average cannot distinguish a weak year from a capital-purchase year. Read the T2125's CCA line before accepting a two-year average at face value.
- 02Add back what is non-cash and non-recurring, not what is merely large. A $34,000 CCA claim tied to a specific, invoiced asset purchase is a defensible add-back; a vague claim that a year was “unusual” is not.
- 03The qualifying-rate payment, not the contract payment, decides the ratios. This file qualifies at 6.75% and pays at 4.75%.
- 04Document the anomaly, don't just state it. Invoices and a CCA schedule turned a plausible add-back into an approved one.
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.
- ▸Ontario.ca — Retail Sales Tax: Insurance and Benefits Plans — 8% Ontario RST on default-insurance premiums, cash at closing.
- ▸Ontario.ca — Calculating Land Transfer Tax / Land Transfer Tax Refunds for First-Time Homebuyers — Ontario's marginal land transfer tax brackets and first-time-buyer refund.
- ▸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:
- ▸4.75% contract rate — rates move daily; not a quote.
- ▸adding the one-time CCA back before averaging — each lender sets its own policy for treating a single large, non-recurring capital deduction inside a self-employed average.
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.