The client
A couple in Red Deer with strong, stable T4 income and a clean credit file assumed the mortgage itself would be the hard part. It wasn’t. Housing costs on their $430,000 purchase came in comfortably inside the GDS ceiling. What killed the first version of the file was four vehicle-related debts stacked on top of it.
Household income
$124,000/yr ($10,333/mo)
Both employed, stable T4 income
Existing debt load
$1,955/mo across four accounts
Two truck loans ($795 + $610), an RV loan ($340), and card minimums ($210)
Purchase
$430,000, Red Deer
As originally structured: 10% down ($43,000)
Housing ratio
GDS 29.8% at 10% down
Housing alone was never the obstacle on this file
Licensing
RECA-licensed mortgage associate
Alberta’s real estate and mortgage regulator
Insurance status
Insured file either way
Under 20% down; the only open question was which LTV band
The problem
As filed, the housing math was fine on its own — $2,658/mo in principal and interest at the qualifying rate, plus $275 property tax and $150 heat, against $10,333/mo in household income. That is a comfortable 29.8% GDS, well inside CMHC’s 39% maximum. The problem showed up the moment the couple’s existing debts were added on top.
The TDS math, as filed
- ▸Housing costs (GDS numerator): $3,083/mo
- ▸Plus two truck loans ($795 + $610), an RV loan ($340), and card minimums ($210): $1,955/mo
- ▸TDS: $5,038 ÷ $10,333 = 48.8% — against a 44% maximum. No lender or insurer discretion applies above that line.
This is the shape of a TDS decline that a stronger income or a better rate cannot fix: the 44% ceiling on an insured file is set by the insurer, not by any one lender’s house policy, so shopping the file to a friendlier institution changes nothing while the debt stack stays the same. The drag from consumer debt like this shows up nationally too, in household debt service ratio statistics. The only lever left was the debt itself.
The numbers
GDS was never in question here. TDS is where this file actually lives or dies.
| The purchase, structured at 10% down | Amount |
|---|---|
| Purchase price | $430,000 |
| Down payment (10%) | −$43,000 |
| Base mortgage (90% LTV) | $387,000 |
| CMHC premium — 3.10% in the 85.01–90% LTV band, capitalized | +$11,997 |
| Total insured mortgage | $398,997 |
Contract rate (illustrative, not a quote): 4.44%. Minimum qualifying rate: 6.44%. Monthly P&I at the qualifying rate: $2,658.
Alberta has no land transfer tax; Land Titles Office registration fees apply on a small sliding scale at closing instead, kept qualitative here rather than quoted as a specific figure.
GDS — comfortable, either way
| GDS at 10% down | Monthly |
|---|---|
| P&I at the qualifying rate | $2,658 |
| Property tax | $275 |
| Heat (lender-standard estimate) | $150 |
| Housing costs $3,083 ÷ income $10,333 → GDS 29.8% | ✓ |
TDS — where four debts collide with the 44% cap
| TDS at 10% down | Monthly |
|---|---|
| Housing costs (GDS numerator) | $3,083 |
| Truck loan #1 | $795 |
| Truck loan #2 | $610 |
| RV loan | $340 |
| Card minimums | $210 |
| TDS vs. the 44% cap | 48.8% ✗ |
The restructured file — sell the RV, pay out the smaller truck
Selling the RV and paying out the smaller truck loan from what would otherwise have gone to the down payment cuts the down payment from 10% to roughly 6% — which crosses into a higher default-insurance LTV band, the kind of trade-off mapped in full in how 5% versus 20% down actually changes a file. Both effects have to be priced together.
| Restructured purchase | Figure |
|---|---|
| Down payment, reduced to fund the payout | $26,000 |
| Base mortgage (94% LTV) | $404,000 |
| CMHC premium — 4.00% in the 90.01–95% LTV band, capitalized | +$16,160 |
| Total insured mortgage | $420,160 |
Same 6.44% qualifying rate, new monthly P&I at $2,799 — a $141/mo increase over the original $2,658, and a $4,163 more expensive premium ($16,160 vs. $11,997) on a loan that is $21,163 larger. That is the real price of compliance, and it belongs in front of the client before they agree to the trade.
TDS after — the trade that worked
| TDS after restructuring | Monthly |
|---|---|
| Housing costs (P&I $2,799 + tax $275 + heat $150) | $3,224 |
| Truck loan (kept) | $795 |
| Card minimums | $210 |
| TDS vs. the 44% cap | 40.9% ✓ ($4,229 ÷ $10,333) |
Even at 6% down, this file still cleared Canada’s regulatory minimum down payment for a $430,000 purchase — $21,500, or 5% — with room. Reducing the down payment to fund the debt payout was a choice the couple made, not something regulation forced on them.
The solution
A RECA-licensed mortgage associate modelled both versions of the file side by side before recommending either.
First, confirmed there was no lender-shopping fix. At 48.8% TDS against a 44% insurer ceiling, no institution has discretion to approve the file as filed — this had to be solved by changing the debt, not the destination.
Second, built the trade-off table. Selling the RV and paying out the smaller truck loan from down-payment funds would clear TDS, but it also meant less money down, a higher default-insurance premium band, a larger loan, and a higher payment. Showing all four consequences together, not just the TDS win, is what made the recommendation honest.
Third, packaged the proof of the restructuring. An underwriter needs to see the debt is actually gone, not just promised to be paid.
The outcome
Approved insured at 40.9% TDS, with room to the 44% cap. Alberta charges no land transfer tax on the purchase — Land Titles Office registration fees apply instead, on a small sliding scale, kept qualitative here rather than quoted as a specific figure. The couple went into closing knowing exactly what the debt restructuring had cost them in premium and payment, not just what it had bought them in approval.
What to take from this file
- 01TDS above the insured cap is a hard stop, not a negotiation. Once GDS is fine but TDS fails at 48.8% against a 44% ceiling, no lender has room to approve the file as filed — solve the debt, not the search for a friendlier institution.
- 02Debt restructuring can quietly shift the down payment and the premium band. Paying out a loan from down-payment funds fixed the TDS here, but it also pushed the file from a 3.10% to a 4.00% premium band — always price both effects together.
- 03Small recurring debts add up exactly like a mortgage does. Four vehicle-related payments totalling $1,955/mo did more damage to this file than the mortgage itself.
- 04Know the regulatory minimum down payment before restructuring around it. Even after reducing the down payment to fund the payout, this file’s 6% still cleared Canada’s 5% floor on a sub-$500,000 purchase comfortably.
- 05Show the price of compliance, not just the result. The fix here wasn’t free — a bigger premium, a bigger loan, and a higher payment — and the client deserved to see that trade before committing to it.
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:
- ▸4.44% contract rate — illustrative, not a quote.
- ▸Paying out a loan from down-payment savings — the right split depends on rates and the specific file.
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.