The client
A household near Grande Prairie wanted to switch lenders at maturity and roll in a small consolidation top-up at the same time. One partner works salaried; the other receives Assured Income for the Severely Handicapped (AISH), Alberta's own program for adults with a permanent, medically adjudicated disability that limits their ability to earn a living. The switch itself was routine. The top-up was what actually mattered, because it changed which rules applied to the file.
Balance at maturity
$178,000, 18 years remaining
Renewing with a switch
Consolidation top-up requested
$12,000
Rolled into the new mortgage
Salaried partner's income
$54,000/year
Stable, same employer
AISH income
Ongoing monthly benefit
Permanent disability, indefinite duration
The problem
A straight switch — same balance, same amortization, moving to a new federally regulated lender — would have qualified for OSFI's straight-switch exemption from the minimum qualifying rate. Adding the $12,000 top-up increased the loan amount, which breaks that exemption outright: the whole file had to be fully requalified at the stress-tested rate, like any new uninsured mortgage.
What the first lender's blanket policy did to the file
- ▸First lender's policy: any income from a provincial income-assistance program is credited at 0%, full stop
- ▸AISH income, under that policy, counted for nothing in the ratio math
- ▸Total debt service ratio on the salaried income alone: 42.8% — declined under this lender's own internal comfort threshold for a file with any income-assistance component
The policy wasn't irrational on its face — a lot of provincial income assistance really is short-term, needs-tested, and reasonably excluded from qualifying income. AISH is not that. It is a permanent, legislated benefit for adults whose disability is severe and expected to last indefinitely, adjudicated medically before it is ever granted — closer in substance to a long-term disability benefit than to time-limited general welfare, which is exactly the distinction the first lender's blanket policy did not make.
The numbers
Because the top-up increases the balance, this switch cannot use OSFI's exemption for uninsured straight switches — the whole file is qualified fresh, at the minimum qualifying rate, same as a new uninsured mortgage.
| The switch-plus-top-up, two ways | Amount |
|---|---|
| New balance (existing balance + top-up) | $190,000 |
| Minimum qualifying rate on a 5.35% contract | 7.35% |
| Payment, 18-year remaining amortization | $1,576/mo |
| TDS line | AISH credited at 0% | AISH credited in full |
|---|---|---|
| Payment at MQR | $1,576 | $1,576 |
| Property tax + heat | $350 | $350 |
| Income used | $4,500/mo | $5,550/mo |
| TDS | 42.8% ✗ | 34.7% ✓ |
Both figures sit under CMHC's illustrative 44% reference for this uninsured file, but the first lender's own internal policy set its comfort line below that for any file carrying an income-assistance component — which is why 42.8% was a decline there, not a marginal pass. Qualifying at the stress-tested rate costs $210/mo more than the $1,366/mo the household will actually pay at the 5.35% contract rate.
The solution
A mortgage associate licensed through the Real Estate Council of Alberta did not treat the first lender's decline as the end of the file.
First, separated the two decisions the household was actually making. The switch alone, without the top-up, would have qualified for the straight-switch exemption and needed no income test at all — the top-up was the only reason income mattered in the first place.
Second, shopped the file to a lender with a written AISH policy, rather than accepting a blanket "income-assistance" exclusion as the final word on a benefit that is structurally different from the short-term programs such policies are usually written to guard against.
Third, documented AISH's permanent, indefinite-duration status directly from the program — not just a bank statement showing deposits, but confirmation of the benefit's basis, since that is what separates it from a time-limited assistance program in a lender's own policy language.
The outcome
Approved and funded: the switch and the $12,000 consolidation top-up closed together at 34.7% TDS once the AISH income was credited at full value. Had the household simply wanted the switch with no top-up, none of this income review would have been triggered at all — the straight-switch exemption would have applied, and the file would have closed without anyone ever looking at either partner's income -- exactly the kind of straight switch Canadian mortgage renewal statistics show happening at scale every year.
What to take from this file
- 01Any increase to the balance breaks the straight-switch exemption, even a small consolidation top-up — know this before promising a client the switch itself will stay simple once anything is added to it.
- 02Not every provincial income-assistance program is the same for lending purposes. AISH's permanent, medically adjudicated basis is a meaningfully different fact pattern from short-term, needs-tested assistance — a blanket exclusion policy can get this wrong.
- 03A lender's own comfort threshold can sit below the illustrative 44% reference on an uninsured file, especially where a policy treats a whole income category as automatically discounted.
- 04Separate what actually needs re-qualifying from what doesn't. This file's straight-switch portion never needed an income test at all — only the top-up did.
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%.
- ▸OSFI — OSFI exempts uninsured mortgage straight switches from the prescribed MQR and implements portfolio LTI limits — MQR exemption for uninsured straight switches at renewal (from Nov 21, 2024).
- ▸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:
- ▸5.35% contract rate — rates move daily; not a quote.
- ▸AISH income amount — AISH benefit levels vary by individual circumstance, not a set figure.
- ▸44% referenced as a comfortable TDS ceiling — this file is uninsured, so there is no CMHC ratio ceiling -- 44% is illustrative of common lender comfort, and this lender's own internal threshold sat below it.
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.