The client
A Selkirk, Manitoba investor with a rental-property mortgage maturing, $6,900/month of his own T4 income, and a tenant paying $1,800/month whose one-year lease had just lapsed into month-to-month. The property itself hadn't changed — only the paper describing the tenancy had.
Applicant's own income
$6,900/month T4
Principal-residence mortgage, tax and heat separate
Rental mortgage
$260,000 balance, uninsured
20 years remaining amortization; straight switch, no increase
Tenant
$1,800/mo rent
Fixed-term lease recently lapsed into month-to-month
Rental carrying costs
Tax $220/mo; insurance/misc $80/mo
On top of the mortgage payment
The problem
A rental offset credits a percentage of a property's rent against its own carrying costs — and the percentage a lender is willing to credit depends heavily on how certain that rent actually is to continue. A signed fixed-term lease is treated very differently from a tenancy that could end with 30 days' notice.
The same tenant, two different offsets
- ▸Rent unchanged: $1,800/month, same tenant, same unit
- ▸Month-to-month tenancy, no signed fixed term: lender credits a 50% offset — $900/month against the property's carrying costs
- ▸A signed fixed-term lease would credit an 80% offset — $1,440/month — on the identical rent
The straight switch on the rental mortgage itself was never in doubt — no increase in the $260,000 balance, no extension of the amortization, so it was exempt from the minimum qualifying rate regardless of the lease question. What the lease type actually decided was how much of the property's own rent counted toward covering its own costs.
The numbers
The mortgage payment itself is identical either way — the entire gap between the two outcomes comes from how much of the same $1,800 monthly rent gets credited.
| The rental's carrying costs against its own rent | Amount |
|---|---|
| Rental mortgage balance | $260,000 |
| Straight-switch rate (exempt from MQR) | 5.15% |
| Payment on the rental mortgage, 20 years | $1,730/mo |
| Rental carrying costs (payment + tax + insurance/misc) | $2,030/mo |
| Rental offset | Month-to-month (50%) | Renewed fixed-term lease (80%) |
|---|---|---|
| Rent credited | $900 | $1,440 |
| Net rental shortfall (carrying costs less rent credited) | $1,130 | $590 |
| Total debt service (own housing + net rental shortfall ÷ own income) | 46.5% ✗ | 38.7% ✓ |
The rent itself never moved. Renewing the fixed-term lease turned $540 a month of already-existing rent from uncredited to credited, which is the entire seven-point-plus swing in total debt service.
The solution
A mortgage broker licensed in Manitoba treated the lapsed lease, not the mortgage or the tenant's reliability, as the fixable problem.
First, confirmed the tenant intended to stay regardless of paperwork. The month-to-month arrangement wasn't a sign of an unstable tenancy — the lease had simply lapsed without anyone renewing it, while the tenant kept paying on time every month.
Second, recommended a renewed one-year fixed-term lease before submitting the file. The tenant agreed readily, since nothing about their actual living situation was changing — only the document restoring the higher offset treatment a signed fixed term earns.
Third, avoided the alternative path of simply lender-shopping for a month-to-month-friendly offset. Some lenders will credit a long-tenured month-to-month tenant more generously with enough rent-payment history behind it, a comparison covered in general terms in a rental offset that failed at one lender and passed cleanly at another — but fixing the lease itself was faster and more durable than searching for a lender willing to work around it.
The outcome
With the renewed fixed-term lease in hand, the offset moved from 50% to 80%, and total debt service fell to 38.7% — the switch cleared on the strength of the same rent, credited differently once the lease itself changed.
Manitoba's rental market carries its own vacancy pressures, tracked in the same rental vacancy statistics lenders reference nationally — but this file's outcome turned entirely on documentation, not on any change in market conditions.
What to take from this file
- 01A lease type can move a rental offset by tens of points, on identical rent. The same $1,800/month tenant priced out at a 50% or an 80% offset purely on the strength of the lease's paper.
- 02A month-to-month tenancy is not the same thing as an unreliable one. This tenant paid on time every month regardless — the lease had simply lapsed, and renewing it was a paperwork fix, not a tenant-screening one.
- 03A straight switch on a rental mortgage is exempt from the stress test on the same terms as any other uninsured switch. The balance and amortization drove that question; the lease type drove a completely separate one.
- 04Fixing the underlying document is often faster than shopping around it. A signed lease renewal solved the offset question directly, rather than searching for a lender willing to treat a month-to-month tenancy more generously.
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 — 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).
- ▸OSFI — Minimum qualifying rate for uninsured mortgages — the minimum qualifying rate — greater of contract rate + 2% or 5.25%.
- ▸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:
- ▸5.15% contract rate — rates move daily; not a quote.
- ▸50% / 80% rental-income offset — each lender sets its own offset percentage for a month-to-month tenancy versus a documented fixed-term lease.
- ▸the 44% comfort reference — this file is uninsured, so there is no CMHC ratio ceiling — the number is a lender comfort convention, not a regulatory pass/fail line.
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.