The client
A couple separating in Lachute held a $520,000 matrimonial home carrying a $310,000 insured mortgage -- one spouse buying out the other and keeping the home, the other buying a separate $298,000 home elsewhere.
Matrimonial home value
$520,000, Lachute
Existing $310,000 insured mortgage
Equalization payment
$105,000
Half the equity, per the separation agreement
Keeping spouse's buyout
$415,000 conventional refinance
Refinances are never eligible for default insurance
Departing spouse's new purchase
$298,000, elsewhere in Quebec
A separate, freshly insured application
The problem
Default-insurance coverage attaches to one mortgage on one specific property. It has no mechanism to follow a couple through a separation into two different transactions on two different properties.
What the couple assumed, incorrectly
- ▸The couple believed the existing insured mortgage's coverage would somehow apply, in some reduced form, to both what came next
- ▸In fact, the keeping spouse's buyout is a refinance of the existing property -- and refinances are never eligible for default insurance, regardless of equity
- ▸The departing spouse's new purchase elsewhere is an entirely separate transaction, requiring its own fresh insurance application from scratch
The matrimonial home's insurance was never going anywhere. It was never going to split in two, either.
The numbers
Once the two transactions were correctly separated, each one's own arithmetic was routine on its own terms.
| Two files, two independent treatments | Amount |
|---|---|
| Keeping spouse's new balance (existing $310,000 + $105,000 equalization) | $415,000 |
| Departing spouse's base mortgage (90% of $298,000) | $268,200 |
| Departing spouse's default-insurance premium (3.10% at 90% LTV) | +$8,314 |
| Departing spouse's total insured mortgage | $276,514 |
| Keeping spouse (conventional buyout) | Departing spouse (insured purchase) | |
|---|---|---|
| Payment at the qualifying rate | $2,932/mo (7.10%) | $1,971/mo (7.20%) |
| Property tax + heat | $430/mo | $350/mo |
| Car loan | $220/mo | $180/mo |
| Total debt service | 39.8% | 41.0% |
39.8% on the conventional buyout is informational -- refinances carry no CMHC ratio ceiling -- while the departing spouse's 38.0% GDS and 41.0% TDS clear the real 39%/44% insured maximums on a purchase built from scratch, unrelated to the original mortgage. Quebec's welcome tax on the departing spouse's own $298,000 purchase, $2,666, was owed independently as well.
The solution
A courtier hypothécaire licensed under Quebec's Act respecting the distribution of financial products and services structured the buyout and the new purchase as two entirely independent files from the outset.
First, confirmed the keeping spouse's buyout would proceed as an ordinary conventional refinance, since refinances are never eligible for default insurance regardless of the equity involved -- no insurer coverage was needed, or possible, on this leg.
Second, applied for the departing spouse's new purchase as a completely fresh insured mortgage, unrelated to the original file, using the departing spouse's own income and credit.
Third, sourced part of the departing spouse's down payment from the $105,000 equalization payment received, while confirming with the new lender that the funds' source was clearly documented as a separation-agreement equalization, not a gift.
The outcome
The buyout closed at 5.10% and 39.8% TDS as an ordinary conventional refinance, and the departing spouse's new purchase funded insured at 38.0% GDS and 41.0% TDS, with Quebec's welcome tax of $2,666 due on that purchase alone.
The buyout's 39.8% figure is informational, since refinances carry no CMHC ratio ceiling; the departing spouse's 38.0%/41.0% figures are the real, binding ones, on a purchase entirely unrelated to the original mortgage.
What to take from this file
- 01Default-insurance coverage attaches to one mortgage on one property. It cannot split, transfer, or carry over into a second, separate transaction, however connected the two feel to the couple involved.
- 02A spousal buyout refinance is never eligible for default insurance, regardless of equity. Structure it as an ordinary conventional refinance from the start.
- 03A departing spouse's new purchase elsewhere is a completely fresh insurance application. Nothing about the original mortgage's insured status carries over to it.
- 04Document an equalization payment clearly as its own source of funds. A lender needs to see it is a separation-agreement entitlement, not a gift or an undisclosed loan.
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.
- ▸Gouvernement du Québec — Droits sur les mutations immobilières — Quebec's transfer duties ('welcome tax') — 2026 indexed brackets.
- ▸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.
Illustrative in this file — lender-specific, not rules:
- ▸5.10% / 5.20% rates — rates move daily; neither is a quote.
- ▸the 50/50 equalization split — this reflects this couple's own separation agreement; equalization terms are negotiated case by case, not set by a fixed formula.
- ▸the 39.8% buyout total-debt-service figure — this is an uninsured, conventional refinance, so there is no CMHC ratio ceiling -- the number is informational.
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.