The client
A homeowner in Thunder Bay refinanced a $285,000 first mortgage at 4.75%, with no cash out and no increase, alongside an existing $55,000 private second still well within its own term.
First mortgage balance
$285,000
Refinancing, no cash out, no increase
Private second balance
$55,000
Still well within its own term
What the homeowner assumed
The second would be untouched by the first's refinance
Not stated in the second's own commitment letter
Rate on the refinance
4.75%
Not a quote
The problem
The homeowner assumed the private second would be untouched, since nothing about it was changing — no cash out, no increase in the first mortgage's own amount. But the private second's own original commitment letter carried a due-on-REFINANCE clause, distinct from the usual due-on-sale language, entitling the private lender to call the full $55,000 balance due the moment the first mortgage was refinanced at all.
Why a clean refinance still touched the second
- ▸A due-on-sale clause triggers only when the property itself is sold or transferred
- ▸A due-on-refinance clause is broader — it can trigger on refinancing a PRIOR-ranking charge, sale or not
- ▸This second's own postponement agreement with the first lender was tied to the specific first mortgage being refinanced, not the arrangement generally
This is a different exposure than a second mortgage file more commonly hits at exit — nothing here was maturing, defaulting, or being sold; the trigger was simply touching the first.
The numbers
Because this is an uninsured refinance, CMHC's ratio maximums don't apply directly — the real number that mattered here was the gap between a forced payout and the fee the private lender actually accepted.
| What the due-on-refinance clause could have cost, versus what it did | Amount |
|---|---|
| Private second balance, if called due in full | $55,000 |
| Postponement fee actually negotiated | $750 |
| Difference — the value of catching the clause early | $54,250 |
| Qualifying payment on the refinanced first | $1,952/mo |
| TDS on the refinance | 28.9% |
| Qualifying at the stress-tested rate | Figure |
|---|---|
| Minimum qualifying rate on a 4.75% contract rate | 6.75% |
| Payment at the qualifying rate, 25 years | $1,952/mo |
| TDS (payment + $310 tax + $135 heat + $260 car loan) ÷ $9,200 income | 28.9% |
TDS at 28.9% is informational only, since this uninsured refinance carries no CMHC ratio ceiling — the mortgage math was never the risk here. The real number is the $54,250 gap between a forced full payout and the postponement fee actually negotiated, a scale of exposure consistent with how much private lending now sits behind institutional first mortgages across Canada.
The solution
A mortgage broker read the ORIGINAL private commitment letter, not just the registered mortgage instrument, before letting the first mortgage's refinance proceed.
First, found the due-on-refinance language in the commitment letter's own fine print. It wasn't in the registered charge itself — only in the underlying agreement.
Second, contacted the private lender before closing, not after. Disclosing the planned refinance up front gave the lender a reason to negotiate rather than simply enforce.
Third, negotiated a fresh postponement agreement for a fee, instead of triggering the acceleration clause. The private lender kept its second-position charge in place, at a fraction of what calling the loan due would have meant for the homeowner.
The outcome
The private lender signed the new postponement agreement for $750, the first mortgage refinanced at 4.75% with the second left fully in place, and TDS settled at 28.9% — informational only, since this uninsured refinance carries no CMHC ratio ceiling.
Not every private lender's commitment letter carries a due-on-refinance clause, and even where one exists, whether a lender enforces it or negotiates a postponement fee is that lender's own choice, not a standard term.
What to take from this file
- 01A due-on-refinance clause is broader than the more familiar due-on-sale. It can trigger on refinancing a prior-ranking charge alone, with no sale involved at all.
- 02Always read the ORIGINAL private commitment letter, not just the registered mortgage. An acceleration clause like this often lives in the underlying agreement, not the charge itself.
- 03Disclose a planned refinance to a private second-lien holder before closing, not after. Advance notice turns an enforcement risk into a negotiation.
- 04Price the postponement fee as the real cost of a clean refinance. It's small here, but the alternative — a forced full payout — is not.
- 05Ask whether any existing private second has its own due-on-refinance language before touching the first at all. Assuming 'nothing about the second is changing' isn't the same as confirming 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.
- ▸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:
- ▸4.75% rate — rates move daily; not a quote.
- ▸the $750 postponement fee — each private lender sets its own fee for re-signing a postponement agreement; this figure is illustrative, not a tariff.
- ▸the total debt service figure — this file is an uninsured 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.