The client
A homeowner in Brantford needed $52,000 and took a private second mortgage at 10.5%, alongside an existing $265,000 first mortgage. The private lender funded six months of interest directly into the loan as an interest reserve, so no payment was due for half a year.
First mortgage
$265,000
Existing balance, unaffected
Net advance received
$52,000
What actually reached the borrower
Interest reserve
$2,730
6 months of interest, capitalized into the loan
Quoted rate
10.5%
Interest-only, on the full registered principal
Combined income
$9,100/month
Both salaried
The problem
For six months, this loan cost the borrower nothing at all -- no monthly payment ever left their account, because the lender had already funded those payments to itself out of the reserve. That made the private second feel free for as long as the reserve lasted, which is exactly the problem: interest was accruing the entire time on the loan's full, reserve-inflated principal, and nothing about the $0/mo experience prepared the borrower for what would happen once the reserve was gone.
What the reserve actually did, and didn't, change
- ▸Net advance to the borrower: $52,000 -- what actually reached their account
- ▸Interest reserve, capitalized into the loan: $2,730 -- six months of interest, funded by the lender to itself
- ▸Registered face principal: $54,730 -- what interest was accruing against from day one, reserve included
This isn't the same problem as a private lender's fee distorting the loan's true cost of borrowing -- the rate here is exactly what it says it is. The risk is a payment CLIFF: nothing due for six months, then a full interest-only payment landing all at once, with no ramp between the two.
The numbers
The reserve's own size and the payment it was hiding are two different numbers, and the gap between them is the entire point of this file.
| The reserve, and what it was masking | Amount |
|---|---|
| Net advance to the borrower | $52,000 |
| Monthly interest on the net advance, at 10.5% | $455/mo |
| Interest reserve (6 months, capitalized) | +$2,730 |
| Registered face principal | $54,730 |
| Monthly interest once the reserve depletes, on the face principal | $479/mo |
The reserve was sized against the $455/mo interest on the $52,000 the borrower actually used -- but once it runs out, interest keeps accruing on the larger $54,730 face principal, so the real ongoing cost the borrower would suddenly owe is $479/mo, not the $455 the reserve itself was calculated from.
Sizing the exit before the cliff
| The consolidated refinance | Figure |
|---|---|
| Existing first mortgage balance | $265,000 |
| Private second's full face principal | $54,730 |
| New consolidated balance | $319,730 |
| Minimum qualifying rate on a 5.05% contract rate | 7.05% |
| Qualifying payment, 25 years | $2,249/mo |
Total debt service on the consolidated balance comes to 33.2% of the household's $9,100 income -- informational only, since this is an uninsured refinance with no CMHC ratio ceiling.
The solution
A mortgage broker calculated the reserve's exact depletion date from the note's own advance schedule, rather than waiting for a payment notice to arrive.
First, separated the net advance from the face principal. Confirmed with the private lender's commitment letter exactly how much of the $54,730 registered balance was cash the borrower used versus interest capitalized on their behalf.
Second, calculated the real ongoing cost once the reserve runs out. $479/mo on the face principal, not the $455/mo the reserve was originally sized against -- the gap is small in dollars but real, and it lands with zero notice if nobody calculates it in advance.
Third, sized and closed a consolidated A-lender refinance before a single reserve-funded payment was missed, retiring the private note's full face principal together with the existing first mortgage.
The outcome
A consolidated refinance of $319,730 funded at 5.05%, retiring the private note's full face principal together with the existing first mortgage, ahead of the reserve's depletion date. Total debt service settled at 33.2%.
Because this is an uninsured refinance, CMHC's ratio maximums don't apply here; the 33.2% figure is informational, not a pass/fail line.
What to take from this file
- 01An interest reserve funds the lender's own payments to itself, not a discount to the borrower. $0/mo out of pocket is not the same thing as a loan that costs nothing.
- 02Interest accrues on the full face principal from day one, reserve included. The payment that appears once the reserve depletes is larger than the number the reserve itself was calculated from.
- 03Calculate the depletion date from the advance schedule, not from when a payment notice shows up. Exiting before the cliff is a planning problem, not a reaction to one.
- 04This is a different mechanic from a capitalized fee distorting the cost of borrowing. The rate here is exactly what it says; the risk is a payment cliff, not a disclosure gap.
- 05Ask every private-second client whether an interest reserve is funding their current payments. A file that looks calm today can still be running toward a hard date.
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:
- ▸10.5% / 5.05% rates — rates move daily; neither is a quote.
- ▸the 6-month reserve period and its size — private lenders set their own interest-reserve terms deal by deal; this figure is illustrative, not a schedule.
- ▸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.