The client
A household in Sault Ste. Marie holds a $255,000 mortgage, having locked a renewal rate of 5.15% several months before maturity through their lender's own early-renewal offer -- a common way to remove uncertainty, taken well before anyone could know which way rates would move next.
Balance at renewal
$255,000
Rate locked early
5.15%
Through the lender's early-renewal offer, months before maturity
Market rate by the actual renewal date
4.55%
On a comparable term
Other debt
$260/mo car loan
The problem
An early-renewal lock removes the uncertainty of waiting, but it also fixes a household to whatever the market looks like on the day they lock -- and most lenders that offer early renewal also publish a rate-drop guarantee letting that locked rate fall if the market moves lower before the mortgage actually funds.
What the early lock left on the table
- ▸The household locked 5.15% several months before their actual renewal date, through the lender's early-renewal offer
- ▸By the real renewal date the market had moved to 4.55% on a comparable term -- a full half-point lower
- ▸The lender's rate-drop guarantee, which would let the locked rate fall to match, is not applied automatically; without a formal request before funding, the file would simply renew at the stale, higher rate
Nothing about the early lock was a mistake -- it protected the household from a worse outcome if rates had risen instead. The gap only opened because nobody circled back to check the guarantee once the market moved the other way.
The numbers
Once the market's actual movement was confirmed, invoking the rate-drop guarantee was a formality -- but only because someone checked for it before the renewal funded.
| Locked versus corrected | Amount |
|---|---|
| Payment at the locked 5.15% rate | $1,608/mo |
| Payment at the corrected 4.55% rate | $1,524/mo |
| Monthly difference | $84/mo |
| Total debt service, at the corrected rate | Figure |
|---|---|
| Payment at 4.55%, 22 years remaining | $1,524/mo |
| Property tax and heat | $430 |
| Total debt service | 27.0% |
As a straight switch of an existing uninsured mortgage with no increase in balance or amortization, this renewal qualified without a fresh stress test. The entire value of this file was in the $84/month -- $1,008 over the first year alone -- the rate-drop guarantee put back in the household's pocket before the renewal ever funded.
The solution
A mortgage agent licensed under Ontario's Mortgage Brokerages, Lenders and Administrators Act tracked the market against the early-locked rate right up to the actual funding date, rather than treating the lock as settled the day it was signed.
First, confirmed the lender's exact rate-drop guarantee terms in writing. Not every early-renewal offer carries one, and the ones that do vary in how and when a borrower has to invoke it.
Second, tracked the comparable market rate through to the actual renewal date. Confirmed the 4.55% figure was a genuine, current comparable rate, not a promotional teaser.
Third, formally invoked the guarantee before the renewal funded. Submitted the request in writing well ahead of the funding date, rather than assuming the lender would apply it on its own.
The outcome
The renewal funded at the corrected 4.55% rate, with total debt service at 27.0% and the $84/month difference kept in the household's pocket rather than the lender's, for the life of the new term, consistent with the Canadian mortgage renewal statistics tracked more broadly.
As a straight switch with no increase in loan amount or amortization, this renewal was exempt from a fresh stress test; 27.0% reflects the payment at the corrected contract rate.
What to take from this file
- 01An early-renewal lock is not the end of the conversation. If the lender's offer includes a rate-drop guarantee, the file isn't finished until someone checks the market again right before funding.
- 02A rate-drop guarantee is a lender-specific feature, not a universal one. Confirm the exact terms and the deadline to invoke it in writing -- don't assume every early-renewal offer works the same way.
- 03The guarantee is not applied automatically. Submitting the request before funding is the borrower's -- and the broker's -- responsibility, not the lender's.
- 04A straight switch with no change in balance or amortization can skip the stress test entirely. This file's value was in the rate correction, not in requalifying from scratch.
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.
- ▸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).
Illustrative in this file — lender-specific, not rules:
- ▸5.15% / 4.55% rates — rates move daily; neither is a quote.
- ▸the lender's rate-drop guarantee and its terms — each lender sets its own early-renewal and rate-drop-guarantee policy; this is not a universal or regulator-mandated feature.
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.