The client
A buyer in London signed a pre-construction agreement of purchase and sale for a $525,000 condo years before the building was registered, taking interim occupancy long before final closing and paying the builder's own occupancy fees the entire time.
Purchase price
$525,000, London
10% down, insured, financed only at final closing
Interim occupancy period
Years, pre-registration
Builder's own occupancy fees paid throughout -- not a mortgage payment
Combined income
$10,300/month
Other debt
$280/mo car loan
The problem
An interim occupancy fee is not a mortgage payment. It is what a pre-construction condo buyer pays the builder to occupy the unit before the building itself is legally registered -- covering estimated taxes, common expenses and interest on the unpaid balance, with legal ownership, and any financing at all, arriving only at final closing.
What the years of occupancy fees never did
- ▸Build a single dollar of equity in the unit -- the builder, not the buyer, owned it the entire time
- ▸Count toward a mortgage that had not started yet -- there was no mortgage to make payments on
- ▸Lock in the rate or the qualifying numbers from the original agreement -- final closing requalifies on that day's own facts
A first reviewer's intake notes read the years of occupancy payments as though a mortgage were already quietly running in the background. It never was.
The numbers
Once final closing actually arrived, the math was ordinary insured-purchase arithmetic -- the only unusual part was how long the file had to wait to run it.
| Financing the purchase fresh, at final closing | Amount |
|---|---|
| Base mortgage (90% of purchase price) | $472,500 |
| CMHC premium (3.10% at 90% LTV) | +$14,648 |
| Total insured mortgage | $487,148 |
| Ratio check at the qualifying rate | Figure |
|---|---|
| Payment at the qualifying rate (6.85%), 25 years | $3,367/mo |
| GDS (payment + $395 tax + $140 heat) ÷ $10,300 income | 37.9% |
| TDS (GDS numerator + $280 car loan) ÷ $10,300 income | 40.6% |
37.9% and 40.6% sit comfortably inside CMHC's 39% GDS and 44% TDS maximums, consistent with the scale of financing Canadian housing starts data shows moving through pre-construction pipelines every year. The ratios were never in doubt once the file was actually run on final-closing facts, at a final-closing rate.
The solution
A mortgage agent licensed under Ontario's Mortgage Brokerages, Lenders and Administrators Act treated final closing as its own, fresh qualifying event -- not a formality attached to an agreement signed years earlier.
First, reconfirmed income, credit and the down payment close to the actual final-closing date, not the original agreement date -- years of pay increases, job changes and rate movement meant the file signed at the start was not the file that would actually fund.
Second, shopped and held a rate appropriate to the real, current closing timeline, rather than assuming any rate quoted at the original signing still applied.
Third, budgeted the interim occupancy fees as their own, real monthly carrying cost for the whole occupancy period, separate and distinct from the mortgage that had not started yet -- so the client understood exactly what was, and was not, building toward ownership.
The outcome
The purchase funded insured at 37.9% GDS and 40.6% TDS, financed in full only at final closing -- years after the original agreement, and years after the occupancy fees started.
Both ratios sit comfortably inside CMHC's 39% GDS and 44% TDS maximums; the file was never close to either ceiling once run on final-closing facts.
What to take from this file
- 01Interim occupancy fees are not a mortgage payment and build no equity. The builder owns the unit until the building is registered, however many years of fees the buyer has paid by then.
- 02Final closing is a fresh qualifying event, not a formality. Income, credit, rates and even the buyer's own life can all change meaningfully across a multi-year pre-construction timeline.
- 03Never assume the original agreement's rate or numbers still apply. The rate actually available at final closing is the only rate that matters to the math.
- 04Set expectations about occupancy fees at the very start. A buyer who understands they are paying carrying costs, not equity, is not surprised by what final closing actually requires.
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.
- ▸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.
- ▸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.
Illustrative in this file — lender-specific, not rules:
- ▸4.85% contract rate — rates move daily; not a quote, and the rate actually available years after the original agreement was signed is never the rate quoted at signing.
- ▸the length of the interim-occupancy period — each project sets its own occupancy-to-registration timeline; this file is illustrative of the mechanic, not a typical duration.
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.