A $400,000 condo does not cost $400,000. It costs $400,000 plus a set of fees nobody puts in the listing, and it commits you to a monthly number that is rarely the one you were quoted.
None of this is hidden. It is just scattered across a lender, a notary, a municipality and an insurer, and no one of them shows you the total. Here it is in one place.
The down payment is tiered, not a percentage
Most people know “20% to avoid insurance” and “5% minimum”. Both are true, and neither is the whole rule. The legal minimum in Canada is tiered:
- 5% on the portion up to $500,000
- 10% on the portion between $500,000 and $1.5M
- 20% at $1.5M and above
So a $700,000 property needs $45,000 — 5% of the first $500,000, plus 10% of the remaining $200,000. Not $35,000. People miss this by a full $10,000 and find out late.
Above $1.5M there is no tier, because there is no mortgage insurance available at all. The 20% is not a preference, it is the only option.
Under 20%, you are also buying insurance
Below a 20% down payment the mortgage must be insured. The premium scales with how much you are borrowing against the property:
| Loan-to-value | Premium |
|---|---|
| 80.01% – 85% | 2.80% |
| 85.01% – 90% | 3.10% |
| 90.01% – 95% | 4.00% |
Two things about this premium surprise people.
It is added to your loan. You do not write a cheque for it — you borrow it, and you pay interest on it for the next 25 years.
Its sales tax is not. In Quebec, the 9% QST on that premium is due in cash at closing. On our $400,000 example with 10% down, that is an $11,160 premium folded into the mortgage and $1,004 you need in your account on closing day that nobody mentioned.
The welcome tax is not a flat percentage
The droits de mutation — the welcome tax — is the cost most often quoted wrong, usually as “about 1.5% of the price”. It is not a flat rate. It is progressive, applied bracket by bracket:
- 0.5% up to $61,500
- 1% from $61,500 to $307,800
- 1.5% above $307,800
Montreal adds its own municipal brackets above $552,300, so a more expensive property in the city pays more than the provincial table alone would suggest.
The flat-rate shortcut is not conservative — it is simply wrong, and it is wrong in the direction that scares people off. On a $269,000 purchase, “1.5%” says $4,035. The real brackets say $2,383. That is $1,652 of budget you were told to set aside for nothing.
Thresholds are indexed every January, so a figure you looked up two years ago is already stale.
The fees that never appear in a listing
For a typical Quebec purchase, before you own anything:
| Item | Typical |
|---|---|
| Notary | $1,300 – $2,000 |
| Inspection | $500 – $900 |
| Adjustments to the seller | varies — prepaid taxes, condo fees |
| Moving, connections, immediate repairs | varies |
Individually small. Together, usually more than the inspection you were budgeting for.
And then the monthly payment is not what you were quoted either
This one is a genuine technical difference, not an oversight.
Canadian fixed-rate mortgages compound semi-annually, not monthly. The periodic rate is (1 + rate/2)^(2/12) − 1, not rate/12. Most online calculators — including large, well-known ones — use the American monthly-compounding formula.
The gap is modest per payment and grows with the loan: about $7 a month on a $300,000 loan at 4.5%, about $19 a month on $500,000 at 5.5%. Over a 30-year amortization the first is roughly $2,700.
It will not change whether you can afford the place. It will change whether the number you have been planning around is the number your lender uses.
Putting it together
A $400,000 condo in Montreal, 4.5% over 25 years, with $250/month in condo fees, $3,400 in municipal tax and $380 in school tax:
| Item | 20% down | 10% down |
|---|---|---|
| Down payment | $80,000 | $40,000 |
| CMHC premium (into the loan) | — | $11,160 |
| Mortgage | $320,000 | $371,160 |
| Welcome tax | $4,154 | $4,154 |
| Notary + inspection | $2,300 | $2,300 |
| QST on the premium | — | $1,004 |
| Cash needed at closing | $86,454 | $47,458 |
| Mortgage payment | $1,771/mo | $2,054/mo |
| Carrying costs | $690/mo | $690/mo |
| All-in monthly | $2,461 | $2,744 |
| Interest over the full term | $211,334 | $245,121 |
The 10% option needs $39,000 less on closing day and costs $283 more every month — plus $33,787 more in interest over the life of the loan. Neither is the right answer. Which one is right depends on whether the $39,000 is the constraint, and that is a question only you can answer.
The one lever that pays you back
Switch that same $320,000 mortgage from monthly to accelerated bi-weekly and the payment becomes $886 every two weeks. That is 26 payments a year instead of 12 monthly ones — the equivalent of 13 monthly payments. The extra one goes entirely to principal.
It cuts 3.3 years off the amortization and saves $32,050 in interest. You do not renegotiate anything, and most lenders will set it up on request.
It is the highest-return decision in the whole transaction, and it is a checkbox.
Run your own numbers
Every figure above comes from Atlas’s mortgage calculator — semi-annual compounding, the CMHC premium bands and their sales tax, the real welcome-tax brackets for Quebec and Montreal, and accelerated payment schedules. It is free, it needs no account, and you can compare several properties side by side.
The regulatory tables it uses are stamped with the year they were sourced, and every derived figure can be overridden by hand — because the one thing worse than no number is a confidently wrong one.
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