This Ottawa mortgage calculator estimates the payment on a home here — and it builds in the part most calculators skip: the CMHC insurance premium that applies when your down payment is under 20%. That means the number you see is much closer to what you’ll actually pay.
Enter a price, your down payment, and a rate to see your payment, then read on to understand down payment rules, insurance, amortization, and the costs a mortgage payment leaves out.
Ottawa Mortgage Calculator
Estimate your mortgage payment on an Ottawa home, including the CMHC insurance premium when your down payment is under 20%.
$
$
20.0% of the home price
%
$
Mortgage payment (monthly)
$3,024
Estimate only. Uses the Canadian convention of interest compounded semi-annually. Your actual rate, premium, and payment are set by your lender and insurer. Verify figures before relying on them.
How to read your mortgage payment
Your mortgage payment is built from four things: how much you borrow, your interest rate, your amortization (the number of years to pay it off), and how often you pay. Change any one and the payment moves. The calculator uses the Canadian convention of interest compounded semi-annually, which is how fixed-rate mortgages are actually quoted here, so the figure lines up with what a lender would show you.
The amount you borrow isn’t simply the price minus your down payment. If you put down less than 20%, mortgage default insurance is added to your loan, which nudges the payment up. The calculator folds that in automatically — the sections below explain when and why.
How much down payment do you need in Ottawa?
The minimum down payment in Canada is set by the purchase price. You need 5% on the first $500,000, then 10% on any portion between $500,000 and $1.5 million. At $1.5 million and above, you need at least 20% down, because mortgage insurance isn’t available on those homes.
| Home price | Minimum down payment |
|---|---|
| $500,000 | $25,000 (5%) |
| $650,000 | $40,000 |
| $800,000 | $55,000 |
| $1,000,000 | $75,000 |
| $1,500,000 | $300,000 (20%) |
The insured cap rose to $1.5 million at the end of 2024, which was a meaningful change for Ottawa’s move-up market — buyers in the $1 million to $1.5 million range can now purchase with less than 20% down for the first time. The Government of Canada’s mortgage changes set out the details.
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When you pay CMHC mortgage insurance — and what it costs
If your down payment is under 20%, you pay for mortgage default insurance (through CMHC, Sagen, or Canada Guaranty). It protects the lender, not you, and the premium is a percentage of your mortgage based on how much you put down. The premium is added to your mortgage and paid off over time, so it doesn’t come out of your pocket at closing — with one Ontario exception noted below.
| Down payment | Premium (% of mortgage) |
|---|---|
| 5% to 9.99% | 4.00% |
| 10% to 14.99% | 3.10% |
| 15% to 19.99% | 2.80% |
| 20% or more | No premium |
A 30-year amortization adds a 0.20% surcharge to the premium. The exact rates are on CMHC’s premium page.
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Fixed vs. variable and the mortgage stress test
A fixed rate stays the same for your whole term, so your payment is predictable. A variable rate moves with your lender’s prime rate, which tracks the Bank of Canada’s policy rate — lower when rates fall, higher when they rise. Neither is automatically better; it depends on your tolerance for payment changes and where rates are heading.
Either way, you’ll have to pass the mortgage stress test to qualify. Lenders must approve you at the higher of 5.25% or your contract rate plus two percentage points — so your real qualifying bar is usually well above the rate you’ll actually pay. It’s a good idea to understand how the mortgage stress test works in Ontario before you shop, and to weigh fixed versus variable for your situation. The federal regulator, OSFI, publishes the underwriting rule behind it.
25- or 30-year amortization: which should you pick?
A longer amortization lowers your payment but costs more interest over the life of the loan. Since the end of 2024, a 30-year insured amortization is available to first-time buyers on any eligible home, and to any buyer purchasing a newly built home. If you don’t fit either case and you’re putting less than 20% down, 25 years is the maximum. With 20% or more down, most lenders allow up to 30 years regardless.
The trade-off is real: a 30-year term frees up monthly cash flow, which can be the difference in a tight budget, but you’ll pay noticeably more interest. Run both in the calculator and compare the payment against the total you’d repay before you decide.
How accelerated bi-weekly payments save you money
Switching from monthly to accelerated bi-weekly is the simplest way to pay less interest without refinancing. An accelerated bi-weekly payment is just your monthly payment split in half and paid every two weeks. Because there are 26 bi-weekly periods in a year, you end up making the equivalent of one extra monthly payment annually — which shaves years off your amortization and thousands off your interest. Toggle the frequency in the calculator to see the effect on your own numbers.
What a mortgage payment leaves out
Your mortgage payment is only part of the cost of owning. Budget separately for property taxes, home insurance, utilities, and — in a condo or freehold with fees — monthly condo or association fees. On closing day itself, you’ll also face one-time costs the mortgage doesn’t cover: legal fees, title insurance, and the biggest one, land transfer tax. Estimate that with the Ottawa land transfer tax calculator, and see the full picture in the guide to what it costs to buy a house in Ottawa.
Jason Polonski, REALTOR® — Right at Home Realty
An Ottawa REALTOR® with 15+ years’ experience and a background in the construction and electrical trades, Jason helps buyers across Kanata, Stittsville, Barrhaven, and the west end line up financing and budget a purchase with no surprises at closing. Named Best in Ottawa Top REALTOR® seven years running.
Mortgage Calculator Ottawa (FAQs)
interest compounded semi-annually and includes the CMHC insurance premium when your down payment is under 20%, so it’s close to a lender’s own quote. Your exact payment depends on the rate you’re approved for and your insurer, which a lender confirms at application.
5% on the first $500,000 of the price, plus 10% on any portion above $500,000, up to $1.5 million. At $1.5 million or more, you need 20% down. On a $650,000 Ottawa home, the minimum is $40,000.
No. Mortgage default insurance is only required when your down payment is under 20%. At 20% or more, you have a conventional mortgage with no premium.
Yes, in more cases than before. Since late 2024, a 30-year insured amortization is available to first-time buyers on any eligible home and to any buyer of a newly built home. With 20% or more down, most lenders allow up to 30 years regardless.
You can add annual property tax to see an all-in monthly figure. One-time closing costs like land transfer tax and legal fees are separate — estimate land transfer tax with the Ottawa land transfer tax calculator.
Usually, yes. It splits your monthly payment in half every two weeks, which adds up to one extra monthly payment a year and can cut years off your amortization — without refinancing or a higher rate.
