Canadian mortgage payment calculator

The calculator above runs on Canadian rules. That matters more than people realize. The same headline rate that gives an American homeowner a tidy round payment gives a Canadian one a slightly different number, because of a 145-year-old federal law that almost nobody thinks about, plus four other quirks worth understanding before you sign anything.

Here's the plain-English version of how a Canadian mortgage actually works, why it matters when you're house-hunting or staring down a renewal letter, and what to watch for in 2026.

Your Canadian mortgage isn't an American mortgage

This is the thing nobody tells first-time buyers. The federal Interest Act, on the books since 1880, says (in section 6) that interest on a mortgage in Canada must be calculated "yearly or half-yearly, not in advance." For fixed-rate mortgages, lenders use the half-yearly option. For variable-rate mortgages, they typically compound monthly per the contract.

What does that mean practically? When your lender quotes 5.00%, that's the nominal annual rate. To turn it into a payment, they compound it twice a year. The actual cost over a year, the effective annual rate, works out to 5.0625%: slightly above the headline 5%, but lower than the 5.116% you'd see in the United States, where mortgages compound monthly.

Borrow $500,000 at 5.00% over 25 years. In the United States, the monthly payment is $2,923. In Canada, it's $2,908. Same rate, same amortization, same property: a $15-a-month difference that compounds to roughly $4,400 over the life of a 25-year loan. Small per month, real over a lifetime.

It's also why every mortgage calculator that doesn't explicitly say "Canadian" is probably wrong by a few dollars per month. CalcNorth's math is verified against the Financial Consumer Agency of Canada's reference calculator, to the cent.

How payment frequency really works

Pick "accelerated bi-weekly" on the calculator and watch what happens to the payoff timeline. You'll save roughly 3 to 5 years off a typical mortgage. It feels like a trick. It kind of is.

Here's the trick: a "monthly" payment is one payment, twelve times a year. "Bi-weekly" is one payment every 14 days, which works out to 26 payments a year. The math is recalibrated so each payment is roughly half a monthly payment: same total per year, same payoff timeline, just smoother cash flow.

Accelerated bi-weekly is the same number of payments (26), but each one is exactly half the monthly payment. Multiply: 26 × (monthly ÷ 2) = 13 monthly payments per year. You're paying one extra month, every year, without it really feeling like extra. That extra principal compounds out interest savings, so a 25-year mortgage on accelerated bi-weekly typically pays off in about 22 years instead of 25.

Weekly works the same way. Standard weekly is 52 payments calibrated to equal monthly; accelerated weekly is 52 × (monthly ÷ 4), giving you 13 monthly equivalents per year.

The catch: it only works if your cash flow can absorb it. Bi-weekly pay periods mean two months a year you'll make three payments instead of two: the months with three pay-period Fridays. Plan for them.

The CMHC premium math, in English

If you put down less than 20%, you legally have to insure your mortgage. Three companies provide that insurance: CMHC (the federal Crown corporation), Sagen, and Canada Guaranty. They charge nearly identical rates, and the rates step up with how leveraged you are.

The tier ladder, as a percentage of your loan amount: 0.60% up to 65% LTV, 1.70% to 75%, 2.40% to 80%, 2.80% to 85%, 3.10% to 90%, and 4.00% to 95% (or 4.50% if your down payment is borrowed). Add 0.20% if your amortization is longer than 25 years.

Worked example: $500,000 home, 5% down ($25,000). Your loan is $475,000 at 95% LTV, putting you in the top tier (4.00%). Premium = $19,000. That gets rolled into your mortgage and amortized over the full term. You don't pay it upfront.

Here's the trap. If you live in Ontario, Quebec, or Saskatchewan, there's PST on the premium. It cannot be financed. It's payable in cash on closing day, on top of your down payment. On that $19,000 Ontario premium, that's $1,520 in extra cash you need to bring to your lawyer. Quebec at 9% would be $1,710; Saskatchewan at 6%, $1,140. (Manitoba historically taxed the premium at 7% but dropped the tax in 2020 and has not reinstated it.) CalcNorth surfaces this as its own line in the "Cash to close" panel so it doesn't surprise you the week before closing.

The 30-year option: as of December 15, 2024, first-time home buyers and buyers of newly-built homes can extend their insured amortization to 30 years (under reforms the federal government called "the boldest mortgage reforms in decades"). The trade-off is the 0.20% surcharge and meaningfully more total interest, because five extra years of compounding adds up. Toggle the option in the calculator to compare both scenarios head-to-head.

The stress test, demystified

Here's the surprise: even if you can afford a mortgage at today's rate, your bank won't approve you unless you can also afford it at a much higher rate.

OSFI (the federal banking regulator) requires lenders to qualify you at a Minimum Qualifying Rate. The formula is the greater of your contract rate plus 2 percentage points, or 5.25%. So if your lender offers you 4.49%, you're stress-tested at 6.49%. If they offer 3.00%, the 5.25% floor kicks in. If they offer 7.00%, you're stress-tested at 9.00%.

Why does this exist? When the Bank of Canada policy rate was near zero in 2020 and 2021, plenty of borrowers locked in 1.86% mortgages. By 2026, those mortgages are renewing at 4.50% or higher. The stress test is supposed to ensure that when rates inevitably move (and they always do), you can still afford your house.

It applies to insured and uninsured mortgages, has been in place since 2018, and OSFI confirmed for 2026 that it remains the qualification standard. The calculator shows you the stress-test payment inline, so you can see exactly the number your lender is testing against.

What renewal at a higher rate really costs

If you have a five-year fixed mortgage that started in 2020 or 2021 at 1.5% to 2.0%, and you're renewing in 2025 or 2026, your payment is going up. By a lot.

A Bank of Canada staff analysis from July 2025 estimated that about 60% of mortgage holders renewing in 2025 and 2026 will see a payment increase, with the average payment shock at the height of the renewal cycle running roughly $400 a month. Five-year fixed mortgages, which make up about 40% of all Canadian mortgages, face an average payment increase of around 20% on 2026 renewals.

A worked renewal: $500,000 mortgage at 1.86% fixed, 25-year amortization, originated April 2021. After five years you've paid the balance down to roughly $430,000. You're renewing in April 2026 at, say, 4.49% over the remaining 20-year term. Your monthly payment goes from $2,082 to $2,711. That's $629 more a month, every month, for the next five years. $7,548 a year. The calculator's renewal panel runs this scenario interactively as you change the inputs.

The Globe and Mail profiled renewing households in April 2026. Bonnie Clancy in London, Ontario, who renewed from 1.86% to 3.79%, told the paper: "I wouldn't say I stopped living, I just made some lifestyle swaps." Michael Toope in Ottawa went from $500 bi-weekly to $950 bi-weekly at 4.25%, calling the squeeze "hopefully a temporary situation." For most households, the squeeze is what the renewal feels like: not a crisis, but a recalibration.

The trigger-rate trap, for variable-rate borrowers

If you have a variable-rate mortgage with fixed payments (the most common kind at TD, BMO, and CIBC), there's a quiet danger most borrowers don't think about. Your payment doesn't change when rates rise. But the share of each payment that goes to interest does. At a high enough rate, your payment no longer covers the interest, and your balance starts going up instead of down.

That threshold is the trigger rate. By the end of October 2022, after the Bank of Canada's aggressive hike cycle, the BoC estimated about 50% of variable-rate mortgages with fixed payments had hit their trigger rate, and another 15% were on track to do so by mid-2023. CIBC alone reported $49.8 billion in negative-amortization balances by the fourth quarter of 2023.

The escape hatches: switch to a fixed payment that adjusts with rates (RBC and Scotiabank don't offer fixed-payment variables, so this isn't an issue at those banks); voluntarily increase your monthly payment; or convert to a fixed-rate term. The calculator's renewal panel will show you what a higher-rate scenario costs, and the OSFI stress-test panel will show the qualifying rate you'd be tested against if you switched lenders.

Frequently asked questions

What's the actual difference between a Canadian mortgage and an American one?

Two big things: how interest compounds, and how the term works. Canadian fixed mortgages compound semi-annually by federal law (the Interest Act); American mortgages compound monthly. That makes Canadian payments slightly lower at the same headline rate. Also, Canadian terms are usually 1 to 5 years (you renew with a new rate at the end), while American mortgages typically lock the rate for the full 30 years. So Canadians face renewal risk that Americans don't, and the conversation "my rate goes up next year" is a Canadian conversation.

Do I have to make accelerated payments?

No. Standard monthly is the default and is fine. Accelerated bi-weekly or weekly is a built-in way to pay down your principal faster without it feeling like extra effort: you make 13 months of payments per year instead of 12, by paying half (or a quarter) of the monthly amount on a more frequent schedule. If your cash flow is tight, stick with monthly. If it's comfortable, accelerated typically saves 3 to 5 years and tens of thousands in interest over a 25-year amortization.

Why is the CMHC premium taxed in some provinces but not others?

Ontario (8%), Quebec (9% on insurance premiums), and Saskatchewan (6%) classify the CMHC premium as an insurance product subject to provincial sales tax. Manitoba previously charged 7% but suspended the tax in 2020. The other provinces don't tax it. There's no federal harmonization on this. The tax must be paid in cash at closing because regulators don't allow taxes-on-insurance-premiums to be financed into the principal of the loan they're insuring. Surfacing this hidden cost is one of the things CalcNorth does that most other calculators skip.

What's the difference between fixed and variable rates in Canada?

Fixed rates are locked for the full term (1 to 5 years typically). You know exactly what you pay each month until renewal. Variable rates float with your lender's prime rate, which moves with the Bank of Canada's policy rate. Variables often have a lower headline rate but expose you to monthly payment changes, or, if you have a fixed-payment variable, to trigger-rate risk. Canadian fixed mortgages compound semi-annually by statute; variable mortgages typically compound monthly per contract.

How is the qualifying rate different from my contract rate?

Your contract rate is what you actually pay each month. Your qualifying rate is what the bank uses to test whether you can afford the mortgage if rates rise. Per OSFI, that's the greater of your contract rate plus 2 percentage points, or 5.25%. The bank uses the qualifying rate when calculating your debt-service ratios (GDS and TDS). You only ever pay the contract rate, but you have to pass the qualifying-rate test to be approved.

Can I extend my amortization to 30 years?

Conditionally. Since December 15, 2024, first-time home buyers and buyers of newly-built homes can use a 30-year insured amortization. Other insured buyers cap at 25 years. Uninsured (20% or more down) mortgages can use up to 30 years regardless of buyer status. The 30-year option lowers your monthly payment but adds a 0.20% surcharge to your CMHC premium and meaningfully increases the total interest you'll pay. The calculator lets you toggle this on and off to see the trade-off in dollar terms.

What actually happens at renewal?

Your term ends, and you negotiate a new rate (often different from the old one) over the remaining amortization. Your lender will send you a renewal offer 30 to 120 days before maturity. You can accept it, negotiate down, or shop the offer at another lender. One important wrinkle: switching lenders requires you to requalify (meaning you'll be re-stress-tested at today's rates). Renewing in place with your existing lender skips that requalification, which is why staying put is sometimes worth a slightly higher rate than switching.

Where do CalcNorth's numbers come from?

Math: the Financial Consumer Agency of Canada's reference mortgage calculator, matched to the cent across 51 unit tests. Premium tiers: CMHC's published rates. Stress-test rule: OSFI's Minimum Qualifying Rate, current as of 2026. Bank of Canada rates in the sidebar (overnight rate, prime, 5-year GoC bond yield) come live from the Bank of Canada's Valet API, refreshed every 24 hours. We don't make up numbers and we don't massage them.