What CMHC Insurance Actually Costs You in 2025

You've saved your down payment, found the house, and then your mortgage broker mentions a fee you didn't budget for: default insurance. If your down payment is under 20%, federal rules make this insurance mandatory, and most buyers first hear about it at the kitchen-table stage of the deal, when there's no time left to shop the cost.

Here's the part that surprises people: the insurance protects your lender, not you. If you default and the home sells for less than the balance owed, the insurer covers the lender's shortfall. That's the whole product. The silver lining is that insured mortgages often carry lower interest rates than uninsured ones, because the lender's risk drops significantly when a policy backs the loan, according to the Canada Mortgage and Housing Corporation.

So what does it cost? Premiums run from 0.6% to 4.5% of the total mortgage amount, with the rate set by your down payment size. The smaller your down payment, the higher the premium. Using the published CMHC premium tiers, the standard rates for 2025 break down like this:

• 5% to 9.99% down: 4.00% of the mortgage amount
• 10% to 14.99% down: 3.10% of the mortgage amount
• 15% to 19.99% down: 2.80% of the mortgage amount
• 20% to 24.99% down: 2.40%, and only if you choose optional coverage

In practice, most buyers with under 20% down land in the 2.80% to 4.00% range. On a $400,000 home with 5% down, that's a $15,200 premium added to a $380,000 mortgage, per the Financial Consumer Agency of Canada. Bump the down payment to 10% and the premium drops to $11,160. Save the full 20% and you pay nothing.

One more wrinkle: you don't pick your insurer. Three companies write this coverage in Canada: CMHC, which is a Crown corporation, plus two private insurers, Sagen (formerly Genworth Canada) and Canada Guaranty. Your lender decides which one covers your file. The good news is the choice matters less than you'd think on price. All three price premiums on the same two drivers, your loan-to-value ratio and amortization length, and their published tables sit in a similar range. Where the insurer choice really matters is on unusual files, like self-employed income or rental properties.

The takeaway for your budget: the premium is your money even though the insurer is the lender's choice, and it belongs in your numbers from day one. A CMHC mortgage calculator Canada search will get you estimates, but you can run your own scenario in under a minute with the Realtix calculator, which applies the formula (purchase price minus down payment) times the premium rate automatically. If you're weighing whether to stretch your savings another few months to cross a premium tier, that one calculation is worth doing before you sign anything.

The 2025 CMHC Premium Tiers and Down Payment Rules

The premium you pay hinges on two numbers: how big your down payment is, and how much house you're buying. Get these rules straight before you run any numbers, and the rest of your budget falls into place.

For 2025, the standard CMHC premium tiers work on a simple principle: the smaller your down payment, the bigger the premium. According to PolicyAdvisor's premium table, the rates break down as follows:

• 5% to 9.99% down: 4.00% premium
• 10% to 14.99% down: 3.10% premium
• 15% to 19.99% down: 2.80% premium

A 20% down payment means no insurance is required at all. Note that these tier percentages come from a commercial source rather than CMHC's official published table, so it's worth confirming your exact rate with CMHC's live calculator before you commit. The broader official range runs from 0.6% to 4.5% of the mortgage amount, as documented by both CMHC and the Financial Consumer Agency of Canada.

Down payment minimums follow a tiered structure by price. For homes up to $500,000, you need 5% down. Above $500,000, the rule splits: 5% on the first $500,000 plus 10% on the portion above it. A $600,000 home, for example, requires $25,000 plus $10,000, or $35,000 total.

Then there's the ceiling. Homes priced at $1.5 million or more are not eligible for CMHC insurance at all, and buyers in that range need a minimum 20% down payment. One caution here: the FCAC's own down payment page still states insurance is unavailable for purchases of $1 million or more, an older figure that predates the current threshold. CMHC's 2025 publication is the authoritative source on the $1.5 million cap.

If you're stretching for that first tier, remember the premium compounds the stretch. CMHC's own worked example shows a $750,000 home with 8% down producing a $690,000 mortgage and a $27,600 premium at the 4% rate. That's real money added to your balance before you've paid a cent of interest.

The fastest way to see your own number is to plug your purchase price and down payment into a calculator that applies these tiers automatically. The Realtix CMHC mortgage calculator does exactly that, estimating your premium and total monthly payment in under a minute so you can compare scenarios side by side before you write an offer.

Worked Examples: Real Numbers on a $400,000 Home

A $400,000 home sounds like a fixed price. It isn't. What you actually pay depends almost entirely on how much you put down, and the Financial Consumer Agency of Canada has published a comparison that makes the math painfully clear.

The FCAC's official example assumes a $400,000 purchase, a 4% interest rate, and a 25-year amortization, with the insurance premium added to the mortgage. Here's how the three down payment scenarios shake out:

• 5% down ($20,000): $380,000 mortgage, a $15,200 premium, and a total cost of home of $643,649.
• 10% down ($40,000): $360,000 mortgage, an $11,160 premium, and a total cost of $625,712.
• 20% down ($80,000): $320,000 mortgage, no premium required, and a total cost of $584,979.

Read the gap carefully. Going from 5% down to 20% down saves you $58,670 over the life of the mortgage, and only $60,000 of that difference is your own cash. The rest is the premium and the interest it drags along.

The premium itself follows a simple formula: (purchase price minus down payment) times the premium rate. At 5% down you land in the 4.00% tier, so $380,000 × 4.00% = $15,200. At 10% down the rate drops to 3.10% on a smaller balance, which is how $360,000 × 3.10% produces $11,160. These tier rates come from PolicyAdvisor's published table, so confirm against CMHC's live calculator before you commit.

Here's the part most buyers miss. When the premium gets rolled into the mortgage, you pay interest on it for the full 25 years. As one industry analysis puts it, financing the premium "can multiply its true cost several times over." That $15,200 premium on the 5% down scenario doesn't cost $15,200. It costs that plus decades of compounded interest, which is exactly why the total cost of home climbs to $643,649.

A financed premium also affects qualification. The larger balance raises your monthly payment, which feeds into your GDS and TDS ratios and the stress test you have to clear.

You can run these numbers by hand, or plug your own purchase price and down payment into the Realtix CMHC mortgage calculator and get your premium and total monthly payment in under a minute. Either way, the lesson from the FCAC's table is the same: every extra dollar of down payment works twice, shrinking both the premium and the interest that rides on it.

The 30-Year Amortization Surcharge and Provincial Tax on Premiums

The sticker price of your CMHC premium is only part of the story. Two costs that catch buyers off guard are the surcharge for stretching your amortization to 30 years and the provincial sales tax you must pay in cash on closing day, even when the premium itself gets rolled into your mortgage.

The 30-year amortization surcharge

Since August 1, 2024, first-time buyers purchasing newly built homes can qualify for a 30-year insured amortization. The catch: CMHC adds a 0.20% premium surcharge to the standard rate. On a $400,000 purchase with 10% down, that pushes your premium tier from 3.10% to 3.30%, or roughly $720 more on a $360,000 mortgage. The 25-year limit still applies to every other type of insured mortgage.

Is the surcharge worth it? The math says most of the benefit shows up now, not later. An RBC analysis found that on a $150,000 mortgage, moving from 25 to 30 years lowers monthly payments by just over $75, but adds more than $20,000 in total interest. You're trading about $2,700 in near-term relief for five extra years of interest costs, plus the higher premium.

That trade-off isn't automatically bad. RateHub's Penelope Graham noted in CBC coverage that "the main payoff with extending your amortization is that you have smaller monthly payments in the short term," an important trade-off for stretched buyers to understand. Broker Ron Butler was blunter, arguing the policy is "almost completely impractical in most of Ontario, most of British Columbia, and certainly Montreal," though it could help buyers on the Prairies and in Atlantic Canada. CMHC's own 2024 Mortgage Consumer Survey found 29% of buyers already chose amortizations of 25 years or more, so demand for lower payments is real.

Provincial tax on your premium: the cash-at-closing surprise

Here's the detail that derails closing budgets. Provincial sales tax on mortgage default insurance cannot be added to your mortgage. It must be paid upfront in cash, on top of your down payment and closing costs. The Financial Consumer Agency of Canada confirms this for Ontario, Manitoba, and Quebec.

The provincial picture, based on data from PolicyAdvisor's CMHC insurance premium calculator:

• Ontario: 8% (the provincial portion of HST), payable in cash at closing
• Quebec and Saskatchewan: provincial tax applies, also due upfront
• Alberta and British Columbia: 0%, with BC exempting insurance premiums from its 7% PST
• Manitoba: PolicyAdvisor lists 0%, noting the province permanently eliminated its 7% RST, though the FCAC page still lists Manitoba among taxing provinces

That Manitoba discrepancy is worth a phone call to your mortgage professional before closing day, because the two official-adjacent sources disagree. On an Ontario purchase with a $15,200 premium, the 8% tax means writing a cheque for another $1,216 in cash. Budget for it from the start, and if you want to see the premium and tax impact on your specific numbers, the Realtix CMHC mortgage calculator estimates your premium and total monthly payment in under a minute.

Run Your Own Numbers in Under a Minute

By this point you've seen how the math works. The faster path is to skip the spreadsheet and let a calculator handle the four variables that actually move the number: purchase price, down payment, amortization length, and province.

Here's a short checklist to run before you plug anything in:

• Confirm your down payment tier. The premium rate jumps between 5–9.99%, 10–14.99%, 15–19.99%, and 20–24.99% down, so a small change in your down payment can shift your rate by more than a full percentage point.
• Check whether you're in a PST province. Buyers in Ontario, Quebec, and Saskatchewan pay provincial sales tax on the premium itself, and that tax has to come out of pocket at closing.
• Decide 25 vs 30 years. A 30-year amortization adds a 0.20% surcharge to your premium and only applies if you're a first-time buyer purchasing a newly built home.
• Budget the tax separately. Provincial sales tax on the premium cannot be added to your mortgage, so it needs its own line in your closing-cost estimate.

The formula itself is straightforward: (Purchase Price − Down Payment) × Premium Rate = Total Premium. But the rate depends on which tier you land in, the amortization adds a surcharge on top, and the provincial tax layers on after that. Three moving parts, and getting any one wrong throws off your closing-day cash number.

The Realtix CMHC mortgage calculator runs all four inputs at once and gives you a personalized premium and total monthly payment in under a minute. It's the same math shown earlier in this guide, just without the manual work.

For real estate agents publishing this kind of local buyer education at scale, the bottleneck isn't the math. It's producing neighbourhood-specific guides like this one consistently, keeping them current when CMHC updates its rules, and making sure they actually reach buyers searching in your market. That's the work Realtix takes off an agent's plate: a personal-brand website with city and neighbourhood content built in, an AI voice agent and FAQ chat that answer buyer questions around the clock, and a content engine that publishes this kind of calculator-driven guide on a schedule. The agent shows houses; the system runs the presence.

Run your numbers, then run them again after a small change to your down payment. The difference is usually larger than most buyers expect.