CMHC Mortgage Insurance 2026: Premium Calculator + When It Actually Makes Sense

In Canada, mortgage default insurance isn’t a product you opt into – it’s a legal requirement when your down payment falls below 20% of the purchase price. CMHC is the most recognized provider, though Sagen and Canada Guaranty also operate in this space, and the premium you end up paying shifts meaningfully depending on how much you put down. What follows is a straightforward breakdown of how CMHC mortgage insurance works heading into 2026, what the premiums actually cost at each down payment threshold, and an honest look at whether holding off to save a larger down payment makes financial sense for most buyers.

What CMHC Mortgage Insurance Actually Is

CMHC mortgage insurance — formally called mortgage default insurance — protects the lender, not you. If you stop making payments and the lender has to sell the home at a loss, CMHC covers that shortfall. You pay the premium, the bank gets the protection. That arrangement is what allows Canadian lenders to offer mortgages with as little as 5% down without absorbing catastrophic risk.

The insurance is mandatory on any residential purchase in Canada where the down payment is less than 20% of the purchase price. It applies to homes purchased for up to $1.5 million (as of the December 2024 rule change — up from $1 million). Properties above $1.5 million still require a minimum 20% down payment and are not insurable.

The premium is calculated as a percentage of your mortgage amount (not the purchase price) and is typically added directly to your mortgage balance. You don’t usually write a cheque for it at closing — it gets folded in and you pay interest on it over the life of the mortgage. Some provinces also charge PST on the premium itself, which is due at closing. Ontario, Manitoba, and Quebec apply provincial tax to CMHC premiums.

CMHC Premium Rates for 2026

The premium rate is tiered by your loan-to-value (LTV) ratio — the size of your mortgage relative to the home’s value. A smaller down payment means a higher LTV and a higher premium rate.

These rates have been stable for several years and remain current for 2026. The most significant jump is between 10% and 5% down — that 0.90 percentage point difference adds up quickly on a large mortgage.

A Real-Dollar Example

Let’s say you’re buying a $650,000 home in Ottawa with 5% down ($32,500). Your insured mortgage is $617,500. At a 4.00% premium rate, you’re adding $24,700 to your mortgage balance. At a typical 5-year fixed rate of around 4.5% amortized over 25 years, that extra $24,700 costs you roughly $13,500 in additional interest over the full amortization. Your total insurance cost: approximately $38,200 in real money.

Now compare that to putting 10% down ($65,000). Your mortgage is $585,000, premium rate drops to 3.10%, and the premium is $18,135 — a savings of about $6,500 in premium alone, before accounting for interest differences.

How to Calculate Your Own Premium

The formula is straightforward:

1. Subtract your down payment from the purchase price to get your mortgage amount.
2. Identify your LTV tier from the table above.
3. Multiply the mortgage amount by the premium rate.
4. Add that premium to your mortgage balance (unless you pay it separately, which almost no one does).

Example for a $500,000 home with 8% down ($40,000):

• Mortgage amount: $460,000
• LTV: 92% → premium rate: 4.00%
• Premium: $460,000 × 0.04 = $18,400
• New mortgage balance: $478,400

You can also use the CMHC premium calculator on our home tools page to run different scenarios side by side.

When 5% Down + CMHC Actually Makes Sense

Here’s the question most first-time buyers are actually wrestling with: is it better to buy now with 5% down and absorb the CMHC premium, or wait longer and save a bigger down payment to avoid it?

The honest answer depends on three things: how fast prices are rising in your market, what you’d do with the money while renting, and how long it would realistically take you to save the difference.

When Getting In Sooner Wins

In markets where home prices are appreciating faster than you can save — historically common in Toronto, Vancouver, and some secondary Ontario and BC cities — buying earlier with CMHC insurance can make financial sense even with the premium cost. If a home appreciates $40,000 in the year it takes you to save an extra $30,000 in down payment, you’ve lost ground.

There’s also a rent offset to consider. Every month you’re renting instead of owning, you’re paying someone else’s mortgage. If your monthly rent is $2,200 and you’d wait 18 months to hit 10% down, that’s $39,600 in rent you don’t get back. Run the rent-vs-buy comparison with your actual local numbers before assuming waiting is the conservative choice.

When Waiting and Saving More Makes Sense

If you’re in a slower or flat market, or if you’re already close to the 10% down threshold (which drops the premium rate from 4.00% to 3.10%), the math often favours waiting. The same is true if reaching 20% down is realistic within 12–18 months — eliminating the insurance premium entirely saves tens of thousands over a 25-year amortization.

Also worth noting: the stress test rate in Canada currently sits at either 5.25% or your contract rate plus 2%, whichever is higher. A smaller mortgage from a bigger down payment improves your stress test math and may qualify you for better rate options through mortgage brokers.

The Other Two Providers: Sagen and Canada Guaranty

CMHC isn’t the only insurer in Canada. Two private alternatives — Sagen (formerly Genworth Canada) and Canada Guaranty — offer competing mortgage default insurance products.

In practice, the lender usually decides which insurer to use — not you. But if you’re working with a mortgage broker and have a non-standard application (variable income, recent employment change, self-employed), it’s worth asking whether Sagen or Canada Guaranty might offer a better path to approval. Premium rates across all three are broadly similar, so the difference usually comes down to underwriting flexibility rather than cost.

Other Costs and Rules to Know

A few things that often catch buyers off guard:

• Amortization limit: Insured mortgages for first-time buyers or new builds now qualify for a 30-year amortization (as of August 2024 policy change). All other insured mortgages remain at 25 years maximum.
• Second homes not eligible: Mortgage default insurance only applies to owner-occupied principal residences. You cannot use CMHC insurance for rental or investment properties.
• The premium doesn’t disappear early: If you sell or refinance before your mortgage matures, there’s no refund of the CMHC premium you’ve already paid.
• Provincial PST: Ontario residents pay 8% PST on the premium amount at closing — on a $20,000 premium, that’s $1,600 due at the time of purchase, not rolled into the mortgage.
• First Home Savings Account (FHSA): If you’re still saving, the FHSA lets you contribute up to $8,000 per year (lifetime max $40,000) with a tax deduction on the way in and tax-free growth. More on FHSA strategy here.

Honest Takeaway: When CMHC Insurance Is the Right Move (and When It Isn’t)

CMHC insurance makes sense when:

• You’re buying in an appreciating market and the cost of waiting outweighs the premium.
• You have stable income, a solid emergency fund, and the monthly payment is genuinely comfortable — not stretched.
• You’re a first-time buyer who qualifies for the 30-year amortization option, which meaningfully reduces monthly payments.
• You’ve already used or plan to use the Home Buyers’ Plan (RRSP) and FHSA to maximize your down payment and the gap to 20% is still large.

CMHC insurance is probably not the right move when:

• You could realistically hit 20% down within 12–18 months — the premium savings are substantial and worth a short wait in a flat market.
• You’re already near the 10% threshold with a little more discipline — dropping from 4.00% to 3.10% saves real money for a relatively small additional savings effort.
• Your monthly payment at 5% down is already at the edge of what your budget can handle — adding $20,000+ to your mortgage balance only makes that tighter over time.
• You’re buying in a market with flat or declining price trends, where the urgency to get in sooner doesn’t apply the same way.

Mortgage default insurance is a tool, not a trap. For a lot of Canadian families, it’s the practical bridge between renting indefinitely and building equity in a home. The key is going in with clear numbers — knowing exactly what you’re paying and why — rather than treating it as a fee you simply have to accept without understanding it.

NorthMarkets provides educational content for Canadian families. This is not personalized financial advice. Consult a licensed mortgage professional or financial advisor before making mortgage or real estate decisions.

— Auburn AI editorial, Calgary AB