CMHC Mortgage Insurance: What It Is, Who Pays, And Why It’s Not What You Think

Almost every first-time buyer in Canada will encounter CMHC insurance — and almost every first-time buyer misunderstands what it actually does. Quick myth-buster: it doesn’t protect you. It protects your lender. And you pay the premium.

What CMHC insurance actually is

Canada Mortgage and Housing Corporation (CMHC), Sagen, and Canada Guaranty are the three mortgage default insurers in Canada. When a borrower puts less than 20% down, the federal regulator requires the lender to obtain insurance against borrower default. The insurer pays the lender if the borrower defaults and the lender can’t recover the full amount through foreclosure.

The insurer charges a one-time premium for taking on this risk, and the premium is added to your mortgage balance — you don’t pay it upfront, but you pay interest on it for the life of the loan.

The premium tiers (2026)

Premium rates depend on loan-to-value (LTV) ratio:

• 5–9.99% down (LTV 90.01–95%): 4.00% premium
• 10–14.99% down (LTV 85.01–90%): 3.10% premium
• 15–19.99% down (LTV 80.01–85%): 2.80% premium
• 20%+ down: no insurance required (uninsured mortgage)

For 30-year amortizations on insured mortgages, add +0.20% to the premium.

Real-world example

On a $700,000 home with 5% down ($35,000), the mortgage is $665,000. CMHC premium at 4.00% = $26,600. Your insured mortgage becomes $691,600. You’ll pay roughly $1,700 in additional interest on that premium each year of the mortgage at current rates.

Same home with 20% down ($140,000): no premium, $560,000 mortgage, no extra interest. You spent $105K more upfront but saved $26,600 in premium plus the lifetime interest on it.

The break-even logic most people miss

Putting 20% down to avoid CMHC sounds smart but isn’t always the right call. The math depends on what you’d do with the extra $105,000 cash if you didn’t use it for down payment:

• Buying sooner: in a rising market, getting in 12-24 months earlier with 5% down can outperform waiting to save 20%
• Investment alternative: $105K invested at 7% over 25 years grows to ~$570K. The CMHC premium plus interest costs maybe ~$50K over the same period. The math favours putting less down if you actually invest the difference.
• Keeping reserves for renos/emergencies: a buyer with 5% down and $30K in reserves is in better shape than one who put 20% down and is house-poor on day one

That said, the math only works if you actually put the saved cash to productive use. Spending it on a new car or vacation defeats the comparison entirely.

What CMHC insurance does NOT do

• It doesn’t cover you if you can’t pay. You can still lose your home to foreclosure. The insurance just makes the lender whole afterwards.
• It doesn’t reduce your interest ratedirectly, but insured mortgages typically carry slightly lower rates than uninsured because the lender’s risk is offloaded.
• It doesn’t protect your home from market drops. That’s a separate insurance product (mortgage life insurance) that’s entirely optional.

The 2024 ceiling change you should know about

Until December 15, 2024, you could only get an insured mortgage on homes priced up to $1,000,000. Above that, you needed 20%+ down (uninsured), period.

That ceiling was raised to $1,500,000as of December 15, 2024 — meaning many more buyers in Toronto can now access insured mortgages on homes that would’ve required full 20% down before. This combined with the 30-year amortization expansion is the biggest practical change for first-time buyers in a decade.

How to use this information

The right down payment percentage isn’t universal. It depends on:

• How long you plan to own the home
• Your investment alternatives
• Your cash reserves after closing
• The premium tier you’d land in

Use the purchase calculator on this site to model different down payment scenarios — CMHC premiums calculate automatically. Or send me your numbers and I’ll run a personalized analysis.

Sources: CMHC Premium Schedule, Department of Finance Canada.