CMHC mortgage insurance calculator (Ontario)
Estimate the mortgage default insurance premium (CMHC-style) when you put down less than 20%, plus Ontario's 8% sales tax on the premium.
Mortgage rules last reviewed: September 29, 2026
- Down payment
- $70,000 (10.0%)
- Mortgage before insurance
- $630,000
- Premium rate
- 3.10%
- Premium (added to your mortgage)
- $19,530
- Ontario sales tax on premium (8%), paid in cash at closing
- $1,562
- Total mortgage
- $649,530
For illustration only. Not a rate quote, approval or pre-qualification.
| Down payment | Premium rate |
|---|---|
| 5% – 9.99% | 4.00% |
| 10% – 14.99% | 3.10% |
| 15% – 19.99% | 2.80% |
| 20% or more | None |
How this is calculated
- Premium rates shown are for a 25-year amortization, applied to the loan amount and added to the mortgage.
- Ontario's 8% sales tax on the premium cannot be added to the mortgage — it is paid in cash at closing.
- Estimates only; the insurer sets the final premium.
Calculator disclaimer
Calculators are provided for general informational and illustrative purposes only.
Results are estimates and may not reflect lender-specific qualification requirements, mortgage-insurance premiums, taxes, fees, available products, payment calculations or other transaction costs.
Calculator results do not constitute:
- Mortgage approval
- Pre-approval
- A rate commitment
- A lending commitment
- Financial advice
- Tax advice
- Or legal advice
Mortgage rules, rates and lender requirements can change.
For advice about your specific circumstances, speak with the appropriate licensed professional.
But how does this apply to your business income?
This calculator estimates the numbers you entered. How a lender treats your salary, dividends or business income is a separate question, and it's the one the Mortgage Readiness Review looks at first.