CMHC mortgage premium guide: estimate your cost in Ontario

This guide explains what CMHC mortgage loan insurance is, when it applies, and a clear, ordered method you can follow to estimate your CMHC premium for a mortgage in Ontario. It includes labelled stop points to check official CMHC materials and a practical way to model outcomes with a mortgage calculator.

What CMHC mortgage loan insurance is and when it applies

Mortgage loan insurance through the Canada Mortgage and Housing Corporation (CMHC) protects the lender if a borrower defaults on a high-ratio mortgage. It is commonly required when a buyer makes a down payment smaller than 20 percent of the purchase price, creating what lenders call a high-ratio insured loan. For official rules, eligibility, and program details consult the CMHC Reference Guide and the CMHC Quick Reference fact sheet, which cover premiums, discounts, transfers, and eligibility criteria.

Who pays the premium

The borrower pays the mortgage loan insurance premium. Depending on lender and borrower choice, the premium may be added to the mortgage principal and paid through monthly payments, or it may be paid up front at closing.

When mortgage loan insurance is required

Most lenders require mortgage loan insurance if the down payment is less than 20 percent of the purchase price. The requirement and the way premiums are calculated are documented in CMHC materials; consult the CMHC Reference Guide for the full rules and any exceptions.

Basic terminology to know

• Loan-to-value (LTV): the mortgage amount divided by the property value or purchase price, used to determine premium bands.
• Insured amount: the portion of the mortgage covered by CMHC insurance when LTV triggers insurance.
• Premium: the cost of mortgage loan insurance, usually calculated as a percentage of the insured amount.

Step-by-step: estimate your CMHC premium

Follow these numbered steps to produce a reasonable estimate. Pause at each labelled stop point to confirm details with CMHC or a mortgage professional.

1. Gather the inputs you need

   Collect the core numbers: purchase price, planned down payment, expected mortgage amortization, whether the property is owner-occupied or an investment, and whether it is a new build or resale. These inputs determine the insured amount and the premium band.

2. Model the insured loan with a calculator

   Use a mortgage calculator that supports Canadian mortgage rules and the option to include CMHC premiums. Use the Malika Homes mortgage calculator to model the insured loan and see how adding the premium to principal affects monthly payments. If you use a third-party calculator, match inputs exactly to avoid discrepancies.

3. Reference the CMHC premium tables to confirm your percentage band — stop and check

   Stop and open the official CMHC premium tables in the CMHC Reference Guide. Identify the premium percentage that applies to your LTV band and property type. Do not finalise numbers until you confirm the correct band in the most current CMHC materials.

4. Apply adjustments and confirm eligibility for reductions

   Confirm whether program features affect your premium. For example, CMHC Eco Plus can provide a partial premium refund for qualifying energy-efficient homes, and portability or premium transfer rules may reduce future premiums. Check the CMHC Quick Reference and verify eligibility before applying any reductions.

5. Calculate the premium and choose a payment method

   Calculate the premium as: insured amount × premium rate. Decide whether to add the premium to the mortgage principal or pay it at closing. Use your mortgage calculator to compare scenarios and understand the monthly payment and total interest impact for each option.

Illustrative example walkthrough

The following example shows how inputs flow into an estimate. This is illustrative only. Always confirm current CMHC rates before acting.

Example inputs

• Purchase price: hypothetical
• Down payment: hypothetical
• Insured amount: purchase price minus down payment

Calculator steps

Enter purchase price and down payment into the mortgage calculator. Pause, open the CMHC Reference Guide to find the premium rate band that matches your LTV, multiply the insured amount by that rate, then model the premium paid up front versus capitalized into the mortgage to compare monthly payments and total cost.

Why this is illustrative not authoritative

CMHC updates premium information and program rules. This example demonstrates the method rather than specific rates. Confirm the applicable premium percentage in CMHC’s official materials before finalising figures: see the CMHC Reference Guide and the CMHC Quick Reference.

CMHC features that change your premium: Eco Plus, portability, discounts and transfers

Several CMHC features can reduce or alter the premium. Key items to check:

• Eco Plus partial refund: CMHC Eco Plus offers a partial premium refund (25 percent) to borrowers who buy or build qualifying climate-friendly housing using CMHC-insured financing. Confirm the rules in the CMHC Quick Reference.
• Portability and premium transfers: Portability and transfer rules can reduce the premium payable on a subsequent insured purchase for qualifying borrowers. Details and conditions are in the CMHC Reference Guide.

Always confirm eligibility with CMHC or your mortgage professional before relying on a discount or refund.

Ontario and GTA considerations

Ontario buyers should account for local items that affect carrying costs and planning:

• Pre-construction vs resale: Pre-construction deposit schedules can affect when you need insured financing. Plan deposit timing so you can confirm the final down payment before mortgage application.
• HST and rebates: For new builds, HST and potential rebates affect net purchase price and available funds for down payment. Factor these into your model when planning funds.
• Lender practices: Lenders may treat property types or investor purchases differently. Shopping lenders and comparing pre-approvals can produce different premium handling and lending terms.

Use the mortgage calculator to model Ontario-specific scenarios and to include HST or deposit timing when relevant.

Common objections and pitfalls to watch for

Buyers raise practical concerns. Here are common objections and how to mitigate them:

• "I do not want higher monthly payments." Model the premium as added principal and compare it with paying the premium up front. The mortgage calculator shows the monthly effect and total interest so you can decide.
• "I can avoid CMHC by using a different lender." If your down payment is under 20 percent, most conventional lenders will still require mortgage loan insurance. Alternative products exist but often have different costs or stricter terms.
• "Eco Plus or portability will definitely save me money." These features may help but eligibility rules apply. Confirm with CMHC or your mortgage professional.
• "Online calculators give different answers." Different tools use different default inputs. Match purchase price, down payment, amortization, and whether the premium is capitalized, then compare results. Always stop and confirm the premium percentage in CMHC official tables.

Verification checklist before signing: confirm the premium band in the CMHC Reference Guide, verify eligibility for any discounts or Eco Plus refund, model payment options in a calculator, and get a pre-approval or written confirmation from your lender.

Decision criteria and next steps

Quick yes/no checklist

• If your down payment is 20 percent or more, CMHC mortgage insurance typically will not apply.
• If your down payment is under 20 percent, prepare to estimate a premium and model it in monthly payments.
• If you are buying a new, energy-efficient home, check Eco Plus for possible refund eligibility.
• If you plan to buy again soon, ask about portability and premium transfers.

When to get a personalised CMHC premium estimate

Request a personalised, written premium estimate when you have a firm purchase price, confirmed down payment, and a lender pre-approval. A mortgage broker or lender can calculate the precise premium based on current CMHC tables and your full borrower profile. Always verify live premium bands in CMHC documentation before finalising numbers.

How to use Malika Homes tools and book a tailored consultation

Model scenarios with the Malika Homes mortgage calculator. When you are ready for a personalised review, contact a licensed mortgage professional or book a consultation with Malika Homes for help aligning purchase strategy, timing, and premium planning with your broader goals.

Resources and where to check current CMHC premium tables

Bookmark these official references before you finalise numbers: the CMHC Reference Guide for premium rules and the CMHC Quick Reference for program summaries and Eco Plus information. Both documents are the primary sources for current rates and eligibility. Use the Malika Homes mortgage calculator to model whether to capitalise the premium or pay it at closing.

CMHC Reference Guide and CMHC Quick Reference are the authoritative sources for premium tables, discounts, transfers, and program details.

Frequently asked questions

What is a CMHC mortgage premium and who pays it

The CMHC mortgage premium is the cost of mortgage loan insurance that protects lenders on high-ratio mortgages. The borrower pays the premium, and it can be added to the mortgage principal or paid up front at closing.

How can I estimate my CMHC premium for a specific Ontario purchase

Gather your purchase price and down payment, model the insured loan in a mortgage calculator, check the applicable premium percentage in CMHC’s Reference Guide, and multiply the insured amount by that percentage. Use the Malika Homes mortgage calculator to compare paying the premium up front versus adding it to the mortgage.

What is CMHC Eco Plus and how does the 25% refund work

CMHC Eco Plus provides a partial premium refund of 25 percent to qualifying borrowers who buy or build climate-friendly housing using CMHC-insured financing. Eligibility and application details are described in the CMHC Quick Reference; confirm your eligibility before assuming the refund applies to your purchase.

What does portability mean for CMHC premiums when I buy again

Portability allows eligible borrowers to reduce or eliminate the premium payable on a new insured loan when purchasing a subsequent home, subject to conditions and CMHC rules. Check the CMHC Reference Guide for portability and premium transfer rules.

Can I avoid CMHC mortgage insurance and what trade-offs should I consider

Avoiding CMHC insurance generally requires a down payment of 20 percent or more. Alternatives exist but often carry different costs or lending terms. Consider trade-offs such as higher upfront cash versus different monthly payments or interest rates, and consult a mortgage professional for tailored advice.

For help modelling your specific scenario or to get a personalised estimate, visit Malika Homes and use the mortgage calculator or book a consultation.