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Canadian Mortgage Glossary · Mortgage Types & Features

Insurable Mortgage

Definition

An insurable mortgage is a conventional (low-ratio) mortgage that still meets an insurer’s eligibility criteria for portfolio (bulk) insurance, even though the borrower isn’t required to buy individual default insurance.

Updated: August 1, 2026 Reviewed by the Treadstone underwriting desk
№ 01

If the down payment is 20%+, why would the mortgage still be insured?

Insurable status is about the lender’s funding, not the borrower’s cost. A lender can buy portfolio (bulk) insurance on a batch of eligible conventional mortgages to reduce its own risk and access cheaper funding — without the borrower ever paying a premium or knowing the file was insured.

To qualify as insurable, a conventional mortgage generally has to meet criteria that echo the insured-mortgage rulebook, such as price and amortization limits, even though it wasn’t originated as an insured mortgage. A conventional mortgage that doesn’t meet those criteria — a rental property or a loan with cash-back, for example — is simply an uninsured mortgage instead.

№ 02

How it’s used in Canada

Borrower cost is unaffected: the borrower doesn’t pay a premium either way — insurable status affects how the lender funds the loan, not what the client is charged.

Eligibility mirrors insured rules: insurers set criteria for bulk-insuring conventional mortgages that echo much of the insured rulebook, including price and amortization limits.

Distinct from high-ratio insurance: this is portfolio (bulk) insurance the lender buys on its own book, not the mandatory individual default insurance required on a high-ratio file.

Relevant to funding cost, not approval: whether a given conventional file is insurable can affect a lender’s pricing and appetite, which brokers sometimes see reflected in the rate offered.

Sources

  1. 1.CMHC — Mortgage loan insurance homeownership programs cmhc-schl.gc.ca
  2. 2.OSFI — Guideline B-20, Residential Mortgage Underwriting Practices and Procedures osfi-bsif.gc.ca

Definitions reflect Canadian federal and provincial rules as of the “Updated” date above. Not advice for any specific file.

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