How this calculator works
Loan-to-value (LTV) is one of the most important numbers in Canadian mortgage lending. It's simply your mortgage (loan) amount expressed as a percentage of the property's value:
LTV = (loan amount ÷ property value) × 100
The complement of your LTV is your down payment percentage (on a purchase) orequity percentage (on a refinance) β the two always add up to 100%. 80% LTV is the single most important threshold in Canada: at or below it, your mortgage is "conventional" and needs no default insurance; above it, it's "high-ratio" and must be insured by CMHC, Sagen, or Canada Guaranty, up to a maximum of 95% LTV on an eligible home. This calculator shows your exact LTV, your down payment/equity figures, and the tier your result falls into.
Worked example
Say you're buying a property valued at $500,000 with a $400,000 mortgage. Your LTV is exactly 80% ($400,000 Γ· $500,000), meaning your down payment makes up the remaining 20%, or $100,000 β right at the conventional/high-ratio threshold, so no default insurance is required. By contrast, a $450,000 mortgage on the same $500,000 property gives a 90% LTV, with a $50,000 (10%) down payment β comfortably within insured-financing limits, but requiring CMHC (or equivalent) default insurance since it's above 80%.
What affects your result
- Down payment size β the single biggest lever on a purchase; crossing 80% LTV specifically avoids default insurance entirely.
- Property appraisal β on a refinance, your LTV depends on the lender's current appraisal of your property, not necessarily what you paid for it.
- Mortgage balance paid down β every principal payment reduces your loan amount and therefore your LTV over time, gradually moving you toward or below the 80% threshold even without prepaying extra.
- Prepayments β a lump-sum or extra monthly prepayment can be a deliberate strategy to cross the 80% threshold ahead of a refinance or to remove default insurance.
A note on accuracy
The LTV tiers shown reflect the standard federal insured-financing thresholds (65/80/95%), not a specific lender's pricing criteria, which can vary. This calculator does not factor in appraisal fees, legal fees, or a lender's specific risk appetite. For guidance on LTV and insured financing, seeCMHC β Mortgage Loan Insurance.