Mortgage calculator

Down payment and mortgage insurance calculator

Calculate the minimum down payment, estimated mortgage-insurance premium, Ontario tax on the premium, and total mortgage.

Reviewed August 31, 2026Published by Ontario Mortgage HelpCalculation standard
Estimated total mortgage$742,320Base mortgage plus the estimated insurance premium.
Minimum down payment
$55,000
Base mortgage
$720,000
Insurance premium
$22,320 (3.10%)
Ontario tax on premium
$1,786
Down payment percentage
10.0%

Insurance is normally required below 20% down for eligible owner-occupied purchases under $1.5 million. Ontario’s 8% tax on the premium is generally paid in cash and cannot be added to the mortgage. Insurer and lender approval still apply.

How to use this estimate

Use current documents.Enter figures from the mortgage statement, renewal offer, payout quote, appraisal, or commitment where possible.

Compare like with like.Use the same balance, time period, and payment frequency when comparing alternatives.

Check the actual terms.Qualification, fees, compounding, privileges, and lender calculations may produce different results.

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