The Default Insurance Tax You Pay at Closing (Not in Your Mortgage)
You signed for a $475,000 purchase price with 8% down. The mortgage default insurance premium, calculated at 3.10% of the loan amount, is $13,609. That premium gets added to your mortgage balance. You knew that. What showed up at the lawyer's office three days before closing was a separate line item: $1,769 in HST on the premium, payable in cash.
The premium itself is not a closing cost. It gets capitalized into the mortgage and amortized over 25 years alongside the principal. But the sales tax on the premium is not capitalized. It is collected at closing, in cash, along with legal fees and land transfer tax and every other line item on the statement of adjustments your lawyer sends over.
This structure is deliberate. CMHC, Sagen, and Canada Guaranty charge the premium and add it to the loan amount because that's how the insurance product is designed, the cost is financed over the life of the mortgage. But the federal and provincial governments tax the premium like a good sold at point of sale, which means the tax is due when the transaction closes, not over 25 years. The lender does not finance it. The insurer does not waive it. The lawyer collects it and remits it, and you need the cash.
On a 5% down payment, the premium rate is 4.00% of the insured amount. On a $450,000 loan that's $18,000, which means $2,340 in HST at closing in Ontario. On a 10% down payment, the rate drops to 2.80%, lowering the premium but not eliminating the tax. The percentages shift, but the rule doesn't: tax is always an out-of-pocket expense.
Most first-time buyers budget for land transfer tax and legal fees. Fewer budget for this. The premium sits on the mortgage paperwork and looks like part of the loan. The tax sits two pages later under "adjustments" and gets lumped in with property tax prorations and utility holdbacks. It doesn't announce itself. By the time the buyer sees the final number, the closing is a week out and the cash call has already been made.
Why 20% Down Eliminates Both Costs
At 19.9% down, you pay the premium and the tax. At 20%, you pay neither. The savings are not marginal, they are structural.
A $500,000 purchase at 19% down requires insurance on a $405,000 loan. The premium is $11,340. The HST is $1,474. At 20% down, the loan is $400,000, no insurance is required, and both charges disappear. The difference in loan amount is $5,000. The difference in upfront cash required is $1,474 plus whatever the premium would have cost in interest over the amortization period.
Crossing the threshold doesn't just save the premium. It removes the tax, and the tax is the part that hits your bank account before you get the keys.
You signed for a $475,000 purchase price with 8% down. The mortgage default insurance premium, calculated at 3.10% of the loan amount, is $13,609. That premium gets added to your mortgage balance. You knew that. What showed up at the lawyer's office three days before closing was a separate line item: $1,769 in HST on the premium, payable in cash.
The premium itself is not a closing cost. It gets capitalized into the mortgage and amortized over 25 years alongside the principal. But the sales tax on the premium is not capitalized. It is collected at closing, in cash, along with legal fees and land transfer tax and every other line item on the statement of adjustments your lawyer sends over.
This structure is deliberate. CMHC, Sagen, and Canada Guaranty charge the premium and add it to the loan amount because that's how the insurance product is designed, the cost is financed over the life of the mortgage. But the federal and provincial governments tax the premium like a good sold at point of sale, which means the tax is due when the transaction closes, not over 25 years. The lender does not finance it. The insurer does not waive it. The lawyer collects it and remits it, and you need the cash.
On a 5% down payment, the premium rate is 4.00% of the insured amount. On a $450,000 loan that's $18,000, which means $2,340 in HST at closing in Ontario. On a 10% down payment, the rate drops to 2.80%, lowering the premium but not eliminating the tax. The percentages shift, but the rule doesn't: tax is always an out-of-pocket expense.
Most first-time buyers budget for land transfer tax and legal fees. Fewer budget for this. The premium sits on the mortgage paperwork and looks like part of the loan. The tax sits two pages later under "adjustments" and gets lumped in with property tax prorations and utility holdbacks. It doesn't announce itself. By the time the buyer sees the final number, the closing is a week out and the cash call has already been made.
Why 20% Down Eliminates Both Costs
At 19.9% down, you pay the premium and the tax. At 20%, you pay neither. The savings are not marginal, they are structural.
A $500,000 purchase at 19% down requires insurance on a $405,000 loan. The premium is $11,340. The HST is $1,474. At 20% down, the loan is $400,000, no insurance is required, and both charges disappear. The difference in loan amount is $5,000. The difference in upfront cash required is $1,474 plus whatever the premium would have cost in interest over the amortization period.
Crossing the threshold doesn't just save the premium. It removes the tax, and the tax is the part that hits your bank account before you get the keys.
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