30-Year Insured Mortgages in Canada: Who Qualifies and What It Really Costs

What changed and when

Amortization is the total time it would take to pay off your mortgage if you kept the same payments, as opposed to your term, which is the length of your current contract. Insured mortgages, those with less than 20% down that require mortgage default insurance, had been capped at 25 years.

The first step came on August 1, 2024, when 30-year amortizations became available for first-time buyers purchasing newly built homes. The Department of Finance then broadened the measure: for mortgage insurance applications submitted on or after December 15, 2024, 30-year amortizations are available to all first-time homebuyers and to anyone buying a newly built home.

At the same time, the price cap for insured mortgages rose from $1 million to $1.5 million. That means a home priced below $1.5 million can be bought with less than 20% down, using the minimum of 5% on the first $500,000 and 10% on the portion above $500,000, as long as the buyer otherwise qualifies. Our guide to CMHC insurance covers how mortgage default insurance works in more detail.

Who qualifies for a 30-year insured mortgage

The Department of Finance sets out the eligibility rules. To get a 30-year amortization on an insured mortgage, the loan must have a loan-to-value ratio above 80%, which means a down payment below 20%, and the property must be occupied by the borrower or a close relative. Then you need to fall into at least one of two groups.

First-time homebuyers. You count as a first-time buyer under the federal rules if you meet any one of these criteria:

• You have never purchased a home before.
• In the last four years, you have not lived in a principal residence that you or your current spouse or common-law partner owned.
• You recently experienced the breakdown of a marriage or common-law partnership.

These criteria follow the approach used for the RRSP Home Buyers' Plan. If only one person in a couple meets the definition, ask your lender how the mortgage insurer applies the rule to your application.

Buyers of newly built homes. A newly built home is one that has not been previously occupied for residential purposes. The government has said this is not meant to exclude newly built condos with an interim occupancy period. You do not need to be a first-time buyer to qualify through this route.

All the other eligibility criteria for government-backed mortgage insurance still apply, including the stress test, debt ratio limits and credit requirements.

What about mortgages with 20% or more down?

The 25-year limit and the new 30-year exception apply to insured mortgages. If you put down 20% or more, your mortgage is generally uninsured, also called conventional, and the government's insured-mortgage rules on amortization do not apply in the same way.

Lenders set their own amortization limits on uninsured mortgages, within OSFI's underwriting expectations for federally regulated lenders. Ask what maximum your lender offers, and whether choosing a longer amortization changes the rate you are quoted.

In other words, the 2024 change mostly matters to buyers with smaller down payments. If you have 20% saved, a longer amortization may already be on the table, and the question becomes whether you want it.

The true cost: lower payment, more interest

A longer amortization spreads your principal over more payments, so each payment is smaller. The catch is that you owe interest on a larger balance for longer. For illustration, take a $500,000 mortgage at an assumed 4.5% interest rate, held at that rate for the full amortization, with monthly payments and the semi-annual compounding typical of Canadian fixed-rate mortgages:

• 25 years: a payment of about $2,767 a month and roughly $330,200 in total interest.
• 30 years: a payment of about $2,521 a month and roughly $407,600 in total interest.

That is about $246 a month of breathing room, in exchange for roughly $77,400 more interest over the life of the loan. Real results will differ because rates change at each renewal, but the pattern holds at any rate: the higher the rate, the bigger the extra interest.

FCAC shows the same effect with its own example: a $300,000 mortgage at 5% costs about $173,130 in interest over 20 years versus $276,386 over 30 years. Our guide to amortization explains why so much of each early payment goes to interest.

Insurance premiums and the 30-year surcharge

Insured mortgages carry a one-time default insurance premium, usually added to your mortgage balance. CMHC's premium schedule for owner-occupied homes ranges up to 4.00% of the loan amount when your loan-to-value ratio is between 90.01% and 95%, which is what you have with the minimum 5% down.

Choosing a 30-year amortization adds a premium surcharge. When it introduced 30-year amortizations for eligible first-time buyers in 2024, CMHC announced a surcharge of 20 basis points, or 0.20 percentage points, and its premium information lists a 0.20% surcharge for amortizations beyond 25 years. On a $475,000 insured mortgage, that is about $950 on top of a base premium of $19,000 at the 4.00% rate. Other mortgage insurers set their own premiums, so ask your lender for the exact figure.

Premiums themselves accrue interest when they are added to the mortgage. In Ontario, Quebec and Saskatchewan, provincial sales tax applies to the premium, according to CMHC, and that tax cannot be added to the loan, so it is due in cash at closing.

How a longer amortization affects qualifying

Lenders test your debt ratios at a qualifying rate higher than your contract rate. CMHC applies the greater of the contract rate plus 2% or 5.25% to insured loans. Because a 30-year amortization lowers the payment used in that calculation, it can increase the mortgage you qualify for, or help you pass the stress test on a home you were just short of.

That extra room is the point of the policy, but it is worth using carefully. Qualifying for more does not mean you should borrow more. A 30-year amortization on a bigger mortgage gives you neither the lower payment nor the lower interest; it simply buys a more expensive home with a longer debt.

A useful test is to pick a purchase price you could carry on a 25-year schedule, then decide whether to use 30 years to create a cushion rather than to stretch your budget.

Equity, renewals and the risk of stretching

Slower principal repayment means you build equity more slowly. In the $500,000 example, after five years you would still owe about $439,000 on a 25-year schedule versus about $455,500 on a 30-year one, a difference of roughly $16,500 in equity before any change in the home's value.

Lower equity matters if prices fall, if you need to sell early or if you want to refinance. It can also leave less room to absorb a higher rate at renewal, since there are fewer years left in the amortization to shorten as a fallback.

None of that makes a 30-year amortization a bad choice. It makes it a trade-off you should choose deliberately, with a plan for how and when you might speed up repayment.

Who a 30-year amortization tends to suit

A longer amortization tends to make the most sense for buyers whose income is likely to rise, such as people early in their careers, and for households that want a lower fixed obligation because their income varies or a parental leave is coming. In those cases, the lower payment is a safety margin, and extra payments can follow when money allows.

It is a weaker fit if the only way a purchase works is by stretching to 30 years at the very top of your approval. Then there is little room left for rate increases, repairs or a drop in income, and the higher lifetime interest is locked in by necessity rather than by choice.

Before deciding, run both schedules through a mortgage calculator using the rate you are actually quoted, and compare the monthly difference with the extra interest. Write down what you would do with the monthly savings. If the answer is build an emergency fund or prepay the mortgage, the longer amortization is working for you.

Getting the flexibility without all of the cost

One common strategy is to take the 30-year amortization for the lower required payment, then pay extra when you can. Most closed mortgages include prepayment privileges, such as the ability to raise your regular payment or make an annual lump-sum payment without penalty.

Switching to accelerated bi-weekly payments, or simply paying the 25-year payment amount voluntarily, can bring the effective amortization back down while keeping the option to fall back to the lower minimum in a tight month. Check your lender's exact prepayment limits before you sign.

Finally, revisit the decision at each renewal. If your income has grown, you can often shorten the remaining amortization then and recover much of the extra interest.

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