Amortization Periods: 25 vs. 30 Years

The amortization period is the total length of time it takes to pay off your mortgage in full, assuming you make all your regular payments and your interest rate stays constant. In Canada, the two most common amortization periods are 25 years and 30 years. The choice between them affects your monthly payment, the total interest you pay, how quickly you build equity, and even whether you qualify for certain mortgage products.

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Understanding the Trade-Off

A longer amortization means lower monthly payments but significantly more total interest paid over the life of the mortgage. A shorter amortization means higher monthly payments but less total interest and faster equity growth. Here is a side-by-side comparison:

Factor	25-Year Amortization	30-Year Amortization
Monthly payment	Higher	Lower
Total interest paid	Less	More
Equity built	Faster	Slower
Qualification	Available to all buyers	Restrictions may apply
Stress test impact	Higher qualifying rate needed	Slightly easier to qualify

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Detailed Payment Comparison

Let’s look at concrete numbers to see the real difference — you can also run your own scenarios with our mortgage calculator. These examples assume a fixed interest rate for the entire amortization period (in practice, your rate will change at each renewal, but this illustrates the structural difference).

Example 1: $400,000 Mortgage at 5.0% Interest

	25 Years	30 Years	Difference
Monthly payment	$2,326	$2,138	$188/month
Annual payment	$27,912	$25,656	$2,256/year
Total paid over full amortization	$697,544	$769,626	—
Total interest paid	$297,544	$369,626	$72,082

The 30-year amortization saves you $188 per month but costs you $72,082 more in total interest over the life of the mortgage.

Example 2: $450,000 Mortgage at 5.0% Interest

	25 Years	30 Years	Difference
Monthly payment	$2,630	$2,415	$215/month
Total interest paid	$339,000	$420,000	$81,000

Example 3: $550,000 Mortgage at 5.5% Interest

	25 Years	30 Years	Difference
Monthly payment	$3,334	$3,107	$227/month
Total interest paid	$450,200	$568,520	$118,320

At higher mortgage amounts and higher interest rates, the cost difference between 25 and 30 years becomes even more dramatic. On a $550,000 mortgage at 5.5%, the 30-year option costs over $118,000 more in interest.

Caution

The monthly savings from a 30-year amortization might look attractive — an extra $200 per month in your pocket. But over the full life of the mortgage, that convenience costs you $70,000 to $120,000 in additional interest. Make sure you are making this choice deliberately and not just defaulting to the lower payment without understanding the long-term cost.

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Eligibility Rules for 30-Year Amortization

The rules around who can access a 30-year amortization in Canada have changed multiple times in recent years. Here is the current landscape:

Insured Mortgages (Less Than 20% Down)

If your down payment is less than 20% and you need mortgage default insurance, the rules for 30-year amortization are:

• First-time buyers purchasing new construction: 30-year amortization is available as of late 2024 rule changes. This was introduced to improve affordability for buyers of newly built homes.
• First-time buyers purchasing resale homes: 30-year amortization is also available for first-time buyers as of the 2024 policy updates.
• Non-first-time buyers: The maximum insured amortization is typically 25 years unless purchasing a new build.

These rules have evolved rapidly. Always confirm the current rules with your lender or mortgage broker, as further changes may have occurred.

Uninsured Mortgages (20% or More Down)

If your down payment is 20% or more, you do not need mortgage insurance, and 30-year amortization is generally available regardless of whether you are a first-time buyer, the property type, or whether the home is new or resale. Lenders have more flexibility with uninsured mortgages because they are not bound by CMHC’s insurance guidelines.

Some lenders may even offer amortization periods beyond 30 years for uninsured mortgages, though this is less common and typically comes with a higher interest rate.

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The Equity Question

One often-overlooked consequence of choosing a longer amortization is how slowly you build equity in your home. Equity is the difference between your home’s value and what you owe on your mortgage. In the early years of a mortgage, most of your payment goes to interest rather than principal — and a longer amortization stretches out this interest-heavy period even further.

After 5 years on a $450,000 mortgage at 5%:

	25-Year Amortization	30-Year Amortization
Total payments made	$157,800	$144,900
Principal paid down	$59,400	$41,200
Remaining balance	$390,600	$408,800
Equity from payments	$59,400	$41,200

After five years, the 25-year borrower has paid down $18,200 more in principal. If home values stay flat, this extra equity provides more financial flexibility, a larger down payment if you sell and buy again, and more borrowing room for a home equity line of credit.

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When Does 30 Years Make Sense?

Despite the higher total interest cost, there are legitimate reasons to choose a 30-year amortization:

• Cash flow is tight: If you are stretching to afford a home, the lower monthly payment might be the difference between qualifying and not qualifying. The extra $200 per month can cover utilities, maintenance, or keep you above the stress test threshold.
• You plan to make prepayments: If your mortgage allows annual lump-sum prepayments (most do, typically up to 10-20% of the original principal per year), you can take the 30-year amortization for the safety of lower required payments while making extra payments when you can. This gives you the flexibility of low payments when money is tight and the ability to pay down faster when you have extra cash.
• Investment opportunity cost: Some buyers prefer a lower mortgage payment so they can invest the difference. If your investments earn more than your mortgage interest rate (after tax), this strategy can work — though it involves risk and discipline.

Tip

If you choose a 30-year amortization, set up automatic biweekly accelerated payments instead of monthly payments. This simple change means you make the equivalent of one extra monthly payment per year, which can shave roughly 3 to 4 years off your amortization with minimal impact on your cash flow. On a $450,000 mortgage at 5%, switching from monthly to biweekly accelerated payments saves approximately $45,000 in total interest.

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When Does 25 Years Make Sense?

A 25-year amortization is the better default choice for most buyers who can comfortably afford the higher payment:

• You want to minimize total interest paid — The interest savings of $70,000 to $120,000 are substantial.
• You want to build equity faster — Faster equity growth gives you more options down the road, including the ability to access home equity for renovations or other investments.
• You want to be mortgage-free sooner — Owning your home outright at 55 instead of 60 (or 45 instead of 50) is a meaningful lifestyle and retirement planning benefit.
• You qualify comfortably — If the monthly payment on a 25-year amortization fits well within your GDS and TDS ratios with room to spare, there is little reason to extend to 30 years.

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Next: Getting Pre-Approved