For most of Canada’s mortgage history, 25 years was the maximum amortization period for insured mortgages — those with a down payment under 20%. In August 2024, the federal government changed that, extending the limit to 30 years for qualifying buyers as part of broader affordability measures.
The change is significant: extending amortization from 25 to 30 years lowers your monthly payment by slowing the pace of principal repayment. For many first-time buyers in Ontario, where a typical purchase requires a mortgage of $600,000 or more, this can mean $150–$250 less per month — which may be the difference between qualifying and not qualifying at all.
When 30-yr amortization became available for first-time insured buyers of new builds
Estimated monthly payment savings on a $600K mortgage vs. 25 years at same rate
Estimated additional interest paid over the full life of the 30-year mortgage
The stress test uses your amortization period to calculate your qualifying monthly payment. A 30-year amortization produces a lower payment — which means the same gross income qualifies you for a larger mortgage. This is one of the most practical ways the new rule helps first-time buyers qualify for more.
Who Qualifies for 30-Year Amortization in 2026
The extended 30-year option is not available to all insured mortgage borrowers. It comes with specific restrictions. Here’s a clear breakdown:
Under federal rules, a first-time buyer is someone who has not owned a qualifying home that they occupied as their principal residence at any time during the preceding 4 calendar years. If you owned a home and sold it more than 4 years ago, you may qualify again. Confirm with your mortgage broker before applying.
The Real Numbers: 25 Years vs. 30 Years
The case for 30-year amortization is straightforward: lower monthly payments. The case against it is equally clear: you pay significantly more in total interest. Here are the actual numbers for a typical Ontario purchase.
Assumptions: $650,000 purchase price, 10% down ($65,000), mortgage of $585,000 + CMHC premium, 5-year fixed rate of 4.04%.
$3,048/mo
Including CMHC insurance premium of 3.1% added to mortgage balance (≈ $18,135)
$2,840/mo
Same rate, same mortgage balance — only the repayment period changes
The 30-year option saves approximately $208 per month — but costs approximately $52,000 more in total interest over the full amortization period assuming the rate stays constant. In practice, you will renew multiple times and the actual comparison depends on rate paths over three decades.
Most insured mortgages allow annual lump-sum prepayments of 10–20% of the original balance. If your cash flow improves — after a promotion or bonus — making prepayments on a 30-year mortgage significantly reduces the total interest cost while maintaining the lower mandatory payment as a safety floor. This gives you flexibility without locking you into a higher required payment.
The CMHC Premium Surcharge for 30-Year Mortgages
CMHC added a premium surcharge for 30-year amortization mortgages to reflect the higher risk of slower principal repayment. This 0.20% surcharge is added to your standard CMHC insurance premium:
The 0.20% surcharge on a $600,000 mortgage adds roughly $1,200 to your insurance premium, which is rolled into your mortgage balance and amortized over the repayment period. This is a relatively minor cost compared to the monthly payment savings — but should be factored into your total cost calculation.
Should You Choose 30-Year Amortization?
Strong Case FOR 30 Years:
- ✓You are close to the stress test qualification limit and need a lower payment to qualify
- ✓Your income is growing and you plan to make voluntary prepayments to reduce total interest
- ✓You are buying in an expensive GTA or Greater Vancouver market where $200 monthly savings is meaningful
- ✓You are a first-time buyer and expect your financial position to improve significantly within 5 years
Strong Case AGAINST 30 Years:
- ✕You can qualify comfortably under 25-year amortization — taking 30 adds $50,000+ in interest unnecessarily
- ✕You are close to retirement and want to be mortgage-free sooner
- ✕You have other high-interest debt — paying down credit cards at 20%+ is a better use of the $200/month saved
Many mortgage professionals suggest this hybrid approach: take the 30-year amortization to qualify, but voluntarily pay the 25-year payment amount each month. This gives you the lower mandatory payment as a buffer during tight months, while keeping you on a roughly 25-year payoff trajectory the rest of the time. Confirm your prepayment privileges with your lender before adopting this strategy.
Calculate Your 30 vs. 25 Year Payments
Every mortgage situation is different. At mrates.ca, we help Ontario buyers compare amortization options with current rates from multiple lenders — so you choose the term that works for your budget and your goals.
Frequently Asked Questions
Can I switch from 30-year to 25-year amortization after I buy?
Yes, at renewal. When your mortgage term ends (typically every 1–5 years), you can request a shorter remaining amortization with your new term. Alternatively, making voluntary lump-sum prepayments throughout your term achieves the same effect — reducing remaining amortization without a formal change.
Does the 30-year option help my stress test qualification?
Yes, meaningfully. The stress test calculates your qualifying payment based on your amortization period. A 30-year mortgage has a lower monthly payment than a 25-year mortgage at the same rate — so the same gross income qualifies for a larger mortgage amount. This is one of the primary reasons many first-time buyers choose the extended option.
Can I get a 30-year insured mortgage on a condo?
Yes, condos are eligible under the same first-time buyer rules, provided the purchase price is under $1.5 million. Note that condo fees are included in your GDS ratio calculation, which reduces your qualifying amount — making the lower payment from a 30-year amortization especially useful for buyers in high-fee buildings.
Is the 30-year option available to repeat buyers with 20% down?
Yes. Buyers with 20% or more down — called uninsured mortgages — have always had access to 30-year amortization with no CMHC premium surcharge and no first-time buyer requirement. The news in 2024 was specifically the expansion to insured mortgages (under 20% down) for qualifying first-time buyers.
This article is for informational purposes only and does not constitute financial or mortgage advice. Payment examples are estimates based on April 2026 rates and assumptions; actual costs will vary. Please consult a licensed mortgage professional before making any financing decisions. mrates.ca is a mortgage rate comparison resource serving Ontario and Canada.