Extended amortizations are increasingly popular in Canada as home prices remain elevated. A longer amortization lowers your monthly payment — but the total cost of borrowing increases substantially. Here is exactly what each amortization length costs and who qualifies.
Amortization options in Canada
| Amortization | Availability | Down Payment Required | Typical Lenders |
|---|---|---|---|
| 25 years | Standard for all mortgages | 5%+ (insured) or 20%+ (uninsured) | All lenders |
| 30 years | Insured (first-time buyer, new build) or uninsured | 5%+ (if eligible) or 20%+ | Big 5, monoline, credit unions |
| 35 years | Uninsured only | 20%+ | Select B lenders, some credit unions |
| 40 years | Uninsured only | 20%+ | B lenders, private lenders |
| 50 years | Very rare | 20%+ | Select private lenders only |
Key policy changes (2024)
The 2024 federal budget made two significant changes:
- First-time homebuyers purchasing a new build can now get insured 30-year amortizations (previously capped at 25 years for insured mortgages)
- This was later extended in late 2024 to all first-time homebuyers (not just new builds) for insured mortgages
These changes expanded access to 30-year amortizations for buyers who could not previously meet the 20% down payment threshold.
Payment and interest comparison
$500,000 mortgage at 5.00%
| Amortization | Monthly Payment | Total Payments | Total Interest | Extra Interest vs 25-Yr |
|---|---|---|---|---|
| 25 years | $2,908 | $872,335 | $372,335 | — |
| 30 years | $2,618 | $942,480 | $470,285 | +$97,950 |
| 35 years | $2,430 | $1,020,600 | $573,420 | +$201,085 |
| 40 years | $2,305 | $1,106,400 | $681,030 | +$308,695 |
Monthly savings vs extra total cost
| Switch From → To | Monthly Savings | Extra Total Interest | Break-Even |
|---|---|---|---|
| 25 yr → 30 yr | $290/month | +$97,950 | Never — you always pay more total |
| 25 yr → 35 yr | $478/month | +$201,085 | Never |
| 25 yr → 40 yr | $603/month | +$308,695 | Never |
| 30 yr → 35 yr | $188/month | +$103,135 | Never |
The monthly savings look attractive. The total cost tells the real story.
How amortization affects qualification
Longer amortizations help you qualify for a larger mortgage because the lower payment reduces your GDS and TDS ratios.
$100,000 household income, 5% rate, $500/month other debts, 20% down
| Amortization | Max Mortgage (approx.) | Max Home Price |
|---|---|---|
| 25 years | $420,000 | $525,000 |
| 30 years | $455,000 | $569,000 |
| 35 years | $480,000 | $600,000 |
Important: For insured mortgages, the stress test still applies. You must qualify at the contract rate + 2% or the floor rate of 5.25%, whichever is higher — regardless of amortization length.
Who should consider extended amortization
Good candidates for 30-year amortization
| Scenario | Why It Works |
|---|---|
| First-time buyer needing affordability | Lower payment helps with qualification and cash flow in early career years |
| High-income borrower with investments | Freed-up cash earns more invested than the mortgage costs (rate arbitrage) |
| Self-employed with variable income | Lower required payment provides buffer in lean months |
| Planning aggressive prepayments | Start with 30 years but prepay to effectively have a 20-year mortgage |
| Buying in an expensive market | Necessary to afford entry into Toronto, Vancouver, etc. |
Candidates for 35–40-year amortization
| Scenario | Why It Works | Caution |
|---|---|---|
| Transitional affordability | Temporarily lower payments during career change or mat leave | Must have a plan to shorten later |
| Investment property cash flow | Lower payment improves rental property cash flow | Higher rate from B lenders may offset |
| Bridge to higher income | Expecting significant income growth within 5 years | Risky if income growth does not materialize |
Who should NOT extend amortization
| Scenario | Why It Is Risky |
|---|---|
| Stretching to afford a home beyond your means | You will build equity very slowly and pay enormously more in interest |
| No plan to make prepayments or shorten later | You are committing to decades of extra payments |
| Already carrying high debt | Extended amortization masks a debt problem |
| Close to retirement | Long amortization extends debt into retirement years |
Year-by-year equity comparison
$500,000 mortgage at 5.00% — equity built by year
| Year | 25-Year Amort | 30-Year Amort | 35-Year Amort |
|---|---|---|---|
| Year 1 | $10,450 | $7,500 | $5,800 |
| Year 5 | $60,800 | $44,300 | $34,700 |
| Year 10 | $139,700 | $104,500 | $83,300 |
| Year 15 | $241,500 | $186,700 | $152,200 |
| Year 20 | $373,300 | $298,200 | $249,600 |
| Year 25 | $500,000 (paid off) | $395,200 | $339,500 |
After 10 years, the 25-year borrower has $35,200 more equity than the 30-year borrower and $56,400 more than the 35-year borrower — with the same home and same rate.
Extended amortization with prepayments
The smartest use of extended amortization is combining it with voluntary prepayments. Start with a 30-year amortization for lower required payments, then prepay aggressively.
Strategy: 30-year amortization + 10% annual prepayment
$500,000 mortgage at 5.00%:
| Detail | 25-Year (No Prepay) | 30-Year (No Prepay) | 30-Year + 10% Prepay |
|---|---|---|---|
| Required monthly payment | $2,908 | $2,618 | $2,618 |
| Annual prepayment | $0 | $0 | $50,000 |
| Total interest paid | $372,335 | $470,285 | ~$185,000 |
| Mortgage paid off in | 25.0 years | 30.0 years | ~12.5 years |
This approach gives you the safety of lower required payments (in case of job loss or emergency) with the savings of aggressive prepayment when times are good.
Insured vs uninsured extended amortization
Insured (less than 20% down)
| Feature | 25-Year | 30-Year |
|---|---|---|
| Available to | All buyers | First-time buyers (as of 2024) |
| CMHC insurance premium | 2.80–4.00% of loan | Same premium schedule |
| Stress test | Contract rate + 2% | Contract rate + 2% |
| Rate | Standard insured rate | Standard insured rate |
| Max purchase price | $999,999 | $999,999 |
Uninsured (20%+ down)
| Feature | 25-Year | 30-Year | 35-Year |
|---|---|---|---|
| Available to | All buyers | All buyers | Select lenders |
| Insurance premium | None | None | None |
| Stress test | Contract rate + 2% | Contract rate + 2% | Lender-specific |
| Rate | Standard uninsured | Standard uninsured | Often 0.10–0.50% higher |
| Lender options | All lenders | Most A lenders | B lenders, some credit unions |
Impact on mortgage insurance premiums
Extending to a 30-year insured amortization does not increase CMHC premiums. The premium is based on your loan-to-value ratio:
| Down Payment | LTV | Insurance Premium |
|---|---|---|
| 5% | 95% | 4.00% |
| 10% | 90% | 3.10% |
| 15% | 85% | 2.80% |
However, the premium is calculated on a larger mortgage amount (if the extended amortization allows you to borrow more), which increases the dollar amount of the premium.
Shortening your amortization later
You are not locked into an extended amortization forever. Canadian mortgages renew every 1–5 years (typically 5), and at renewal you can:
- Choose a shorter amortization — switch from 25 years remaining to 20 or 15
- Increase your payment amount — most lenders allow payment increases of 10–20% per year during the term
- Make lump-sum prepayments — use annual prepayment privileges to reduce principal
- Switch lenders — at renewal, move to a lender offering better terms with a shorter amortization
Practical strategy
| Years 1–5 | Start with 30-year amortization to maximize cash flow |
|---|---|
| Renewal at Year 5 | Reassess income and expenses. Shorten to 20 or 22 years if affordable |
| Years 6–10 | Higher payments accelerate equity building |
| Renewal at Year 10 | Shorten to 15 years if possible |
| Result | Effective amortization of ~22 years despite starting at 30 |
The rate arbitrage argument
Some financial planners argue that extended amortization makes sense if you can invest the monthly savings at a higher return than your mortgage rate.
Example: $290/month savings (30 vs 25-year amort on $500K at 5%)
| Strategy | Mortgage Cost | Investment Return | Net Result |
|---|---|---|---|
| 25-year amortization | $372,335 interest | No extra to invest | — |
| 30-year + invest $290/month at 7% | $470,285 interest | $290/month × 30 years at 7% = ~$351,000 | +$253,050 net gain |
| 30-year + invest $290/month at 5% | $470,285 interest | $290/month × 30 years at 5% = ~$241,000 | +$143,050 net gain |
This works mathematically if:
- Your investment return exceeds your mortgage rate after tax
- You actually invest the savings (most people do not)
- You maintain the discipline for 30 years
- Your investments are in a tax-sheltered account (TFSA, RRSP)
If you would spend the savings rather than invest them, the 25-year amortization is unambiguously better.
Summary
| Amortization | Best For | Monthly Payment ($500K, 5%) | Total Interest | Extra Cost vs 25-Yr |
|---|---|---|---|---|
| 25 years | Standard — lowest total cost | $2,908 | $372,335 | — |
| 30 years | First-time buyers, cash flow flexibility | $2,618 | $470,285 | +$98K |
| 35 years | Transitional situations, investors | $2,430 | $573,420 | +$201K |
| 40 years | Last resort for qualification | $2,305 | $681,030 | +$309K |
The right amortization depends on your cash flow needs, investment discipline, and timeline for paying off the mortgage. Start long if necessary, but have a plan to shorten it.