25 vs 30-Year Amortization Comparison
$500,000 Mortgage at 5.00%
| Feature | 25-Year | 30-Year | Difference |
|---|---|---|---|
| Monthly payment | $2,908 | $2,672 | -$236/mo |
| Annual payments | $34,896 | $32,064 | -$2,832/yr |
| Total payments | $872,400 | $961,920 | +$89,520 |
| Total interest | $372,400 | $461,920 | +$89,520 |
| Mortgage-free date | 25 years | 30 years | +5 years |
$400,000 Mortgage at 5.00%
| Feature | 25-Year | 30-Year | Difference |
|---|---|---|---|
| Monthly payment | $2,326 | $2,138 | -$188/mo |
| Total interest | $297,800 | $369,680 | +$71,880 |
$700,000 Mortgage at 5.00%
| Feature | 25-Year | 30-Year | Difference |
|---|---|---|---|
| Monthly payment | $4,071 | $3,741 | -$330/mo |
| Total interest | $521,300 | $646,560 | +$125,260 |
Monthly Payment Savings by Mortgage Size
| Mortgage | 25-Year Payment | 30-Year Payment | Monthly Savings |
|---|---|---|---|
| $300,000 | $1,745 | $1,604 | $141 |
| $400,000 | $2,326 | $2,138 | $188 |
| $500,000 | $2,908 | $2,672 | $236 |
| $600,000 | $3,489 | $3,206 | $283 |
| $700,000 | $4,071 | $3,741 | $330 |
| $800,000 | $4,652 | $4,275 | $377 |
At 5.00% interest rate.
Eligibility
| Mortgage Type | 30-Year Available? | Requirements |
|---|---|---|
| Conventional (20%+ down) | ✅ Always available | Standard qualification |
| Insured (first-time buyer) | ✅ Since late 2024 | First-time buyer, CMHC eligible |
| Insured (new-build purchase) | ✅ Since late 2024 | Newly constructed home |
| Insured (non-first-time, resale) | ❌ | Max 25-year amortization |
| Refinance | ✅ (if 20%+ equity) | Conventional mortgage |
When 30-Year Makes Sense
| Situation | Verdict | Why |
|---|---|---|
| Need lower payment to qualify | ✅ Helps | Reduces GDS/TDS ratios |
| Cash flow is tight | ✅ Provides breathing room | $200-400/mo savings |
| Investing the monthly savings | ✅ Could work | If investments earn > mortgage rate |
| Just want less to worry about | ⚠️ Costly comfort | $70K-125K more interest |
| Planning aggressive prepayments | ✅ Good strategy | Low base payment + lump sums when able |
When 25-Year Is Better
| Situation | Why 25-Year |
|---|---|
| Can comfortably afford payments | Save $70K-125K in interest |
| Mortgage-free as a goal | Done 5 years sooner |
| Near retirement | Don’t want mortgage in retirement |
| Rates are high | Less total interest exposure |
| No plan to invest the savings | Just losing money to interest |
The “30-Year + Invest the Difference” Strategy
If you invest the monthly savings from a 30-year amortization:
| Scenario ($500K at 5%) | 25-Year | 30-Year + Invest Savings |
|---|---|---|
| Monthly mortgage | $2,908 | $2,672 |
| Monthly savings | $0 | $236 invested at 7% |
| Investment after 25 years | $0 | ~$178,000 |
| Extra interest paid | $0 | $89,520 |
| Net benefit | $0 | ~$88,480 ahead |
This strategy only works if you actually invest the savings consistently and earn a return higher than your mortgage rate.
Impact on Qualification
$100,000 income, 5% rate, no other debt:
| Amortization | Max Mortgage | Max Home (5% down) | Max Home (20% down) |
|---|---|---|---|
| 25 years | ~$440,000 | ~$463,000 | ~$550,000 |
| 30 years | ~$495,000 | ~$521,000 | ~$619,000 |
| Difference | +$55,000 | +$58,000 | +$69,000 |
Accelerated Prepayment Strategy
Take the 30-year for lower base payment, then use prepayment privileges:
| Action | Impact |
|---|---|
| Increase payment by 10-20% when able | Could pay off in 20-22 years |
| Annual lump sum (10-20% of original) | Knocks years off |
| Bi-weekly accelerated payments | ~4 extra payments/year |
Most lenders allow 10-20% annual prepayment privileges. Using them on a 30-year mortgage can bring the effective amortization down to 20-22 years.