How much does a $900,000 mortgage cost?
A $900,000 mortgage is the reality for many buyers in Toronto and Vancouver. At this amount, even small rate differences have massive cost implications — a 1% difference in rate changes your total cost by over $150,000. Here’s exactly what you’re looking at.
Monthly payments at every rate
| Interest Rate | 25-Year Monthly | 30-Year Monthly | Difference |
|---|---|---|---|
| 3.00% | $4,259 | $3,793 | $466 |
| 3.50% | $4,494 | $4,041 | $453 |
| 4.00% | $4,734 | $4,296 | $438 |
| 4.50% | $4,980 | $4,560 | $420 |
| 5.00% | $5,234 | $4,831 | $403 |
| 5.50% | $5,493 | $5,110 | $383 |
| 6.00% | $5,758 | $5,397 | $361 |
| 6.50% | $6,029 | $5,689 | $340 |
| 7.00% | $6,306 | $5,989 | $317 |
Monthly payments include principal and interest only. Property taxes, insurance, and condo fees are additional.
Total cost of a $900,000 mortgage
| Interest Rate | Total Paid (25-yr) | Total Interest (25-yr) | Total Paid (30-yr) | Total Interest (30-yr) |
|---|---|---|---|---|
| 3.00% | $1,277,700 | $377,700 | $1,365,500 | $465,500 |
| 4.00% | $1,420,200 | $520,200 | $1,546,600 | $646,600 |
| 5.00% | $1,570,200 | $670,200 | $1,739,200 | $839,200 |
| 6.00% | $1,727,400 | $827,400 | $1,942,900 | $1,042,900 |
| 7.00% | $1,891,800 | $991,800 | $2,156,000 | $1,256,000 |
Key takeaway: At 5%, a $900K mortgage costs over $1.57 million total. At 7% over 30 years, total interest exceeds $1.25 million — that’s 1.4× the original mortgage amount paid in interest alone.
How your payments break down over time
Here’s how a $900,000 mortgage at 5% (25-year amortization) breaks down:
| Year | Annual Interest | Annual Principal | Remaining Balance |
|---|---|---|---|
| 1 | $44,370 | $18,440 | $881,560 |
| 5 | $40,850 | $21,960 | $802,500 |
| 10 | $35,100 | $27,710 | $688,500 |
| 15 | $27,450 | $35,360 | $541,800 |
| 20 | $17,330 | $45,480 | $352,100 |
| 25 | $4,230 | $58,580 | $0 |
25-year vs 30-year amortization
| Feature | 25-Year | 30-Year |
|---|---|---|
| Monthly payment (at 5%) | $5,234 | $4,831 |
| Total interest paid | $670,200 | $839,200 |
| Extra cost of 30-year | — | +$169,000 |
| Equity after 5 years | ~$97,500 | ~$65,100 |
| Who it’s for | Faster payoff, lower total cost | Lower monthly payments, more cash flow |
How payment frequency affects costs
| Frequency | Payment Amount | Annual Cost | Amortization | Interest Saved |
|---|---|---|---|---|
| Monthly | $5,234 | $62,808 | 25 years | — |
| Bi-weekly | $2,617 | $68,042 | 25 years | $0 |
| Accelerated bi-weekly | $2,617 | $68,042 | ~22 years | ~$75,600 |
Strategies to reduce your mortgage cost
- Choose a shorter amortization — 25 years instead of 30 saves $169,000 on a $900K mortgage at 5%
- Make accelerated bi-weekly payments — saves ~$75,600 and cuts 3 years off your amortization
- Use prepayment privileges — a $30,000 annual lump sum saves ~$120,000+ in interest
- Shop for a lower rate — 0.25% lower saves approximately $40,500 over 25 years
- Increase payments when you can — a $500/month increase saves ~$42,000 in interest
Insurance and qualification considerations
- Stress test — at this level, you must qualify at rate + 2% or 5.25%, whichever is higher — meaning qualify for payments of ~$6,500+/month
- Minimum income — most lenders require GDS ratio under 39% and TDS under 44%
- If your home is over $1 million — must put 20%+ down (uninsured), meaning this $900K mortgage comes from a $1.125M+ home
- If your home is under $1 million — you could potentially have an insured mortgage with lower rates
Where a $900,000 mortgage applies
- Detached homes in the GTA — Oakville, Burlington, Richmond Hill, Markham
- Townhomes in central Toronto or Vancouver — midtown, east end, or Burnaby
- Premium homes in Ottawa, Calgary, or Montréal — Westboro, inner-city Calgary, Outremont
- Move-up buyers — selling a condo or starter home with equity