The conventional wisdom says "always put 20% down." Financial advisors repeat it. Your parents insist on it. And in many cases, they're right — 20% down eliminates CMHC insurance and reduces your monthly payments by hundreds of dollars. But conventional wisdom doesn't account for opportunity cost, market timing, or the new 2026 rules. Let's run the actual numbers. The Basic Comparison Scenario: $700,000 home purchase at 4.5% mortgage rate 20% Down Down payment cash needed $45,000 $140,000 Mortgage amount $655,000 $560,000 CMHC premium (added to mortgage) $26,200 (4.00%) $0 Total mortgage $681,200 $560,000 Monthly payment (25-year amort) $3,756 $3,089 Monthly payment difference +$667/month — Total interest paid (25 years) $446,560 $366,700 Total cost of homeownership $1,127,760 $1,066,700 20% down saves: $61,060 over 25 years. Sounds like a slam dunk for 20% down, right? Not so fast. What the Basic Math Misses Factor 1: Time to Save the Extra $95,000 If you're choosing between buying now at 5% or waiting 2–3 years to save 20%, you need to account for: The house price in 3 years: At 3% annual appreciation: $700,000 → $765,000 At 5% annual appreciation: $700,000 → $810,000 At 7% annual appreciation: $700,000 → $858,000 20% of the future price: $765K → $153,000 needed (vs $140K today) $810K → $162,000 needed $858K → $172,000 needed You're chasing a moving target. In hot markets, the goal line moves faster than you can run. Factor 2: Rent Paid While Saving At $2,500/month rent × 36 months = $90,000 in rent paid while saving for the larger down payment. That's money that builds zero equity. Factor 3: Equity Built While Owning If you buy now at 5% down and the home appreciates 4%/year: Year 1: $28,000 in appreciation + ~$12,000 in principal paydown = $40,000 equity gained Year 3: ~$84,000 in appreciation + ~$38,000 principal = $122,000 total equity Plus your original $45,000 down payment After 3 years, you have ~$167,000 in equity — more than the 20% down payment you were trying to save. The Opportunity Cost Calculation What if you invested the $95,000 difference instead of putting it toward your home? Worried About Your Down Payment? You may be able to buy sooner than you think. Learn about low down payment options and first-time buyer programs. Explore Options $95,000 invested at 7% annual return over 25 years = $514,000 But this comparison is flawed because: You don't have the $95,000 — you're still saving it You're paying rent while saving (negative return) Home equity appreciation is leveraged (you gain on the full home value, not just your down payment) Leverage: The Real Advantage of Low Down Payment With 5% down on a $700,000 home, your $45,000 controls a $700,000 asset. If the home appreciates 5%: Home value increase: $35,000 Return on your $45,000 investment: 78% With 20% down, the same appreciation gives: Home value increase: $35,000 Return on your $140,000 investment: 25% Low down payment = higher leveraged return on your cash. The 30-Year Amortization Factor (2026 New Rule) See the Numbers for Your Home Compare monthly payments and total costs at different down payment levels. Use the Calculator First-time buyers and new construction purchasers now qualify for 30-year amortization on insured mortgages. This changes the math: 20% Down, 25-Year Amort Monthly payment $3,452 $3,089 Difference +$363/month — The gap shrinks from $667/month to just $363/month with the extended amortization. That's only $12/day more — the price of a fancy coffee. When 5% Down Wins Rising market — Home prices growing faster than your savings rate High rent costs — Rent payments exceeding what mortgage payments would be Strong income, limited savings — You can afford payments but haven't accumulated cash New construction with 30-year amortization — Monthly payment difference is minimal Young buyers — More time for home appreciation and mortgage paydown You have better use for the cash — Investment returns exceeding mortgage rate When 20% Down Wins Stable or declining market — No urgency to buy, time to save Low rent relative to ownership costs — Renting is cheaper than owning Risk averse — Lower payments and maximum equity cushion Planning to stay long-term — Insurance cost amortized over full term Already have the savings — No opportunity cost of waiting Investment property — 20% minimum required anyway Real Scenario: Toronto vs Edmonton Toronto ($900,000 Home) 20% Down in 3 Years Down payment $55,000 ~$200,000 (5% appreciation) CMHC premium $33,800 $0 Rent paid while saving $0 $108,000 Home appreciation captured $140,000 (3 years) $0 Net advantage +$98,200 — In Toronto's market, buying at 5% down is significantly better financially. Edmonton ($400,000 Home) 20% Down in 2 Years Down payment $20,000 $80,000 CMHC premium $15,200 $0 Rent paid while saving $0 $36,000 Home appreciation captured $24,000 (2 years at 3%) $0 Net advantage +$44,800 — Even in affordable Edmonton, buying sooner edges ahead — but the margin is narrower. The Best Strategy: Hybrid Approach Consider a middle ground: Put 10% down (3.10% CMHC premium vs 4.00% at 5%) Save the difference between 10% and 20% in your FHSA Apply a lump sum at renewal (most mortgages allow 10%–20% annual prepayment) Renegotiate to uninsured at renewal once equity exceeds 20% This gets you into the market sooner while reducing your insurance cost by 23%. What's Next The right down payment amount is personal — it depends on your market, income, savings, and risk tolerance. Review the full down payment requirements, then connect with a BestRates specialist to run the numbers for your specific situation. Run Your Own Comparison Our specialists will model 5%, 10%, 15%, and 20% down scenarios for your specific home and income. Get Your Analysis Ready to Make Your Move? Find out how much you can afford and what down payment you really need. Free, no-obligation consultation. Calculate Affordability Call (416) 822-7357 Frequently Asked Questions Q: Can I get a refund on CMHC insurance if I reach 20% equity early? A: No. The premium is non-refundable and non-cancellable. However, at renewal, you won't need new insurance. Q: Do insured mortgages actually get lower interest rates? A: Often yes — because the lender has zero default risk. This can offset 0.10%–0.20% of the rate. Q: Should I use my RRSP for the down payment or keep it invested? A: If your RRSP investments earn less than your mortgage rate plus amortized insurance cost, the HBP withdrawal may make sense. Q: Is 10% down a good compromise? A: It reduces insurance premiums versus 5% while requiring less cash than 20%.
