If you need to pull equity out of your home, you have two paths: refinance your first mortgage for a larger amount, or stack a second mortgage behind it. The right answer depends on three numbers — and most homeowners only check one of them. The Three Numbers That Decide Your existing first mortgage rate (the one you might break). Your prepayment penalty on that first. The rate spread between today's refinance rate and a current second mortgage. Quick Decision Framework Your situation Usually wins First mortgage rate under 4.0%, fixed Second mortgage First mortgage rate over 5.5% Refinance Variable first mortgage Refinance (no IRD) Less than 12 months to renewal Wait + refinance at renewal Over 30 months to renewal, sub-4% rate Second mortgage Worked Example: When Second Mortgage Wins Anna in Burlington has a $480,000 first at 2.79% with 32 months left, on a $720,000 home. She needs $80,000. Refinance option New mortgage: $560,000 at 4.79% IRD penalty to break: $14,200 Legal/appraisal: $1,800 New monthly payment: $3,189 32-month additional cost vs status quo: ~$26,800 Second mortgage option $80,000 second at 8.49%, 2-year term Setup fees: $2,400 Monthly payment: $645 32-month interest cost: ~$17,600 Second mortgage saves ~$9,200 over the term. Use the mortgage penalty calculator to estimate your own IRD. Worked Example: When Refinance Wins Mark and Jess in Edmonton have a $310,000 first at 5.99% (variable, 6 months until renewal) on a $520,000 home. They need $40,000 for renovations. Second mortgage option $40,000 second at 9.49%, 1-year term Monthly payment: $337 12-month interest cost: ~$3,650 Refinance option New mortgage: $350,000 at 4.69% (early renewal) Penalty: 3 months interest = $4,640 New payment: $1,989 Saves $260/mo on existing principal vs current variable 12-month net cost vs status quo: ~$1,520 Refinance saves ~$2,130 over the year — and resets to a lower rate going forward. Blended Rate: The Often-Missed Math Most lenders will offer to "blend and extend" — keep your old rate on the existing balance and apply today's rate to the new money. Always run that quote. Example: $400,000 at 3.29% + $100,000 at 6.99% blends to ~4.03% on $500,000. That can beat both a refinance and a second mortgage. Calculate using our blended rate calculator. Total Cost Comparison Template Cost Refinance Second mortgage Blend & extend Penalty IRD or 3 months $0 $0 Legal $1,200–$1,800 $800–$1,500 $0–$500 Appraisal $300–$500 $300–$500 Often waived Lender fee $0 0–3% $0 Discharge of old first $200–$350 N/A N/A New monthly payment Lower than two-loan Sum of both Slightly higher than original When to Avoid Both If you need under $25,000 for under 12 months, a HELOC or personal line of credit is usually cheaper than either option once setup costs are amortized. See the full second mortgage vs HELOC pillar guide Ready to Get Started? Contact us today for personalized mortgage advice and competitive rates. Get Pre-Approved Call (416) 822-7357 Frequently Asked Questions Can I refinance and skip the second mortgage entirely? Yes if your existing rate is high or your penalty is low. Always run both numbers. Does a second mortgage trigger a new stress test on my first? No. The first mortgage is unchanged. Only the second is stress-tested. Will a refinance lower my monthly payment? Often yes if you re-amortize over 25 or 30 years. But you reset the clock — you may pay more total interest over your lifetime.
