Compare three ways to use Ontario home equity by rate, payment, fees, flexibility, first-mortgage impact and total repayment plan.
Four points to remember
- A refinance replaces or changes the first mortgage; a second mortgage sits behind it; a HELOC is revolving credit.
- HELOC limits, total secured borrowing and lender policies are not the same thing.
- The lowest advertised rate may not be cheapest after penalties and fees.
- Match the product to a specific amount, use and repayment schedule.
Compare how each product works
A refinance increases or restructures the main mortgage. A second mortgage is a separate lump-sum loan registered behind the first. A HELOC is revolving secured credit that can be borrowed, repaid and reused up to the available limit.
- Refinance: one restructured mortgage
- Second mortgage: separate loan and payment
- HELOC: reusable variable-rate credit
- All use the home as security
Calculate available equity
Financial institutions may commonly permit total borrowing up to 80% of appraised value, subject to approval. A HELOC portion may be limited to 65% of the home’s value. Existing mortgage and secured balances reduce the remaining room.
- Obtain a realistic property value
- List all secured balances
- Apply the product-specific limit
- Subtract fees to estimate net funds
Account for the first mortgage
Refinancing may trigger a prepayment penalty and replace a favourable existing rate. A second mortgage or standalone HELOC may preserve the first mortgage but carry a higher rate and a second payment. A combined mortgage-HELOC product can have its own registration and switching implications.
- Current first-mortgage rate and maturity
- Estimated prepayment penalty
- Charge type and lender consent
- Cost of two payments versus one
Match the product to the purpose
A defined lump sum with a fixed repayment plan may fit differently from ongoing renovation draws or emergency access. Consolidating debt without changing spending habits can simply recreate the balances, so the use of funds and repayment process should be written down.
- One-time debt payout
- Renovation draws over time
- Bridge to a sale or refinance
- Investment or business use requiring tax advice
- Emergency reserve that should not become permanent debt
Run a total-cost comparison
Compare the same borrowing amount and time horizon for all three choices. Include rate changes, penalties, legal and appraisal costs, required payments and the balance remaining after the comparison period.
- Step 1: estimate available capacity
- Step 2: confirm the first-mortgage impact
- Step 3: calculate payment and fees
- Step 4: calculate balance after the planned period
- Step 5: choose the clearest repayment path
Frequently asked questions
Is a HELOC cheaper than a second mortgage?
It often has a lower starting rate and more flexibility, but it is usually variable-rate, may require stronger qualification and can encourage balances to remain outstanding. Compare total cost and repayment behaviour.
How much can I borrow with a HELOC?
A HELOC may be available up to 65% of a home’s appraised value, while total secured borrowing may commonly be limited to 80%, subject to lender approval and existing balances.
Should I refinance a low-rate first mortgage?
Not automatically. Compare the penalty and lost first-mortgage rate with the higher cost of keeping it and adding a second product.
Official sources and verification
This guide prioritizes primary information from governments, regulators and CMHC. Mortgage policies change; confirm the rules that apply when you apply.
This guide and its calculators are for general education only—not an approval, commitment, or legal, tax or investment advice. Actual rates, fees, underwriting and product terms vary by lender and application.