What does refinancing a mortgage mean?

When you refinance, your existing mortgage is paid out and replaced or restructured with new mortgage financing. The new mortgage may have a different balance, lender, interest rate, term, payment frequency or amortization.

This is different from a straightforward renewal. At renewal, you generally negotiate a new term for the balance already owing. A refinance can increase the mortgage amount or make a more significant change to the financing. For a broader overview of the available pathways, visit the Mortgage Refinancing in Ontario hub.

Ontario homeowners commonly consider refinancing to combine credit cards or lines of credit, finance renovations, access funds for a major goal, buy out another owner’s interest, or reorganize their mortgage when their circumstances have changed.

How the mortgage refinance process works

1. Define what the refinance needs to accomplish

Start with the outcome rather than a rate. List the debts or expenses involved, the funds required, the monthly payment you can manage and how long you expect to keep the new mortgage. This creates a clear target for comparing options.

If the goal is debt consolidation, record each balance, interest rate and required payment. If the goal is accessing equity, identify both the amount needed and how it will be used. Borrowing against the home should support a defined plan because the new debt will be secured by the property.

2. Estimate your available home equity

Home equity is the difference between the property’s current value and the debt secured against it. The Financial Consumer Agency of Canada states that homeowners may usually borrow up to 80% of their home’s value through home-equity borrowing, although the actual limit and approval depend on the lender and application.

For example, if a property is worth $650,000, 80% is $520,000. If the existing mortgage balance is $350,000, the theoretical room below that level is $170,000. That is not an approval: penalties, fees, other secured debts, lender policy, property acceptability and the borrower’s qualification can all reduce the amount available.

3. Review qualification

A lender generally assesses the refinance as a new application. The review may include income and employment, credit history, current debts, housing costs, the property and the purpose of the funds. Supporting documents commonly include identification, income documents, mortgage statements, property-tax information and statements for debts being paid out.

Federally regulated lenders apply the uninsured-mortgage stress test. As of this page’s review date, the Office of the Superintendent of Financial Institutions lists the minimum qualifying rate as the greater of the mortgage contract rate plus 2% or 5.25%. Other lenders and mortgage products may apply different policies, so the rate used for qualification is not necessarily the rate used to calculate the actual payment.

4. Confirm the property value

The lender needs an acceptable property value to calculate the loan-to-value ratio. Depending on the lender, property and requested mortgage amount, value may be supported by an automated valuation, a desktop review or a full appraisal. The final lending value can differ from a homeowner’s estimate or a real-estate listing estimate.

5. Compare the complete cost

If the current mortgage is closed and the refinance occurs before the end of its term, the existing lender may charge a prepayment penalty. The amount depends on the mortgage contract and may be based on three months’ interest, an interest-rate-differential calculation or another contractual method.

There may also be appraisal, legal, title-insurance, registration, discharge or administrative costs. Ask the current lender for a written payout statement or penalty quote rather than relying on a rough estimate. The Financial Consumer Agency of Canada notes that breaking a closed mortgage can cost thousands of dollars.

6. Select the mortgage structure

Once qualification and costs are understood, compare suitable mortgage amounts, rates, terms and amortizations. A longer amortization may reduce the required payment, but it can keep the debt outstanding longer and increase total interest. A shorter amortization normally requires a higher payment but repays principal faster.

This step should also compare refinancing with alternatives such as waiting until renewal, using a home equity line of credit or leaving certain debts outside the mortgage. The lowest immediate payment is not automatically the best overall result.

7. Complete approval conditions and closing

After approval, the lender may require updated documents, an appraisal, proof that certain debts will be paid, or other conditions. A lawyer or other permitted closing provider then completes the mortgage registration and payout process. The existing mortgage and any debts included in the transaction are paid according to the lender’s and lawyer’s instructions, and any approved remaining funds are released.

Potential benefits and tradeoffs

Potential benefits

• Lower total monthly outflow: combining several required payments into one mortgage payment may improve immediate cash flow.
• Access to home equity: approved funds may be used for renovations, investment, major expenses or another defined purpose.
• A simpler debt structure: replacing multiple debts with one scheduled payment may make the household budget easier to manage.
• Different mortgage terms: a refinance may allow a different rate type, term, lender or amortization when those changes fit the homeowner’s plan.

Costs and risks

• Debt becomes secured by the home: credit-card or line-of-credit balances moved into the mortgage are now tied to the property.
• Repayment may be extended: a lower payment can result from paying the debt over a longer period.
• Penalties and closing costs apply: these costs can materially change the break-even point.
• Equity is reduced: increasing the mortgage leaves less ownership value available for future needs or a sale.
• Reborrowing creates risk: consolidating revolving debt without changing the spending or repayment plan can leave the homeowner with a larger mortgage and new unsecured balances later.

An illustrative Ontario refinance example

Consider a homeowner with a property valued at $650,000, a $350,000 mortgage, $20,000 in credit-card debt and a $15,000 line of credit. Assume $7,000 is added for a mortgage penalty and closing-related costs, producing an illustrative new mortgage of $392,000.

The example improves the displayed monthly cash flow, but the mortgage balance increases by $42,000 and the added debt may be repaid over 30 years. A responsible comparison would also consider prepayment plans, the likelihood of rebuilding unsecured balances and whether a smaller refinance or different structure could achieve the goal.

When refinancing may—or may not—make sense

A refinance may deserve closer review when the homeowner has sufficient equity, can qualify for the new mortgage, has a clear use for the funds and receives a meaningful benefit after costs. It can also be useful when several expensive payments are putting pressure on monthly cash flow and there is a realistic plan to avoid rebuilding the debt.

It may be less suitable when the penalty and fees outweigh the expected benefit, the homeowner plans to sell soon, the new payment is not sustainable, the refinance depends on an unsupported property value, or the main result comes only from stretching short-term debt across a much longer amortization.

Before proceeding, compare the numbers and ask: What improves immediately, what does this cost over time, what happens to my equity, and what is my plan after the refinance? The companion guide Should I Refinance My Mortgage? provides a more detailed decision framework.

Frequently asked questions

Sources and current-information references

• Financial Consumer Agency of Canada: Borrowing against home equity
• Financial Consumer Agency of Canada: Breaking your mortgage contract
• OSFI: Minimum qualifying rate for uninsured mortgages
• Financial Consumer Agency of Canada: Discharging a mortgage

General information only: This page is educational and does not constitute financial, legal or tax advice, a mortgage approval, or a commitment to lend. Mortgage options, rates, qualification and costs depend on the borrower, property, lender and timing. Information was reviewed on September 6, 2026; verify current requirements before making a decision.