Yes, you can use a HELOC to pay off your mortgage. A HELOC is a home equity line of credit, and plenty of Ontario homeowners ask about it, usually at renewal time or after hearing about it online. For most people, replacing a mortgage with a HELOC is rarely the cheapest or safest path on its own.
That said, a HELOC can be a useful tool in the right situation. Some homeowners use one to pay off a small remaining balance. Others use home equity as part of a longer term investment and tax plan, which is a very different conversation.
This guide walks you through how it works in Canada, how much you can actually borrow under federal rules, the risks most people overlook, where the tax angle fits in, and the alternatives that often work better.
Can You Use a HELOC to Pay Off Your Mortgage?
Technically, yes. If your HELOC limit is large enough, you can draw on it and pay your mortgage balance out in full or in part.
The important thing to understand is what’s actually happening. You aren’t reducing what you owe. You’re swapping one debt secured by your home for another debt secured by the same home. The balance stays the same. Only the structure changes.
So why does the idea appeal to people? A few reasons:
- Flexibility. A HELOC lets you pay back as much or as little principal as you want, whenever you want.
- Lower minimum payments. Most HELOCs only require you to pay the interest each month.
- No prepayment penalty on the HELOC. You can pay it down or pay it off at any time without a charge.
Those features sound attractive, and for disciplined borrowers they can be. But each one has a flip side, which we’ll get to. First, there’s a bigger question: can you even borrow enough?
The 65% Rule: How Much You Can Actually Borrow
In Canada, banks and other federally regulated lenders follow rules set by the Office of the Superintendent of Financial Institutions (OSFI) under Guideline B-20. Two limits matter here:
- The HELOC portion on its own can’t exceed 65% of your home’s value.
- Your mortgage and HELOC combined can’t exceed 80% of your home’s value.
That first limit is the one that decides whether this strategy is even possible for you. If your mortgage balance is more than 65% of your home’s value, a HELOC can’t cover the whole thing.
A simple example
Say your home is worth $800,000.
- 65% of that is $520,000. That’s the most a HELOC could be.
- 80% of that is $640,000. That’s the most your mortgage and HELOC could add up to together.
If you owe $300,000 on your mortgage, a HELOC could potentially cover it, since $300,000 is well under the $520,000 limit.
If you owe $600,000, it can’t. That balance is above the 65% line, so no HELOC from a federally regulated lender could pay it off on its own.
What changed for readvanceable mortgages
Many Canadians have a readvanceable mortgage, which banks sometimes call a combined loan plan. It bundles a regular mortgage with a HELOC. Traditionally, every dollar of mortgage principal you paid down became a dollar of available credit on the HELOC side.
OSFI tightened this. Now, any borrowing above 65% of your home’s value has to be paid down on a regular schedule, like a normal mortgage. Principal payments on that portion reduce your overall limit instead of freeing up new credit, until the total gets back down to 65%.
These rules apply to banks and other federally regulated lenders. Some credit unions and alternative lenders set their own guidelines, which is one reason working with a mortgage agent who can compare across lenders can open up options your bank doesn’t offer.
How It Works in Practice
If you’re planning to use a HELOC to pay off your mortgage, there are two common routes.
Route 1: Convert part of your mortgage with your current lender
If you already have a readvanceable mortgage, or your lender offers one, you may be able to move some or all of your mortgage balance into the HELOC segment. It’s all with one lender, so the paperwork is usually simpler.
Route 2: Open a new HELOC and pay the mortgage out
You apply for a HELOC (with your current lender or a new one), get approved for a limit large enough, then use the funds to pay off the mortgage.
Timing matters more than most people think
If you’re in the middle of a closed mortgage term, paying it off early can trigger a prepayment penalty. Depending on your mortgage, that can be a significant cost. The Financial Consumer Agency of Canada explains how these penalties are calculated and suggests waiting until the end of your term if the penalty would be large.
Renewal is usually the cleanest time to make a change like this, because there’s no penalty for paying off the balance when your term ends.
Watch for collateral charges
Most HELOCs and readvanceable mortgages are registered as a collateral charge, often for more than you actually borrow. That’s what lets you access more credit later without a new application. The trade off is that switching to another lender down the road can be harder and more expensive, since the new lender usually can’t simply take over the existing registration.
The Risks Most People Don’t Think About
A HELOC is a flexible product. That flexibility is exactly what makes it risky if you use a HELOC to pay off your mortgage entirely.
Your payments can go up
Most HELOCs carry a variable rate tied to your lender’s prime rate. When prime goes up, your interest cost goes up with it. If you’re used to the predictability of a fixed mortgage payment, this can be a real shock to your budget.
Interest only payments can keep you in debt for years
A mortgage has an amortization schedule. Every payment chips away at the principal, and there’s an end date. A HELOC typically doesn’t. If you only make the minimum interest payment, you can pay for years and still owe exactly what you started with.
Your lender can reduce or freeze your limit
A HELOC is a line of credit, not a fixed loan. The FCAC notes that financial institutions can lower the credit limit on a HELOC at any time. That can happen if home values drop or your financial situation changes, which is often exactly when you’d want the flexibility most.
You still have to qualify
A HELOC isn’t automatic. You’ll need to meet the lender’s income, credit, and debt service requirements, including the federal stress test at banks and other federally regulated lenders.
The credit comes back
Every dollar you pay down on a HELOC becomes available to borrow again. For some people that’s useful. For others it’s a temptation that slowly turns a mortgage payoff plan into a permanent balance.
When Using a HELOC to Pay Off Your Mortgage Can Make Sense
For most homeowners, a full swap from mortgage to HELOC isn’t the best move. But there are situations where it can work well:
- You have a small balance left. If you’re close to the finish line and plan to clear the rest quickly, the flexibility of a HELOC can help you finish without being locked into a new term.
- You’re at renewal. With no penalty to break the mortgage, the cost of switching is much lower.
- Your income is irregular. Self employed borrowers or commission earners sometimes value the ability to pay less in slow months and more in strong months. This only works with a firm plan to pay the balance down.
- You need a short term bridge. For example, you expect a large sum in the near future (a property sale or inheritance) and want flexibility until it arrives.
In each of these, the common thread is a clear plan and a short timeline. A HELOC works best as a tool with an exit, not as a permanent replacement for a mortgage.
Using a HELOC as an Investment Tool: The Tax Angle
This is where the conversation changes, and where getting professional advice matters most.
Paying off your home mortgage with a HELOC doesn’t create a tax deduction
Interest on money you borrow for personal use is not tax-deductible in Canada, and that includes using a HELOC to pay off your mortgage on the home you live in.
Borrowing to earn income is treated differently
The Canada Revenue Agency (CRA) generally allows you to deduct interest on money borrowed for the purpose of earning income from a business or property. That can include a rental property or investments that pay interest or dividends. CRA explains its position in Income Tax Folio S3-F6-C1, Interest Deductibility, which it updated in 2024.
A few points worth knowing:
- CRA looks at what the money is directly used for, not what you meant to do with it.
- Investments expected to produce only capital gains generally don’t qualify.
- Mixing personal and investment borrowing in the same line of credit causes problems. It becomes hard to show which interest is deductible. Many people who use this approach keep separate HELOC segments or accounts for each purpose.
The Smith Manoeuvre
You may have heard of a strategy called the Smith Manoeuvre. In simple terms, it uses a readvanceable mortgage to gradually convert non deductible mortgage debt into investment debt, where the interest may be deductible. As you pay down the mortgage, you borrow back the freed up credit and invest it.
Some Canadians use this approach successfully. It’s also complex, it depends on your tax bracket, investments, and discipline, and the 65% rules described above affect how readvanceable mortgages work today.
The risks stack up
Using home equity to invest means borrowing against the roof over your head. If markets fall while your variable rate rises, you can end up with losses on your investments and higher payments at the same time.
Talk to an accountant first
Tax treatment depends on your full financial picture. Before you use home equity for any tax or investment strategy, speak with a qualified accountant or tax professional. They can tell you whether it makes sense for you and how to set it up properly. A mortgage agent can help with the borrowing side, but not the tax side.
What About an Unsecured Line of Credit?
Some people search for whether they can use a regular line of credit to pay off their mortgage. In almost every case, the answer is no.
Unsecured lines of credit aren’t backed by your home, so the limits are usually far too small to cover a mortgage balance. They also typically cost more than secured borrowing, which would make your debt more expensive, not less.
You may also see “velocity banking” promoted on social media as a way to pay off a mortgage in a few years using a line of credit. Much of that content is built around American loan products and assumptions that don’t carry over to Canada. Be cautious, and run the numbers with a professional before trying anything like it.
Better Alternatives for Paying Off Your Mortgage Faster
If your real goal is to be mortgage free sooner, these options often do more with less risk.
Use your prepayment privileges
Most closed mortgages let you make extra payments each year without a penalty, usually as an annual lump sum, a payment increase, or both. Check your mortgage documents to see what yours allows. Every extra dollar goes straight to principal.
Switch to accelerated payments
Accelerated biweekly or weekly payments add up to the equivalent of one extra monthly payment per year. It’s a small change that can meaningfully shorten your amortization.
Refinance or renegotiate at renewal
Renewal is your chance to shorten your amortization, adjust your payment, or restructure your debt without penalties. If you’re carrying other higher cost debt, a mortgage refinance to consolidate debt can simplify things into one payment.
If your bank says no
Not everyone qualifies for a bank HELOC or refinance, especially with credit challenges, self employment income, or a balance above the 65% line. That doesn’t mean you’re out of options. A second mortgage, a home equity loan, or a private mortgage may help you access equity when traditional lenders won’t. You can get a rough idea of your available equity with our home equity calculator. If any of the terms here are new to you, our mortgage glossary explains them in plain language.
Talk It Through Before You Decide
Using a HELOC to pay off your mortgage can work, but only when the numbers, the timing, and your plan all line up. Our agents operate under a licensed brokerage and can look at your full situation, compare options across lenders, and help you figure out whether a HELOC, a refinance, or something else makes the most sense.
The consultation is free and comes with no obligation. And if you’re considering a HELOC as part of an investment or tax strategy, we’ll encourage you to bring your accountant into the conversation too.
Frequently Asked Questions
Can I use a line of credit to pay off my mortgage?
A secured line of credit, like a HELOC, can be used to pay off a mortgage if the limit is high enough. An unsecured line of credit usually can’t, because the limits are much smaller and the cost is typically higher.
Is it smart to pay off a mortgage with a HELOC?
It depends on your situation. It can work if you have a small balance left, you’re at renewal, and you have a firm plan to pay the HELOC down. For most people, replacing a mortgage entirely with a HELOC adds rate risk and removes the structure that keeps debt shrinking.
Will I pay a penalty if I use a HELOC to pay off my mortgage?
The HELOC itself doesn’t have a prepayment penalty, but your mortgage might. If you pay off a closed mortgage before the end of its term, your lender can charge a penalty. Waiting until renewal usually avoids it.
How much can I borrow with a HELOC in Canada?
With a bank or other federally regulated lender, a HELOC can be up to 65% of your home’s value, and your mortgage and HELOC combined can be up to 80%. The amount you actually qualify for also depends on your income, credit, and existing debts.
Is HELOC interest tax deductible in Canada?
Not when the money is used for personal purposes, including paying off the mortgage on your home. Interest may be deductible when the borrowed money is used to earn income from a business or property. The rules are detailed, so speak with an accountant before relying on any deduction.
What if my bank won’t approve a HELOC?
You may still have options. Alternative and private lenders use different criteria than banks, and products like a second mortgage or home equity loan may let you access your equity. A mortgage agent can compare what’s available for your situation.
