The Debt Swap: Turning Mortgage Debt Into Investment Debt
Interest on a mortgage for your own home is not tax deductible in Canada. Interest on money borrowed to earn income from investments generally is. A debt swap uses that difference: you pay down your mortgage with savings you already have outside your registered accounts, then borrow the same amount back on a home equity line of credit and invest it. The debt is the same size. What changed is what the borrowed money is doing, and that is what decides whether the interest is deductible. I am Stacey Mass, Senior Mortgage Advisor with Quantus Mortgage Solutions, and setting up the mortgage structure for a swap is broker work, while the tax decision belongs to you and your accountant.
How a debt swap works, step by step
1. Start with savings outside your RRSP and TFSA. The swap runs on non-registered cash or investments you can sell. Money inside registered accounts plays no part in it.
2. Pay down the mortgage. The cash goes onto your mortgage, ideally inside your prepayment privilege so there is no penalty.
3. Borrow the same amount back and invest it. The borrowed money goes into investments that pay income, in a non-registered account, kept separate from your everyday banking so the trail stays clean.
4. The interest on that borrowing is generally deductible, because the borrowed money is now earning income. The interest on the mortgage you paid down never was.
Done once, the benefit is modest. Done a little at a time over several years, as more savings move across, the deductible portion grows and the benefit repeats every year. On a $40,000 swap at about 5%, roughly $2,000 a year of interest becomes deductible, worth about $500 to $700 a year at a typical retired Albertan's tax bracket.
The catch most people miss: the structure has to exist first
A standard mortgage has no line of credit attached to it, so there is nothing to borrow back on. A swap needs a readvanceable mortgage, one product that holds the mortgage and the line of credit together, so the line grows as the mortgage is paid down. If your current mortgage is a standard closed term, getting to a readvanceable product usually means refinancing to a new lender, and breaking a closed term early comes with a payout penalty plus closing costs. On the file that prompted this page, the penalty was about $2,400 and the total cost to switch about $3,450, which the first swap alone does not earn back. The multi-year version earns it back around year three. That math is exactly why the numbers get run before anyone moves.
Who a debt swap suits
• You have savings or investments outside your RRSP and TFSA.
• Your mortgage has room to pay down, or you are refinancing or renewing anyway.
• You are comfortable holding a line of credit balance that is invested, including when markets dip.
• You have cash or income to carry the line if rates rise, so you are never forced to sell at a bad time.
• Your accountant agrees the plan fits your tax situation before the money moves.
Who it does not suit
• Your savings are all inside registered accounts.
• The borrowed money would go into investments that pay no income. Growth-only holdings and funds that pay return of capital can break the deduction.
• A forced sale would hurt. If rising rates or a market drop would push you to sell, the strategy is working against you.
• You are close to selling the home. The structure costs money to set up and needs time to pay off.
Keeping the deduction clean
• Borrowed money goes only into income-producing investments, in a non-registered account.
• Keep the investment line separate. Do not run personal spending through it.
• Keep the paper trail: the paydown, the borrowing, and the investment purchase should be easy to follow, step by step.
• Check the plan with your accountant first, and again if your tax situation changes. This page explains the mortgage side only and is not tax advice.
The same idea, one step further: borrowing to buy a rental property
Everything above is about restructuring debt you already have. The related move is borrowing against a home you own to fund the down payment on a rental property. The structure questions are the same ones: which product the borrowing sits in, whether the interest treatment works, and whether the numbers still work at today's rates. If you are weighing a rental purchase, run the structure before you write the offer, not after.
For accountants
When your client asks about borrowing to invest, the tax answer is yours. The mortgage structure is the part that has to be set up before the money moves, and it is much harder to fix after the fact. If a client of yours is planning a swap, I am glad to run the structure and the switch costs in advance, share the numbers with you, and set up only what you have signed off on. No tax advice from my side, and client information stays confidential.
What happens when you reach out
1. A short call. You tell me what you are trying to do and roughly how much would move.
2. The numbers, all in. I price the readvanceable options across lenders, count the penalty and closing costs if a switch is needed, and show when the plan breaks even.
3. Your accountant checks the tax side. Nothing moves until they are comfortable.
4. Setup, in the right order. Paydown first, then the borrowing, then the investment, so the trail stays clean from day one.
Frequently asked questions
Is mortgage interest tax deductible in Canada?
Not on a home you live in. Interest is generally deductible only when the borrowed money is used to earn income, which is why the swap moves the borrowing from the house to the investments.
Do I need a special mortgage product for a debt swap?
Yes. You need a line of credit you can borrow back on as the mortgage is paid down, which means a readvanceable mortgage and line of credit combination. A standard mortgage has no line attached to it.
How much does it cost to set up?
If your current product already has a line of credit, very little. If you have to break a closed mortgage term to switch products, expect a payout penalty plus legal and appraisal costs. On a recent file that total was about $3,450, and the plan only made sense as a multi-year strategy.
Can I do a debt swap with my RRSP or TFSA savings?
No. The swap uses non-registered money. Registered accounts are not part of it, and borrowing to invest inside them creates tax problems instead of solving them.
What investments qualify?
Investments that pay income, such as interest or dividends, held in a non-registered account. Growth-only investments and return of capital distributions can put the deduction at risk. Your accountant confirms what fits.
Is this the Smith Manoeuvre?
No. The Smith Manoeuvre is a different, more involved strategy that converts mortgage debt over time as part of an ongoing plan. This page covers the simpler one-time or occasional swap only.
Should I do this without talking to an accountant?
No. The mortgage structure is my side. Whether the interest is deductible in your situation is a tax question, and it should be answered before any money moves.
Thinking about a debt swap? Run the numbers first.
A short call, no obligation, and you will see the switch costs and the break-even point before you decide anything. Or call 403-650-6596.
For accountants: email stacey@massmortgage.ca
and I will send the structure numbers for your client's file.
Stacey Mass, Senior Mortgage Advisor, Quantus Mortgage Solutions.
Serving Calgary, Foothills, and clients across Alberta. Mortgage services provided through Quantus Mortgage Solutions.
