The Debt Swap
in Ontario

Before the swap there is a mortgage and a portfolio; after the swap there is a smaller mortgage, an investment loan of roughly the same size, and a repurchased portfolio. What changes is the character of the debt: interest on a loan used to buy income-producing investments may be deductible, while interest on a home mortgage is not. That is the entire point — same assets, same total borrowing, different tax treatment.

Inside the Mortgage Wealth Creator™ framework, debt swapping sits alongside the re-borrow-and-invest strategy and cash damming as one of three conversion tools — and it is the one with the narrowest entry requirement. You cannot swap what you do not own: the strategy only exists for households that already hold taxable investments outside their registered accounts.

1. Confirm the structure first. The re-borrowing side usually runs through a readvanceable mortgage or a home equity line of credit with a segment reserved for investing and nothing else. Federal underwriting rules bound that structure: under OSFI’s Guideline B-20, the revolving credit-line portion is capped at 65 per cent of the home’s value, with total combined lending capped at 80 per cent. Arranging the structure is the piece a mortgage agent actually handles.
2. Sell the non-registered investments. This is a taxable disposition — accrued gains are realized, which is why the tax math comes before the mortgage math, in your accountant's office.
3. Pay the proceeds against the mortgage. Within prepayment privileges during the term, or without penalty at renewal. The non-deductible balance drops by the full amount of the sale.
4. Re-borrow and repurchase. The paydown creates borrowing room; the household draws the same amount from the dedicated investment segment and repurchases income-producing investments, chosen with their own investment advisor — never by a mortgage agent.
5. Document the chain, dollar for dollar. Sale, paydown, re-advance, purchase — one clean paper trail from borrowed dollar to income-earning use is what makes the interest defensible.

The two are not rivals — some households run a debt swap first, then continue with a re-borrow-and-invest strategy on the same structure. The full walkthrough of the gradual approach is in the re-borrow-and-invest strategy guide; business and rental owners converting through their expenses should read about cash damming instead.

The profile is specific. A household with a mortgage but no taxable investments has nothing to swap; a household with investments but no mortgage has nothing to convert. It is the overlap — a portfolio on one side of the ledger, a mortgage on the other — that makes the strategy worth examining at all. Scotia Wealth Management's overview of the strategy frames it the same way: a repositioning of what already exists, not a leap into new borrowing.

Timing matters twice. On the mortgage side, renewal is the cheapest moment to restructure — the term is ending anyway, so paydown and re-borrowing can be built into the new arrangement without penalties. On the tax side, the year of sale determines when any capital gain lands, which is a planning question for your accountant, not your lender.

Registered accounts are a different conversation entirely: the strategy is about non-registered holdings, and moving money out of an RRSP, TFSA or similar shelter carries consequences of its own — a question for your own tax professional, not this page.

This is the swap's real price tag, and it varies enormously. A portfolio with little accrued gain can often be repositioned at modest tax cost; a portfolio carrying decades of growth may face a bill large enough to outweigh years of interest deductions. There is no general answer — only your numbers, run by your accountant, before the first trade.

Losses cut the other way, with a trap attached: if an investment is sold at a loss and the identical investment is repurchased within 30 days before or after the sale, the superficial-loss rule may deny the loss for tax purposes. Households swapping positions that are underwater sometimes repurchase different — though comparable — investments, a decision that belongs to their investment advisor and tax professional, never to a mortgage agent.

Because the same assets are repurchased, a debt swap adds little new market risk — but it does not remove any either. After the swap, the household services an investment loan whose interest is due in flat markets and falling ones alike, and a deduction softens that cost only when the paperwork holds and the tax rules stay as they are. The days between sale and repurchase carry their own small risk: markets can move while the money is in transit.

Whether the arithmetic favours a swap in your case — or favours doing nothing — is exactly what a Mortgage Wealth Review™ looks at, with the tax questions routed to your own professionals where they belong.