Canadian investor guide
The Smith Manoeuvre: making mortgage interest tax-deductible in Canada
The Smith Manoeuvre is a Canadian debt-conversion strategy, developed by financial planner Fraser Smith, that gradually turns non-deductible mortgage debt into tax-deductible investment debt. This guide explains how it works, the tax rules behind it, and the risks — and how Apis Financial's HELOC investing tracker keeps the records straight.
How it works
Step 1
Get a readvanceable mortgage
The strategy needs a mortgage paired with a home equity line of credit (HELOC) where every dollar of principal you repay becomes new HELOC room. Not all mortgages do this — the readvanceable feature is the engine.
Step 2
Make your mortgage payments as usual
Each payment splits into interest and principal. The principal portion is what creates new re-borrowable room on the HELOC side.
Step 3
Re-borrow the new room and invest it
Draw the newly available HELOC room and invest it in a non-registered account — one expected to produce income. This is the step that makes the interest deductible: borrowed money used to earn investment income.
Step 4
Deduct the interest, repeat
The HELOC interest is claimed on line 22100 of your tax return. Many people use the tax savings to prepay the mortgage, which creates more room faster. Over years, non-deductible mortgage debt converts into deductible investment debt.
The tax rules that make it work
The deduction rests on paragraph 20(1)(c) of the Income Tax Act: interest is deductible when borrowed money is used for the purpose of earning income from a business or property. Courts from Ludco to Singleton have confirmed it is the use of the borrowed money — not what secures the loan — that matters. A HELOC secured by your home still qualifies if the drawn funds buy income-producing investments.
The CRA applies a direct-use tracing test (Folio S3-F6-C1). Each draw is its own loan for tax purposes: keep records of when you drew, how much, what it bought, and where any distributions went. Commingling borrowed money with personal cash, or redirecting proceeds to personal spending, can taint deductibility.
Tracking it with Apis Financial
The HELOC investing tracker in Apis Financial is built around the records this strategy demands: your readvanceable mortgage and HELOC as a linked pair, room created as principal is repaid, every draw as a separate traceable tranche, deductible interest totals for line 22100, and the investment performance behind the borrowed money. The tracker is free — every draw, tranche and tax record. Only AI statement reading is Pro ($10/year).
Start freeCommon questions
Is mortgage interest tax-deductible in Canada?
Interest on your principal-residence mortgage is not deductible. But interest on borrowed money used to earn income from a business or investment generally is deductible under paragraph 20(1)(c) of the Income Tax Act. The Smith Manoeuvre is a systematic way to shift borrowing from the non-deductible category to the deductible one.
What does the CRA require for the interest to stay deductible?
Tracing: you must be able to show the borrowed money was used for an eligible purpose, and keep it that way. CRA Folio S3-F6-C1 sets out the direct-use test — if borrowed funds are mixed with personal money or the investments are sold and the proceeds spent personally, deductibility can be lost. Keep per-draw records.
Can I invest the borrowed money in my TFSA or RRSP?
You can, but the interest won't be deductible — registered accounts don't produce the taxable investment income the deduction requires. The strategy is built around non-registered investing.
What are the risks?
Leverage magnifies losses as well as gains — you're investing with borrowed money secured against your home. Rising HELOC rates increase carrying costs, and if investments are sold at a loss or the money's use changes, the interest deduction can be challenged. This is not a set-and-forget strategy.
Information only. This guide is for general information and is not financial, investment or tax advice. Tax rules are complex and individual circumstances vary — verify everything yourself and consider a qualified professional before acting. “Smith Manoeuvre” is a trademark of Smith Consulting Group Ltd.; this page refers to the strategy descriptively and is not affiliated with or endorsed by the trademark owner.