Interest-Tracing Hygiene
Section titled “Interest-Tracing Hygiene”Objective — protect a deduction the borrower already has, by keeping borrowed money demonstrably traceable to income-producing property.
Risk level — -1 — Negative risk.
Risk justification — no new debt, no new exposure; the borrower avoids losing something already held. Note the reversibility: low axis — a broken trace is often not repairable after the fact, which is why this is a maintenance discipline rather than a one-time action.
Benefit justification — unverified — needs Talbot.
Jurisdiction — Canada.
Prerequisites
Section titled “Prerequisites”- Existing deductible investment debt.
Mechanism
Section titled “Mechanism”CRA’s deductibility test under ITA §20(1)(c) turns on what the borrowed money was used for. Three disciplines preserve that:
- Strict tracing — borrowed proceeds flow directly into the investment account. Co-mingling with personal spending is fatal.
- Separate accounts — draws and investments segregated, so the trail is legible without reconstruction.
- Return-of-capital (ROC) discipline — where investments pay ROC (common in monthly-distribution funds), the ROC must be reinvested or applied to the loan balance. Spending it personally erodes deductibility.
Benefits
Section titled “Benefits”Preserves the after-tax arithmetic every leveraged strategy depends on. If the deduction is lost, a 7% loan costs 7%, not 3.25% (canada-investment-taxation.md §9.2) — the strategy’s entire margin disappears while the debt remains.
None. This is loss prevention.
Failure modes
Section titled “Failure modes”- The Van Steenis trap. In Van Steenis (2018 TCC), return of capital used for personal purposes triggered partial denial of the interest deduction. This is the named case, not a hypothetical.
- Drawing a HELOC into a chequing account that also receives salary, then investing from it — the trace is gone.
- Holding purely growth-oriented positions with no reasonable expectation of income, weakening the purpose test.
- Losing documentation across a lender change — see better-rates-investment-loan and better-rates-heloc.
Administrative only.
Tax considerations
Section titled “Tax considerations”The whole record. Authorities: ITA §20(1)(c); CRA Folio S3-F6-C1; Singleton (direct use governs); Ludco (income expectation suffices); Van Steenis (ROC misuse denies interest).
Who it may suit
Section titled “Who it may suit”Every holder of deductible investment debt — mandatory maintenance, not an optional optimization. It matters most in a Smith Manoeuvre, whose entire benefit rests on the trace.
Who should avoid it
Section titled “Who should avoid it”Nobody.
Implementation outline
Section titled “Implementation outline”- Open a dedicated investment account fed only by loan proceeds.
- Never route borrowed money through a personal chequing account.
- Check whether holdings distribute ROC; if so, reinvest it or apply it to the loan.
- Keep statements showing draw → investment purchase, indefinitely.
Evidence status
Section titled “Evidence status”external-sourced — CRA Folio S3-F6-C1 and the named cases, via Core/_WorkingOn/Research/canada-investment-taxation.md §6.7 (CRA compliance requirements) and the Smith Manoeuvre literature.
Counterarguments
Section titled “Counterarguments”- Over-cautious: CRA rarely audits this.
unverified — needs Talbot— no audit-frequency evidence is held, and Van Steenis shows the downside is real when it happens.
Variants
Section titled “Variants”None.
The Market Drop Wins fold-in — decided 2026-09-22
Section titled “The Market Drop Wins fold-in — decided 2026-09-22”Market Drop Wins’ T3-6 Interest deductibility optimization splits across this record and claim-investment-interest-deduction; the mapping is held once, there. No new record is created. Its contribution here is a single clause — “tracing rules are unforgiving” — which this record already establishes in far more detail from CRA Folio S3-F6-C1 and the named cases.
One thing does change in practice. The decline-deployed leverage records added in this batch (post-decline-deployment, non-callable-first, standby-credit-capacity) all draw borrowed funds at a moment of urgency, which is exactly when tracing discipline lapses. Document the trace at the moment of the draw, not at filing.
Source: market-drop-wins-library-v2 T3-6.
Related strategies
Section titled “Related strategies”smith-manoeuvre · claim-investment-interest-deduction · disappearing-source-continuation · cash-damming · debt-swap
Sources
Section titled “Sources”Core/_WorkingOn/Research/canada-investment-taxation.md§6.7 — CRA requirements for compliance; the ROC trap and Van Steenis- CRA Income Tax Folio S3-F6-C1 — tracing rules and eligible investments
Core/_WorkingOn/Research/LevPublications/Leverage-Publications-Summaries.md— Robinson Smith, Master Your Mortgage for Financial Freedom: ROC distributions can jeopardize deductibility
Open questions
Section titled “Open questions”- Whether SDC should ship a tracing-documentation template as an advisor tool. Routes to Offerings.