Rental property deductions in Quebec for duplex, triplex, and plex owners

Quebec landlords can lower taxable rental income by claiming the right expenses and classifying renovations correctly. Here is how duplex, triplex, and plex owners in Montreal can stay compliant with Revenu Quebec and the CRA.

Core deductible operating expenses

• Property and school taxes
• Insurance (landlord/building)
• Utilities paid by the landlord (electricity, gas, water, internet if included)
• Repairs and maintenance (minor plumbing, electrical, cleaning, lock changes)
• Advertising and leasing costs
• Professional fees (accounting, legal, property management)
• Interest on mortgages/loans tied to the building
• Condo/HOA fees (include breakdown if it covers utilities or reserves)

Repairs vs capital improvements

• Repairs (expense now): fixing leaks, patching drywall, repainting a unit, replacing a broken fixture.
• Capital improvements (CCA): new roof, window upgrades, full kitchen/bath gut, heat pumps. These go to capital cost allowance classes.
• Keep invoices and before/after photos to justify classification.

Vehicle and travel

• Track mileage for trips to the property: date, purpose, km.
• Claim the reasonable portion tied to rental management; keep fuel/maintenance records if required.

Mixed-use and allocation

• If one unit is owner-occupied, allocate shared costs (roof, boiler, insurance) by square footage or a reasonable method.
• Document the allocation basis in case of audit.

Record-keeping best practices

• Separate bank/credit card for the building.
• Monthly reconciliation: rent roll vs bank deposits.
• Digital receipts attached to each expense line.
• Simple folders: YYYY-MM/building/ with leases, notices, invoices.

Common mistakes to avoid

• Claiming capital improvements as repairs (risk of denial).
• Charging GST/QST on long-term residential rent (usually exempt).
• Mixing personal and rental expenses in one account.
• Forgetting to track interest separately from principal.

When to involve a professional

• Major renovations or refinancing that affect CCA and interest tracking.
• Multi-use properties (commercial + residential).
• Need bilingual notices, rent increases, or monthly reporting. See our property management services.

FAQ

Can I deduct mortgage principal?

No, only interest is deductible, not principal.

Do I charge GST/QST on long-term rent?

No, long-term residential rent is exempt from GST/QST.

How do I treat a full kitchen renovation?

As a capital improvement; add to CCA. Keep invoices and photos.

What about condo reserve contributions?

Include them; keep the HOA breakdown. They may form part of capitalizable amounts depending on the work funded.

How often should I reconcile?

Monthly. Match rent roll to deposits and receipts to expenses.

CTA

If you own a duplex, triplex, or plex in Greater Montreal and want airtight deductions, clean ledgers, and rent-ready reporting, contact TaxCove for a personalized consultation. We pair property management with landlord-focused accounting so you stay compliant and profitable.

Important notice

This article provides general information only and does not constitute personalized tax advice. Rules can change and include exceptions; validate your situation with a professional or the tax authorities.