The average Ontario landlord with one rental property has $8,000–$15,000 in legitimate deductible expenses each year. Most don't claim all of them — not because they're ineligible, but because they didn't track them.
The CRA allows landlords to deduct any reasonable expense incurred to earn rental income. Miss those deductions and you're paying income tax on money you legally didn't need to. At Ontario's combined marginal rates — which hit over 53% at higher incomes — every $1,000 in unclaimed deductions can cost you $400–$530 in unnecessary tax.
This post is a practical breakdown of every major deduction available, the CRA's repair-vs-improvement line, what you can't deduct, and the record-keeping habits that protect you in an audit. This is not tax advice — consult a qualified accountant for your specific situation — but it will give you a solid foundation and the right questions to bring to that conversation.
How Ontario Landlords Are Taxed on Rental Income
Rental income is reported on your personal tax return (T1) using Form T776 (Statement of Real Estate Rentals). Net rental income — after all eligible expenses — is added to your other income and taxed at your marginal rate.
Ontario landlords pay both federal and Ontario provincial income tax on net rental income. The combined marginal rates range from roughly 20% at low income levels to over 53% at the top bracket. For a landlord in the $100,000–$150,000 income range, the combined marginal rate is approximately 43–48%. That makes every legitimate deduction genuinely worth pursuing.
If you own the rental property jointly — with a spouse or business partner — each co-owner reports their proportionate share of income and expenses on their own T776.
What You Can Deduct: The Full List
Mortgage Interest (Not Principal)
This is almost always the largest single deduction. You can deduct the interest portion of your mortgage payments — not the principal repayment. Your lender provides an annual mortgage interest statement; request it if it isn't sent automatically.
If you refinanced and used a portion of the proceeds for personal purposes, you can only deduct the interest attributable to the rental property portion. Document what the funds were used for at the time of refinancing.
Property Taxes
Your annual municipal property tax bill is fully deductible. In London, St. Thomas, and Strathroy, taxes are paid in installments — deduct the total amount actually paid within the tax year. Keep your tax bills and proof of payment.
Insurance Premiums
Landlord insurance (also called rental property insurance or dwelling fire insurance) is deductible in full. Standard homeowner's insurance doesn't cover rental properties — you need a dedicated landlord policy regardless of the tax benefit. See our rental property insurance guide for what coverage Ontario landlords actually need and what it typically costs.
Repairs and Maintenance
Expenses to keep the property in its existing condition are deductible in the year paid. Common examples:
- Plumbing repairs (not full replumbing)
- Roof repairs — patching, flashing, fixing leaks (not full replacement)
- Appliance repairs
- Repainting walls or exterior
- Pest control treatments
- Cleaning costs between tenancies
- Driveway patching and minor concrete repairs
- Window caulking and weatherstripping
The line the CRA draws is repair vs. improvement. See the dedicated section below — this is the area that most commonly triggers audit questions.
Property Management Fees
If you hire a property manager, every fee they charge is deductible: monthly management fees, tenant placement fees, lease renewal fees, and any other services invoiced. For landlords using Prospera Properties, those fees come off your rental income directly — reducing your taxable net. Learn more about what property management fees in Ontario typically look like and how to evaluate whether they're worth it.
Advertising Costs
Any paid advertising to find tenants is deductible: listing fees on Kijiji, rental platforms, signage, photography, or marketing services. Free posts cost nothing to deduct either — but document any paid placements.
Professional Fees
Legal fees related to the rental property are deductible. This includes:
- Drafting or reviewing lease agreements
- LTB application fees and representation costs
- Legal fees to collect unpaid rent or enforce a judgment
- Accountant or bookkeeper fees specifically for T776 preparation and rental reporting
Note: Legal fees paid when purchasing the property are not deductible as a current expense — they're added to your adjusted cost base (ACB).
Utilities Paid by the Landlord
If heat, hydro, water, or other utilities are in your name and you pay them as part of the rental arrangement, those costs are deductible. If utilities are in the tenant's name and they pay directly, you neither claim the income nor deduct the expense. See our utilities guide for Ontario rentals for how landlords and tenants typically split utility responsibilities.
Home Office Expenses
If you use a dedicated space in your home exclusively to manage your rental property — maintaining records, handling correspondence, processing rent — you may deduct a proportionate share of your home costs (mortgage interest or rent, utilities, internet). The CRA is strict about "exclusively and regularly" — a kitchen table used for both personal and landlord tasks doesn't qualify.
Travel and Mileage
Travel to and from the rental property for legitimate purposes — maintenance visits, inspections, tenant meetings, contractor oversight — is deductible at the CRA's prescribed per-kilometre rate (58 cents/km for the first 5,000 km in 2025; verify the current year rate at canada.ca). Keep a mileage log with dates, destinations, and purposes.
Interest on Other Loans
If you borrowed money specifically to repair or improve the rental property, the interest on that loan is deductible. Keep documentation linking the loan proceeds to the rental property.
Repair vs. Capital Improvement: The Line That Matters
This is the single most common area of confusion — and the most common trigger for CRA review.
Deductible repair: Restores the property to its previous working condition. Deductible in full in the year paid.
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Capital improvement: Adds value, significantly extends the useful life, or upgrades to something better than what was there before. Must be added to the property's adjusted cost base or depreciated using CCA — not deducted immediately.
| Repair (Deductible Now) | Improvement (Capitalize) |
|---|---|
| Patching a roof leak | Full roof replacement |
| Repairing a broken furnace | Replacing furnace with new high-efficiency unit |
| Fixing a cracked window | Installing all-new windows throughout |
| Repainting existing walls | Adding a room or converting a space |
| Repairing existing plumbing | Upgrading entire plumbing system |
| Replacing a broken appliance in kind | Adding a dishwasher where none existed |
When a project is mixed — part repair, part improvement — the CRA expects you to split the costs and treat each portion appropriately.
Capital Cost Allowance (CCA): Use With Caution
CCA is the CRA's depreciation system. It lets you deduct a portion of the cost of the property and major improvements over time (Class 1 for most residential buildings: 4% declining balance).
On paper, CCA looks attractive. In practice, there's a catch most landlords don't anticipate: recapture. When you sell the property, all the CCA you've claimed over the years gets added back to your income in the year of sale — at your marginal rate, in what could be a high-income year. That tax hit often wipes out the benefit of the earlier deductions.
Two other restrictions:
- CCA cannot create or increase a rental loss. It can only reduce net rental income to zero. If your other expenses already exceed income, CCA adds no benefit.
- The half-year rule applies in the year of acquisition — you can only claim half the normal CCA in the first year you own the property.
Consult your accountant before claiming CCA. For most landlords with one or two properties, it creates complexity without meaningful benefit. For landlords thinking about an eventual sale, see our capital gains on rental property guide for how CCA interacts with the sale.
What You Cannot Deduct
Be clear on these — claiming them is what attracts CRA attention:
- Principal mortgage repayments — only the interest portion is deductible
- Land transfer tax paid at purchase — added to your ACB, not a current deduction
- Legal and accounting fees paid at time of purchase — same, added to ACB
- Personal portion of any shared expense — if you live in one unit and rent another, apportion every shared expense carefully
- Expenses for periods the property was vacant and not listed for rent — if you pulled it off the market, you can't deduct ongoing expenses for that period
- Mortgage principal or any capital repayment
- Personal renovation work unrelated to the rental unit
- Fines or penalties (e.g., bylaw fines)
Keeping Records That Survive a CRA Audit
The CRA can reassess rental property claims up to 4 years back under normal circumstances, and 6 years in cases of carelessness or suspected misrepresentation. For capital improvements that affect your ACB, you need records until the property is sold — potentially decades.
What to keep:
- All receipts, invoices, and statements (digital copies are fine)
- Bank and credit card statements showing rental-related transactions
- Annual mortgage interest statements from your lender
- Municipal property tax bills and proof of payment
- Insurance invoices and renewal documents
- Contractor invoices specifying the exact work performed and address
- Mileage logs with dates, km, and purpose
- Any loan documents for rental-related borrowing
- Advertising invoices or platform receipts
- Management fee statements or invoices
A simple spreadsheet works well for landlords with one or two properties. As you grow, dedicated landlord accounting software or a bookkeeper will save significant time at year-end. Our landlord record-keeping guide covers exactly how to organize documentation for both tax purposes and any LTB proceedings.
Part-Year Rentals: How to Prorate
If the property was available to rent for only part of the year — vacant between tenants, renovated, or occupied by a family member for a period — you can only deduct expenses for the portion of the year it was genuinely available to rent.
The standard approach is to prorate by days: if the unit was available 240 of 365 days, you can claim 65.8% of annual fixed costs (property tax, insurance, mortgage interest). Variable costs like repairs and advertising that were directly incurred during the rental period are fully deductible in the normal way.
Tax Season Starts in January, Not April
The landlords who consistently get their deductions right are the ones tracking expenses throughout the year — not reconstructing receipts from memory the week before their accountant appointment.
Set up a dedicated folder (physical or cloud) for each property. Drop receipts in as you spend. Reconcile monthly against your bank statement. If that feels like too much administration, it's a strong signal that professional property management — which includes monthly financial reporting — is worth the cost.
Frequently Asked Questions
Q: Can I deduct expenses from before my rental property had a tenant? A: Yes, within limits. Pre-rental expenses incurred while genuinely preparing the property to rent — advertising, necessary repairs, insurance — are generally deductible. However, you need to demonstrate a clear intention to rent and that the expenses were incurred for that purpose. Expenses for an extended period where you made no real effort to find tenants are harder to justify to the CRA.
Q: I hired my family member to do repairs on my rental property. Can I deduct what I paid them? A: Yes, if you paid a fair market rate for the work and have documentation — invoices, proof of payment, and a description of work done. The CRA will compare the amount to what an arm's-length contractor would charge. Paying a family member $2,000 for a job that would cost $500 on the open market invites scrutiny.
Q: Can I deduct a home equity line of credit (HELOC) I used to fund rental property repairs? A: Yes — the interest portion on the amount of the HELOC you used for rental property purposes is deductible. If you also used the HELOC for personal spending, you must apportion the interest and only deduct the rental-related share. Keep documentation showing how the funds were used when you drew them.
Q: What happens to my deductions if I move into the rental property? A: From the date you begin personally occupying the unit, you can no longer deduct expenses for that portion. If you convert the entire property from rental to personal use, all deductions stop. There's also a deemed disposition rule that can trigger capital gains at the time of conversion — speak with your accountant before making this change.
Q: Are renovation costs to make my rental more energy-efficient deductible? A: Energy-efficiency upgrades — better insulation, a new high-efficiency furnace, heat pump installation — are generally capital improvements, not repairs, and must be capitalized rather than deducted immediately. However, various federal and provincial grant and rebate programs exist for these upgrades; a knowledgeable accountant can help you identify which costs are eligible for current deductions versus which must be added to your ACB.
Q: Can I deduct the cost of a property management course or landlord education? A: Possibly. Education costs directly related to managing your existing rental properties may be deductible as a business expense. Courses taken before you owned a rental property — in anticipation of eventually investing — are less likely to be accepted. Document the connection between the course content and your active rental activities.
Whether you manage your own properties or work with a management company, consistent financial records are the habit that pays off every tax season. Prospera Properties provides monthly income and expense statements for all managed properties, which makes T776 preparation significantly simpler for our clients.
If you're a landlord in London, St. Thomas, or Strathroy — or considering hiring professional management to reduce your workload — contact Prospera Properties to learn how we can help you run a more profitable, better-documented rental operation.