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Renting a Room in Your Home in Ontario: RTA and Tax Rules

Renting a room in your Ontario home? Learn when the Residential Tenancies Act applies, what changes if it does, and which rental expenses you can deduct.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • The Residential Tenancies Act covers most rental units, but it does not apply if the tenant must share a kitchen or bathroom with the owner or the owner's family.
  • If the Act applies, you must follow rules on entry, vital services, the lease, deposits and rent increases.
  • For tax, the CRA encourages you to report rental income and expenses on Form T776, though it also accepts other financial statements, and you can claim only the expenses for the rented area.

Renting a room in the home you live in can help with the mortgage and bills. It also raises two questions. Does Ontario's tenancy law apply to your arrangement, and how do you report the income and costs on your taxes?

This article covers both. The answers depend on the details, such as who uses the kitchen and bathroom and whether you rent to a relative. A lawyer or accountant can confirm how the rules apply to you.

When the Residential Tenancies Act applies

Under the Residential Tenancies Act, 2006 (RTA), landlords and tenants of most rental units are covered by most of its rules. Rental units include apartments, houses, and rooms in rooming or boarding houses.

There is an important exception for home sharing. The RTA does not apply if the tenant must share a kitchen or bathroom with the owner or with the owner's family members. If your tenant has their own kitchen and bathroom, or shares them only with other tenants, the exception may not fit and the RTA may apply.

The RTA has other exemptions too. Check the exact wording of section 5 of the RTA on e-Laws, or ask a lawyer, before you rely on an exemption.

What changes if the RTA applies

The Ontario Government sets the rent increase guideline each year.

Reporting your rental income

The CRA encourages landlords to report rental income and expenses on Form T776, Statement of Real Estate Rentals, although it also accepts other financial statements. Rental properties have a December 31 year-end, so you report income for the calendar year, January 1 to December 31.

Claiming expenses for part of your home

When you rent part of your own home, you can claim only the expenses for the rented area. Shared costs such as property taxes and insurance are split by floor area or by number of rooms.

Type of costGeneral treatment
Current expenses (recurring, short-term benefit)Usually deducted in the year incurred
Capital expenses (benefit over several years)Generally recovered over time through capital cost allowance (CCA)
Minor repairs and maintenance (not your own labour)Labour and materials deductible, but not the value of your own labour
Interest on money borrowed to buy or improveDeductible

CCA cannot be used to create or increase a rental loss. Land is not depreciable, so CCA can be claimed on the building but not on the land.

If you rent to a relative below market rent and expenses keep exceeding the rent, the CRA treats it as a cost-sharing arrangement and no rental loss can be claimed.

What to do next

For free help, the Landlord Self-Help Centre (for small landlords) and the Advocacy Centre for Tenants Ontario (for tenants) are funded by Legal Aid Ontario.

Frequently asked questions

Does the RTA apply if my tenant shares my kitchen?

Generally not. The RTA does not apply if the tenant must share a kitchen or bathroom with the owner or the owner's family members. Confirm the details of your setup with a lawyer.

Can I ask for a damage deposit on a room?

If the RTA applies, a rent deposit can only be used for the last month's (or week's) rent. It cannot exceed one month's rent where rent is paid monthly.

Can I deduct the value of my own work fixing the room?

No, you cannot deduct the value of your own labour, although labour and materials for minor repairs and maintenance are deductible. Your actual material costs may be deductible.

Can I claim my whole mortgage interest and property tax?

No. Only the expenses for the rented area can be claimed, and shared costs such as property taxes and insurance are split by floor area or by number of rooms.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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