Change in Use of Property in 2026: The Deemed Disposition Rules Explained

You bought a home and later turned it into a rental.
Or you owned a rental property and moved into it.
Or your cottage became an Airbnb.

Many Canadians assume:

“I didn’t sell it — so there’s no tax.”

Under Canadian tax law, that assumption can be wrong.

When there is a change in use of property, the Income Tax Act may deem you to have disposed of — and reacquired — the property at fair market value.

This rule is found in Income Tax Act (ITA) s.45(1).

It is one of the most misunderstood real estate provisions in Canada.

Let us examine it clearly.

 

What Is a “Change in Use”?

A change in use generally occurs when property shifts between:

• Personal use → Income-producing use
• Income-producing use → Personal use

Examples include:

• Converting your principal residence into a rental property
• Moving into a former rental property
• Converting a long-term rental into short-term commercial rental
• Beginning to use part of your home for business purposes

If the primary character of use changes, s.45(1) may apply.

 

The Deemed Disposition Rule (ITA s.45(1))

Under s.45(1):

You are deemed to have:

1. Disposed of the property at fair market value (FMV) at the time of change in use, and
2. Immediately reacquired it at that same FMV.

This triggers:

• A capital gain (if FMV exceeds adjusted cost base), or
• A capital loss (if FMV is lower).

Even though you did not sell the property.

Tax can arise without cash proceeds.

 

Example: Principal Residence to Rental

You purchased a home for $500,000.

At the time you convert it to a rental, its FMV is $800,000.

Deemed capital gain: $300,000.

You may be able to shelter this gain using the Principal Residence Exemption, depending on the years designated.

But the deemed disposition still occurs.

Your new adjusted cost base becomes $800,000 going forward.

 

Example: Rental to Personal Residence

You purchased a rental for $400,000.

At the time you move into it, its FMV is $650,000.

Deemed capital gain: $250,000.

Tax is triggered at the time of conversion.

Future principal residence exemption applies only from the date of conversion forward.

 

What If the Property Decreases in Value?

If FMV is lower than your cost:

A deemed capital loss may arise.

However:

Capital losses on personal-use property are generally denied.

Therefore, converting rental property to personal use in a down market may create denied losses.

Planning is critical.

 

The Section 45(2) and 45(3) Elections

The Act provides relief elections that may defer the deemed disposition:

• s.45(2) – When converting principal residence to rental
• s.45(3) – When converting rental to principal residence

These elections allow you to:

• Defer recognition of the gain
• Potentially continue to designate the property as a principal residence (subject to conditions)

However:

These elections must be filed properly and on time.

Failure to elect may result in unintended tax.

 

Interaction With the Principal Residence Exemption

The principal residence exemption under s.40(2)(b) may shelter gains accrued during personal-use years.

But once the property becomes income-producing:

Future appreciation may be taxable.

Proper designation strategy is essential, particularly for families owning:

• Multiple properties
• Cottages
• Rental portfolios

 

Partial Change in Use

If only part of the property changes use (e.g., basement rental):

The deemed disposition rules may apply proportionally.

However, if:

• The income-producing use is ancillary, and
• No structural changes are made, and
• No CCA is claimed

CRA may accept that no change in use occurred.

Claiming CCA often eliminates principal residence protection.

 

Claiming Capital Cost Allowance (CCA)

If you convert your home to a rental and claim CCA:

You may:

• Trigger recapture on sale
• Jeopardize principal residence exemption
• Accelerate taxable income

CCA decisions must be strategic.

 

Interaction With Family-Owned Enterprises

Where property is held through:

• A corporation
• A family trust
• A holding company

Change-in-use rules still apply at the entity level.

Corporate-level deemed dispositions may produce:

• Taxable capital gains
• Reflected increases in asset base
• Impact on estate planning structures

Integrated planning is required.

 

Common Misunderstandings

“I didn’t sell it, so no tax applies.”
Deemed dispositions can trigger tax without sale.

“Moving back into a rental avoids tax.”
A deemed gain may arise on conversion.

“I can just ignore the change.”
CRA may reassess if reporting is omitted.

“CCA has no downside.”
CCA can create recapture and exemption issues.

 

Strategic Planning for 2026

Before changing use of property:

• Obtain professional FMV appraisal
• Calculate accrued gain
• Review principal residence history
• Evaluate election under s.45(2) or s.45(3)
• Model future sale consequences

Timing and documentation matter.

 

Final Thoughts

Under ITA s.45(1), a change in use of property may trigger a deemed disposition at fair market value.

Tax can arise without an actual sale.

Elections may defer recognition — but only if properly filed.

For families building wealth through real estate, property decisions must be evaluated not only economically, but statutorily.

Because tax law does not wait for a closing date.

At Shajani CPA, we integrate real estate planning, principal residence strategy, and generational wealth design with precision.

Tell us your ambitions, and we will guide you there.

This information is for discussion purposes only and should not be considered professional advice. There is no guarantee or warrant of information on this site and it should be noted that rules and laws change regularly. You should consult a professional before considering implementing or taking any action based on information on this site. Call our team for a consultation before taking any action. ©2026 Shajani CPA.

Shajani CPA is a CPA Calgary, Edmonton and Red Deer firm and provides Accountant, Bookkeeping, Tax Advice and Tax Planning service.