Selling a Home in Ontario: What You Need to Know About Taxes & Capital Gains

1. The Big Question: Is Your Sale Taxable?

Primary Residence = Usually Tax-Free

If the property you’re selling is your principal residence, you’re generally exempt from paying capital gains tax thanks to the Principal Residence Exemption (PRE).

To qualify:

You (or your family) lived in the home
You designate it as your principal residence for the years you owned it
You report the sale to the Canada Revenue Agency

Bottom line:
Most homeowners in London selling their primary home pay $0 in capital gains tax.

Investment or Secondary Property = Taxable

If the property is:

A rental
A flip
A cottage (not designated as your principal residence)

Then capital gains tax does apply.

2. How Capital Gains Tax Works (Simple Version)

Capital gain =
Sale Price – Purchase Price – Costs

Costs can include:

Legal fees
Realtor commissions
Renovations (capital improvements)

Only 50% of the gain is taxable in Canada.

Example:

Bought for $400,000
Sold for $600,000
Gain = $200,000
Taxable portion = $100,000
That $100K gets added to your income and taxed at your marginal rate

3. London Market Reality: Why This Matters

In a market like London, where prices have seen strong growth over the past decade:

Many investors are sitting on large unrealized gains
Even small duplexes or student rentals near Western University have appreciated significantly
A sale without planning can trigger a surprise tax bill in the tens of thousands

This is where strategy matters—not just timing.

4. Common Scenarios (and Mistakes)

Scenario 1: “I lived there for a bit, so I’m good”

Not always. You may still owe partial tax depending on how long it was rented.

Scenario 2: “I’ll just flip it quickly”

Frequent flips can be treated as business income, not capital gains—meaning 100% taxable, not 50%.

Scenario 3: “I didn’t know I had to report it”

Even if it’s tax-free under PRE, you still must report the sale to the CRA.

5. Smart Moves Before You Sell

If you’re selling in Ontario, do this before listing:

Confirm your property designation (principal vs investment)
Estimate your gain early
Track your improvements (they reduce taxable gain)
Talk to an accountant before you sell—not after

6. Timing & Strategy Can Save You Money

Sometimes it makes sense to:

Sell in a lower-income year
Offset gains with losses
Delay or accelerate a sale based on your income

This is where a coordinated plan between your Realtor and accountant actually matters.

7. Final Take

Selling a home isn’t just about price, it’s about what you keep after the sale.

Primary residence? You’re likely tax-free
Investment property? Plan ahead or pay the price
Flipping? Be careful—it may not be capital gains at all

If you’re unsure where you stand, it’s worth running the numbers before making a move. A quick calculation upfront can save you a lot later.