Ontario Property Capital Gains Calculator

How capital gains tax on property is calculated

Canada does not tax the sale price. It taxes the gain, and only half of it is added to your income. The same federal rules apply in every province, and Ontario adds its own income tax on top through your marginal rate.

1. 1

   Start with the sale price and subtract selling costs

   Commission, the HST (13%) on it, legal fees, the mortgage discharge and similar costs come off the sale price. On a $1,000,000 sale at 5% commission that is $59,000 with the other costs in the example.

2. 2

   Subtract your cost base

   The price you paid plus the Ontario land transfer tax (and Toronto's municipal tax), legal fees and renovations that added value. Using $550,000 plus $40,000 gives $590,000.

3. 3

   The result is the capital gain

   $1,000,000 − $59,000 − $590,000 = $351,000.

4. 4

   Take off the principal residence exemption, if it applies

   For a home you lived in, the exempt share is (1 + years named) ÷ years owned, capped at all of the gain. A rental or investment property has no exemption.

5. 5

   Add 50% of what is left to your income

   On the example rental, half of $351,000 is $175,500, added to the rest of your income that year.

6. 6

   Tax it at your marginal rate

   At 53.53%, the top Ontario rate, that is about $93,945. Each percentage point of marginal rate is worth about $1,755 on this example.

The tax is not a separate line. The included half is simply income, and the final tax comes from your return after credits and any other income. The marginal rate in the calculator is an input because it depends on your whole year.

The principal residence exemption, with numbers

The same Ontario property ($351,000 gain, 10 years owned) is taxed very differently depending on how it was used.

Illustrative. The flipping row uses the same sale and cost figures, but an owner in a year-one sale would normally have had less time to build a gain.

The extra “+1” in the formula exists so that someone who sells one principal residence and buys another in the same year is not left with a taxable year. The exemption also covers the land under the house up to half a hectare, and more if it is needed for the use and enjoyment of the home.

How to reduce or avoid capital gains tax on a Ontario property

These are legitimate ways to pay less, and they work in every province. None replaces advice from an accountant who has your whole return, and none works if it is done after the fact.

1. 1

   Name the property your principal residence, and report the sale

   If you lived in the home, the exemption can cover all or most of the gain. Since 2016 the sale has to be reported on your return in the year you sell, with the designation on Schedule 3 and form T2091(IND). Forgetting costs you the exemption and can bring a late-filing penalty of up to $8,000, and CRA can reassess an unreported sale outside the usual window.

2. 2

   Pick the right property if you own two

   A family can name only one property as its principal residence for each year. If you own a house and a cottage, work out the gain per year of ownership on each. Naming the one that gained more per year usually saves the most tax; the (1 + years) ÷ years owned formula gives the extra year to both.

3. 3

   Build up your cost base

   Everything that raises what the property cost reduces the gain: purchase taxes, legal fees, and renovations that added lasting value, plus selling costs such as commission, its sales tax, legal fees and the mortgage discharge. Repairs and maintenance do not count. Records are the difference between claiming these and guessing.

4. 4

   Split the gain with a spouse or partner

   If the property is owned jointly, each owner reports their share. Two people in lower brackets can pay less than one person in the top bracket, but only if the ownership was genuine from the start. Putting a spouse on title just before a sale invites the attribution rules.

5. 5

   Choose the tax year

   The gain is added to income in the year of sale, not the year you signed. A year with lower income, a leave, or large RRSP contributions can reduce the bracket the gain falls in. The closing date, not the offer date, decides the year.

6. 6

   Use capital losses

   A net capital loss on stocks or another property can be applied against this year's taxable gain, carried back three years or carried forward without limit. A loss on a home you lived in is personal-use and is not deductible.

7. 7

   Spread the gain with a reserve

   If you will not receive all of the sale price at once, such as with a vendor take-back mortgage, you can claim a reserve and bring the gain in over up to five years, with at least one-fifth included each year. Talk to an accountant before agreeing to the terms.

8. 8

   Handle a rental that became your home (or the reverse)

   Changing a property between personal and rental use is a deemed sale at fair market value unless you file an election. An election under subsection 45(2) or 45(3) can defer the deemed sale, and a rental can sometimes still be named your principal residence for up to four years. Claiming capital cost allowance on a rental can cost you the exemption on that part, so decide before you claim it.

When the exemption does not help

1. 1

   Rentals and investment properties

   A house you never lived in has no exemption. Half the gain is added to income at your marginal rate. Depreciation (capital cost allowance) you claimed earlier is also added back to income on sale as recapture.

2. 2

   Sold within 365 days (the flipping rule)

   A residential property sold less than 365 days after it was bought is treated as business income, with no exemption and no 50% discount. The exceptions are life events: a death, a disability or illness, a new household member, a separation, a job move at least 40 km closer, insolvency, an involuntary disposition and threats to personal safety.

3. 3

   Pre-construction assignments

   Selling your contract before closing is usually taxed as business income, not as a capital gain, and the principal residence exemption does not apply.

4. 4

   Non-residents

   When a non-resident sells Canadian real estate, the buyer's lawyer must withhold up to 25% of the sale price unless a Section 116 clearance certificate is obtained through form T2062. It is a deposit against the tax, not the tax itself.

Ontario: what is specific here

Ontario sellers, especially in the GTA, tend to have the biggest gains in the country on paper, which makes the principal residence designation worth the most here. The 13% HST on the listing commission is a selling cost, so it reduces the gain, and the land transfer tax you paid when you bought is added to your cost base.

Top capital gains rates across Canada

Ontario ranks 3 of 10 for the highest combined rate (1 is highest). The top rate on a capital gain is half the top rate on ordinary income. Most sellers pay less than the top rate, because the added income only reaches the top bracket above the provincial threshold.

Combined federal and provincial rates for 2026 from Richter. The territories are not shown.

Frequently asked questions

Sources

• Canada Revenue Agency: Principal residence and other real estate
• Canada Revenue Agency: Line 12700, capital gains
• Richter: 2026 combined top personal tax rates

Figures checked November 2026. Tax rules and rates change; confirm with the CRA or an accountant before you file.