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Closing Cost Calculator Ontario: What Your Estimate Leaves Out

Used an online closing cost calculator? Learn what Ontario estimates usually cover, what they leave out, and how to build a realistic closing budget.

Real Estate5 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • Most online calculators are built around land transfer tax, which is paid through your lawyer on closing.
  • Ontario's provincial land transfer tax is tiered, and a first-time buyer refund of up to $4,000 may reduce it if you qualify.
  • Adjustments, title insurance, condo status certificates, registry fees and your lawyer's HST are often missing from a quick estimate.
  • A buyer's budget and a seller's budget are different, because only the buyer pays land transfer tax.

You typed a purchase price into a closing cost calculator and got a number. It looked manageable, but you suspect it is not the whole story. That instinct is usually right. Calculators are good at the parts that follow a formula and weak on the parts that depend on your particular deal.

This article explains what a typical Ontario estimate covers, what tends to be left out, and how to turn a rough figure into a working budget. It is general information, not advice on your file, so use it to ask better questions of your lawyer.

What most calculators actually cover

The core of almost every Ontario closing cost calculator is land transfer tax. In Ontario, the person who tenders the conveyance for registration pays the tax on the value of the consideration, and it is payable when the conveyance is tendered or before, which means on closing through the buyer's lawyer.

The provincial rates for agreements after November 14, 2016 are 0.5% up to $55,000, 1.0% from $55,000 to $250,000, 1.5% from $250,000 to $400,000 and 2.0% above $400,000, plus 2.5% on the portion above $2,000,000 where the land has one or two single-family residences. To estimate your own provincial tax, apply each rate to the part of your price that falls in that band and add the results; your lawyer can confirm the exact figure.

Many calculators also show the first-time buyer refund. It is a maximum of $4,000, and it applies to a buyer who is 18 or older, will occupy the home as a principal residence within nine months, has never owned an eligible home anywhere in the world, and is a Canadian citizen or permanent resident for agreements after November 14, 2016. A spouse's past ownership counts against you while you are married. The claim must be made within 18 months of registration.

What a quick estimate often leaves out

The items below vary by property and by deal, which is why a simple calculator often skips them or uses a placeholder. Ask your lawyer for each one.

Also remember that a calculator usually cannot know about moving costs, new locks, utility set-up, or repairs you plan to make right away. These are real cash needs even though they are not closing costs in the strict sense.

Buyer costs and seller costs are different

A common mistake is to use a buyer's calculator when you are selling. Land transfer tax is paid only by the buyer tendering the conveyance. A seller does not pay it on a sale. A seller's costs are instead commission, HST on commission, legal fees and disbursements, any mortgage payout or penalty, and adjustments.

CostBuyerSeller
Land transfer taxYesNo
Real estate commissionNot usuallyYes, plus HST
Legal fees and HSTYesYes
Mortgage payout or penaltyNot applicableIf there is a mortgage
Title insuranceCan be bought through a lawyer, title insurer or agentNot usually
AdjustmentsYes, either wayYes, either way

The seller's hidden number: the mortgage payout

Sellers often underestimate this line. Paying off an entire mortgage early, including because you sell the home, can trigger a prepayment penalty, and porting the mortgage is only an option if you are buying another home and your lender allows it.

A prepayment penalty is usually the higher of three months' interest on what you still owe or the interest rate differential. As an example, on $200,000 at 6% with 36 months left and a posted rate of 4%, three months' interest is $3,000 but the differential is $12,000, so the penalty would be $12,000, possibly plus an administration fee. Your own mortgage contract and lender set the actual figure, so request a payout statement early.

How to build a realistic budget

Once you have an offer in hand, send the agreement to your lawyer before you rely on any calculator. The lawyer can prepare a statement of adjustments and a closing estimate based on the real terms.

Frequently asked questions

Is land transfer tax included in a typical closing cost calculator?

Almost always, because it is the largest formula-driven item. It is paid by the buyer when the conveyance is tendered for registration, which in practice means on closing through the buyer's lawyer.

Do I pay HST on the purchase price of a resale home?

Sales of used owner-occupied homes by individuals are usually exempt from GST/HST, so no HST is charged on the price of a typical resale. HST at 13% can still apply to services like legal fees. Homes sold by builders are treated differently.

Does the first-time buyer refund reduce my cash needed on closing?

The rebate is a refund of up to $4,000, and the rules describe it as no provincial tax on the first $368,000 for an eligible home. How it affects your cash on closing is worth confirming with your lawyer. A claim must be made within 18 months of registration.

Why does my lawyer's estimate differ from the calculator?

The calculator uses general formulas. Your lawyer's number reflects your actual agreement, adjustments, property type and the disbursements for your file. Ask for a line-by-line breakdown so you can see where the gap comes from.

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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