Estimate vs Quote in Canada: What’s Binding and How to Write Each

Short answer: An estimate is your best judgement of what a job will cost; a quote is a fixed price for a defined scope of work. Once the client accepts, either can become part of a binding contract, and the label doesn’t decide how much you can charge. For consumers, provincial law often does. In Ontario, a supplier can’t bill more than 10% above an estimate unless the consumer agrees in writing. In Quebec, renovation contractors and many repairers can’t invoice more than the agreed amount without the client’s authorization for the extra work. Give a quote when the scope is clear, and an estimate with stated assumptions and a change process when it isn’t.

This page is for contractors, trades and freelancers in Canada pricing work in 2026. The consumer rules come from each province’s own consumer protection office, and they apply mainly when your client is an individual rather than a business. For the layout of the document itself, use the Canadian quote template. Once the job is done, how to invoice in Canada takes over, and estimating software for contractors covers the tools.

What is the difference between an estimate and a quote?

An estimate says “about this much”, a quote says “exactly this much”, and the difference is how much risk you take on the price.

	Estimate	Quote
What it says	Your best judgement of the likely cost	A fixed price for a defined scope
Who carries the cost risk	Shared: the price can move within limits	You: if it takes longer, you absorb it
When to use it	Hidden conditions, unclear scope, repairs	Clear, measurable work
Typical wording	”Estimated cost”, “approximately”, “allowance"	"Fixed price”, “total price for the work described”
Can the final bill differ?	Yes, within the law and your terms	Only through agreed changes to the scope

In everyday speech people use the two words interchangeably, and clients often say “quote” for both. That is why the wording on the document matters more than its title.

Is a quote or an estimate legally binding in Canada?

An accepted quote is generally a contract for the price stated, and an accepted estimate can also become part of the contract, with consumer law limiting how far the final price can move.

Calling a document an estimate doesn’t free you to charge whatever the job ends up costing. Ontario’s business guide to consumer protection says a supplier can’t bill a consumer more than 10% above the estimated price unless the consumer agrees to the additional charges in writing. A quote, on the other hand, fixes the price only for the scope it describes. Work that wasn’t in it is a change, and you can price it separately if the client agrees.

For home renovations in Ontario, contracts worth more than $50 must be in writing, and a client who signs at home has a 10-day cooling-off period, as Ontario’s guide for home renovation and roofing businesses explains. Business-to-business work is mostly governed by the contract itself, so your terms carry more weight there.

Can a contractor charge more than the estimate?

Only within limits when the client is a consumer, and the limits depend on the province and the kind of work.

Province	Rule on going over the price	Source
Ontario, consumer agreements	No more than 10% above the estimate unless the consumer agrees in writing	Ontario business guide
Ontario, home renovation	No more than 10% above an estimate in the contract, unless the client asks for additional or different work and signs a change	Ontario renovation guide
Ontario, vehicle repair	No more than 10% above the written estimate, or the maximum agreed if the client declined an estimate	Car repair shops: your rights
Alberta, automotive repair	No more than 10% above the estimate, up to a maximum of $100	Alberta Consumer Bill of Rights
Quebec, home renovation	A contractor can’t invoice more than the amount initially agreed; unauthorized extra work can be disputed	OPC: unexpected charges
Quebec, heat pump and air conditioner repair	Written estimate required when a repair is expected to cost more than $50; the repairer can’t ask for more than it states, except for extra repairs the client authorizes	OPC: heating and air conditioning repairs

Other provinces and territories have their own consumer protection laws, so check with your province’s consumer protection office before relying on a number. Everywhere, the safe practice is the same: if the price is going to rise, get the client’s written agreement before you do the extra work.

Worked example. A Toronto plumber estimates a basement drain repair at $2,400 plus 13% HST, $2,712 in total. Ten per cent above the estimate is $2,640 before tax, or $2,983.20 with HST. Opening the floor reveals a collapsed section that needs another $900 of work. Without the homeowner’s written agreement, the most the plumber can bill is $2,983.20. With a signed change for the extra work, the price becomes $3,300 plus HST, $3,729 in total.

When should you give an estimate, and when a quote?

Quote what you can see and measure; estimate what you can’t, and say why.

• Quote: painting a measured room, installing a fixture the client has bought, a fence on a clear lot, a website with a fixed page list.
• Estimate: renovations in older houses, leaks and drains, anything behind walls or under floors, work that depends on what the client decides later.
• Both in one document: a fixed price for the defined part, plus an estimate or allowance for the unknown part. For example, “Tile and install: $4,200 fixed. Subfloor repair if needed: estimated $300 to $800, approved before work starts.”

Freelancers face the same choice. A fixed project fee is a quote; an hourly rate with expected hours is an estimate, and it’s fair to state a cap you won’t exceed without asking.

How do you write an estimate?

Write it so the client can see what the number depends on, and what happens if it changes.

1. Call it an estimate and give a single figure, or a figure for each stage, not just a vague range.
2. List your assumptions: what you expect to find, the quantities you measured, the materials you priced.
3. Name the unknowns and price them as allowances where you can.
4. State the change process: extra or different work is priced in writing and approved before it starts.
5. Say how far the price can move without approval, within your province’s rules. In Ontario, for example: “The final price will not exceed this estimate by more than 10% without your written agreement.”
6. Add a “valid until” date, because material prices move.

How do you write a quote?

Make the scope precise, because the scope is the only thing that lets you charge for changes later.

A quote needs the fixed total, a scope of work that says what is included and what is excluded, the materials and finishes you priced, the schedule, the payment terms and deposit, a “valid until” date and a place for the client to accept. The quote template lays these out with filled-in Ontario and Alberta examples. Before you send it, read the exclusions as if you were the client: anything they could reasonably assume is included, and isn’t, belongs in writing.

What should you do when the job changes?

Stop, price the change in writing, and get it accepted before you do the work.

Ontario’s renovation guide says that if a project changes in a major way, you should give the client a revised written estimate and both sign off on the new price. Quebec’s consumer protection office tells homeowners they can dispute charges for extra work the contractor did without authorization, even work that was genuinely needed, such as rotten boards found under shingles. A two-line change order, signed or accepted by email before work starts, is what prevents both outcomes. Keep it with the original estimate and the invoice.

Is an estimate or a quote the same as an invoice?

No. An estimate or quote is an offer; an invoice asks for payment for work done or agreed, and that is what triggers GST/HST.

If you’re registered, showing GST/HST on an estimate tells the client the full price, but no tax is payable just because you sent it. Under the CRA’s time-of-liability rules, tax is payable on the earlier of the day the client pays and the day payment becomes due, which is generally your invoice date. A document that only previews the bill is a pro forma invoice, which is different again.

…and where does Keel fit?

Keel: Invoice Maker & Receipts, by Ilura Technology OÜ, is an iPhone app for people who work for themselves. You write an estimate or quote on your phone, and when the client accepts it, it becomes the invoice in one tap, at the price they agreed. Each job keeps its estimates, receipts, expenses and invoices together, so the original price and any revised one sit next to the final bill.

Keel doesn’t check your estimate against provincial consumer law, decide which tax applies, file GST/HST returns or connect to the CRA. Records stay on your iPhone with no account, no bank connection and no cloud sync, and the App Store privacy label reads “Data Not Collected.” It’s free with no invoice limit (free invoices carry a small “Made with Keel” footer), and Keel Lifetime is a one-time purchase ($249.99 USD; the App Store shows your local price) that adds custom branding, a signature, premium templates and accountant-ready exports. Keel: Invoice Maker & Receipts on the App Store.

Frequently asked questions

What is the difference between an estimate and a quote? An estimate is your best judgement of what the work will cost, and the final price can move within limits. A quote is a fixed price for a defined scope, and it changes only if the scope does. Clients often use the words interchangeably, so the wording inside the document matters more than its title.

Is an estimate legally binding in Canada? An accepted estimate can be part of a binding contract, and consumer law limits how far you can go over it. In Ontario, a supplier can’t bill a consumer more than 10% above an estimate unless the consumer agrees in writing. Other provinces have their own rules, so check yours before relying on a margin.

Can a contractor charge more than the quote? Not for the work the quote describes, unless the client agrees. Extra or different work outside the quoted scope can be priced separately, but get the price accepted in writing before you start. In Quebec, a homeowner can dispute charges for extra work done without authorization.

How do you write a quote for a job? Describe the work precisely, including what isn’t included, list materials and labour, show the fixed total with GST/HST if you’re registered, and add the schedule, payment terms, deposit, a “valid until” date and a line for acceptance. The quote template has a layout to copy.

How long should an estimate or quote be valid? As long as you can hold your prices. Thirty days suits most jobs, and 14 is safer when material costs are moving. Write the actual date rather than “30 days”, and re-check your costs before reissuing an expired quote.

---

This article is general information, not legal or tax advice. Consult a qualified lawyer or accountant in your province.