Quote vs Estimate: What Are You Actually Promising on an Electrical Job?

Quick answer: an estimate is an approximate price based on the information available. A quote offers a price for specified work and can become binding when accepted as part of a contract, including its conditions. For Australian electrical work, state whether the scope and price are confirmed, identify assumptions and agree changes before doing extra work. The document's terms and applicable law matter, not just its heading.

This is general business information, not legal advice. Domestic building and consumer rules differ by jurisdiction and job type, so check the requirements that apply to your contract.

What is an estimate?

An estimate helps the client understand likely cost before every detail is known. A homeowner might send a photo of an old switchboard and ask for a budget before arranging access.

That photo may help identify equipment, but it cannot establish every circuit condition, concealed cable route or defect. If those details are unverified, make that limitation visible.

State what the estimate is based on, what needs assessment and when you can give a confirmed proposal. A rough number without those explanations can create the wrong expectation.

What is a quote?

A quote proposes a price for defined work. NT Government guidance explains that a quote can become a contract when a trader offers work at a fixed price and the consumer accepts the offer, including its conditions.

That is why scope, inclusions, exclusions and validity matter. Do not assume that putting "estimate" at the top overrides clear promises elsewhere, or that every quote is automatically binding before acceptance.

Avoid terms that suggest you can change an accepted price whenever you choose. Customer rights and applicable building laws still matter.

What belongs in either document?

• Work description: locations, quantities and the equipment or fittings included.
• Price basis: a fixed total, an approximate allowance or another clearly explained basis.
• Assumptions: access, existing condition and other information not yet verified.
• Exclusions: work genuinely outside the proposal, such as agreed patching or painting exclusions.
• Tax presentation: clearly state GST treatment where applicable and the total the customer is expected to pay.
• Validity and next step: explain the period of the offer and how the client can approve or request clarification.

Specific exclusions are more useful than a blanket line saying "anything else costs extra". The customer should understand what has actually been offered.

What happens when the scope changes?

Suppose a customer accepts a proposal for two power points, then asks for another outlet outdoors. The extra outlet is a change to the requested work, not a reason to silently rewrite the original agreement.

Document the additional scope, price and any time impact. Obtain the required approval before proceeding. Follow any contract and local rules for variations, including exceptions for urgent safety work where applicable.

If you discover a concealed defect, make the situation safe using the appropriate procedure, explain what you found and clarify the next work and price. Do not let an AI-generated assumption stand in for that conversation.

How does this apply to JSI quotes?

JSI supports quote documents and online client accept or decline responses. Its PDF generation includes wording for indicative estimates and formal quotes, so review the document mode and final wording before sending.

An online response is part of your record of the client's decision. It does not, by itself, establish that every contract requirement is satisfied. Check scope, tax, terms and any mandatory paperwork for the job.

Use JSI to organise the proposal, not to decide what you are legally allowed to charge after circumstances change. Keep the accepted version and agreed variations together in your business records.

Before you press send

Read the quote as the homeowner would. Can they tell what is included, what is still unknown, what the price means and how changes will be agreed? If not, fix that first. Clarity protects the relationship better than a document full of vague caveats.

Frequently asked questions

What is the difference between a quote and an estimate in Australia?

An estimate approximates cost using available information. A quote offers a price for specified work and can become binding when accepted as part of a contract. The terms, circumstances and applicable law determine the commitment.

Is every electrical quote legally binding as soon as it is sent?

No. Sending a quote is not the same as acceptance. Whether it forms a contract depends on the offer, acceptance, conditions and applicable legal requirements.

Can an electrician increase the price after a quote is accepted?

Do not assume an accepted fixed price can be changed unilaterally. Extra or changed work should be documented and agreed under the contract and applicable rules. Get local advice for disputed situations.

Can I send an estimate based only on customer photos?

You can give an initial estimate if you explain its basis and limits honestly. Photos may not show concealed conditions, so identify the assessment needed before confirming scope and price.