Charged More Than the Quote? Dispute an Inflated Invoice

Has a tradesperson, mechanic or repairer sent you an invoice well above the quote? Or charged you for work you never asked for, or parts they never fitted? Claim Done drafts a formal Invoice Dispute Letter for $49. You answer plain questions about the quote, the invoice and what’s wrong. Claim Done drafts the letter. You approve it, and we email it to the business for you. The letter sets out the quote, the invoice, each discrepancy in a numbered list, the amount you dispute, the amount you accept (if any), and a deadline for them to respond.

When You Might Dispute an Invoice

People commonly dispute an invoice, ideally before paying, when:

• The invoice is higher than the quote and the business never told them the price would increase or asked for their agreement
• They were charged for work they did not ask for — variations, upgrades or additional services done without approval
• They were billed for parts or materials that were not used or fitted, or charged a higher price than the quote stated
• The work was not completed or was done poorly, and the invoice does not reflect that
• The invoice includes charges not mentioned in the quote — call-out fees, admin fees, disposal fees or other costs not disclosed upfront

The Australian Consumer Law contains rules about misleading or deceptive conduct, including about price. Whether a particular charge breaches those rules depends on the facts, including what was agreed and what the business said at the time.

What the Law Says About Quotes and Invoices

The Australian Consumer Law includes rules about clear information on price, about charging for services that were not requested, and about misleading or deceptive conduct. How those rules apply to your situation depends on the circumstances and on what was agreed.

A quote can be a fixed price or an estimate. With a fixed-price quote, a business generally cannot charge more unless the customer agrees to a variation. An estimate is the business’s best guess, and the final invoice is generally expected to be reasonably close to it. A business that expects the cost to be significantly higher should ordinarily tell the customer and seek agreement before continuing.

If a business did work or supplied parts that you did not ask for, you may have grounds to dispute those charges. An invoice that includes undisclosed charges, or that is far higher than the quote with no explanation or agreement, may be open to challenge.

What a Formal Invoice Dispute Letter Does

A formal invoice dispute letter is your written objection to the invoice. It:

• Sets out the quote — the date, the price, what was included, and whether it was fixed or an estimate
• Lists the invoice — the date, the total charged, and each line item you dispute
• Identifies each discrepancy in a numbered list — the extra charges, the unauthorised work, the parts not fitted, the fees not disclosed
• States the amount you dispute and the amount you accept as valid (if any)
• Asks the business to respond by a clear deadline with a corrected invoice or an explanation
• Refers to the Australian Consumer Law and the basis on which you dispute the charges

The letter is calm, factual and commercially direct. It gives the business a fair chance to correct the invoice and creates a written record of your dispute if the matter escalates.

How Claim Done’s Invoice Dispute Letter Works

Claim Done’s Invoice Dispute Letter service costs $49. You answer plain questions:

• Who did the work — the business name, ABN if you have it, and contact details
• The quote — when you received it, the amount, what it covered, and whether it was fixed or an estimate
• The invoice — the date, the total, and each line item
• What’s wrong — each charge you dispute, why you dispute it, and the amount
• What you accept — if part of the invoice is valid, the amount you are prepared to pay
• The deadline you want the business to respond by

Claim Done drafts the letter and you receive it as a PDF. You read it, check it, and approve it. Once you approve it, we email it to the business for you from a Claim Done address, and you receive a copy. The letter is sent as soon as you approve it.

The Steps After You Send the Letter

Step 1: The business receives your dispute letter. They may send a corrected invoice, explain the charges, offer a discount, or ask to discuss it.

Step 2: You decide whether to accept the response. If the business corrects the invoice or offers an explanation you consider reasonable, you can choose to pay the revised amount. If they refuse or ignore the letter, there are further options.

Step 3: You consider escalating. If the business will not correct the invoice and you believe the charges are not justified, options you may wish to consider include:

• Lodging a complaint with your state’s consumer protection agency (Fair Trading, Consumer Affairs, or Consumer Protection, depending on your state)
• Continuing to dispute the amount in writing and seeking independent advice about the risks of not paying
• If the business sues for the full invoice, responding to the claim in your local court or tribunal, where your dispute letter can form part of your evidence

Can You Dispute an Invoice You’ve Already Paid?

You can, but the position is different. Once you have paid, you are asking for a refund rather than withholding payment. The process is similar — you send a formal letter setting out the overcharge and asking for a refund of the disputed amount — but the business already has your money, so it may have less reason to respond.

If you paid by credit card, you may be able to ask your card issuer about a chargeback. Time limits apply and are set by the card issuer and card scheme, so contact your bank early. If you paid by bank transfer or cash, options include a refund demand, a complaint to the regulator, or a tribunal claim.

Free vs Paid: Why Pay for a Dispute Letter?

You can write your own invoice dispute letter for free. You list the quote, the invoice, what’s wrong, and what you want. You send it yourself.

The risk is tone and detail. A letter that is too emotional, vague or aggressive can make the business defensive. A letter that does not clearly itemise each disputed charge, or does not refer to the basis for the dispute, is easier to ignore.

Claim Done’s letter is structured, itemised and commercially firm. It refers to the Australian Consumer Law. It is sent from a Claim Done address, which shows that you are treating the dispute formally. For $49, you get a letter that creates a clear written record. Claim Done is not a law firm and this page is general information, not legal advice.

What Happens If the Business Threatens to Sue?

If a business threatens to sue for the full invoice, it would generally need to show in court or tribunal what you agreed to. Your dispute letter is evidence that you objected to the charges. The business may try to rely on:

• A written agreement to the variation or extra work, or
• Evidence that you requested the work or parts verbally and agreed to the price, or
• Evidence that the charges were disclosed in the quote and you accepted them

What a court or tribunal decides depends on the evidence before it. A dispute letter sent promptly can help show what you objected to and when.

How Claim Done Helps

Claim Done’s Invoice Dispute Letter service is built for this problem. You answer plain questions about the quote, the invoice and what’s wrong. Claim Done drafts a clear, itemised dispute letter that refers to the Australian Consumer Law and gives the business a deadline to respond. You approve the letter, and we email it to the business for you. The service costs $49.

If the business ignores the letter or refuses to correct the invoice, you can consider a formal complaint or a tribunal claim. Claim Done also offers a Letter of Demand service for $49 if you need a sharper follow-up, and a Tribunal Application service for $97 if you decide to take the matter further.

Start Your Invoice Dispute Letter

Been charged more than the quote, billed for work you didn’t ask for, or invoiced for parts that were never fitted? Start your Invoice Dispute Letter for $49. Answer plain questions, approve the letter, and we send it for you as soon as you approve it.

Frequently Asked Questions

Can I dispute an invoice if the quote said it was an estimate?

Yes, you can raise a dispute. An estimate is generally expected to be reasonably close to the final invoice, and a business that expects the cost to be significantly higher should ordinarily tell you and seek your agreement before continuing. If the invoice is far higher than the estimate and you were never told, you can put your objection to the increase in writing.

What if the business says I agreed to the extra work verbally?

You can ask them to provide evidence of that agreement — a text, email, signed variation or recording. If the matter ever reaches a court or tribunal, the business may need to show what you agreed to. Your dispute letter creates a written record that you did not agree.

Do I have to pay the invoice while I dispute it?

Whether and when you need to pay depends on your contract and the circumstances, so it is worth getting independent advice about the risks of withholding payment. A common first step is to send a dispute letter, so that the business can correct the invoice or explain the charges before you decide how to proceed.

How long does the business have to respond to my dispute letter?

The deadline is whatever you set in your letter, and you choose a period that seems fair in the circumstances. If the business does not respond by the deadline, you can consider a complaint to your state’s consumer protection agency or other options.

Can I use the dispute letter as evidence in court or tribunal?

It can form part of your evidence. If the business sues you for the full invoice, or you lodge a tribunal claim for a refund, your dispute letter can show that you objected to the charges and why. It also gives the court or tribunal a record of what you disputed.