What to Do When Your Client Disputes Your Invoice (And Won’t Pay)

You did the work. You sent the invoice. Now your client claims the work was defective, incomplete, or not what they ordered — and they’re refusing to pay.

This happens to tradies, consultants, designers, developers, and service providers across Australia every day. You have clear legal rights. The challenge is knowing what to do next without making it worse.

Understand Why Clients Dispute Invoices

Before you react, understand the common reasons:

• Genuine quality concerns — they believe the work was substandard or incomplete
• Scope creep confusion — they expected more than what was agreed in writing
• Budget shock — the final amount is higher than they anticipated
• Cash flow problems — they can’t pay right now and are stalling
• Bad faith — they never intended to pay and are manufacturing excuses

The reason determines your response strategy.

Review Your Contract and Scope

Pull out your service agreement, quote, proposal, or email chain. Answer these questions honestly:

• What exactly did you agree to deliver?
• Did you deliver what was promised?
• Were there any written variations to the scope?
• Did the client approve additional work before you did it?
• Are your terms and conditions clear about payment timing and disputes?

If you don’t have a written agreement, reconstruct the timeline from emails, text messages, and any other written communication.

Reality check: If the client has a legitimate complaint about quality or scope, acknowledge it. Fixing a genuine issue now is cheaper than fighting about it later.

Respond in Writing (Stay Professional)

Do not call the client and argue. Do not send an emotional email. Do not post about them on social media.

Send a short, professional email that:

• Acknowledges their concerns without admitting fault
• Asks for specific details about what they believe is wrong
• Refers to the original agreement or scope
• Proposes a phone call or meeting to discuss
• Sets a deadline for their response (7 days is reasonable)

Example:

> Hi [Client], > > Thanks for your email regarding invoice [number]. I’d like to understand your concerns in detail so we can resolve this quickly. > > Could you please provide specific examples of what you believe was not delivered according to our agreement on [date]? I’ve attached a copy of the scope we agreed to for reference. > > I’m happy to arrange a call this week to discuss. Please let me know your availability by [date].

This keeps everything documented and gives the client a chance to either clarify or back down.

Document Everything

From this point forward, put everything in writing:

• Keep copies of all emails, text messages, and written communications
• Take screenshots of any relevant social media posts or online reviews
• Save all versions of contracts, quotes, proposals, and invoices
• Document phone calls in writing immediately after (date, time, what was said)
• Keep records of all work delivered (photos, files, timesheets, delivery confirmations)

If this ends up in a tribunal, the side with better documentation typically wins.

Offer a Reasonable Resolution (If Appropriate)

If the client has a point — even a small one — consider offering a compromise:

• A partial refund for any genuinely incomplete work
• Completing the disputed work at no extra charge
• A payment plan if cash flow is the real issue
• A small discount to close the matter and preserve the relationship

Only offer what you’re genuinely willing to do. Do not promise something you can’t deliver just to end the conversation.

If you reach an agreement, document it in writing and have both parties sign it. ClaimDone’s deed of settlement service can prepare this for you in under an hour.

Send a Formal Letter of Demand

If the client won’t engage, won’t provide specifics, or is clearly stalling, it’s time to escalate.

A letter of demand is a formal written notice that:

• States the amount owed and the basis for the debt
• References the applicable contract and consumer protection principles
• Gives the client a final deadline to pay (typically 7-14 days)
• Warns of legal action if payment is not received

Most clients pay after receiving a formal letter because they realise you’re serious and they don’t want the hassle or cost of defending a tribunal claim.

ClaimDone’s letter of demand service drafts and sends a professionally formatted letter for a flat $97 fee. You complete a 5-minute form, the Proprietary AI Engine generates the letter, and it’s delivered to the client automatically.

Know When to Write It Off

Sometimes chasing the debt costs more than the debt itself. Consider writing it off if:

• The amount is under $500 and the client has disappeared
• You have no written agreement and weak evidence
• The client is genuinely insolvent (bankrupt, company wound up)
• The stress and time cost outweigh the recovery amount

Writing off a bad debt is a commercial decision to focus on paying clients instead of problem ones.

Take Legal Action (If Necessary)

If the debt is significant and the client still won’t pay after a letter of demand, your options include:

Small claims tribunal — for debts up to $10,000 (varies by state), this is a low-cost, lawyer-free process. Claim Done can prepare your tribunal application and supporting documents.

Magistrates or District Court — for larger debts, you’ll likely need a lawyer. The cost and complexity increase significantly.

Debt collection agency — they’ll chase the debt for a percentage (typically 15-30%). Only worth it for clear-cut debts with good documentation.

Statutory demand — if the client is a registered company and owes $4,000+, a statutory demand gives them 21 days to pay or face wind-up proceedings. This is the nuclear option and should only be used when you’re certain of the debt.

Prevent Future Invoice Disputes

Once you’ve dealt with this client, protect yourself going forward:

Get everything in writing — use a proper service agreement for every job, no matter how small.

Be clear about scope — define exactly what you will and won’t deliver. If the client asks for extras, document the variation and get written approval before proceeding.

Invoice progressively — don’t wait until the end of a long project. Invoice at milestones or monthly to reduce exposure.

Use clear payment terms — state when payment is due, what happens if it’s late, and whether you charge interest on overdue amounts.

Require deposits — take 30-50% upfront for new clients or large projects.

Check references — for large jobs, ask for references from previous suppliers. A client with a history of non-payment will have a trail.

How Claim Done Helps

When a client disputes your invoice and won’t pay, your response determines the outcome. Stay professional, document everything, give them a chance to resolve it, and escalate when necessary.

Most invoice disputes are resolved without going to court. A well-written letter of demand usually does the job.

ClaimDone’s letter of demand service is built for this situation. You don’t need a lawyer. You don’t need to know the law. You just need to tell us what happened. Our Proprietary AI Engine drafts a professionally formatted letter and delivers it to the client automatically. Flat $97 fee. Done in 60 minutes.

If the client still won’t pay, Claim Done can prepare your tribunal application, witness statement, and legal submissions — everything you need to take the matter to your state’s small claims tribunal.

Don’t let a non-paying client cost you more than the invoice. Take action today.

Frequently Asked Questions

Can a client refuse to pay an invoice if they're unhappy with the work?

Not if you delivered what was agreed in the contract. The client must pay even if they’re unhappy. However, if the work was genuinely defective or incomplete, they may have grounds to withhold payment or claim a refund under consumer protection principles. The key is whether you delivered what was promised in writing.

How long do I have to chase an unpaid invoice in Australia?

You typically have six years from the date the debt became due to take legal action in most Australian states. However, waiting too long makes recovery harder — clients disappear, evidence gets lost, and memories fade. Act within 90 days of the invoice due date for the best chance of recovery.

What if the client claims the work was defective but won't provide details?

Ask for specific examples in writing and set a deadline (7 days). If they can’t or won’t provide details, it’s likely a stalling tactic. At that point, send a formal letter of demand. Vague complaints without evidence don’t give them the right to withhold payment.

Should I stop work for other clients if one won't pay?

No. One bad client doesn’t mean you stop working. Focus on protecting yourself going forward with better contracts, deposits, and payment terms. Use the unpaid invoice as a lesson, not a reason to shut down your business.

Can I charge interest on an overdue invoice?

Yes, if your terms and conditions state that you charge interest on overdue invoices. Without a written term, you can’t automatically add interest. However, if you take the matter to court or a tribunal, you can typically claim interest as part of your legal costs.