Client Won’t Pay Final Invoice? Here’s What to Do Next

You finished the project. Delivered everything they asked for. Sent the final invoice with payment terms clearly stated. And now — nothing.

This is one of the most frustrating situations a sole trader, contractor, or small business owner faces. You did the work. You’re owed the money. But chasing unpaid invoices eats time you don’t have.

Here’s the recovery process — from first formal demand through to tribunal if needed.

Why clients don’t pay (and why it doesn’t matter)

Clients who won’t pay final invoices usually fall into one of these categories:

• Cash flow problems — they’re waiting on their own payments and using you as an interest-free loan
• Dispute invention — suddenly claiming the work wasn’t up to standard, despite never raising concerns during the project
• Deliberate non-payment — hoping you’ll give up because the amount seems too small to chase
• Disorganisation — genuinely lost track of the invoice in their system

If you delivered what was contracted and they accepted the work, they owe you the money.

Step 1: One final informal attempt

Before escalating, send one last informal email:

• Reference the invoice number and amount
• Confirm the work was delivered and accepted
• State the payment is now overdue
• Ask for payment within 7 days
• Mention that you’ll need to take formal steps if it remains unpaid

This gives them one clear opportunity to pay before things get formal. Many clients will pay at this point.

Step 2: Letter of demand

If the informal email doesn’t work, you need a formal letter of demand. This document:

• States the debt clearly with supporting evidence
• Gives a deadline for payment (typically 7-14 days)
• States what will happen if they don’t pay (tribunal proceedings, or statutory demand if they’re a company)

A properly drafted letter of demand shows you’re serious and creates a formal record that you attempted to resolve the matter before taking legal action.

What makes a letter of demand effective:

• Professional legal formatting
• Specific reference to the contract or agreement
• Clear calculation of the amount owed (invoice total plus any late fees if your terms allow them)
• Realistic deadline that gives them time to respond
• Delivered by registered post or email with read receipt

ClaimDone generates a letter of demand based on the evidence you upload — your contract, invoice, proof of delivery, and any correspondence. The system drafts it and delivers it automatically to the client. Flat fee of $97, done in under an hour.

Step 3: Final demand (if needed)

If the letter of demand deadline passes with no payment and no genuine dispute raised, send a final demand:

• References the previous letter of demand
• States payment is now seriously overdue
• Gives a final deadline (usually 7 days)
• Confirms you will commence tribunal proceedings immediately after that deadline

Most clients who were testing whether you’d actually follow through will pay at this stage.

Step 4: Tribunal application

If they still won’t pay, you file in your state’s small claims tribunal:

NSW: NSW Civil and Administrative Tribunal (NCAT) — claims up to $30,000 VIC: Victorian Civil and Administrative Tribunal (VCAT) — claims up to $10,000 in the general list QLD: Queensland Civil and Administrative Tribunal (QCAT) — minor civil disputes up to $25,000 WA: Magistrates Court (small claims) — claims up to $10,000 SA: South Australian Civil and Administrative Tribunal (SACAT) — minor civil claims up to $12,000 TAS: Magistrates Court (small claims) — claims up to $5,000 ACT: ACT Civil and Administrative Tribunal (ACAT) — claims up to $10,000 NT: Local Court (small claims) — claims up to $25,000

What you need to file:

• Completed tribunal application form
• Copy of your letter of demand and final demand
• Copy of the contract or agreement
• Copy of the invoice
• Proof you delivered the work (emails, delivery confirmations, project sign-off)
• Any correspondence showing they accepted the work

Filing fees typically range from around $50 to $200 depending on the claim amount and state. You can usually claim this back if you win.

What happens at the hearing:

Tribunal hearings are informal compared to court. You don’t need a lawyer. You present your evidence, the other party presents theirs, and the tribunal member makes a decision.

If you’ve done the work, have a clear contract, and can prove delivery, you will typically win. The tribunal will order them to pay the invoice amount plus your filing fee.

Step 5: Enforcing the tribunal order

Winning at tribunal gives you an enforceable order. If they still don’t pay, you can:

• Register the order as a judgment debt
• Instruct a sheriff or bailiff to seize assets
• Apply for a garnishee order on their bank account
• If they’re a company, consider a statutory demand leading to wind-up proceedings

Most clients pay once there’s a tribunal order. The consequences of ignoring it are serious — it affects their credit rating and can lead to asset seizure.

Special case: If the client is a company

If your non-paying client is a registered company (Pty Ltd or Ltd) and the debt is $4,000 or more, you have a powerful additional option: a statutory demand under the Corporations Act.

A statutory demand gives the company 21 days to pay or face presumed insolvency and potential wind-up proceedings. It often results in immediate payment.

ClaimDone prepares the statutory demand and supporting affidavit for $197 if your situation qualifies.

How Claim Done helps at each stage

Letter of Demand — Upload your contract, invoice, and evidence. ClaimDone’s Proprietary AI Engine drafts a professionally formatted demand letter and delivers it automatically. $79 flat fee.

Final Demand — If the first letter didn’t work, Claim Done generates a final demand referencing the previous letter and confirming tribunal proceedings will follow. Same $97 fee.

Tribunal Application — Claim Done prepares your tribunal application pack with all supporting documents formatted for filing. State-specific, ready to lodge. $79 flat fee.

Statutory Demand — If the client is a company owing $4,000+, Claim Done prepares the statutory demand form and affidavit template. $79 flat fee.

All services are fixed-price, no subscription, Australia-wide. Most documents are ready within 60 minutes.

What not to do

Don’t keep working for them. If they won’t pay the final invoice, don’t start the next project hoping they’ll pay both together.

Don’t accept vague promises. “I’ll pay you next week” means nothing unless it’s in writing with a specific date and consequences for non-payment.

Don’t let it drag on. The longer you wait, the harder it gets to recover. Clients who successfully delay payment for months know you’ll eventually give up.

Don’t make threats you won’t follow through on. If you say you’ll file at tribunal, you must actually file. Empty threats destroy your credibility.

When to get a lawyer

For most unpaid invoices under $10,000, the process outlined above is enough. You don’t need a lawyer to send a demand letter or file at tribunal.

You should consider getting legal advice if:

• The amount is over $25,000
• The client has raised a genuine dispute about the quality of your work
• The contract terms are unclear or disputed
• The client is threatening to countersue
• You’re dealing with a government body or large corporation with in-house legal

ClaimDone does not provide legal advice. For complex disputes, consult a qualified Australian lawyer.

Start with a proper demand letter

A client who won’t pay your final invoice is testing whether you’ll actually do something about it. Most sole traders and small business owners don’t — they write it off and move on.

You did the work. You’re owed the money. The process is straightforward, and the cost of recovery is minimal compared to writing off the debt.

Start with a proper letter of demand. If that doesn’t work, send a final demand. If they still won’t pay, file at tribunal.

Ready to recover what you’re owed?

ClaimDone generates your letter of demand in under an hour — professionally formatted, delivered automatically. Upload your evidence, answer a few questions, and the system handles the rest.

No subscription. No hourly rates. $79 flat fee to get your money back where it belongs.

Start your letter of demand now

Frequently Asked Questions

How long should I wait before sending a letter of demand?

Send one final informal email giving them 7 days to pay. If that doesn’t work, send the letter of demand immediately. Don’t wait months — the longer you delay, the harder recovery becomes and the more it signals you won’t actually follow through.

Can I add interest or late fees to an unpaid invoice?

Only if your original contract or invoice terms specifically allowed for it. You can’t add fees retrospectively. If your terms included a late payment clause (e.g., 10% after 30 days), you can claim that amount in your letter of demand.

What if the client claims the work wasn't done properly?

If they never raised quality concerns during the project and accepted delivery, a last-minute dispute claim is usually a delay tactic. Your letter of demand should address this by referencing their acceptance. If they raise a genuine dispute, you may need to negotiate or proceed to tribunal where both sides present evidence.

Do I need a written contract to recover an unpaid invoice?

A written contract makes recovery much easier, but you can still recover without one. Emails, quotes, text messages, and proof of delivery can establish that an agreement existed. You just need evidence that work was requested, delivered, and accepted.

How much does it cost to file at tribunal?

Filing fees vary by state and claim amount, typically ranging from $50 to $200. You can usually claim this back if you win. The tribunal process is designed to be accessible and low-cost for small business owners — you don’t need a lawyer for most straightforward debt recovery cases.