Client Won’t Pay Final Invoice: Letter of Demand or Tribunal?

You’ve completed the work. Delivered everything agreed. Sent the final invoice. And now—silence, excuses, or outright refusal to pay.

When a client won’t pay your final invoice in Australia, you face a choice: send a letter of demand first, or skip straight to tribunal action. The wrong move costs you time and money.

Why final invoices are different

By the time you invoice for the last stage of a project, you’ve already delivered most or all of the work. You’ve exhausted your leverage. You can’t withhold further service.

This power imbalance changes your recovery strategy. The client has everything. You have a piece of paper.

Letter of demand: when it works

A letter of demand is a formal written notice requiring payment by a specified date, with consequences for non-payment.

When it’s the right first move:

• The debt is under $3,000 — tribunal filing fees may approach the recovery amount
• The client is a legitimate business — reputational pressure often prompts payment
• There’s a genuine misunderstanding — confusion about scope or variations, not malice
• You want to preserve the relationship — future work is possible
• The client has capacity to pay — not insolvent, just difficult
• Speed matters — a demand letter can be sent in 24 hours; tribunal applications take weeks

Why a demand letter often works:

A formal demand letter forces the client to acknowledge the debt, respond in writing, and weigh the cost of defending tribunal action against simply paying. Either way, it creates a documented paper trail you can rely on if the matter escalates.

Cost and time:

• Cost: $79-$200 depending on complexity
• Time: 1-2 days to draft and send, 7-14 days response window
• Total exposure: Under $250 and three weeks

If the client pays, you’ve recovered your money for minimal cost. If they don’t, you’ve created a paper trail that strengthens your tribunal application.

Going straight to tribunal: when it makes sense

Small claims tribunals (NCAT in NSW, VCAT in Victoria, QCAT in Queensland) handle disputes up to $10,000-$25,000 depending on jurisdiction.

When you should skip the demand letter:

• The client has ignored multiple invoices and reminders — they’re avoiding payment, not confused
• The debt is over $5,000 — the tribunal filing fee is proportionate to the recovery
• The client is a known non-payer — industry reputation indicates they’ll ignore demands
• Time is critical — the client is winding down operations, moving interstate, or liquidating assets
• You need a judgment for enforcement — to pursue garnishment, property seizure, or bankruptcy proceedings
• The relationship is already destroyed — no future work is possible

Tribunal action creates a binding order. If you win, you have enforcement options. If the client still doesn’t pay, you can escalate to sheriff’s officers, garnishee orders, or winding-up proceedings.

Cost and time:

• Filing fee: $100-$500 depending on claim value and state
• Time to hearing: 8-16 weeks in most jurisdictions
• Preparation time: 10-20 hours gathering evidence, drafting application, preparing submissions
• Total exposure: $500-$1,500 including lost work time

Tribunals typically don’t award legal costs in small claims matters, so even if you win, you absorb your preparation time.

The decision tree

Start with a letter of demand if:

1. Debt is under $3,000, AND
2. Client is a registered business with assets, AND
3. You’ve sent fewer than three invoice reminders, AND
4. The relationship isn’t completely hostile

Go straight to tribunal if:

1. Debt is over $5,000, OR
2. Client has ignored three+ reminders over 60+ days, OR
3. Client is closing down, relocating, or liquidating, OR
4. You need a judgment for enforcement

Do both in sequence if:

1. Debt is $3,000-$10,000, AND
2. Client is a legitimate business, AND
3. You can afford 2-3 weeks for the demand letter process

The sequential approach gives you two bites: the demand letter often prompts payment, and if it doesn’t, you’ve strengthened your tribunal application with documented refusal.

What ClaimDone does differently

Most small businesses either waste money on lawyers for simple demand letters ($500-$1,500), draft their own letters that lack legal weight, jump to tribunal without attempting formal demand, or give up entirely on debts under $5,000.

ClaimDone’s Proprietary AI Engine reads your invoice, contract, and correspondence, then generates a professionally formatted letter of demand for you to review and approve before it is sent to the client.

For $79 you get:

• Letter drafted in about 15 minutes based on your evidence
• Sent to the client by email once you review and approve the draft
• A record of when the letter was sent
• 7-14 day payment deadline with consequences clearly stated
• No ongoing subscription or hidden fees

If the client pays, you’ve recovered your money for less than an hour’s billable time. If they don’t, you have documented refusal that strengthens your tribunal application.

Evidence you need for either path

Whether you send a demand or file at tribunal, gather this now:

• Original invoice with clear payment terms and due date
• Contract or agreement (even if it’s just an email exchange confirming scope and price)
• Proof of delivery — emails, photos, shipping receipts, sign-off documents
• All correspondence — every reminder, excuse, promise to pay
• Payment history — if they’ve paid previous invoices, it proves the arrangement
• Bank records — showing no payment received

The stronger your evidence, the faster the resolution.

State-specific tribunal thresholds

Each state has different limits:

• NSW (NCAT): Up to $30,000 (consumer), $10,000 (general)
• Victoria (VCAT): Up to $100,000 (with consent)
• Queensland (QCAT): Up to $25,000
• South Australia (SACAT): Up to $25,000
• Western Australia (Magistrates Court): Up to $10,000 (small claims)
• Tasmania (Magistrates Court): Up to $5,000 (small claims)

Check your state’s threshold before deciding. A $12,000 debt in Victoria goes to VCAT easily; in Tasmania it exceeds small claims and requires Magistrates Court with higher costs.

The cost of waiting

Every week you delay, the client’s financial position may worsen. Companies liquidate. Individuals move interstate. Bank accounts empty. Assets disappear.

Acting within 30 days of the due date gives you maximum leverage. After 90 days, recovery rates drop significantly. After six months, you’re chasing ghosts.

What happens after the demand letter

Three possible outcomes:

1. Full payment

The client pays, you move on. Total cost: $79 and two weeks.

2. Negotiated settlement

The client offers partial payment or a payment plan. You can accept, counter-offer, or proceed to tribunal. ClaimDone can prepare a deed of settlement if you reach agreement.

3. Refusal or silence

The client ignores the letter or disputes the debt. You now have documented refusal, which strengthens your tribunal application. File within 30 days of the demand deadline while the evidence is fresh.

When you need a lawyer instead

ClaimDone handles straightforward unpaid invoice disputes. You need a qualified Australian lawyer if:

• The debt exceeds your state’s tribunal threshold
• The client has filed for bankruptcy or liquidation
• There’s a genuine dispute about scope, quality, or completion
• The contract involves complex terms, penalties, or IP rights
• You’re dealing with a government entity or large corporation with in-house legal
• The client has threatened counter-claims or defamation action

For standard “work done, invoice sent, client won’t pay” scenarios, a letter of demand resolves most cases without legal fees.

Get your letter of demand sent today

If you’ve decided a demand letter is the right first move, ClaimDone can have it drafted and delivered within 24 hours.

Complete the 5-minute intake form, upload your invoice and key correspondence, and the Proprietary AI Engine generates a professionally formatted letter citing the applicable law. Once you review and approve the draft, ClaimDone sends it to the client by email and keeps a record of when it was sent.

If the client pays within the 7-14 day deadline, you’ve recovered your money for $79. If they don’t, you have documented refusal that strengthens your tribunal application.

Get your AI-generated letter of demand prepared and sent now, or if you’re ready to file at tribunal, prepare your tribunal application with the same evidence-based process.

Frequently Asked Questions

How long should I wait before sending a letter of demand for an unpaid final invoice?

Send a letter of demand 7-14 days after the invoice due date if the client hasn’t responded to standard reminders. Acting within 30 days gives you maximum leverage before the client’s financial position potentially worsens or they move assets.

Can I go straight to tribunal without sending a letter of demand first?

Yes, there’s no legal requirement to send a demand letter before filing at tribunal in Australia. However, tribunals typically view favourably applicants who’ve attempted to resolve the dispute first, and a demand letter often prompts payment without needing tribunal action.

What if my client claims the work was defective or incomplete?

If there’s a genuine dispute about quality or scope, a letter of demand may not resolve it. You’ll likely need tribunal action where both sides present evidence. Document everything: sign-offs, approvals, correspondence accepting the work, and any complaints raised before you invoiced.

How much does it cost to file a small claims tribunal application in Australia?

Filing fees range from $100-$500 depending on your state and the claim value. NSW NCAT charges $106 for claims under $10,000. Victoria VCAT charges $71.90 for claims under $3,000. Check your state tribunal’s fee schedule, and remember tribunals typically don’t award legal costs in small claims.

What happens if I win at tribunal but the client still doesn't pay?

A tribunal order allows you to pursue enforcement: garnishee orders against their bank account, seizure and sale of assets via sheriff’s officers, or if they’re a company owing over $4,000, a statutory demand that can lead to wind-up proceedings. The judgment remains enforceable for 12 years in most states.