Unpaid Subcontractor Invoice in New South Wales: Security of Payment Claim or Local Court

You finished the job. The invoice went out weeks ago. Now the head contractor or client is ghosting you, making excuses, or refusing to pay. If you are a subcontractor in New South Wales, you have three main recovery paths: a letter of demand, a security of payment claim under SOPA, or a debt claim in the Local Court of New South Wales.

An unpaid invoice is a debt claim for the Local Court, not NCAT. NCAT hears consumer claims, which are brought by the consumer who bought the goods or services, not by the business that did the work. The Local Court’s Small Claims Division hears claims up to $20,000 and its General Division hears claims over $20,000 up to $100,000.

When a letter of demand is enough

A letter of demand is the fastest and cheapest way to recover an unpaid subcontractor invoice in New South Wales. It is a formal written notice stating what you are owed, why, and what happens if the debt is not paid.

When it works best:

• The amount owed is clear and backed by your invoice
• The debtor is solvent and capable of paying
• You want to avoid court fees and formal proceedings
• You need something on the record before escalating

A properly drafted letter sets a clear deadline (typically 7 to 14 days) and cites the relevant law. The debtor either pays, proposes a payment plan, or at least responds. If they ignore it, you have a documented paper trail for a Local Court claim or further action.

Claim Done prepares and sends your letter of demand by email for $49. You tell us about your invoice, contract, and supporting evidence. The system drafts a letter citing the applicable New South Wales law and delivers it by email in about 5 minutes.

Security of payment claims under SOPA

If your unpaid invoice relates to construction work or related goods and services, you may have a faster option: a payment claim under the Building and Construction Industry Security of Payment Act 1999 (New South Wales).

SOPA is designed to keep cash flowing through construction supply chains. It gives subcontractors a statutory right to progress payments and a fast-track adjudication process if payment is withheld.

Who can use SOPA in New South Wales?

SOPA applies to:

• Construction work (building, engineering, demolition, excavation, installation, repair)
• Related goods and services (materials, plant hire, design work, project management)
• Work performed under a construction contract (written, oral, or implied)

It does not apply to:

• Residential building work under a contract with a homeowner
• Work outside the construction industry (IT services, marketing, professional services)
• Some final payments after practical completion (check the contract terms)

How SOPA works

1. Issue a payment claim — a written demand for payment, referencing the contract and the work done. It must be served within the timeframe set out in the contract, or within 12 months of the work if no timeframe is specified.

1. Wait for a payment schedule — the respondent has 10 business days to issue a payment schedule stating what they will pay and why. If they do not respond, they lose the right to dispute the claim later.

1. Apply for adjudication — if the payment schedule is inadequate or missing, you can apply to an authorised adjudicator within 10 business days. The adjudicator reviews both sides and makes a binding determination, usually within 10 business days.

1. Enforce the determination — if the adjudicator rules in your favour, the determination is enforceable as a judgment debt.

Cost and timing

• Adjudication application fee: around $1,500 to $3,000 (varies by adjudicator)
• Adjudicator’s fee: split between the parties or allocated by the adjudicator
• Timeline: 20 to 30 business days from payment claim to determination

SOPA is fast, but not cheap. It is best suited to debts over $10,000 where the debtor is likely to pay once an adjudicator rules. For smaller amounts, a letter of demand or a Local Court claim may be more cost-effective.

Limitations of SOPA

SOPA adjudication determines what is owed now, based on the contract and the work done. It does not resolve final disputes about defects, variations, or damages — those issues can still go to court later.

SOPA does not apply if the debtor is insolvent. If the company is in liquidation or administration, you will need to lodge a proof of debt with the liquidator instead.

Local Court of New South Wales: a debt claim

If a letter of demand does not work, and SOPA does not apply or is not worth the cost, your next option is a debt claim in the Local Court of New South Wales.

NCAT is not the forum for an unpaid subcontractor invoice. NCAT hears consumer claims, which are claims brought by a consumer about goods or services supplied to them. As the subcontractor, you supplied the work, so your claim is a debt. The Local Court’s Small Claims Division hears claims up to $20,000 and its General Division hears claims over $20,000 up to $100,000. Small claims proceedings are less formal and less technical, and the rules of evidence do not apply.

When to use the Local Court

• The debt is up to $100,000
• SOPA does not apply or you missed the SOPA timeframe
• The debtor disputes the invoice or claims defective work
• You need a binding judgment to enforce the debt

How to start a claim

1. Prepare a statement of claim — you will need the debtor’s full legal name, address, and details of the claim. It can be filed through the NSW Online Registry.

1. Pay the filing fee — Filing fees change each 1 July; check the current fee on the Local Court’s website before you file.

1. Serve the statement of claim — it must be served on the debtor, who can then pay, admit the claim or file a defence.

1. Attend the pre-trial review and hearing — a defended small claim goes to a pre-trial review first, where a registrar, assessor or judge tries to help the parties agree. If it does not settle, it goes to a hearing. You present your evidence (invoice, contract, correspondence, photos, witness statements). The debtor presents their case. The court makes a binding decision.

1. Enforce the judgment — if the court gives judgment for you and the debtor still does not pay, you can enforce it through a writ of execution, garnishee order, or bankruptcy notice.

Timeline and costs

• Filing fee: Filing fees change each 1 July; check the current fee on the Local Court’s website before you file.
• Timing: depends on the court list, service, and whether the debtor files a defence
• Enforcement: additional costs if the debtor does not comply voluntarily

The Local Court is the usual route for subcontractor debts where SOPA does not apply or the debtor is genuinely disputing the claim.

Claim Done’s Tribunal Application ($97) drafts a Local Court statement of claim for a New South Wales debt. You tell us what evidence you have, and the system drafts the statement of claim and a witness statement outline. You approve it, then file and serve it yourself.

Which option is right for you?

Start with a letter of demand if:

• The amount is under $10,000
• The debtor has not formally disputed the invoice
• You want a fast, low-cost first step

Use SOPA if:

• The work is construction-related
• The amount is over $10,000
• You need fast cash flow and can afford the adjudication fees
• The debtor is solvent and likely to comply with a determination

Go to the Local Court if:

• SOPA does not apply or is not cost-effective
• The debtor is disputing the quality of work or the amount owed
• You need a binding judgment to enforce the debt
• The amount is up to $100,000 (Small Claims Division up to $20,000, General Division over $20,000)

Debts over $100,000 go to the District Court.

Common mistakes subcontractors make

Waiting too long to act. Debts get harder to recover as time passes. Memories fade, evidence is lost, and debtors become less cooperative. Act within weeks, not months.

Not keeping proper records. You need a clear paper trail: signed contract or purchase order, detailed invoices, delivery dockets, photos of completed work, email correspondence. Without evidence, your claim is just your word against theirs.

Threatening legal action without following through. If you say “I will take you to court” and then do nothing, you lose credibility. Either escalate or negotiate.

Using SOPA for the wrong type of work. SOPA only applies to construction work and related services. If you are a graphic designer, IT contractor, or marketing consultant, SOPA does not help you. Use a letter of demand or a Local Court claim instead.

Not serving documents properly. The Local Court and SOPA both have strict rules about how and when documents must be served. If you get it wrong, your claim can be delayed or dismissed.

How Claim Done helps New South Wales subcontractors

Claim Done is built for small business owners and subcontractors who need legal-style documents fast, without paying lawyer fees.

For unpaid invoices in New South Wales, Claim Done offers:

• Letter of demand — $49, drafted and sent by email in about 5 minutes
• Tribunal Application — $97, drafts a Local Court statement of claim for a New South Wales debt, with a witness statement outline
• Statutory demand — $97, for debts over $4,000 owed by a registered company

You tell us about your invoice, contract, and evidence. Our Programmatic Algorithms work from your answers, draft the document citing the applicable New South Wales law, and deliver it in the format you need. No subscription, no hourly fees, no waiting weeks.

Claim Done does not give legal advice. It generates legal-style documents based on the information you give us.

Take action on your unpaid invoice

An unpaid subcontractor invoice in New South Wales does not mean writing off the debt. Start with a letter of demand. If that does not work, escalate to SOPA for construction work or a Local Court claim for everything else. Keep detailed records and act fast.

If you need a letter of demand, get your letter of demand drafted in about five minutes and sent once you approve it for $49. If you are ready to go to the Local Court, get your Local Court statement of claim drafted with the Tribunal Application for $97. Either way, you get a professionally drafted document citing the applicable New South Wales law.

Frequently Asked Questions

Can I use SOPA for unpaid invoices if I'm a sole trader subcontractor in New South Wales?

Yes, SOPA applies to sole traders, partnerships, and companies performing construction work or supplying related goods and services in New South Wales. Your business structure does not matter — what matters is the type of work and whether it falls under a construction contract.

What happens if the debtor ignores my letter of demand in New South Wales?

If the debtor ignores your letter of demand, you can start a debt claim in the Local Court (Small Claims Division up to $20,000, General Division over $20,000 up to $100,000), serve a statutory demand if the debtor is a company and the debt exceeds $4,000, or pursue other debt recovery options. The letter creates a paper trail showing you attempted to resolve the matter before formal proceedings.

How long does a Local Court claim take for an unpaid subcontractor invoice?

There is no fixed timeframe. It depends on the court list, how quickly the statement of claim is served, and whether the debtor files a defence. A defended small claim goes to a pre-trial review before any hearing. An unpaid subcontractor invoice is a debt claim for the Local Court, not NCAT.

Can I still use SOPA if the contract is verbal or implied?

Yes, SOPA applies to oral and implied construction contracts in New South Wales, not just written ones. However, proving the terms of a verbal contract is harder — you will need evidence such as emails, text messages, quotes, invoices, and witness statements to support your payment claim.

What if the debtor claims the work was defective or incomplete?

If the debtor disputes the quality or completeness of the work, they must provide evidence such as photos, expert reports, or correspondence. You will need to respond with your own evidence showing the work met the contract requirements. The Local Court or a SOPA adjudicator will weigh both sides and make a decision. A letter of demand alone may not resolve a genuine dispute — you may need court proceedings.