How Do Australian Construction Subcontractors Prepare a Valid Security of Payment Claim?

October 15, 2026

A valid Security of Payment claim starts with the law in the state where the work sits: use the right reference date, identify the work and amount, include the required statutory wording where required, serve it by a permitted method, and preserve proof of service. Then calendar the payment-schedule and adjudication deadlines before they pass.

A claim is more than an invoice. It is a sequence: entitlement, document, service, response, deadline. Miss one link and the next step becomes harder.

When can a subcontractor serve a Security of Payment claim in Australia?

A subcontractor can serve a claim only when the relevant state rules and the contract permit it, so start by identifying the project state, the contract reference date, and whether the claim is final or progress-based.

In NSW, head contractors, subcontractors, suppliers, plant and equipment hirers, and consultants can claim amounts owed for construction work or related goods and services under a contract or within the last 12 months, whichever is later. If the contract sets no claim date, the reference date is the last day of each month, and only one claim can be made for each reference date, according to the NSW Government.

Queensland uses the contract reference date. Where the contract is silent, it is the last day of the month in which the work was performed or the goods and services were supplied. Non-final claims generally must be given by the contract deadline or within 6 months after completion. Final claims can also be made up to 28 days after the final defects-liability period ends.

WA contractors can make progress claims once each month, or more often if the contract allows. The WA regime generally applies to construction contracts entered on or after 1 August 2022; earlier contracts remain under the former regime. Victoria covers most construction contracts, including oral, written, and mixed contracts.

State	Claim timing or reference point	Key point to check
NSW	Contract date, or last day of each month if none is stated	One claim per reference date
Queensland	Contract date, or month-end if none is stated	Final and non-final claims have different outer limits
Victoria	Progress, final, single, and milestone claims can be covered	Claim must state it is made under the Act
WA	Once per month, unless the contract allows more often	Check whether the 2021 Act applies to the contract

Dates are evidence. Record the reference date, the date served, the service method, and receipt. A claim served without a reliable service record leaves an avoidable gap.

What documents should I attach to a construction payment claim?

Attach the documents that let the respondent and, if needed, an adjudicator trace the amount claimed back to the contract, the work, and the proof of delivery or completion.

The claim itself should be written. In NSW it must state the amount due, describe the work, goods, or services, and be served in a permitted way. The NSW Government suggests work-completion statements, completion certificates, delivery dockets, photographs, and documents required by the contract.

Build one claim file before service. It should contain the executed contract and scope, approved or disputed variations, invoices, delivery dockets, timesheets where they support labour claimed, progress measurements, completion certificates, photographs, correspondence about scope or payment, and proof that the claim was served. The point is not bulk. The point is a clean path from each line item to supporting material.

For Victorian adjudication, the Victorian Building Authority identifies contracts, payment claims, schedules, invoices, supplier invoices, measurements, test results, quality-assurance certificates, and expert reports as relevant evidence. Attach what proves the claim at the time it is made. Do not assume a later explanation can repair an unclear claim.

Residential work needs a separate check. NSW says its Act applies to owner-occupier residential construction contracts, and a subcontractor claim connected with residential construction must include the prescribed statement that it is made under the Act. Victoria excludes direct domestic building contracts between a builder or supplier and a homeowner, while contracts between that builder and its subcontractors or suppliers remain covered. WA excludes direct homeowner home-building contracts valued at $500,000 or less.

What happens if a builder does not provide a payment schedule on time?

A missed payment schedule can leave the respondent liable for the full claimed amount, though the claimant still needs to follow the correct state pathway and deadline for recovery or adjudication.

In Queensland, a respondent must either pay the full amount by the due date or issue a payment schedule and pay the scheduled amount by that date. A schedule for less than the claim must identify the claim, state the proposed payment, and give all reasons for withholding money. It is due within 15 business days after receipt, or earlier if the contract requires it. The Queensland Building and Construction Commission says a failure to respond can also mean lost rights in dispute processes, work suspension, a subcontractors' charge, or court debt recovery.

Queensland supplies a default due date of 10 business days after a claim is given where the contract states none. Its maximum contractual terms are 25 business days for subcontracts and construction-management trade contracts, and 15 business days for commercial building contracts.

Victoria gives a respondent 10 business days, or an earlier contractual deadline, to provide a payment schedule. If no schedule is given, the respondent is liable for the full amount claimed. WA also makes a respondent liable for the full claim if it does not provide a schedule within 15 business days or an earlier contractual period.

NSW has a distinct no-schedule route. If there is neither a payment schedule nor full payment, the claimant must give notice of an intention to adjudicate within 20 business days of the payment due date, allow another 5 business days for a schedule, then apply within 10 business days after that period. The NSW Government warns that strict timelines apply.

Can I make a Security of Payment claim for residential construction work?

Yes in some residential settings, but the answer turns on the state and on who contracted directly with whom.

NSW expressly applies its Act to owner-occupier residential construction contracts. A subcontractor making a claim connected with residential construction must include the prescribed statement. That wording is not decoration. It is part of the claim process.

Victoria draws a different line. A direct domestic building contract between a builder or supplier and a homeowner is excluded, but the builder's contracts with subcontractors and suppliers remain covered. WA broadly covers residential construction under its 2021 Act but excludes a direct homeowner contract for home-building work valued at $500,000 or less.

Read the contract chain, not only the project label. A house does not answer the coverage question by itself.

Frequently Asked Questions

Do Security of Payment rules differ between NSW, Victoria, Queensland, and WA?

Yes. Each state has its own Act, claim wording, payment-schedule timeframes, residential-work coverage, and adjudication path. NSW, Victoria, Queensland, and WA share the core idea of a written claim and a fast response process, but the deadlines and exclusions are not interchangeable.

What is the deadline to apply for adjudication after a disputed payment claim?

It depends on the state and the response. NSW and Victoria generally allow 10 business days after receiving a lower payment schedule; Queensland allows 30 business days after a disputed schedule. Different deadlines apply where a scheduled amount remains unpaid or no schedule is served.

Can a head contractor use a pay-when-paid clause to delay subcontractor payment?

Not in the states covered by the supplied guidance. Queensland says pay-when-paid provisions are void, while Victoria says paid-when-paid and paid-if-paid clauses have no effect. Check the governing state law and contract before relying on any payment term.

Short deadlines reward orderly records. A claim is strongest when its dates, words, amount, evidence, and service record all point in one direction.