Validate a payment schedule point by point against the Act and case law — before you rely on it or miss your window to respond.
Check whether the schedule properly identifies the payment claim it is responding to — a threshold requirement under the legislation.
Verify that the respondent has stated a scheduled amount (even if nil) and whether it complies with what the Act requires.
Assess whether reasons for withholding have been given — a deficiency here can limit what a respondent can argue in adjudication.
Sopal walks through each formal requirement of the legislation and flags what passes, what is borderline, and what is missing — so you can act before deadlines close.
Under the security of payment legislation in Queensland, New South Wales, Victoria and South Australia, a respondent (the party that has received a payment claim) has a defined window within which to serve a payment schedule. The payment schedule is the respondent's formal response: it must identify the claim, state a scheduled amount, and — where the scheduled amount is less than the claimed amount — give reasons for the difference.
The legislation in each jurisdiction has its own requirements and timeframes. Under Queensland's Building Industry Fairness (Security of Payment) Act 2017 (the BIF Act), for example, the payment schedule must be served within the period set out in the Act (which may be affected by the terms of the contract). The NSW Building and Construction Industry Security of Payment Act 1999, the VIC Building and Construction Industry Security of Payment Act 2002 and the SA Building and Construction Industry Security of Payment Act 2009 each set their own timeframes. Always confirm the current provisions that apply to your contract and jurisdiction, as timeframes have been amended over time and vary significantly between states.
Getting the payment schedule right is not optional. The consequences of a defective or late payment schedule can be severe — in some cases the respondent loses the right to dispute the claimed amount, and the claimant may be entitled to recover it as a debt or proceed directly to adjudication. This makes payment schedule review one of the most time-sensitive and high-stakes tasks in the SOP process.
While the precise wording differs across jurisdictions, the legislation generally requires that a payment schedule:
Courts and adjudicators have considered what each of these elements requires in practice. On identifying the claim, the schedule must make clear which claim it is responding to — a general or ambiguous response can be problematic. On stating the scheduled amount, the Act requires a specific amount; a schedule that simply disputes liability without nominating an amount may not comply. On reasons, the level of detail required has been considered in case law — reasons that are so vague or generic as to give the claimant no real understanding of the grounds for withholding may not satisfy the legislative requirement.
A payment schedule that does not satisfy the formal requirements of the relevant Act can have serious consequences for the respondent. Depending on the jurisdiction and the nature of the defect, the respondent may:
These are not theoretical risks. They arise regularly in practice, and they arise precisely because respondents — often under time pressure — serve schedules without properly checking them against the Act. Sopal's payment schedule review is designed to reduce that risk by bringing the formal requirements to the surface before it is too late to act.
Timeliness is equally critical. Serving a substantively compliant schedule one day late may have the same effect as not serving one at all. The time limits under the SOP legislation are strict. The clock generally starts running from the day the payment claim is served, and the period is short — under some contracts and jurisdictions it can be as little as ten business days. Missing the deadline is not a matter of paying a penalty or seeking an extension; it typically results in the respondent losing its statutory right to contest the claimed amount.
Sopal's due-date calculator works alongside the payment schedule review to make sure you are tracking the right deadline for your jurisdiction and contract. These two tools are designed to be used together.
Each jurisdiction has different formal requirements, different timeframes, and different case law on what constitutes a valid schedule. Sopal applies the right framework for each.
Payment schedule review in Sopal is built for speed and precision. Whether you are a contractor's contract administrator checking a schedule received from the principal, a subcontractor's lawyer reviewing what the head contractor has served, or a quantity surveyor advising a client on their options, the process is the same:
Provide the payment schedule and the corresponding payment claim. Sopal uses both documents to assess whether the schedule properly identifies the claim and whether the scheduled amount and reasons are responsive to what was actually claimed.
The formal requirements vary by jurisdiction and can be modified by the terms of the construction contract in some circumstances. Select the state and, where relevant, provide key contract terms so the review applies the correct legal framework.
Sopal runs through each formal requirement of the relevant Act — identification of the claim, scheduled amount, reasons for withholding — and flags each as compliant, requiring attention, or likely defective. Where a requirement is borderline, Sopal explains why and references the relevant provisions and case law principles.
Sopal checks the date and method of service against the timeframe requirements for the jurisdiction. If the schedule is late or served by an unaccepted method, this is flagged clearly. This step integrates with the due-date calculator to confirm the applicable deadline.
The review produces a structured risk summary — what is compliant, what is defective, and what options are available. For claimants, this may mean the right to treat the respondent as having made no schedule and to proceed to recover the claimed amount. For respondents, it may mean an urgent need to serve a replacement schedule (where the legislation permits) or to understand the restricted grounds available in adjudication.
If you need to build or amend a schedule, move to the Payment Schedule Builder to draft one that meets the legislative requirements.
If you have received a payment schedule that seems to contest your claim without proper reasons, or if you are not sure the schedule is valid, review it before your adjudication window closes. A defective schedule may mean the full claimed amount is recoverable.
If you have served or are about to serve a payment schedule, confirm it satisfies the formal requirements before it goes out. A defective schedule you served yourself is just as damaging as one served against you.
Use the checklist review as a structured first-pass tool when a payment schedule lands on your desk. Pair it with the AI case law research and the full Sopal Research database to assess adjudication prospects.
Advise your clients on whether the schedule received or prepared meets the Act — without needing to brief a lawyer for a preliminary check. Flag issues early so there is still time to act.
Payment schedule review does not stand alone. In practice, reviewing a payment schedule is one step in a connected process that spans the full security of payment cycle. Sopal Projects gives you the tools for each step:
| Feature | What it does |
|---|---|
| Payment Claim Review | Validate a payment claim against the Act — reference date, supporting statement, service requirements |
| Payment Schedule Builder | Draft a compliant payment schedule with structured fields for the scheduled amount and reasons |
| Payment Claim Builder | Build a payment claim that meets the formal requirements across QLD, NSW, VIC and SA |
| Due-Date Calculator | Calculate payment schedule deadlines, adjudication windows and payment due dates |
| Interest Calculator | Calculate statutory interest on overdue amounts under the relevant Act |
For legal professionals who need adjudication decision research, AI case law analysis or adjudicator statistics alongside these tools, Sopal Plus combines Projects and Research in one subscription.
Under the security of payment legislation in each jurisdiction, if a respondent fails to serve a payment schedule within the required timeframe, the claimant generally becomes entitled to recover the claimed amount as a debt — without the need for adjudication. The claimant may also apply for adjudication in some jurisdictions. The precise consequences and procedures differ between Queensland, NSW, Victoria and South Australia, so confirm the current provisions of the relevant Act and seek legal advice if you are in this situation.
In most cases, yes. The timeframes under the SOP legislation are strict, and a schedule served after the deadline is generally treated as if no schedule were served. There is no general power for an adjudicator or court to extend the time for serving a payment schedule. This is why Sopal's service and timeliness check is a core part of the review — knowing the deadline and confirming service was within it are threshold questions before anything else matters.
This depends on the jurisdiction, the nature of the defect, and whether the time for serving a schedule has expired. In some cases the legislation permits a replacement or amended schedule to be served within the original timeframe. Once the deadline has passed, however, the options are generally very limited. If you have identified a defect in a schedule you have already served and time is still running, act immediately — Sopal's Payment Schedule Builder can help you draft a replacement quickly.
The SOP legislation requires that where the scheduled amount is less than the claimed amount, the payment schedule must indicate the reasons for the difference. What constitutes adequate reasons has been considered by courts and adjudicators, and the case law makes clear that reasons which are so vague or conclusory as to give the claimant no real understanding of the grounds for withholding may not satisfy the requirement. The standard is not identical across jurisdictions. Sopal's review applies the relevant case law principles and flags reasons that appear insufficient, but where there is genuine doubt, legal advice should be sought.
Under most of the SOP legislation, the respondent's ability to raise grounds in adjudication that were not included in the payment schedule is significantly restricted. An adjudicator is generally limited to considering only the reasons for withholding that were identified in the payment schedule. This is one of the most important reasons to get the payment schedule right from the outset — grounds omitted from the schedule may be lost permanently. This applies across QLD, NSW, VIC and SA, though the precise terms of each Act differ.
No. Sopal provides a structured, informed review against the formal requirements of the legislation — it is a tool to help practitioners and parties identify issues quickly and work more efficiently. It is not a substitute for legal advice. Payment schedule disputes can involve complex questions of fact, contract interpretation and law. Where a defective or late schedule is identified, or where there is any doubt about the effect of a schedule on your rights, you should seek advice from a construction lawyer. This page is general information only and does not constitute legal advice.
Sopal Projects covers Queensland (BIF Act 2017), New South Wales (Building and Construction Industry Security of Payment Act 1999), Victoria (Building and Construction Industry Security of Payment Act 2002) and South Australia (Building and Construction Industry Security of Payment Act 2009). Select your jurisdiction when starting a review, and Sopal applies the requirements of the relevant Act. If your project involves a cross-border contract, confirm which jurisdiction's Act applies — generally it is determined by where the construction work is performed or where the related goods and services are supplied.
They are complementary tools designed to be used together. Use the Payment Schedule Review when you have received a schedule and need to assess its validity, or when you have drafted a schedule and want to check it before service. Use the Payment Schedule Builder when you need to draft a schedule from scratch or produce a compliant replacement. If the review identifies defects in a draft schedule, you can move directly to the Builder to fix them — all within the same Sopal Projects session.
The content on this page is general information about security of payment legislation and Sopal's tools. It is not legal advice and does not take into account your specific circumstances, contract or jurisdiction. The SOP legislation differs between Queensland, NSW, Victoria and South Australia, and provisions have been amended over time — always confirm the current requirements of the relevant Act. If you have a specific payment dispute or are uncertain about your rights, consult a construction lawyer.
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