Security of Payment (SOP) legislation exists in every Australian state and territory. It was built specifically to stop the thing that happens constantly in construction — money flowing slowly down the contract chain while everyone waits on everyone else — by giving anyone who does construction work a fast, statutory right to be paid, regardless of what the contract says.
What it actually does
Strip away the legal language and SOP legislation comes down to a few core ideas that hold across every state:
- ✓You have a statutory right to a progress payment for construction work, even if your contract tries to say otherwise or is silent on the point.
- ✓You claim by serving a formal "payment claim" — usually a fairly simple document, not a court filing.
- ✓The other party must respond with a "payment schedule" within a strict deadline, stating what they’ll pay and, if less than claimed, why.
- ✓If a dispute happens anyway, it goes to adjudication — a fast, relatively low-cost process, often resolved in weeks rather than the months or years a court case would take.
This is often called "pay now, argue later." The system is deliberately built to keep cash moving through the industry while bigger disputes get sorted out separately, rather than letting a payment dispute freeze a subcontractor's cash flow for months.
The one rule that matters more than any other
- Miss the payment schedule deadline, and you lose the argument by default. If the party who received your payment claim doesn't respond with a valid payment schedule inside the statutory time limit, they become liable to pay the full amount you claimed — no ifs, no buts, regardless of whether the amount was actually fair or accurate.
This single rule is why this legislation genuinely matters, on both sides of a contract. If you're the one submitting claims, it means a party who ignores your invoice or genuinely forgets to respond in time has, by law, agreed to pay it in full. If you're the one receiving claims, it means a payment claim landing in your inbox is not something to leave for later — the clock starts the moment it's served, not the moment you get around to reading it.
The rules vary by state — this is the part people get wrong
There is no single, national Security of Payment Act. Each state and territory has its own version, and the specific timeframes genuinely differ. Treating them as interchangeable is one of the most common, costly mistakes on multi-state projects.
This is a simplified snapshot, not a substitute for checking the specific Act in your state — and if you're working across state lines, the timeframes that apply depend on where the work is being carried out, not where your business is based.
Victoria just had a major overhaul
If you're working in Victoria, this is genuinely current and worth knowing: recent reforms removed two things that used to trip claimants up constantly — the old "excluded amounts" rule (which used to block disputed variations, latent conditions, and delay costs from being claimed at all) and the requirement for a "reference date" to exist before a claim could even be made. Claims can now be made on the last day of each month by default, and the window to bring a payment claim after practical completion has doubled, from 3 months to 6. A new fairness test also means a harsh notice-based time bar buried in a contract can now be challenged as unenforceable, rather than simply applied against you.
What to actually do if you're not being paid
- ✓Check your state’s specific Act before assuming a timeframe — don’t rely on what a mate in another state told you.
- ✓Serve a proper, compliant payment claim — it needs to identify the work, the amount, and reference the Act, or it may not trigger the statutory process at all.
- ✓Keep a clear paper trail of when it was served and how — the WA courts have specifically confirmed that actual receipt time is what starts the clock, not when the other party gets around to opening it.
- ✓If the deadline passes with no payment schedule, you may already be entitled to the full amount — get advice quickly on how to enforce that, since the window to act doesn’t stay open forever either.
The bottom line
Security of Payment law exists because the construction industry runs on a long chain of people waiting to get paid by the person above them, and it's genuinely designed to work in your favour if you use it properly. The catch is that it runs on strict, unforgiving deadlines that vary by state — which is exactly the kind of detail that's easy to miss when you're focused on the actual job, and exactly the kind of thing worth having checked properly before it costs you money you were always entitled to.