If you’ve ever finished the work, sent the invoice, and then waited… and waited… you already understand why the Security of Payment Act exists. In New South Wales, it gives subcontractors a fast, enforceable way to get paid for work you’ve actually done — without waiting for a dispute to crawl through the courts.
This is a plain-English guide to how it works: the mechanism, the deadlines that matter most, and what’s actually changing in 2026. No jargon, no scare tactics — just what you need to know to stand on solid ground.
What the Act actually does
The Building and Construction Industry Security of Payment Act 1999 (NSW) gives anyone who carries out construction work — or supplies related goods and services — a statutory right to progress payments, plus a quick way to enforce that right if the money doesn’t come. The principle is simple: you should get paid as you go, and a disagreement over one item shouldn’t be an excuse to freeze the whole payment. Crucially, it sits on top of your contract. You can’t sign these rights away, and neither can the other side.
Does it apply to you?
If you’re doing construction work (or supplying related goods and services) under a contract in NSW, it almost certainly does. That covers the vast majority of commercial subcontracting and a lot of residential work too. The main carve-out is work done directly for a homeowner who lives in (or is going to live in) the property — a contract with an owner-occupier for their own home generally sits outside the Act. If you’re a subbie working under a head contractor, you’re squarely inside it.
How it works: payment claims and payment schedules
The whole system runs on two documents.
The payment claim. This is what you serve to ask for payment. To be valid it needs to identify the work (and any related goods and services), state the amount you’re claiming, and state that it’s made under the Act. That last line matters — leave it off and you risk the claim being treated as invalid.
The payment schedule. Once you’ve served a claim, the other party (the “respondent”) has a choice: pay it in full, or reply with a payment schedule. A schedule has to identify your claim, say how much they actually propose to pay, and — if that’s less than you asked for — give their reasons. They have to serve it within 10 business days of getting your claim, or sooner if your contract sets a shorter window.
The 10-day rule: what happens if they ignore your claim
This is the part worth tattooing on the inside of your eyelids. If the respondent doesn’t serve a payment schedule within 10 business days and doesn’t pay by the due date, they become liable for the full amount you claimed. From there you have two routes: recover it as a debt, or take it to adjudication (more on that below).
One catch to know: if you go down the no-schedule route, you generally have to give the respondent notice of your intention to apply for adjudication first — which hands them one last 5-business-day window to produce a schedule. It’s a step people miss, so put it on your checklist.
The payment deadlines themselves are capped by the Act, and your contract can shorten them but never stretch them out:
- Principal to head contractor: 15 business days after a payment claim — and your contract can’t lawfully push that out further.
- Head contractor to subcontractor: 20 business days after a payment claim. If a contract tries to give them 45 or 60 days, that part doesn’t hold up.
Adjudication: the fast track to getting paid
Adjudication is the Act’s secret weapon. It’s a quick, paper-based determination by an independent adjudicator — not a courtroom, not a barrister, not months of waiting. If the respondent scheduled less than you claimed (or didn’t pay the scheduled amount), you generally apply within 10 business days of receiving their schedule. The adjudicator then has around 10 business days to decide. The determination is enforceable, which means it has real teeth.
Compared with suing for the debt, adjudication is faster and far cheaper — which is exactly why it exists. The trade-off is that the deadlines are short and strict, so the moment payment goes sideways, the clock is already running.
Two protections every subbie should know
- “Pay when paid” is dead. A clause that says you only get paid once the head contractor gets paid by someone further up the chain has no legal effect. A dispute higher up is not your problem to fund.
- Payment withholding requests. Once you’ve applied for adjudication, you can ask the party above your head contractor to hold back money owed to them — so there’s something there to actually pay you from if you win.
What’s changing in 2026
Short version: in NSW, the fundamentals above are staying put.
In August 2026, NSW passed the Fair Trading and Building Legislation Amendment Act 2026. Despite the name, it’s mostly about licensing and giving the Building Commission NSW and Fair Trading sharper teeth to act against operators who shouldn’t hold a licence. Its only real Security of Payment change is a technical definition tweak — the payment-claim process you’ve just read still stands. The upshot for subbies is actually positive: tougher enforcement against bad actors, same protections for you.
If you work across the border, Victoria is the one to watch. Victoria’s separate payment-law reforms commenced on 15 April 2026 (with more due later in the year) and go much further — broadening what can be claimed and tightening response timelines. Those changes are Victoria-only; they don’t touch the NSW Act. But if your jobs cross state lines, the rules on each side aren’t identical, and that’s worth knowing before you serve anything.
Where this leaves you
The Act is genuinely powerful — but only if you use it correctly and hit the deadlines. In practice, most of the damage is done earlier, in the contract itself: short time-bars, set-off clauses, or “pay when paid” wording that shouldn’t be there in the first place. The best time to spot those is before you sign, not when you’re chasing money. If you want to understand one of the clauses that catches subbies out most, see our guide on what “indemnify” means in a construction contract.
Know where you stand before you sign. That’s exactly what ClauseIQ does. Upload your subcontract and get a plain-English risk report in minutes — every risky clause flagged, with a ready-to-use list of what to ask for. $49 a contract, not $2,000. Get your free risk assessment →
Frequently asked questions
How long does someone have to pay a payment claim in NSW?
The Act caps the maximum timeframes: a principal must pay a head contractor within 15 business days, and a head contractor must pay a subcontractor within 20 business days of the payment claim. A contract can set shorter deadlines, but not longer ones.
What happens if a builder doesn’t respond to a payment claim?
If they don’t serve a payment schedule within 10 business days and don’t pay by the due date, they become liable for the full claimed amount. You can then recover it as a debt or go to adjudication (giving the required notice first where no schedule was served).
Can you contract out of the Security of Payment Act?
No. The Act overrides contract terms that try to exclude, modify or restrict its operation. You can’t sign your rights away, and a clause attempting to do so has no effect.
Is “pay when paid” legal in NSW?
No. “Pay when paid” and “pay if paid” clauses are void under the Act. Your right to payment doesn’t depend on someone further up the chain being paid first.
This is general information to help you understand your rights — not legal advice. The Act is technical and the deadlines are strict. If you’re in a live payment dispute, or unsure how the rules apply to your contract, speak to a construction lawyer.
