Why subcontractors don't get paid in Australian construction (and what's changing)

The reason subcontractors get paid late isn't because builders are dishonest. Most aren't. The builders you've worked with for years, the ones who answer the phone, the ones who give you steady work, the ones whose homes you've been in for a beer after a long week. Those builders aren't trying to cheat you. They're stuck.

On a residential job, the homeowner pays the builder in stages. A deposit, then progress payments at frame, lock-up, fixing, and completion. Each progress payment covers the work done at that stage, the materials used, and the trades who did the work. The builder takes the money in and pays out materials, subcontractors, and his own overheads.

The catch is timing. Materials suppliers want paying in 30 days. Subcontractors want paying in 14 days, sometimes 7. The next progress payment from the homeowner could be six weeks away, longer if the inspection drags or the bank is slow. The builder is running a small bank between the homeowner and everyone else who wants paying.

If the builder has cash reserves and a steady book of work, the small bank works. If a progress payment runs late and the reserves are thin, the bank breaks. There are plenty of reasons a progress payment runs late. A dispute over defects. An inspection that takes an extra fortnight. A homeowner whose lender has gone quiet. None of these mean the builder is insolvent. He's got receivables that are real. He just doesn't have the cash this week. And the people waiting on cash this week are subcontractors and suppliers.

From your side it looks like the builder ignoring your invoice. From his side he's waiting on a progress payment he can't control, from a homeowner he can't pressure, from a bank that doesn't care. He's between the owner and you, absorbing the timing mismatch. You're the one carrying the cost of it.

To see why subcontractors are the ones carrying the cost, and not the builder, the owner, or the bank, follow the money on a residential job.

The owner's progress payment lands in the builder's general operating account. Not in trust. Not ringfenced for the trades who did the work. It mixes with everything else in that account. Money owed to suppliers from previous jobs. The builder's overheads. His personal drawings. Loan repayments from older debts. From that mixed pool, he pays whatever's most urgent. The supplier threatening to stop deliveries. The ATO. The apprentices' wages. The subcontractor who chased hardest this week.

The builder isn't doing anything wrong by managing money this way. It's how the legal structure of the industry is set up. Standard residential building contracts don't require the owner's funds to be held in a separate account. They don't require subcontractor invoices to be paid in the order they were submitted. They don't stop the builder paying old debts out of money that arrived for the current job.

This is the part that surprises homeowners when they hear it for the first time. They think their progress payment is paying for their job. Mostly it is, eventually. On the way it can pay for last quarter's materials, an old supplier debt, a tax bill, or another job that ran over. By the time it reaches you, the subcontractor who did the work this week, there might not be much left.

None of this is an accident. It evolved when residential construction was a smaller, more local business. Most builders worked with the same handful of subcontractors for decades. Contracts were smaller. Progress payments were less variable. The owner often paid the builder in cash and the builder paid the subcontractors in cash on the same day, on site. The payment infrastructure of the industry grew up in that world. The contracts have grown since then. Half-million-dollar new builds and seven-figure renovations are routine now. The payment infrastructure hasn't kept pace.

Residential construction is asking 1990s payment tools to handle 2020s project sizes. Subcontractors are exposed because they're at the end of the chain. Last to get paid, first to absorb timing breakdowns, unsecured creditors when something goes wrong.

The gap between what the system produces and what subcontractors need is what the Security of Payment legislation tries to fill. Every Australian state has a Security of Payment Act, though the names vary. In Victoria it's the Building and Construction Industry Security of Payment Act 2002. In NSW it's the 1999 Act of the same name. In Queensland the protections are wrapped into the BIF Act 2017. The detail is different in each state. The intent is the same: give subcontractors and suppliers a legal way to chase payment that's faster than going to court.

The mechanics. You serve the builder a payment claim under your state's Act. The builder has a defined window, 10 to 15 business days depending on the state, to either pay the claim or formally dispute it with a payment schedule. If he ignores the claim or doesn't follow the process, you can apply to an adjudicator. Adjudicators are independent professionals who decide payment disputes within weeks. Their decisions are binding, and the courts will enforce them.

SOPA exists because the problem just described, subcontractors carrying the cost of builders' cashflow timing, was severe enough that every state government in Australia decided it needed legislation. That's how broken the underlying system is.

But SOPA has limits. It works when the builder has the money but isn't paying. It doesn't work when the builder doesn't have the money. If the builder is insolvent, you can win an adjudication and still not get paid, because there's nothing to pay you with. SOPA is a tool against builders who won't pay. It isn't a tool against builders who can't. The line between those two situations is often blurry until a liquidator gets appointed.

If you haven't used SOPA, learn how it works in your state before you need to. Each state's act is different in the detail. The time limits are tight. Miss a deadline and you've usually missed your chance.

The problem this piece describes is finally getting attention. The pressure is coming from regulators, from inside the industry, and from new payment tools. None of it is fast. All of it is real.

From regulators. SOPA enforcement has tightened in most states over the last decade. The Porter Davis collapse in 2023 set off a wave of follow-up regulatory pressure that's still working its way through state parliaments. There's growing awareness among owners that the deposit they hand over to a builder doesn't sit in a protected account. It goes into the builder's general operating cashflow, where it can pay debts from previous jobs. Owner protection schemes, including VMIA in Victoria, HBCF in NSW, and QBCC in Queensland, are being scrutinised, and in some states expanded.

From inside the industry. Trade associations are increasingly vocal about subcontractor protection. Conversations at federal and state level about residential construction reform now include subcontractor representatives in ways they didn't a decade ago. Porter Davis made it harder for anyone to keep treating subcontractor non-payment as a private commercial matter rather than a problem with the industry as a whole.

From new payment tools. A category is emerging where owner funds are held in regulated escrow rather than in the builder's operating account. The funds are released as work is verified, and subcontractors are paid through the same flow. The money for the work is already there, externally held, before the work is invoiced. BuildFair is one Australian example, built for residential. The change at the heart of these tools is the same regardless of which one you use: the builder stops being the small bank between the owner and the subcontractor.

None of this is anyone's fault, exactly. The system that produces these outcomes wasn't designed to put subcontractors last. It evolved that way as the industry scaled, and nobody had the leverage to fix it on their own. Builders are inside the same broken machine subcontractors are. So are owners. So, in different ways, are banks, insurers, and regulators.

What's changing is that the problem is starting to be recognised as a problem with the system, rather than as a series of individual disputes between individual builders and individual subcontractors. Regulatory pressure, industry awareness, and emerging payment infrastructure mean the next decade in Australian residential construction is likely to look different from the last three.

If you've spent your career on the tools watching subcontractors get paid last, you should know this. The fix isn't here yet. It's closer than it's been at any point in the last 30 years.