Builder cashflow in construction: why you bankroll the job

On a residential build, money moves in one direction along a chain. The owner draws on savings or a construction loan, pays the builder against a progress payment schedule, and the builder pays the trades and suppliers who did the work. In theory each stage funds the next.

The schedule is a staged earned-value ladder: a deposit, a set of progress stages tied to milestones like slab, frame, lock-up and fixing, then a final amount held to completion. Each claim is supposed to cover the work in that stage plus a margin. If you want the mechanics of how each stage is valued and claimed, the guide on how a payment schedule works walks through it stage by stage.

The problem is timing. The ladder pays in lumps tied to milestones, but your costs run continuously. Wages, materials, plant hire and your own overheads do not wait for the owner to approve the next claim and the bank to release the drawdown. So the money you are owed for a stage almost always arrives after you have already spent it. That is the same trap the wider progress payments explainer describes from the owner side, just felt in reverse by the builder who fronts the cost.

The gap is not one delay. It is several delays stacked on top of each other, and they compound.

Each delay is individually reasonable. Stacked together they open a window where you have paid out for the work but not yet been paid for it. That window is the gap you finance.

When costs land before income, someone has to bridge the difference, and under the current system that someone is you. You pay the trades and the supplier accounts to keep the job moving, then wait to be reimbursed by the next progress payment. For a stretch of every project, your own money is propping up the build.

The Reserve Bank has noted that construction firms typically run on thin margins and carry heavy exposure to cashflow timing, which is one reason the sector reports more insolvencies than most. You can read the Reserve Bank of Australia commentary on the sector for the wider picture. The Australian Bureau of Statistics also tracks construction insolvencies as a persistent share of the national total, and the ABS business indicators show how exposed the industry is.

The point is not that you are bad with money. It is that the structure asks a small business to act as the project's lender. You absorb the gap on margins that were never priced to fund weeks of someone else's build. Variations make this worse, because work you have already started can sit unfunded until the change is signed off. Both builder and owner variations need dual approval before they move the contract sum, so until that approval lands the cost is yours to carry, as the guide to variations and cost overruns sets out.

Here is where the gap becomes genuinely dangerous. Because progress payments usually land in your general operating account, the money for one job mixes with the money for every other job. When job A is short this week, the deposit that just came in for job B is sitting right there in the same account.

So you use it. Not out of dishonesty, but because the bills on job A are due today and job B's money is the only cash on hand. This is cross-project subsidy: the owner of one build is unknowingly funding the timing gap on another.

It works until it does not. The day a single large job stalls, or a dispute freezes a payment, the chain of borrowing from one job to settle the next has nothing left to draw on. This is the mechanism behind a great many cases of builder insolvency in Australia, and the trades at the end of the chain are the ones left unpaid for work already done. They are last in line by design, not by neglect, which is the same structural problem covered in why subcontractors do not get paid.

The gap does not disappear, because money still moves in stages. What can change is whose money is at risk while it sits between approval and payment, and whether one job's funds can be quietly spent on another.

On a BuildFair project, owner deposits and progress payments are held in regulated custody with BuildFair banking partner Kobble, separate from your operating account, and released only on verified release conditions. Kobble operates under AFSL 545391 (Yondr Money Pty Ltd), and BuildFair itself does not directly hold customer funds. Because the funds for each build are ringfenced to that build, the money for job B cannot be pulled across to cover job A. Cross-project subsidy stops being possible, which protects you as much as the owner. You can read more about how that separation works in the explainer on how regulated escrow protects owner funds.

On the payment side, subcontractor and supplier payments release on a fixed 7-day clock from invoice approval. That is a calendar-day hold between approval and the bank send. The ledger journal posts immediately, so the obligation is recorded the moment a claim is approved; only the bank transfer waits out the clock. Everyone can see what is owed and when it is due, which removes the guesswork that lets timing turn into trouble.

Every posting also lands in a double-entry, hash-chained ledger, and settlement is marked only on confirmed bank evidence, never on an acknowledgement alone. So when a payment shows as cleared, it has genuinely cleared. The trust and security page sets out how that record is kept tamper-evident.

None of this changes that staged payments take time. What it changes is that the money is accounted for, ringfenced, and visible, so the gap stops being something you silently absorb on margins that cannot carry it.

You cannot abolish the timing gap on your own, but you can stop it quietly draining you.

This article is general information, not legal, financial, or tax advice. For advice on a specific contract, dispute, or your own position, speak to a qualified lawyer, your state tribunal such as VCAT or its equivalent, or Legal Aid.