Construction financial management,
the complete reference.

Construction financial management is the discipline of running the money on a building business so the true position of every job, and of the company as a whole, is known while decisions can still change it. It is not the year-end accounts and it is not the bank balance. It is the working system that carries the numbers from the estimate that sets the price, through the commitments and invoices that spend it, to the claims that bring the cash back and the reports that tell an owner whether the business is actually earning what it thinks it is.

The discipline is broad, so this page is a hub rather than a single article. It defines the shape of the whole subject and routes to the reference for each part: estimating and margin, procurement and committed cost, cost control and cost to complete, cash flow and forecasting, work in progress and profit fade, and the contractual and tax rules the money runs under.

Why it matters

A residential job earns a thin margin relative to its turnover, and that margin erodes in small increments rather than one dramatic failure. A quote accepted over allowance here, an unpriced variation there, GST spent because it was sitting in the account. None of this is visible in a bank balance, and a business that looks profitable can be carrying losing jobs for months. Builders rarely fail for lack of work. In the operator's experience they fail on cash, and on knowledge that arrived too late to act on. Financial management is the discipline that moves that knowledge forward in time, and it is the difference between running a building business and being run by it.

Financial management does not run in a vacuum. Three external systems set the rules the money moves under, and a builder who manages the internal numbers well but ignores these still loses money they were entitled to keep.

The contract decides when money is claimable and who carries a cost. It fixes the deposit and the claim schedule, defines what a variation is and what it is worth, and sets the machinery for extensions of time and liquidated damages that decide who pays for a late job. It also imposes statutory warranties that carry a rectification obligation long after the final claim is paid. The reference for the contract as an operating document is the contracts hub.

The tax system decides how much of what a builder collects is actually theirs. GST and BAS sit across every progress claim, deposit and retention, and the timing of when GST is owed rarely matches when the cash arrives. Insurance prices the risk the business carries: construction insurance covers the works and the liabilities during the build, while the state home warranty schemes both protect the owner and, through eligibility limits, cap how much work the builder can carry at once. Managing the money well means managing all three deliberately, not discovering them at BAS time or at an eligibility review.

The common failure is not fraud or incompetence; it is after-the-fact accounting doing a job it was never designed for. A ledger records cost when an invoice is entered, weeks after the cost was created by a signed order and sometimes months after the decision that caused it. A builder steering off the ledger is managing commitments with a system that cannot see commitments, and cash with a report built for tax. The control point has to sit where the money is still a choice, which is at the commitment and the claim, not at the bank statement.

The second failure is confusing cash with profit. Deposits and early claims fill the bank account with money owed to future work, GST and suppliers, and a business that reads that balance as earnings spends its way into a hole it cannot see. Many builders describe the same routine, days on the tools and nights reconciling spreadsheets against the ledger, and the output of that effort is still a picture of last month. The numbers that would have changed a decision were never available when the decision was made.

The third failure is terminal and specific to the industry. Because actuals lag and short residential jobs finish before a loss is visible, a losing job can be repeated at volume, each monthly report looking survivable, until the business is losing money on turnover. The failure analysis in building through a downturn keeps returning to the same point: the builders who come through are not those with the most work but those whose financial position was current enough to act on this week.

The operators who manage money well treat it as a timing problem before an accuracy problem. A perfectly accurate report that arrives after lockup cannot save the frame stage; a rough-but-current position, seen the week the quotes are accepted, can. Their systems are built backwards from that observation. Committed cost visible on the day of commitment, invoices captured within days rather than at BAS time, claims raised the moment a stage completes, and a cash forecast rolled weekly so the June shortfall is found in March, not June.

The second thing they build is a review routine, because numbers nobody reviews change nothing. A common working cadence is a short weekly job cost review with the person who can change the outcome, then a monthly review across the whole book with whoever runs the money, where forecasts are challenged line by line and the cash forecast, WIP and open job value are read together. The GST owed on the next BAS is treated as a liability held, not a balance available. The review is deliberately boring; the drama is supposed to have been caught earlier in the week.

Where software fits the workflow

Traditionally the position is assembled by hand, estimate in one file, orders in another, invoices in the ledger, claims in a template, reconciled at night into a spreadsheet that is stale by Friday. In VIABUILD the same loop runs connected. The won estimate becomes the budget, purchase orders draw down committed cost as they are raised, Oryn™ reads and codes supplier invoices as they arrive, and cost tracking holds budget, committed, actual and forecast on one line per cost code, with claims and their GST flowing through to Xero. The builder still makes every call. What disappears is the reconstruction work before each one.

Financial management itself is not legislated, but the environment around it is unforgiving and several of its inputs are regulated. The points below are labelled by evidence class; statistics are point-in-time and the rules differ by state, so confirm current sources before relying on any of them.

• Government statistics. ASIC insolvency data has repeatedly shown construction topping the industry count for companies entering external administration, with the sector recording thousands of failures in recent years. The figures are point-in-time; confirm against current ASIC statistics before quoting any number.
• Legislation. Each state and territory regulates residential building contracts, including deposit caps, progress payment requirements and the form of variations. Security of payment legislation gives a statutory right to claim and be paid, though its coverage of residential work varies by jurisdiction. Confirm the rules in your state, and see the security of payment guide.
• Government guidance. The ATO sets how GST is attributed on progressive supplies such as building contracts, and when it must be reported on a business activity statement. GST on progress claims, deposits and retentions is a cash-timing issue as much as a compliance one; the detail is in GST and BAS for builders, and tax treatment should be confirmed with a registered adviser.
• Common practice. Home warranty schemes in most states cap a builder’s open job value through eligibility limits, and insurers and financiers increasingly ask for WIP schedules and up-to-date financials. A builder’s financial management is, in effect, graded by the people who decide how much they can build. See Open Job Value and financial visibility.

Illustrative only, not a benchmark. A builder finishes a strong quarter with a comfortable bank balance and reads it as a good result. Underneath, that balance is a $60,000 deposit on a job not yet started, a $40,000 progress claim just paid for a stage whose suppliers have not yet invoiced, and roughly $15,000 of GST collected that is due on the next BAS. The real earned position is thinner than the account suggests, and one job in the book is quietly over on committed cost that has not hit the ledger. Three months later the suppliers invoice, the deposit is spent building the next house, the BAS falls due, and the job that looked fine closes out below margin. Nothing dramatic happened. The money was always going to arrive where it did; the business just never saw it coming, because it read one number, the bank balance, instead of the five that describe the position. Financial management is the practice of reading the other four in time.

Budget (the priced baseline the job is measured against), committed cost (cost created by an order but not yet invoiced), actual cost (invoiced and verified cost), forecast final cost (the whole-of-job cost prediction), margin (the share of price kept after cost), cash flow (money in and out over time), work in progress (the earned-versus-billed position on open jobs), open job value (total contract value under construction at once), BAS (the business activity statement GST is reported on). The wider vocabulary lives in the construction glossary.

The natural next articles are cost control, the discipline of holding the four cost numbers current, and construction cash flow, the reference for why builders fail on cash rather than workload.

• ASIC insolvency statistics , the source series for external administrations by industry, updated regularly.
• Australian Taxation Office , for GST attribution on building contracts and BAS reporting obligations.
• Your state or territory building regulator and fair trading body, for the domestic building contract, deposit and progress payment rules in your jurisdiction.