Knowledge · Finance
Construction WIP reporting,
the complete reference.
WIP reporting reconciles, for every unfinished job, how much of the work is genuinely complete against how much has been billed, so the true position shows through. This is the reference for the WIP schedule, the inputs it depends on, the portfolio view owners and accountants actually read, and profit fade, the warning it surfaces first.
01 / Overview
What WIP reporting is
Work in progress reporting is the discipline of reconciling, for every unfinished job, how much of the work is genuinely complete against how much has been billed, so the true position of the business shows through. A residential build runs over months, so at any given moment the money invoiced and the work actually done rarely line up. WIP reporting measures that gap on every open job and tells you which way it points, because the gap is either a liability the business owes or an asset it has earned and not yet collected.
Defined precisely, WIP reporting is not a single number but a schedule, one row per open job, that sets earned revenue against billed to date and reports the over or under billing that falls out. It sits inside the wider cost control discipline, because everything it reports depends on knowing the true cost position of each job first. The applied, plain-English version of this reference, with the working walkthrough, lives in the WIP reporting guide; this page covers the model underneath it and the cluster of articles that carry the detail.
Why it matters
A profitable-looking building business can be carrying losing jobs for months, and a healthy bank balance can be someone else's work paid for in advance. WIP reporting is the report that tells a builder the truth their bank balance is hiding. A job flush with claimed cash can be deep in the red on the work still owed, and only the WIP schedule makes that visible while there is still a job left to steer. Many builders find the same pattern, jobs that read fine on cash and finish at a loss nobody saw coming, and honest WIP is what moves that knowledge forward in time.
02 / The cluster
What WIP depends on, and what this cluster covers
WIP reporting generates almost none of its own data; it borrows all of it. Every row rests on a current forecast final cost, which is itself built from actual costs, committed costs not yet invoiced, and an honest cost to complete on the work still to come. The billed side of the row comes from the progress claims already issued (see progress claims). If any of those inputs is stale or optimistic, the WIP schedule inherits the fault and reports a position that is wrong with confidence.
This hub opens the WIP reporting cluster and four spoke articles carry the detail. The WIP formula explained is the arithmetic, contract value, percentage complete, earned revenue, billed to date and the over or under billing that falls out. Forecast final cost is the denominator every completion percentage is built on, and the input that decides whether the whole schedule is honest. Over billing versus under billing is the two states a job can be in, a liability on one side and an unbilled asset on the other. And profit fade is the warning WIP surfaces earliest, a margin quietly eroding across a build before it reaches the final account. Read them in that order and the schedule below becomes concrete.
03 / The artefact
The WIP schedule, one row per job
Every open job is a row, and the same handful of figures runs across it. The over or under billing at the end is the number the whole schedule exists to produce; everything to its left is what makes that number trustworthy.
Contract value
The current contract sum for the job, original plus approved variations. It is the revenue ceiling the whole row is measured against, and a variation that moved the work but not this number quietly corrupts every figure to its right.
Forecast final cost
What the job is now expected to cost in total, actuals to date plus committed costs not yet invoiced plus an honest price on the work still to come. This is the denominator the percentage complete is built on, and the load-bearing input on the row.
Percentage complete
Cost incurred to date divided by forecast final cost, the cost-to-cost measure most residential builders use. It says how far through the job is, and it is only as honest as the forecast final cost underneath it.
Earned revenue
Contract value multiplied by percentage complete, the revenue the job has genuinely earned by doing the work, regardless of what has been invoiced. This is the number the ledger cannot show you, because the ledger records claims, not completion.
Billed to date
The total progress claimed on the job so far. Straightforward and factual, taken from the claims already issued, and the one figure on the row a builder usually knows without thinking.
Over or under billing
Earned revenue set against billed to date. Billed above earned is over billing, a liability for work still owed; earned above billed is under billing, an asset for work done but not yet claimed. This is the number the whole schedule exists to produce.
The balance sheet and the profit statement, kept general
The over or under billing on each row does not stay on the schedule; it flows into the accounts. Over billing (billed ahead of the work earned) is commonly carried as a liability, cash held for work the business still owes. Under billing (work earned ahead of what has been billed) is commonly carried as an asset, revenue earned and not yet claimed. On the profit side, recognising revenue as the work is earned rather than only as it is billed is what stops a lumpy claim schedule from making profit lurch about between periods. Exactly how these are presented in a given set of accounts is a matter for the builder's accountant, and the note above is general rather than a treatment for any particular job.
Percentage complete is where the judgement lives
Contract value and billed to date are largely factual. The figure that carries the judgement, and therefore the risk, is percentage complete, because it rests on the forecast final cost in its denominator. Understate the forecast final cost and the job looks further along than it is, earned revenue is overstated, and over billing is masked. The arithmetic is trivial; the discipline that makes it trustworthy is keeping the forecast honest, which is why cost to complete sits directly under this schedule.
04 / The roll-up
Why the book matters more than the row
A single job's WIP row is useful to the person running that job, but the reason WIP reporting exists is the roll-up. Owners, accountants, financiers and insurers do not read one job; they read the book, every open job on one schedule, so the whole business shows its true position at once. One job over billed can quietly fund another that is under billed, and a company that looks cash-comfortable can be carrying that comfort as a liability spread across a dozen rows. Only the portfolio view nets those against each other and shows what the business has actually earned.
This is also why WIP is the view outside parties ask for. It is the closest thing a building business has to a truthful statement of where it stands mid-cycle, and it feeds directly into financial visibility, the wider set of numbers a builder has to be able to produce on demand. A builder who can put an honest WIP book in front of a bank or an insurer is having a very different conversation to one who reconstructs it under pressure the night before it is due.
05 / Best practice
How experienced builders keep WIP honest
The operator's observation is that WIP reporting is the report that tells a builder the truth their bank balance is hiding. A job can be flush with claimed cash and deep in the red on the work still owed, and nothing in the ledger or the account balance will say so; only the WIP schedule, earned against billed, makes it visible. The builders who use WIP well treat a comfortable cash position on an open job as a question rather than an answer, because claimed cash on unfinished work is a liability until the work is done.
The second thing they know is where the difficulty actually lives. The WIP arithmetic is trivial, contract value, a percentage, a subtraction, and no builder ever failed for want of the formula. What makes WIP trustworthy is keeping the two inputs honest, the current actual cost and an un-optimistic cost to complete. Every failure mode below traces back to one of those two, an invoice left uncaptured or a forecast quietly holding at budget, and a builder who protects those two inputs has already solved ninety per cent of WIP. The report cannot be more honest than the numbers fed into it.
Where software fits the workflow
Traditionally the WIP book is a workbook stitched together by hand each month, actuals pulled from the ledger, claims from the claim file, completion estimated from memory, and it is stale by the time it is finished. In VIABUILD the inputs stay current in one place. The won estimate becomes the budget line by line, purchase orders draw down committed cost as they are raised, and Oryn™ reads and codes supplier invoices as they arrive so actual cost is live, which keeps the cost tracking and the forecast final cost behind every WIP row current rather than reconstructed. The builder still makes every call and still judges the cost to complete; what disappears is the reconstruction work before each one.
06 / The warning
Profit fade, the single most important thing WIP surfaces early
The most valuable thing a WIP schedule does is surface profit fade before the final account does. Profit fade is the slow erosion of a job's margin across the build, rarely one dramatic event and usually a dozen small drifts, an unpriced variation here, a package landing over allowance there, each one absorbed quietly by a forecast final cost that was never challenged. Watched row by row across successive WIP reports, the fade shows as a margin that thins a little each period, and that trend is visible long before the loss lands. The dedicated node, profit fade, covers how to read the pattern.
The danger is that fade hides inside the same input WIP most depends on. When the cost to complete drifts back to budget, the forecast final cost holds flat, the margin looks intact, and the fade is invisible until the orders are raised and reality arrives at once. On short residential jobs this often finishes before the loss is visible, and the builder then tenders the next job from the same optimistic numbers. That is how a business loses money on volume, job after job, with every WIP report looking survivable, and it is why the honesty of the forecast under the schedule matters more than any refinement of the schedule itself.
07 / Australian considerations
Revenue recognition, insolvency and the Australian context
WIP reporting is an internal management discipline, but it sits against an accounting standard and inside a hard market. The points below are labelled by evidence class; accounting treatment is a matter for your accountant and statistics are point-in-time, so confirm current sources before relying on any of them.
- Australian Standards. For contracts that run across a reporting period, revenue is commonly recognised over time using a percentage-of-completion approach rather than only when the job finishes, and in Australia the standard governing revenue from contracts is AASB 15 Revenue from Contracts with Customers. The WIP schedule is the working document that feeds that recognition. This is described at the mechanism level only; how the standard applies to a particular business, and the exact treatment, is a matter for the builder's accountant, so confirm it with them rather than relying on a web page.
- Common practice. Accountants, financiers and insurers increasingly ask residential builders for a WIP schedule, and several state eligibility regimes for home warranty insurance look at job profitability. A WIP figure is only as honest as the forecast final cost beneath it, which puts this cluster directly underneath those conversations.
- Government statistics. ASIC insolvency data showed a record 3,596 Australian construction companies entering external administration for the first time in FY 2024-25, up 21 per cent on the prior year, with construction topping the industry count. The figure is point-in-time; confirm against current ASIC statistics before quoting it. The pattern behind it is steadier, that building businesses rarely fail for lack of work and commonly fail on cash and on jobs whose losses were discovered late, which is exactly what an honest WIP report is meant to catch.
- Industry best practice. Across recent cycles, the builders who came through downturns best were not those with the most work but those who kept cost-to-complete estimates current and documented variations rigorously, which is the discipline that keeps a WIP book trustworthy. See building through a downturn.
08 / Common mistakes
Where WIP schedules go wrong
Each of these is mechanical and recognisable, and almost every one traces back to a stale actual cost or an optimistic cost to complete. A wrong WIP schedule is worse than none, because it gets believed.
Percentage complete guessed
A completion figure set by gut feel rather than tied to cost incurred against forecast final cost produces a WIP schedule nobody trusts. The guess almost always flatters the job, because the person estimating it wants the job to be ahead.
Forecast final cost left at budget
When the cost to complete drifts back to budget, the percentage complete reads too low and the over billing looks larger than it is. The schedule reports a healthy cash cushion that is really an unpriced overrun waiting downstream.
Stale actual cost
Invoices sitting in a drawer for weeks mean cost incurred is understated, so percentage complete is understated, so earned revenue is understated. Every figure on the row inherits the lag, and the schedule describes last month.
Over billing read as profit
Cash from claiming ahead of the work looks like a healthy job right up until the work still has to be done. A row flush with billed cash can be the row deepest in the red on the cost still owed.
Under billing left uncollected
Work completed but not yet claimed is revenue earned and cash not collected, and it is easy to miss because nothing chases you for it. The schedule surfaces it; a builder who does not read the schedule funds it out of pocket.
Only produced at year end
A WIP schedule assembled once, for the accountant, describes jobs that have long since moved on. Its value as an early warning is spent entirely; it becomes a compliance artefact rather than a management one.
09 / Practical example
A worked WIP row, the same job read two ways
Illustrative only, not a benchmark. A job is contracted at $800,000. Cost incurred to date is $450,000, and billed to date is $520,000. Run the row with an optimistic forecast final cost of $700,000, and the job reads about 64 per cent complete ($450,000 of $700,000), earning roughly $514,000 of revenue against $520,000 billed. That is a small over billing of about $6,000, unremarkable, and the row looks healthy.
Now run the same row with an honest forecast final cost. The cabinetry is not yet ordered and current quotes run over allowance, a drainage instruction proceeded unpriced, and the forecast final cost is really $780,000. The job is now about 58 per cent complete ($450,000 of $780,000), earning roughly $462,000 against the same $520,000 billed, an over billing of about $58,000. That surplus is not profit; it is a liability, cash claimed for work not yet done, on a job whose margin has faded from $100,000 to $20,000. Same claims, same actuals, one honest input, and a completely different picture of the business. The builder who reads the second version has time to price the drainage, requote the cabinetry and stop billing ahead; the builder who trusts the first finds out at the final account.
10 / FAQ
Common questions.
Job cost reporting looks down into a single job, budget against committed against actual against forecast, so the person running that job can act on the lines that moved. WIP reporting looks across the book and asks a different question, for every open job, how does the revenue earned by the work done compare to the revenue already billed. The two share inputs (both rest on a current forecast final cost) but answer to different readers, the supervisor on one and the owner, accountant and financier on the other.
The measure most residential builders use is cost to cost, cost incurred to date divided by the forecast final cost. If a job has incurred $600,000 of a forecast $800,000, it is judged 75 per cent complete. The method is only as honest as the forecast final cost in the denominator, which is why an optimistic cost to complete quietly inflates completion and earned revenue together. Some builders tie completion to physical stage milestones instead, which resists optimism but handles part-finished stages less cleanly. The arithmetic in full is covered in the WIP formula node linked below.
No, and reading it that way is the trap. Over billing means only that a job has claimed more revenue than the work done has earned, so the surplus cash is a liability against work still owed, not margin. A job can be substantially over billed and still be losing money if its forecast final cost has crept above its contract value. Over and under billing describe the timing of cash against work; whether the job makes money is a separate question answered by contract value against forecast final cost.
For long jobs that run across a reporting period, revenue is commonly recognised over time using a percentage-of-completion approach rather than only when the job finishes, and in Australia the standard that governs revenue from contracts is AASB 15 Revenue from Contracts with Customers. The WIP schedule is the working document that feeds that recognition, because earned revenue against billed to date is what the accounts adjust for. How the standard applies to a particular business, and the exact treatment, is a matter for the builder’s accountant, and this page describes the mechanism generally rather than asserting how any given job should be recognised. Confirm the treatment with your accountant.
Because it is the only view that shows a building business as it really stands rather than as its bank balance suggests. Accounts, financiers and insurers read the WIP book to judge whether reported profit is earned or merely billed ahead, and several home warranty insurance eligibility regimes look at job profitability. A WIP figure is only as honest as the forecast final cost beneath it, which is why the discipline that keeps that input current sits directly underneath these conversations.
Common practice among builders who use it as a management tool rather than a year-end chore is monthly at minimum, refreshed at every progress claim, because a claim asserts a percentage of completion and that assertion is only as good as the cost figures under it. Builders who find a monthly WIP a heavy exercise almost always have a data currency problem rather than a reporting one, since the schedule is simple arithmetic once the actuals and the forecast are current.
11 / Terms
Glossary for this topic
WIP (work in progress, the accounting view of open jobs), WIP schedule (one row per job setting earned revenue against billed to date), contract value (the current contract sum with approved variations), forecast final cost (actuals plus committed plus cost to complete), percentage complete (cost incurred divided by forecast final cost), earned revenue (contract value times percentage complete), billed to date (total progress claimed so far), over billing (billed above earned, a liability), under billing (earned above billed, an asset), profit fade (margin eroding across a build). The wider vocabulary lives in the construction glossary.
The natural next article is the WIP formula explained, the arithmetic that turns the inputs on this page into the over or under billing on every row.
12 / Keep reading
Related knowledge, guides and features
13 / Further reading
Primary sources
- Australian Accounting Standards Board , publisher of AASB 15 Revenue from Contracts with Customers, the standard that governs revenue recognition on long-term contracts. Read alongside your accountant.
- ASIC insolvency statistics , the source series for external administrations by industry, updated regularly.
- Your accountant, for how revenue recognition, WIP presentation and the treatment of over and under billing apply to your business structure.
See the position your bank balance is hiding.
VIABUILD keeps the actual cost and forecast behind every WIP row current, so the schedule reflects what each job has really earned rather than what it has billed, with the builder making every call.