Overbilling is when the amount billed on a construction contract is more than the revenue earned based on percentage of completion. On the balance sheet it shows up as a liability called billings in excess of costs and estimated earnings.
Review invoices, committed costs, and cash timing together before making project decisions. AI-generated illustration.
Overbilling means you have billed the customer for more work than you have actually earned. It is not necessarily fraud or bad faith. It is an accounting measurement that comes from comparing billings to date with earned revenue to date on the WIP report. When billings are ahead, the job is overbilled. When they are behind, it is underbilled.
Under the percentage of completion method, earned revenue is the contract value times the percent complete. Overbilling is the difference when billings to date are higher than that number.
How to calculate overbilling
Percent complete = cost to date divided by total estimated cost.
Earned revenue = contract value times percent complete.
Over or under billing = billings to date minus earned revenue. Positive is overbilled; negative is underbilled.
Example: overbilled job on a WIP report
Line
Amount
Contract value
$1,000,000
Total estimated cost
$850,000
Cost to date
$340,000
Percent complete
40%
Earned revenue (40% of $1,000,000)
$400,000
Billed to date
$460,000
Overbilled
$60,000
That $60,000 is cash the contractor has collected (or will) for work it has not done yet. It is recorded as a current liability, because the company owes the customer that much work.
Why overbilling happens
Front-loaded schedule of values. Early line items such as mobilization or general conditions are priced high, so the first pay apps bill faster than costs come in. See front-loading.
Deposits and stored materials. Billing for material ordered but not yet installed or not yet costed.
Optimistic progress. The PM bills 50 percent on a line that is really 35 percent done.
Estimate problems. If the estimated total cost is too low, percent complete looks high and the overbilling looks smaller than it is. Fix the cost to complete first.
Why it matters
A moderate overbilling position is often seen as healthy cash management, since the customer's money is funding the work. Sureties and lenders watch it closely, though. The danger is spending the overbilled cash on overhead, equipment, or another job's losses. When the job reaches the end, the remaining work still has to be paid for and there is no billing left to cover it. That is how a company that looked cash rich ends up short on its last three jobs at once.
Common mistakes
Treating overbilled cash as profit and distributing it.
Ignoring overbilling on a job whose estimate is out of date, which hides a loss.
Netting overbilled and underbilled jobs into one number so neither problem is visible.
Not reviewing the WIP monthly. Overbilling changes every billing cycle.
A quick gut check helps. If a job is overbilled, ask whether the cash it produced is still in the bank. Add up overbillings across all open jobs and compare that total with cash on hand. If cash is lower, the company has already spent money it will need to finish work, and the shortfall will show up later as a cash crunch on jobs that look fine on paper.
No. In accounting terms it only means billings are ahead of earned revenue. Billing for work that was not performed in violation of the contract is a different issue.
Where does overbilling show on financial statements?+
As a current liability, usually labeled billings in excess of costs and estimated earnings.
Is overbilling good or bad?+
Some overbilling can help cash flow. Large or growing overbillings, especially if the cash has been spent, can signal trouble when the job winds down.
How do I fix an overbilled job?+
Make sure the cost estimate is current, bill only for real progress going forward, and keep enough cash on hand to finish the work you have already been paid for.
A job can be overbilled, cash-positive, and still be moving toward a weaker result. This briefing uses a documented $2 million WIP example to show how a six-point margin fade can hide behind $184,000 of overbilling—and maps the field-to-finance workflow needed to surface that warning early.
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Read the full episode transcript
Published transcript from Scaling Legends. It may contain transcription errors. View the source transcript.
You have a job that is currently overbilled by $184 ,000. Okay. It is bringing in strong cash. I mean, the bank account looks incredibly healthy. Right. But on that very same job, the actual profit margin has silently plummeted from 20 % down to 14%. Yeah. And the consequence here is, well... Your leadership team looks at the bank balance and thinks this project is a resounding success. Right, because the cash is there. Yeah, the cash is there, while the underlying economics of the deal are actively failing. Yeah, that is a dangerous place to be. It really is. So this is an AI -assisted Sailing Legends decision briefing. It's produced by Smart Business Automator from the cited sources in our show notes. And Smart Business Automator, they design AI and
automation systems for construction companies. Right. And before we dive into the data today, please note that this briefing is for educational and informational purposes only. Yeah, not legal or financial advice. Right. Not professional advice. You should always consult your CPA. for your specific circumstances. So our mission today, we are going to look at the work in progress or the WIP report. The famous WIP report. Yeah, but not just as a historical financial document. We need to look at it as an operational warning system. I like that. I mean, think of it like driving a heavy duty truck. You glance at the dashboard and the fuel gauge shows a full tank. Okay. That full tank is your overbilling. It's your positive cash flow. Right. But what you can't see from the driver's seat is this hidden
leak in the fuel line. Oh, man. And that leak is your margin fade. So you were going to run out of gas long before you reached the destination. Yeah, you'll be stranded on the highway. Stranded, yeah. All because the dashboard told you everything was fine. That fuel leak analogy, I mean, it really captures the visceral disconnect between cash and true profitability. Because to understand how a margin fade hides so effectively behind positive cash flow, we have to trace the actual deal math. It's remarkably easy to get lulled into this false sense of security. and the checks are clearing, and the working capital is flush. Well, so if I'm auditing this tomorrow, I don't want to chase ghosts. Right, you need specifics. Give you the specific smoke signals. I want to look at the mechanics of a verified scenario.
Okay, let's do it. So this breakdown, it comes from the Construction Financial Management Association, or CFMA. Right. In their July 6, 2026 guide. Okay, $2 million. The original estimated cost to complete this job was $1 .6 million. Got it. So that gives us an original estimated margin of 20%. But then the reality of the muddy job site hits the clean spreadsheet. It always does. Fast forward a bit, and the actual costs incurred to date are $960 ,000. Okay. However, the revised estimated total cost has jumped. It went from $1 .6 million up to $1 .72 million. Okay. Yeah, so hold on. Let me make sure I'm following the specific cost -to -cost mechanics here. Yeah, let's break that down. If we take the $960 ,000
incurred and divide it by the new $1 .72 million total expected cost, what does that give us? So you get a percent complete of 55 .8%. Okay, so we take that 55 .8 % and apply it to our $2 million contract price. Right. So they have actually billed $1 .3 million to date. And that right there, that is where the trap snaps shut. Wait, really? Okay, so doing the subtraction here. $1 .3 million build minus the earned revenue of $1 ,116 ,000. That leaves us with a billing position that is $184 ,000 overbilled. Spot on. So play devil advocate for me here. The cash is flowing in. The customer is paying ahead of the work. Why is this a crisis? It's a crisis
because of the profit calculation you're missing. I mean, remember that new total cost estimate of $1 .72 million? Right. It went up. Yeah. So subtract that $1 .72 million from your $2 million contract. What? Your total profit. is now only $280 ,000. Oh, wow. Yeah, that brings the current margin down to 14%. Wow. So a full six -point margin fade has occurred right under the nose of strong cash flow. Just hiding there. Yeah. And overbilling itself is not a bad thing. In fact, it's a strategic way to support working capital. Sure, you want the cash. You want to use the project's cash, not your own reserves, to fund the ongoing work. That makes sense. But the systemic danger is treating that cash as evidence that the job economics are healthy.
Right. Especially when the current cost estimate is screaming otherwise. Which, I mean, that brings up an obvious friction point. What's that? The math we just did is basic division and subtraction. Yeah, it's not calculus. No, so why does this specific trap catch highly seasoned project executives and CFOs by surprise? at the end of the month? It's a great question. I mean, these are intelligent people who look at numbers all day long. We miss the math because of where the data lives and how it travels from the job site to the CFO's desk. Ah, okay. The calculation is simple, yes, but the data collection process is deeply flawed. Got it. We really have to look at the human behavior driving the workflow. Which is funny you say that. A WIP report is supposed to be a structured conversation between the field and the office.
A conversation, yes. It's not supposed to be just a static accounting artifact. Right. The decision makers who actually own this problem are the CFO, the controller, the owner, the project executive, and the operations leader. That's a lot of people who need to be on the same page. Yeah. They need this to be a living dialogue. But in reality, that dialogue is completely fragmented. I mean, let's map the broken failure chain that a lot of companies are operating with right now. Okay. Lay it out for me. Picture this. It's 4 p .m. on a Friday. Oh, no. Yeah. The WIP review meeting is already 20 minutes over time. Everyone wants to go home. Yep. The project manager says they are 80 % done, but accounting says they've spent 95 % of the budget. Oh, boy. Now everyone is just staring at a spreadsheet arguing over who typed the wrong number. I can feel the blood
pressure rising in the room just hearing that scenario. It happens every month. And it happens because the crucial field information arrives in unstructured formats. Like what? You know, daily reports, text messages, quick phone calls from the truck, long email threads. Right. None of that flows naturally into a financial system. No, it's just a mess of data. And then look at the actual uncommitted costs. Those are siloed over in the accounting or purchasing departments. Completely separate. Yeah. Meanwhile, pending changes, which... I mean, are the lifeblood of profitability on a complex job? Oh yeah, change orders are huge. They sit in a completely separate log. Or, even worse, in a project manager's inbox
waiting for a signature from the owner. And we can't ignore the psychology here either. What do you mean? Well, project managers are updating their costs to complete on different dates throughout the month, using varying assumptions. That is so true. Like, one PM might factor in a looming material price escalation, while another just carries the original budget forward because they were rushed. Yeah, they just want to get back out into the field. Right, or maybe they're just delaying. Delivering bad news. Which leaves the controller at the end of the month playing the role of a forensic investigator. That sounds awful. It is. They are left to manually stitch together a monthly WIP spreadsheet by pulling from all these disconnected silos. So they're just chasing people down. Yeah. The result is that leadership meetings devolve into arguments over data integrity rather than taking decisive
action on the actual margin fade. So putting a shiny software dashboard over this broken process? does not fix it. Not at all. It only creates a polished, highly unreliable forecast. Right. Garbage in, garbage out. Yeah. The report is late because the workflow is fragmented. Automating a final dashboard without fixing those underlying handoffs will just make a bad forecast look pretty. Okay. So since spreadsheets and fragmented ERP systems cause these late warnings, we clearly need a different approach. We do. How do we engineer a system that surfaces that $184 ,000 trap? Instantly? Yeah. Like before the end of month meeting even happens? Well, we have to build a functioning WIP automation workflow. Okay. And this requires a specific blueprint. First, we need to standardize the inputs. Which inputs? The system must automatically
pull the original estimate, the current contract value, the actual and committed costs by job and cost code. Okay. Plus the build -to -date figures, the pending change value, schedule progress, and critically, the prior period WIP values. So we are bringing all the disparate silos into one central rules engine. Yes. And that rules engine is where the analytical heavy lifting happens. How so? Well... A standard system might rank exceptions by gross profit percent. Right. But a smart rules engine ranks exceptions by projected gross profit dollars. Oh, that is a subtle but vital distinction. It really is. Because a 2 % fade on a $10 million job is a much bigger crisis than a 5 % fade on a $50 ,000 job. Yes,
exactly. I mean, you want to prioritize the actual cash impact to the business, not just a ratio. Right. So what other... rules need to be in place? The engine needs to require an explanation when a value crosses a specific company -defined tolerance. And here is a critical control. It must prevent pending changes from entering the contract value until their treatment is formally approved by the company's accounting and contract process. Oh, because you can't recognize revenue on hope. You really can't. It'll sink you. So once the rules engine identifies a variance, what does the automated action look like? The system must automatically route these exceptions directly to the project manager and the project executive. Fucking alert? Yeah, but it can't just send a generic alert. It must specifically ask for the
cost code driver, the cause of the variance, the corrective action plan, the owner of that plan, and a firm... due date. That's a lot of accountability. It has to be. At the same time, it must notify finance if this margin movement creates a cash exposure, just like we saw in our opening example. Okay, I have a strategic question here, looking at this from the operations side. Sure, go ahead. What stops a project manager from just typing weather delay every single month to clear the alert? and get back to work. Oh, the old weather delay. Right. I mean, we all know that is the industry's favorite get out of jail free card. It really is. And that is the Achilles heel of most reporting workflows. So how do you fix it? The solution is memory. Memory. Yeah. The automated system must retain
the previous month's explanation and forecast version and display it during the next review. Oh, I see. It must explicitly show leadership whether that prior corrective action actually improved the situation, stabilized it, or worsened the projection in the current period. Oh, wow. So you can't just say weather delay three months in a row. Right. Accountability is built into the workflow, making it impossible to hide behind a recurring excuse. That's powerful. So armed with an understanding of what a healthy system looks like, we need concrete ways for leaders to audit their current reality this week. Yes. Action items. The sources highlight three specific red flag combinations. And we need to be very clear on this point. What's up? Do not present these as universal proof of a loss. They are
triggers for a thorough review. Right. They're starting points. Walk us through the first combination. Flag number one is overbilling plus margin fade. This is our opening scenario. Yep. The fuel leak. Right. The cash is ahead while the projected economics are deteriorating. That's the classic false positive. Yes, it is. Flag number two is growing underbilling coupled with pending changes. Ooh, that's a bad one. Yeah. In this scenario, the contractor is essentially acting as a zero interest bank. Basically. They are funding the work out of pocket while the approval and billing processes lag behind. And that is a severe cash flow drain that can cripple a growing company if left unchecked. I can imagine. It means the physical work is happening, but the paperwork is stalled and you are just bleeding capital.
Right. And flag number three. Okay. The percent complete rises while the estimate to complete does not change. I like to think of this as a broken thermometer. That's a good way to put it. A stable forecast might actually just be a stale forecast that no one is updating based on field reality. Yeah, no one is actually checking the numbers. Right. The project is advancing. Money is going out the door. The schedule is progressing. But the financial projection is sitting in a freezer from three months ago. Those three triggers are really powerful indicators. Yeah, they are. To operationalize this, we need three concrete actions the listener can take immediately. Okay, what's action one? Action one. Select the top five active jobs with the largest remaining cost. Just five. Yeah. Do not
try to boil the ocean and look at everything. Just focus on those top five. Makes sense. Compare their original margin, current margin, and prior period margin. Okay. And when they find a material discrepancy during that comparison. That leads to action two. Right. For every material change you find, you must hunt down the exact cost code, the field evidence, the pending change status, and the responsible recovery action. No vague summaries. Right. Do not accept a vague summary from the team. Track it down to the root cause. Action 3 is fascinating because it focuses on the internal cost of the broken workflow itself. Yes. It is a time audit. A time audit, yeah. Physically, time, how long it takes your finance team to assemble a supportable current forecast. Just sit there with a stopwatch. Basically, record
every single spreadsheet involved, every inbox check, every manual reentry, and every chase down approval. Wow, that's going to be a big number. The friction in this process is often shocking when you quantify it, which is the root cause of why the data is always weeks behind reality. But you know, once you start auditing and speeding up this process... Okay, so keep the AI out of the final call. Right. Automation
is highly effective at collecting data, calculating variances, comparing periods, routing alerts, and preserving evidence. It's a logistics engine. Exactly. Yeah, it is a logistics engine for information. The Financial Accounting Standards Board, or FASB. has very clear rules here. They sure do. Under topic 606, which governs revenue from contracts with customers, there are guidelines addressing the nature, timing, and uncertainty of revenue. And we are not offering an accounting conclusion here. But the principle is clear. The automation cannot make these nuanced calls. No, it can't. The workflow must route revenue recognition and contract modification judgments to the contractor's qualified accounting professionals. Human judgment remains the final gate always yeah the system
tees up the problem with all the supporting evidence but a qualified person must approve the forecast changes and the accounting treatment you're just speeding up the prep work yeah you automate the friction of gathering the data not the financial judgment itself got it you still need human experts evaluating whether a recovery plan is credible or whether an issue requires communication with a surety, a lender, or the customer. This brings us to the ultimate directive for your next WIP meeting. The big takeaway. The decision -maker move. So here's what you do. Sit down with the team. If they cannot clearly explain a margin movement, and if they cannot produce the supporting inputs... Like the field evidence and cost codes. Right, the real evidence. If they can't produce that, then you must physically mark that line
item as... And verified. Wow. Just unverified right on the sheet. Do not accept a guess. Assign a specific owner to track down the truth and set a hard deadline before the next WIP meeting adjourns. Because a forecast built on unverified assumptions is just a liability. 100%. Yeah. Now, if you are the CFO, controller, owner, or project executive of a construction company, and your WIP review still depends on spreadsheet chasing and late explanations, smart... So as you review those top five jobs this week, I want to leave you with one final question to ponder.
Okay, what is it? If your system cannot tell you the difference between a project that is truly profitable and a project that is simply cashing in early, who is really running the business, you or the calendar?
