Your P&L Can Look Fine While Jobs Are Going Sideways
A contractor can have a profitable income statement and still be in trouble. That is not a contradiction.
Construction accounting is full of timing differences. You buy material before it is installed. You bill ahead on one project and fall behind on another. Payroll hits every week while owner approvals take thirty days. Change orders sit in limbo. Cost estimates change as the field learns more.
A standard profit and loss statement cannot explain all of that by itself. That is why a work-in-progress schedule, or WIP schedule, is one of the most useful reports a general contractor can review.
- A good WIP schedule answers four questions:
- How much profit did we expect to make?
- How much profit have we earned so far?
- Are we billed ahead or behind the work?
- Is the expected final margin getting better or worse?
If your company runs multi-month projects and you are not reviewing WIP, you are probably discovering job problems later than you should.
What Is a Construction WIP Schedule?
A WIP schedule is a job-by-job summary of active contracts.
It typically includes:
- Original contract value
- Approved change orders
- Revised contract value
- Estimated total cost
- Cost incurred to date
- Estimated cost to complete
- Estimated gross profit
- Percent complete
- Earned revenue
- Billings to date
- Overbilling or underbilling
The schedule connects the project-management view of the job with the accounting view. That connection matters because construction profit is not simply “invoice minus bills paid this month.”
A project can be 60% complete but 75% billed. Another can be 60% complete but only 45% billed. Those two jobs may show the same contract value and cost budget while creating very different cash and accounting results.
The Simple WIP Framework: Contract, Cost, Completion, Cash
Use four C’s to review every active job.
Contract
What are we entitled to bill? Start with the original contract and approved change orders. Keep pending change orders separate. If the field performed extra work but the change is not approved, do not pretend it is already part of the signed contract value.
Cost
What do we expect the job to cost when it is finished? This is the heart of the WIP schedule. Actual cost to date matters, but estimated cost to complete matters just as much. If a project manager knows another $200,000 of labor and material is coming, the WIP needs to reflect it now.
Completion
How much of the job has actually been earned? A common internal approach compares cost incurred to estimated total cost. If a project has incurred 50% of its expected cost, that can be one indicator of 50% completion, subject to the company’s accounting method and project facts.
Cash
How much have we billed and collected compared with the work earned? This is where overbilling, underbilling, and collection risk become visible. The framework is simple enough for a project manager to use and strong enough to drive a serious monthly financial review.
Overbilling Is Not Automatically Bad
Contractors often hear the word overbilling and assume it means something improper. Not necessarily.
On a WIP schedule, overbilling generally means billings to date exceed revenue earned under the accounting model.
From a cash perspective, being reasonably ahead can be healthy. Customer cash helps fund labor, material, and subcontractors rather than forcing the contractor to finance the project. The danger is spending overbilled cash as if it were earned profit.
If you are billed $150,000 ahead of earned revenue, part of that cash supports work you still owe. That is why an owner can have a strong bank balance and still have a large future cost obligation. Overbilling can support working capital. It is not free money.
Underbilling Is a Warning Sign
Underbilling means earned revenue is ahead of billings. Sometimes there is a reasonable explanation. The billing cutoff may fall before month-end. An owner may require a specific approval. A milestone may be close but not reached. But persistent underbilling needs attention.
Common causes include:
- Late pay applications
- Unapproved change orders
- Missing schedule-of-values items
- Project managers not communicating progress
- Billing disputes
- Front-loaded project costs
- Bad estimates that make the percentage-complete calculation misleading
Underbilling often means the contractor is financing the customer.
If the WIP shows a large underbilling, ask why and assign an action. Do not let it become a permanent balance-sheet account.
The Most Important Number Is Estimated Cost to Complete
Owners love actual numbers because actual numbers feel certain. But the most important WIP number is often an estimate: cost to complete.
Imagine a $2 million project with an original cost budget of $1.6 million. That implies $400,000 of expected gross profit. Halfway through the job, actual cost is $900,000.
If the remaining work is still expected to cost $700,000, the original profit may hold.
If the project manager now believes the remaining work will cost $950,000, projected final cost becomes $1.85 million and expected gross profit drops to $150,000. That is margin fade. The accounting should show it when the estimate changes, not when the final invoice arrives.
A WIP meeting without honest cost-to-complete estimates is just a spreadsheet meeting.
Watch Margin Fade by Job
Margin fade means the expected gross profit percentage declines as the project progresses.
One job with fade may be normal. Repeated fade is a business model problem.
It may point to:
- Poor estimating
- Missed labor burden
- Weak subcontractor buyout
- Uncontrolled change work
- Material escalation
- Schedule delays
- Rework
- Bad project management
- A habit of bidding too aggressively
Track original estimated gross profit against current estimated gross profit every month. Then look for patterns.
If every project manager loses three margin points, the problem may be company-wide. If one project type consistently fades, estimating may need a different production assumption. If certain owners create repeated unapproved changes, contract administration needs attention. WIP turns individual job stories into management data.
California General Contractor Example
Assume a California GC does $18 million in annual revenue. The monthly P&L shows a healthy gross profit. Cash is decent. The owner feels comfortable. Then the company builds its first real WIP schedule.
Three things appear.
One job is $400,000 underbilled because several change orders are pending. Another is $300,000 overbilled, which explains why the bank balance looks stronger than the company’s earned profit. A third project originally expected a 16% gross margin but now projects 9% because subcontractor cost and supervision are running over.
None of those facts were obvious from the P&L. Now management has decisions to make.
Push change-order approvals. Protect the overbilled cash. Update the forecast. Meet with the project manager on the fading job. Adjust future estimates. That is what a useful report should do.
How to Run a Monthly WIP Meeting
Keep the meeting operational. For every material active job, ask:
- Has the contract value changed?
- Are all approved change orders recorded?
- What pending change orders are likely but not approved?
- Is cost to date complete through the cutoff?
- What is the best current estimate of cost to complete?
- Has projected gross profit changed since last month?
- Are we overbilled or underbilled?
- Is any receivable disputed or slow?
- What cash is expected in the next four weeks?
- What management action is required?
Do not spend the whole meeting debating pennies. Focus on changed estimates, large billing gaps, margin fade, and cash risk.
Five WIP Mistakes Contractors Make
Using stale cost estimates
If estimated total cost never changes, the WIP is not reflecting field reality.
Including unapproved change orders as guaranteed revenue
That can make a weak job look healthier than it is.
Ignoring committed cost
Open subcontracts and purchase orders can matter even before the invoice hits the ledger.
Reviewing WIP only at year-end
By then the management value is mostly gone.
Letting accounting own the estimate
Accounting can build the report. Project managers need to own job forecasts because they know what remains in the field.
WIP Is Also a Cash-Flow Tool
A WIP schedule becomes more powerful when connected to receivables and cash forecasting.
- An underbilled project may need an immediate pay application.
- An overbilled project may require protecting cash for future production.
- A fading-margin job may consume more working capital than expected.
- A nearly complete job with large retainage may need closeout attention.
This is why WIP belongs in the owner’s financial meeting, not buried in the accounting department. It connects profit to cash.
What a Good WIP Schedule Should Tell You in Five Minutes
When you open the report, you should quickly see:
- Which jobs are largest.
- Which jobs have the highest and lowest projected margins.
- Which jobs are fading.
- Which jobs are materially overbilled or underbilled.
- Which jobs have large unapproved changes.
- Which jobs are near completion but still holding receivables or retainage.
- Which project managers need attention.
If the report needs an hour of explanation before it becomes useful, simplify it.
Bottom Line
A construction company does not really know its profit just because the P&L says it made money this month. The owner needs to understand the active jobs underneath that number. A WIP schedule gives you that view.
It exposes billing gaps, protects overbilled cash, catches margin fade, improves forecasts, and forces project managers and accounting to agree on where each job really stands.
If you run long projects, make WIP part of the monthly operating rhythm. Do not wait until the year-end CPA asks for it.
Frequently Asked Questions
What does WIP mean in construction? WIP means work in progress. A construction WIP schedule summarizes active jobs and compares contract value, estimated cost, cost to date, earned revenue, billings, and projected profit.
What is overbilling on a WIP schedule? Overbilling generally means billings to date are greater than revenue earned under the WIP calculation. It can help working capital, but the excess billing is not the same as earned profit.
What is underbilling? Underbilling generally means earned revenue exceeds billings to date. It can indicate late billing, pending change orders, front-loaded costs, or another project-management issue that deserves review.
How often should contractors update WIP? Monthly is a strong baseline for most established contractors. Large, fast-moving, or troubled projects may need more frequent cost-to-complete and cash review.
Who should own the WIP schedule? Accounting should maintain the financial structure, but project managers need to own contract changes and cost-to-complete estimates. The owner or CFO should challenge major changes and use the report for decisions.
Book a Call
Before you trust the monthly P&L, look underneath it.
At Basta & Company, we help California contractors build WIP, job-costing, and cash-flow reporting that shows where profit is being earned and where it is leaking.
Book a call and get a second opinion before a fading job becomes a year-end surprise.
