Contractor WIP Series: Revenue Recognition - Billing Is Not the Same as Earning
Contractors do not need another accounting report they cannot use.
They need to know what they earned, what it cost to earn it, where each project is headed, and whether today’s cash is masking tomorrow’s problem.
That is what a properly prepared work-in-process schedule can reveal.
This five-part series breaks down WIP accounting in practical terms, from revenue recognition and overbillings to cost allocation and the mistakes that distort job margins.
Part Two.
One of the most common misconceptions in construction accounting is simple:
“We invoiced it, so it must be revenue.”
Not necessarily.
Billings reflect what the contract allows the contractor to invoice. Revenue reflects the value of the work performed under the applicable revenue-recognition method.
Those amounts rarely move in perfect alignment.
The input-to-input method
For many construction contracts, progress is measured using an input method based on costs incurred relative to expected total costs. This is commonly called the cost-to-cost method.
Consider a $2 million contract with estimated total costs of $1.6 million.
At the end of the reporting period:
Costs incurred to date: $640,000
Estimated total costs: $1,600,000
Percentage complete: $640,000 / $1,600,000 = 40% complete
Revenue earned to date: $2,000,000 X 40% complete = $800,000 earned to date
Gross profit earned to date: $160,000
If the contractor has billed $950,000, it has not necessarily earned $950,000 of revenue. It has earned approximately $800,000 based on the project’s measured progress.
The $150,000 difference is generally an overbilling, presented as a contract liability.
Why invoice based accounting distorts results
If revenue is recorded solely from invoices, reported profitability may depend more on billing timing than project performance.
That creates misleading results:
Front-loaded billings can inflate early period revenue and profit.
Delayed change order billing can understate earned revenue.
Retainage can create confusion between amounts earned, billed, and collectible.
Billing milestones may not correspond to actual construction progress.
Year-end results can swing based on when invoices happen to be issued.
Revenue recognition is intended to reflect performance, not paperwork timing.
The Estimate Drives the Answer
A cost-to-cost calculation is only as reliable as the estimated cost to complete.
If the estimate excludes known subcontractor costs, labor overruns, materials, equipment, warranty exposure, or other remaining obligations, the project may appear further along than it really is. That accelerates revenue and profit prematurely.
A WIP schedule is therefore not just an accounting calculation. It is an operating forecast.
Project managers, estimators, operations leaders, and accounting personnel all have information needed to make it reliable.
The best WIP meetings do not begin with, “Does the spreadsheet add up?”
They begin with:
“What do we now know about this project that we did not know last month?”
Let’s Connect
Is your WIP schedule helping you operate, or is it only being updated for year-end reporting?
Bilotta & Company’s Contractor Compass® helps construction companies connect job costing, WIP, cash flow, forecasting, and financial reporting into one consistent operating rhythm.
Close → Analyze → Forecast → Decide.