Contractor Finance Glossary
What is Overbilling and Underbilling?
Definition reviewed .
Also called: over and under billing, billings in excess of costs and estimated earnings, costs and estimated earnings in excess of billings
Overbilling means cumulative billings exceed revenue earned to date; underbilling means earned revenue exceeds billings. The WIP position is billings minus revenue earned under the applicable progress method. Underbilling can reflect unbilled work, a billing restriction or a stale cost estimate.
Traditional captions are billings in excess of costs and estimated earnings, and costs and estimated earnings in excess of billings. They compare billings with recognized revenue, not with cost alone. Contract asset/liability presentation depends on applicable revenue guidance and rights to payment. Overbilling does not prove the invoice has been paid.
Underbilling can mean work earned but not billed, a contractual restriction, pending change approval or a stale cost-to-complete estimate. Refresh estimates and inspect profit fade before assuming more cash is billable. A WIP schedule, invoice aging and actual receipts together expose the cash position.
How it is calculated
For the applicable revenue method, signed over/under position = cumulative billings minus cumulative earned revenue. Positive means billings exceed revenue; negative means revenue exceeds billings. Check transaction price, progress adjustments, remaining costs and enforceable billing rights before acting.
Want these numbers for your own company?
Get a free profit audit. We connect your field ops and finance and show where your crew's time turns into margin, and where cash is stuck.
No commitment. Real numbers, not generic advice.