How to Read a WIP Schedule (and Why Your Surety Cares)

The work-in-progress (WIP) schedule is the single most-scrutinized report a general contractor produces. Your surety reads it before extending a bond. Your bank reads it before extending a line. And a good controller reads it every month to catch a job drifting before it becomes a loss. Yet most contractors treat it as a once-a-year chore they dread. It doesn't have to be.

What a WIP schedule actually shows

At its core, a WIP schedule answers one question for every open job: have you billed more than you've earned, or less? "Earned" is measured by percent complete – usually cost-to-cost: the costs you've incurred divided by the total costs you now expect. Multiply that percentage by the contract value and you have earned revenue. Compare it to what you've actually billed, and every job lands in one of two positions.

• •Overbilled (billings in excess of costs, or "BIE"): you've invoiced ahead of the work. That's a liability – you owe that work.
• •Underbilled (costs in excess of billings, or "CIE"): you've done work you haven't billed for yet. That's an asset – money you're owed.

Neither is automatically good or bad. Healthy contractors usually run modestly overbilled – it funds the job. But a job that's heavily underbilled is financing the owner out of your pocket, and a job that swings from overbilled to underbilled late in its life is often a job whose costs are running away.

Why the surety reads it so closely

Underwriters aren't just checking your profit. They're checking your discipline. Wild swings in billing position, profit fade from one period to the next, and jobs that never seem to close all signal a contractor who doesn't have a firm grip on cost. That's the real product a surety is buying: confidence that you know where every job stands.

The WIP schedule isn't a tax form. It's the clearest picture you have of whether your jobs are being run with discipline.

Live vs. definitive

There are really two versions of this report. A live WIP – computed any day from posted transactions – is a working estimate you use to make decisions midstream. A definitive WIP is produced at period close, after overhead and labor burden are allocated, frozen, and reconciled to the general ledger to the penny. The surety wants the definitive one. Your PMs need the live one. The mistake is treating them as the same document, or rebuilding both by hand in a spreadsheet every time someone asks.

In SCPM Construction Accounting – the engine built into SCPM Project – both are a single click, and the definitive version ties to the CIE/BIE accounts on its face. No weekend spreadsheet, no wondering whether the numbers still reconcile.