The Complete Guide to WIP Reporting for Contractors

The WIP Schedule Is the Most Misunderstood Report in Construction Finance

I've prepared and reviewed WIP schedules throughout my career in construction accounting. And I can tell you that the majority of contractors either don't produce one at all, or produce one that's wrong in ways they don't realize. That's a problem — because this report is how the most important people in your financial life evaluate your business.

Your surety uses it to determine your bonding capacity. Your bank uses it to assess your line of credit. If you're ever planning to sell the business, a buyer's accountant will scrutinize it heavily. Getting it right isn't optional. It's foundational.

What a WIP Schedule Actually Shows

A Work-In-Progress schedule calculates how much revenue you've earned on each active job based on actual completion — not how much you've billed, not how much you've collected. Those three numbers are almost never the same, and the differences between them tell the real story of your financial position.

For each job, the schedule calculates: total contract value, total estimated costs, costs incurred to date, percentage complete, earned revenue to date, total billed to date, and the resulting overbilling or underbilling. Every line feeds into your balance sheet and income statement under GAAP accounting.

Overbilling: Why It Looks Like a Win But Isn't

When you've billed more than you've earned based on completion, that excess is a liability called "billings in excess of costs." I've talked to contractors who thought a large overbilling balance meant they were ahead. It means the opposite — you've received cash for work you haven't done yet. You owe that performance. It's a future obligation sitting on your balance sheet, and sophisticated lenders and sureties see it immediately.

Underbilling: The Hidden Asset Most Contractors Miss

When you've earned more revenue than you've billed, that difference is an asset called "costs in excess of billings." A situation I encounter regularly: a subcontractor has significant underbillings sitting unrecognized because billing applications have fallen behind. The balance sheet looks weaker than the true business position. The banker gets nervous. Once we clean up the WIP schedule and submit the overdue applications, the financial picture looks completely different — accurately reflecting the work that's actually been performed. That kind of correction changes how lenders and sureties view the business.

The Two Revenue Recognition Methods You Need to Understand

• Percentage of Completion: Revenue recognized progressively as the project advances. This is the standard method for long-term contracts and what most commercial lenders and sureties expect to see. It gives you the most accurate picture of financial position at any point in time.
• Completed Contract: Revenue recognized only when the entire job is finished. Simpler to track, but it creates lumpy financial statements that are harder for lenders to interpret and can obscure how well the business is actually doing during active construction periods.

Common WIP Schedule Mistakes I See Constantly

Using cost-to-complete estimates that are too optimistic. Forgetting to include change orders in the contract value. Mixing completed jobs into active job calculations. Using billings as a proxy for percentage complete instead of calculating actual cost incurred over total estimated cost. Any one of these errors produces a WIP schedule that tells the wrong story — and the people reviewing it will often catch it before you do.

If you don't have a clean, current WIP schedule — or you're not sure if yours is accurate — let's talk. This is fixable, and getting it right changes how every key stakeholder views your business.