Roofing Contractor Bookkeeping: The WIP Schedule That Tells You Whether Your Bank Balance Is Lying
A roofing WIP schedule ties revenue to work actually completed rather than to when you invoiced — percent complete equals costs to date divided by total estimated costs, and earned revenue equals percent complete times revised contract price. This guide walks a $192,000 TPO re-roof through the math, explains over- versus under-billing, retainage receivable and warranty accruals, and covers when Section 460 forces percentage-of-completion for tax (roughly $31 million in average gross receipts for 2026, or contracts running past two years).
