
Spec Home Builder Bookkeeping: WIP Schedules, Percentage of Completion, and Why Profitable Builders Run Out of Cash
A monthly work-in-progress (WIP) schedule turns four numbers per job — contract price, estimated cost, costs to date, and billings to date — into an early warning for overbilling and underbilling, the cash-flow gaps that sink profitable builders. Spec builders also differ from contract builders on revenue recognition, since homes held as inventory typically use the completed contract method under the IRC Section 460 home construction exemption.









