Your Modular Construction Accounting Playbook

Modular Jobs Break Normal Accounting Episode Summary Modular construction changes the way costs move through a project. Traditional site-build job costing follows labor, materials, subs, equipment, and overhead at the jobsite. Modular adds a factory layer: inventory, direct production labor, plant overhead, quality control, logistics, freight, cranes, staging, and installation. In this episode, George explains why modular construction accounting needs a different structure, how normal job costing can hide profit leaks, and what contractors should track before they scale modular work. Key Takeaways Modular construction is construction plus manufacturing. Traditional job costing often fails because it does not separate factory, logistics, and field costs. Factory labor, inventory, plant overhead, rework, and quality control need their own tracking. Revenue recognition depends on contract terms, transfer of control, and WIP treatment. Materials may need to move through raw inventory, WIP, finished modules, and job cost. Billing milestones must match real cash outflows or the contractor finances the job. Modular WIP should be reviewed monthly, not only at year-end. Common Contractor Mistakes Treating the factory like a jobsite. Coding all modular costs into one job bucket. Ignoring inventory and WIP accounting. Failing to allocate plant overhead. Using blended labor rates that hide factory inefficiency. Forgetting freight, storage, cranes, escorts, and rework in estimates. Writing contracts that do not match billing, title transfer, and revenue recognition. Practical Next Steps Create separate cost codes for design, factory, logistics, site install, and general conditions. Track factory labor by job, module, and operation. Use inventory and WIP accounts for materials and modules. Build a plant overhead rate and apply it consistently. Review modular WIP monthly. Make sure contract billing milestones match cash-flow reality. CTA Book a 15-minute consultation: https://accountingsolutionsllp.com/ap...