Built, Boxed, and Not Billable Until It Leaves the Shop
The casework is finished, wrapped, labeled, and standing on your floor, and the standard payment clause says none of it counts until it reaches the site.
Most subs produce and bill in the same building, so their payment clause and their work sit in the same place. Millwork produces in one building and bills against another, and A201 was written around the second one. That mismatch is why a shop can be stacked wall to wall with finished, profitable product and still be tight on Friday.
The size of it
You finance 100 percent of material and shop labor on every job from buyout through delivery, which on a compressed install schedule runs months. This is the single largest working capital burden in the trade and the reason a busy shop looks profitable in the books and has no cash.
No published benchmark reference breaks this trade out on its own. CFMA reports at NAICS level, and at that level this trade rolls into a broader bucket with several others. That's why this page carries mechanisms and no margin figures. It reports inside NAICS 238350 Finish Carpentry, so there's no millwork and casework margin figure to put in this box. The 48 trades that do publish average 7% net profit at $1M–$5M before taxes, which is the nearest reference point worth anything here.
AIA A201 pays for materials and equipment delivered and suitably stored at the site. A millwork shop does roughly 80 percent of its value-add at its own facility, so a job can be fully built and fully paid for in labor and material while it still sits outside the payment language. Getting it onto a pay application anyway takes a vesting certificate or bill of sale, physical segregation and project labeling, date-stamped photos, additional insured certificates, supplier lien waivers, and sometimes owner inspection rights. Miss one element and the application gets denied, and you wait another 30 days.
Three moves, in order
Step 01: Job cost structure
Seven cost categories and three levels of granularity, built so the estimate and the ledger use the same words.
What else costs millwork and casework contractors money
The same mechanism in other trades
What millwork and casework owners ask
Can i bill for finished casework stored in my shop before delivery?
The casework is finished, wrapped, labeled, and standing on your floor, and the standard payment clause says none of it counts until it reaches the site.
What does it cost?
You finance 100 percent of material and shop labor on every job from buyout through delivery, which on a compressed install schedule runs months. This is the single largest working capital burden in the trade and the reason a busy shop looks profitable in the books and has no cash.
What do I do first?
Read the payment article on the next subcontract before you sign it, and ask for stored materials language that covers off site storage at your shop.
Are there published benchmarks for millwork and casework?
No, and this site won't print one. No published benchmark reference breaks this trade out on its own. CFMA reports at NAICS level, and at that level this trade rolls into a broader bucket with several others. That's why this page carries mechanisms and no margin figures. In the surveys it rolls into NAICS 238350 Finish Carpentry, so the closest honest reference is the 48-trade table, where net profit at $1M–$5M averages 7% before taxes. Read that as the neighbourhood, and read your own job costing as the answer.
Which part of the system fixes it?
The step is number 01, job cost structure. Seven cost categories and three levels of granularity, built so the estimate and the ledger use the same words. It comes from chapter 1 of CONTROL: The Construction Financial Operating System.
Josh Luebker ran commercial construction projects before he ran the numbers behind them, on data centres, military bases, hospitals, and high-rises. He wrote CONTROL: The Construction Financial Operating System, which is an eight-step framework for commercial subcontractors, and it publishes on October 1, 2026. He is a master electrician who moved into the office and kept the field vocabulary.
Sulphur Prairie Operations LLC maintains the benchmark reference behind these figures. Every edition is reconciled against the newest CFMA survey release before it publishes here. Where a figure changes between editions, the older edition keeps its year in the title so a citation to it stays correct.