The cabinet clock doesn't start until someone signs
You won the job in March and the shop still hasn't cut a stick, because nobody has stamped the shop drawings. The fabrication clock starts at approval, and the architect owns that date.
A plumber's long lead item sits in a catalog with a part number and a published lead time you can read before you bid. Yours doesn't exist yet. It gets drawn by your shop, reviewed by an architect who has no deadline written into your contract, and only then does anything get cut, which means the biggest schedule risk on the job is a signature you can't chase with a purchase order.
The size of it
A crew sized for a start date that slides eight weeks either sits on your overhead or gets released and re-hired at a premium, and the shop slot you were holding gets sold to the next job. The span between award and first cash on a millwork package routinely runs a full quarter with nothing to bill.
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 238130 / 238350, so there's no carpentry 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.
Custom millwork and casework run roughly 6 to 12 weeks of fabrication after shop drawing approval, and a complex package can reach 14 to 16 weeks. That's why the rule of thumb is drawings to the architect 12 to 16 weeks ahead of install. Plated trusses and engineered floor systems stack their own sequence: engineering and sealed drawings first, then permit, then two to six weeks of manufacturing. In both cases you're the party who has to produce the drawing, and someone else owns the date it gets released.
Three moves, in order
Step 06: Project management
Billing dates, change orders, and notices, run as standards that hold without anyone chasing them.
What else costs carpentry contractors money
The same mechanism in other trades
What carpentry owners ask
Why is my millwork taking 12 weeks after we already won the job?
You won the job in March and the shop still hasn't cut a stick, because nobody has stamped the shop drawings. The fabrication clock starts at approval, and the architect owns that date.
What does it cost?
A crew sized for a start date that slides eight weeks either sits on your overhead or gets released and re-hired at a premium, and the shop slot you were holding gets sold to the next job. The span between award and first cash on a millwork package routinely runs a full quarter with nothing to bill.
What do I do first?
Put two dates on every millwork job in your job cost file: the award date and the stamped approval date. Build the labor plan off the second one.
Are there published benchmarks for carpentry?
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 238130 / 238350, 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 06, project management. Billing dates, change orders, and notices, run as standards that hold without anyone chasing them. It comes from chapter 6 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.