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CONTROL: THE CONSTRUCTION FINANCIAL OPERATING SYSTEM 8 STEPS · 60 DAYS · YOUR BUSINESS FINALLY MAKES SENSE JOSH LUEBKER · MASTER ELECTRICIAN · $2.1B+ IN PROJECTS MANAGED TRADE CONTRACTORS FROM STARTUP TO $50M · AVAILABLE OCT 1, 2026 CONTROL: THE CONSTRUCTION FINANCIAL OPERATING SYSTEM 8 STEPS · 60 DAYS · YOUR BUSINESS FINALLY MAKES SENSE JOSH LUEBKER · MASTER ELECTRICIAN · $2.1B+ IN PROJECTS MANAGED TRADE CONTRACTORS FROM STARTUP TO $50M · AVAILABLE OCT 1, 2026
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Home / Trades / Precast
PRECAST CONTRACTORS
PHASE 3 · CONCRETE & STRUCTURAL

Why Precast Contractors Mix Plant and Field Costs

QUICK ANSWER

Precast contractors mix plant and field costs into one number and lose sight of both. Casting happens months before erection, so billing structured around field progress starves the plant, and joint detail changes get installed before they get priced. CONTROL separates plant from field and bills each on its own terms.

BY JOSH LUEBKER · UPDATED JUL 2026 · COMING SOON
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PROOF FROM A RELATED TRADE
$161K to $1.1M Net Profit
Concrete contractor, same system.
THE CASH PROBLEMS

The specific ways precast contractors lose cash, pulled straight from what makes this trade different.

Plant vs Field Cost Separation

The plant is a manufacturing business and the field is a construction business. Blending their costs hides which one is making money and which one is bleeding.

Delivery and Erection Billing

Pieces cast in March that erect in June leave a three-month funding hole. Billing casting milestones separately from erection keeps the plant funded by the project.

Joint Detail Change Orders

Revised joint details mean new engineering, new hardware, and new field time. A change order standard prices the revision before the crew installs it.

THE FIX

The CONTROL chapters that solve this for precast contractors specifically.

CHAPTER 1
Job Cost Structure
Separate cost structures for plant production and field erection.
CHAPTER 3
Overhead Calculation
An overhead rate that knows the plant from the field office.
CHAPTER 6
Project Management Standards
Casting milestone billing and joint detail change orders.
RELATED READING
NICHE OS
Why Trade Contractors Run Out of Cash
The master diagnosis every trade starts with.
NICHE OS
Why Your Overhead Rate Is Wrong
Why a blended plant-and-field overhead rate is wrong twice.
SYSTEM HUB
Run On C.F.O.S.
All 8 steps of the CONTROL system.
QUESTIONS PRECAST CONTRACTORS ASK
Why do precast contractors run out of cash between casting and erection?
Precast contractors run out of cash between casting and erection because the plant spends heavily months before the field generates a pay application. When billing waits on erection, the plant's concrete, steel, and labor float on the company's working capital the whole time. Casting milestone billing closes that funding hole.
How should a precast contractor separate plant and field costs?
A precast contractor should run the plant and the field as separate cost structures, each with its own codes and its own overhead behavior. Chapter 1 of CONTROL builds that separation and Chapter 3 splits the overhead rate, so plant utilization problems stop hiding inside field margins and the reverse.
What profit margin should a precast contractor target?
A precast contractor should target 22 to 30% gross profit per project and 12% net profit after all expenses, with overhead between 9 and 13% measured separately for plant and field. A blended rate is wrong for both sides of the business, and every bid inherits the error.
Josh Luebker, President, SPM The Construction CFO
JOSH LUEBKER
PRESIDENT · SPM THE CONSTRUCTION CFO

Josh Luebker is a former commercial construction project manager and master electrician. He has managed 150+ projects totaling $2.1B+, including Google data centers, military bases, hospitals, and high-rises. CONTROL is built on what works in the field.

Josh leads SPM The Construction CFO (Sulphur Prairie Management, LLC), the fractional CFO for commercial subcontractors.

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