CONCRETE & MASONRY CLUSTER · CFOS TRADE OPERATING SYSTEM

WHY CONCRETE FLATWORK CONTRACTORS LOSE MARGIN WITHOUT KNOWING IT.

QUICK ANSWER

Concrete Flatwork margin is lost to three specific things: the 72-hour window, the tolerance tier, and the finishing clock. Concrete Flatwork subcontractors at $1M to $5M run 22 percent gross and 6 percent net, against CFOS targets at $1M to $5M of 23 percent gross and 10 percent net. All three are measurable, and all three are invisible without job costing that reads against the estimate.

Concrete flatwork contractors at $1M to $5M net 6 percent, rising to 8.5 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The distance between the trade average and the CFOS target isn't a pricing problem in this trade. It sits in the three mechanisms below, each of which moves margin without appearing as a failure on any single job. FF/FL numbers measured within 72 hours of troweling are the slab as placed; anything measured later is the slab as abused. The contractor who commissions and bills the timely test owns the acceptance record; the one who skips it owns whatever the building does to the slab afterward.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-08-06
THE THREE BIG LEAKS

THE MATH BEHIND THE MISSING CASH.

LEAK 01

The 72-Hour Window

FF/FL numbers measured within 72 hours of troweling are the slab as placed; anything measured later is the slab as abused. The contractor who commissions and bills the timely test owns the acceptance record; the one who skips it owns whatever the building does to the slab afterward.

LEAK 02

The Tolerance Tier

Conventional, flat, very flat, superflat: each tier is a different production system with different cost. Selling F-numbers without pricing F-numbers donates the difference between a bull float and a laser screed.

LEAK 03

The Finishing Clock

The slab sets on chemistry's schedule and the crew stays until it's done. Finishing-window labor coded inside a blended rate hides the trade's defining overtime pattern, job after job. (cfos-job-profitability-system) ---

HOW CFOS FIXES IT

WHAT CHANGES IN THE FIRST 60 DAYS.

The 72-hour flatness clock (FF/FL disputes)
Superflat economics (tolerance is a product)
Finishing crew economics on pour night
Joint layout changes (the saw-cut change order)
Small pours and premiums
CONCRETE FLATWORK BENCHMARKS
Metric$1M to $5M$5M to $10M$10M to $25M
Gross margin, industry average22%23%24%
Gross margin, CFOS target23%23%24%
Net profit, industry average8%10%12%
Net profit, CFOS target10%11%13%
Overhead, industry average14%13%12%
Overhead, CFOS target13%12%11%

Industry figures are ConcreteFlatwork contractors' AVERAGE for each revenue band, not a floor. The CFOS net profit target is set at 10 percent before taxes or 3.5 points better than your trade's average at your revenue, whichever is higher, and the gross margin target is set at whatever gross margin produces that net profit once your overhead is paid, and never below your trade's own average. Gross minus overhead equals net on every column, so the rows tie out.

Last 12 months revenueMonthly fee
Up to $1M$1,900 to $2,900
$1M to $3.5M$2,600 to $3,900
$3.5M to $6.5M$3,800 to $5,700
$6.5M to $9.5M$5,100 to $7,100
$9.5M to $12.5M$6,100 to $8,500
$12.5M to $15.5M$7,400 to $11,000
$15.5M to $18.5M$9,400 to $13,500
$18.5M+Quoted individually

Range reflects the three tiers below. Which one you're in depends on how much of the work you want off your desk. No payroll. No hidden line items.

Core

You stop guessing.

You get the CFO work. Job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a meeting every month that ends in decisions rather than a report.

Your bookkeeper keeps doing the books.

Executive

You stop touching the books.

Everything in Core, and we run the bookkeeping and the controllership as well. Nobody in your office is answering coding questions or chasing a reconciliation at month end.

We do the books. No payroll.

Strategic

Every job shows its margin while it's still running.

Everything in Executive, plus the job costing and WIP platform set up, loaded with your cost codes, and managed for you every month. You never have to learn it.

We do the job costing.

What's included
COMMON QUESTIONS

FREQUENTLY ASKED.

Flatwork contractors at $1M to $5M net 6 percent on average, rising to 8.5 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The trade's leaks are tolerance work sold at conventional prices, finishing-window overtime hidden in blended rates, and flatness disputes lost for want of a 72-hour test. Every net profit figure here is stated before taxes, the same basis CFMA reports on, so the two are directly comparable.
FF measures flatness (short-range bumps over roughly 2-foot intervals); FL measures levelness (slope over roughly 10-foot intervals), both computed under ASTM E1155 from profiler readings. A floor can be smooth but tilted (high FF, low FL). Specifications state both, often with minimum local values so a passing average can't hide a failing corner.
The 72-hour rule usually decides it. ASTM E1155 requires measurement within 72 hours of final troweling, before loads and partitions distort the slab; a timely, documented test is the finisher's acceptance record, and a late test measures the building's abuse, not the placement. Commission the test, bill it as a line item, and keep the report.
By the specified F-numbers, not the square footage. FF-50-plus floors for AGVs and defined-traffic aisles require laser screeds, restraightening, and narrow-strip placement; tolerance is the product tier, and conventional-flat pricing on superflat specs donates the hardest work in the trade.
Because finishing runs on the concrete's set time, not the clock: the crew stays until the surface is done, at whatever hour the chemistry dictates. Code finishing-window labor separately from placement labor, track it against mix, weather, and admixtures, and price the pattern instead of absorbing it.
A bookkeeper records history. F-number-tiered pricing, 72-hour test protocols, finishing-window labor codes, and small-pour premium discipline are a control system, which is CFO work. SPM operates that financial control function for concrete flatwork contractors. ---
CFOS serves commercial concrete flatwork subcontractors doing $1M to $12M. Pricing starts at $1,900 per month for companies under $1M and runs to $13,500 per month at the top published band. Onboarding takes 60 days.
Three tiers, and which one you are in depends on how much of the work you want off your desk. Core is where you stop guessing: job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a monthly meeting that ends in decisions, while your bookkeeper keeps doing the books. Executive is where you stop touching the books, because we run the bookkeeping and the controllership as well. Strategic is where every job shows its margin while it is still running, because the job costing and WIP platform is set up and managed for you. No payroll. No scope gaps.
Sixty days. We migrate your books back to the start of your last taxable year, set up ControlQore, and build your job costing structure from scratch. Fully operational in two months.
$10.7M+
Client AR Recovered Since 2023
48
Active Trade Specializations
60 DAYS
Average Onboarding Time
WHAT THIS TIES INTO
Josh Luebker, The Construction CFO
Josh Luebker
FRACTIONAL CFO · THE CONSTRUCTION CFO

Former commercial project manager and master electrician: 150+ projects worth $2.1B combined, from $50,000 to $300M. Now fractional CFO to commercial subcontractors.

DO YOU KNOW YOUR TRUE MARGIN ON CONCRETE FLATWORK WORK?

Bring one job. We will show you the difference between what you bid and what it cost.

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