HEAVY CIVIL & INFRASTRUCTURE CLUSTER · CFOS TRADE OPERATING SYSTEM

WHY BRIDGE CONTRACTORS LOSE MARGIN WITHOUT KNOWING IT.

QUICK ANSWER

Bridge margin is lost to three specific things: the surety ceiling, the window hostage, and the invisible structure. All three are measurable, and all three are invisible without job costing that reads against the estimate.

Bridge contractors at $1M to $5M net 6 percent on the SPM 48-trade dataset, rising to 9 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. Bonding capacity sets the trade's growth limit, and capacity is a function of statements the surety believes. WIP accuracy and retained equity are bridge-market business development.

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

THE MATH BEHIND THE MISSING CASH.

LEAK 01

The Surety Ceiling

Bonding capacity sets the trade's growth limit, and capacity is a function of statements the surety believes. WIP accuracy and retained equity are bridge-market business development.

LEAK 02

The Window Hostage

In-water permits and work windows own the foundation schedule, and a missed window slides a season. Mobilization plans built around the permit calendar, with slide contingency priced, are the trade's schedule insurance.

LEAK 03

The Invisible Structure

Falsework, cofferdams, and causeways are engineered projects inside the project that demobilize as pure cost. Temporary works carried as first-class cost codes keep the bid from donating them. (cfos-job-profitability-system) ---

HOW CFOS FIXES IT

WHAT CHANGES IN THE FIRST 60 DAYS.

DOT paper at bonding scale
The water window (marine permits over a highway schedule)
Falsework, formwork, and the temporary structure nobody sees
The inspection-driven rehab market
Steel, concrete, and the escalation ledger
BRIDGE BENCHMARKS
Metric$1M to $5M$5M to $10M$10M to $25M
Gross margin, industry average22%23%24%
Gross margin, CFOS target24%23.5%24%
Net profit, industry average7%9%11%
Net profit, CFOS target10%10.5%12%
Overhead, industry average15%14%13%
Overhead, CFOS target14%13%12%

Industry figures are Bridge 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. The gross margin and overhead figures for this trade are derived from the nearest comparable trade in the same dataset, and were not measured directly.

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.

Bridge contractors at $1M to $5M net about 6 percent on the SPM 48-trade benchmark dataset, rising to 9 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The classic leaks are underpriced temporary works, unelected escalation clauses, and window slides absorbed instead of planned. Every net profit figure here is stated before taxes, the same basis CFMA reports on, so the two are directly comparable.
Because DOT bridge lettings require performance and payment bonds at contract scale, and the surety's aggregate and single-project limits derive from financial statements and WIP schedules it trusts. Growth in this market is underwritten before it's bid; statement discipline and retained equity are the expansion plan.
They own the foundation schedule: environmental permits restrict when piers, cofferdams, and in-channel work can proceed, and a missed window slides that work a season. Build mobilization around the permit calendar, price the slide contingency, and keep the falsework plan ready for the window that opens.
As engineered projects with full lifecycles: design, materials, erection, rental or ownership carry, and removal, coded separately from permanent work. Cofferdams and falsework that rival permanent line items in cost can't live inside a general-conditions allowance.
The inspection-driven side of the trade: federal inspection standards keep the inventory on a rating cycle, and ratings trigger deck replacements, painting, and rehabilitation continuously. Rehab runs its own economics (phased traffic control, existing-structure unknowns, containment on older coatings) and deserves its own division and pricing history.
Sulphur Prairie Management, operating as The Construction CFO, publishes the 48-trade benchmark dataset these numbers come from. SPM's deepest specialization is 24 core commercial trades, and SPM works with bridge contractors who want the same financial system: onboarding, clean books, a maintained 13-week cash flow forecast, and monthly health reviews, with job costing simplified to what the business runs on. The full 48-trade benchmark reference exists so owners in every trade can measure against real numbers. ---
CFOS serves commercial bridge 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 construction project manager and master electrician. Managed 150+ projects worth more than $2.1B combined, with individual jobs from $50,000 to $300M, including data centers, military bases, hospitals, and high-rises. Now fractional CFO for commercial subcontractors doing $1M to $12M through Sulphur Prairie Management.About Josh  | LinkedIn

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