CONCRETE CLUSTER · OVERHEAD BENCHMARKS

OVERHEAD RATE FOR CONCRETE FLATWORK CONTRACTORS — WHAT IT SHOULD BE.

QUICK ANSWER

The target overhead rate for concrete flatwork contractors doing $2M–$8M is 10–14%. Flatwork has specific overhead drivers that do not exist in vertical concrete work — finishing equipment inventory, weather monitoring systems, curing and protection materials management, and the scheduling complexity of weather-dependent pours. Most flatwork contractors who calculate their overhead rate for the first time find it running 3–5 points above what they have been bidding.

Flatwork is weather-dependent in a way most trades are not. The administrative overhead of managing weather windows, rescheduling crews, and maintaining finishing equipment in field condition is real overhead that belongs in the bid rate.

BY JOSH LUEBKERPublished: May 2026Updated: May 2026

THE TARGET RANGE

OVERHEAD BENCHMARKS FOR CONCRETE FLATWORK CONTRACTORS.

OVERHEAD RATE BENCHMARKS — $1M–$12M

10–14%Target range

15–19%Elevated — review discretionary items

20–25%High — structural problem

26%+Critical — overhead consuming all margin

Concrete flatwork contractors run similar overhead to structural concrete but with different driver mix. Finishing equipment and weather-related administration replace form inventory as the primary overhead differentiators from general overhead structure.

WHAT DRIVES FLATWORK OVERHEAD

THE LINE ITEMS THAT PUSH FLATWORK OVERHEAD ABOVE TARGET.

DRIVER 01

Finishing Equipment Fleet

Power trowels, laser screeds, bull floats, hand tools — the finishing equipment portfolio for a flatwork contractor is significant. Maintenance, storage, and replacement costs for equipment not charged to individual projects at a daily rate belongs in overhead. A flatwork contractor with 8 power trowels on 4-year replacement cycles carries meaningful equipment overhead before maintenance is included.

DRIVER 02

Weather Monitoring and Rescheduling Administration

Flatwork crews cannot pour in rain, wind above certain thresholds, or temperature extremes. The project coordinator time spent monitoring weather forecasts, communicating with GCs about pour day changes, rescheduling concrete deliveries, and managing crew scheduling around weather windows is administrative overhead. At $3M–$5M revenue with 150+ pour days per year, weather administration can run $15,000–25,000 annually.

DRIVER 03

Curing and Protection Material Management

Curing compounds, burlap, polyethylene sheeting, insulating blankets for cold weather — the curing and protection inventory that is not being charged to individual projects at a unit rate belongs in overhead as storage, replacement, and inventory management cost.

HOW TO CALCULATE YOURS

ONE SITTING. REAL NUMBER.

Pull every fixed cost from last 12 months — everything not a direct job cost

Include owner salary at market rate ($120K–$180K for most $2M–$8M owner-operators) — most commonly missing line item

Include office staff, rent, utilities, GL and umbrella insurance, vehicles not job-costed, software, accounting, legal, marketing

Divide total overhead by total revenue from the same 12 months

Compare to the bid rate you have been applying — the gap is unrecovered overhead on every project you have won

Free calculator: The CFOS overhead rate calculator walks through every line item and produces your real rate in about 10 minutes at constructioncfo.net/construction-overhead-rate-calculator-interactive

COMMON QUESTIONS

FREQUENTLY ASKED.

What overhead rate should I bid at for concrete flatwork work?

Bid at your real overhead rate — not an industry average. The benchmark range is a target to manage toward. Calculate your actual costs first, then compare to the benchmark to understand whether your cost structure is competitive. If your real rate is 16% and you bid at 10%, you are leaving 6 points of overhead unrecovered on every job.

How often should I recalculate my overhead rate?

Annually at minimum. Also recalculate any time a major overhead item changes — new hire, significant equipment purchase, office move, or major software change. The overhead rate reflects the real cost of running the business at its current size.

Does CFOS track overhead rate for concrete flatwork contractors?

Yes. Overhead rate calculation and monthly tracking is part of every CFOS engagement. The rate is recalculated annually and reviewed monthly against the trailing 12-month actual. When overhead creeps, the rate update happens before the next bid goes out.

Josh Luebker

Fractional CFO · The Construction CFO

Former commercial construction project manager and master electrician. Managed 150+ projects totaling $300M+. Now fractional CFO for commercial subcontractors doing $1M–$12M. About Josh → | LinkedIn →

RELATED RESOURCES

OVERHEAD RATE FOR CONCRETE FLATWORK CONTRACTORS — WHAT IT SHOULD BE.

OVERHEAD BENCHMARKS FOR CONCRETE FLATWORK CONTRACTORS.

THE LINE ITEMS THAT PUSH FLATWORK OVERHEAD ABOVE TARGET.

Finishing Equipment Fleet

Weather Monitoring and Rescheduling Administration

Curing and Protection Material Management

ONE SITTING. REAL NUMBER.

FREQUENTLY ASKED.

WHAT IS YOUR REAL FLATWORK OVERHEAD RATE?