Where concrete flatwork contractors lose money
6 things cost concrete flatwork contractors money without ever showing up as a line item, and each one traces to a step you can install. Concrete flatwork contractors average 22% gross margin, 14% overhead and 8% net profit at $1M–$5M of revenue. The CFOS target at that size is 23% gross margin, 13% overhead and 10% net, and the gap of 2 points on the bottom line is where those mechanisms live. Figures for all 7 revenue bands are in the table below.
Concrete flatwork sits 1st of 5 in concrete and masonry on net profit, and it carries leaner overhead than the 48-trade average. Here is every figure, across all 7 revenue bands.
Concrete flatwork by revenue band
| Metric | $1M–$5M | $5M–$10M | $10M–$25M | $25M–$50M | $50M–$100M | $100M–$500M | $500M+ | CFOS target |
|---|---|---|---|---|---|---|---|---|
| Overhead | 14% | 13% | 12% | 11% | 10% | 9% | 8% | 13% |
| Gross margin | 22% | 23% | 24% | 25% | 26% | 27% | 29% | 23% |
| Net profit | 8% | 10% | 12% | 14% | 16% | 18% | 21% | 10% |
SPM The Construction CFO. SPM Trade Benchmark Reference: Concrete flatwork. 2026. Sulphur Prairie Management, LLC. https://runoncfos.com/trades/concrete-flatwork. CC BY 4.0.
Figures on this page were last revised 2026-08-21. Published under CC BY 4.0, which permits reuse of any figure here, including commercially, as long as the credit above travels with it. The same figures in machine-readable form: /benchmarks.json.
Trade level gross margin and overhead compiled by SPM The Construction CFO, validated against published CFMA and JMCO benchmarks. The CFOS targets beside them are from the book CONTROL: The Construction Financial Operating System, published with the full reference at runoncfos.com.
- 2024 Construction Financial Benchmarker, Executive Summary, Construction Financial Management Association, 2024.
- 2025 Performance Benchmarks, Construction Companies, Jones Maresca and Company, 2025.
- SPM Trade Benchmark Reference, Sulphur Prairie Management, LLC, 2026.
Sourcing and method: the methodology page.
Which bands are measured. The 4 bands above $10M–$25M carry the survey curve further out and have not been reconciled against the licensed CFMA Benchmarker. How every figure was built is set out on the methodology page.
6 problems specific to concrete flatwork
You priced the yard in March off a quote sheet and bought it in November off a new one, and the number you signed with the GC never moved an inch. The slab came out at the thickness the drawings called for, you never got a change order, and you still bought and placed yards that weren't in the bid. You can't buy concrete ahead of the job or ahead of a price increase. Tuesday morning you spend sixty grand before lunch, you bill it on the 25th, and the money reaches your account sometime in October if the GC gets paid.
Each one below points at the item, the unit, the clock, or the party that makes it a concrete flatwork problem, and it says which step fixes it.
| Mechanism | Why it's specific to this trade | Step |
|---|---|---|
| Your ready-mix quote expires. Your subcontract doesn't. | Every trade deals with price movement. Flatwork is the one where the single largest cost line is quoted on a document that expires while the contract selling it doesn't, and where the product can't be bought early and stored to lock the price in. On top of the base yard price the same sheet carries winter surcharges from October 15 to March 31, seasonal restricted-load fees, cold-weather accelerator priced per yard per one percent, and fuel surcharges that were nowhere in a summer estimate. | Estimating system |
| The 63 yards disappear between square feet and cubic yards | Most trades buy and sell in the same unit. Flatwork is priced in area and purchased in volume, and the multiplier between them belongs to the sitework or utility contractor who set the grade. That makes another company's tolerance a direct line in your cost, and the only place it can be caught is on the day's delivery tickets. | Job cost structure |
| The long lead item in flatwork is a truck slot | Every other trade de-risks lead time by ordering early and warehousing the material. Flatwork can't do either, so schedule risk and price risk become the same risk: you can't buy ahead of an increase, and you've no inventory to pour from on a morning the plant says there are no trucks. The supplier controls both the date and the price, and you carry the crew either way. | Project management |
| One pour day outspends a month of payroll | Flatwork's spend is lumpier and further front-loaded than any other trade's, because one morning consumes a month's worth of material in seven hours. The vendor financing that morning can shut down your whole operation over a single late statement, which turns one slow-paying GC into a company-wide stoppage across jobs that are current. That's a cash timing problem, and no margin number on the P&L will tell you it's coming. | Monthly cadence |
| You bid one mobilization and drove out five times | The estimate gets built on total square feet, and total square feet assumes one setup without ever saying so. The closeout pours have the worst yardage to labor ratio in the trade, with short load fees applying under about 4 yards and demurrage exposure when a truck sits past the allowed unload time, so the smallest scope carries the highest unit cost and the most equipment per yard placed. Nothing in the bid separates the last trip from the first, so the loss on it stays invisible until the job closes. | Equipment cost basis |
| Fifteen trades wreck the floor and one sub pays for it | No other trade's finished product gets walked on, driven over, drilled through, scaffolded on, and stained by fifteen following contractors for eighteen months and then graded on a punch list. The last trade to damage the floor is never the one billed for it. The GC holds your retention as the enforcement mechanism, so the argument starts after your leverage is already gone. | Standards and accountability |
Concrete flatwork against the other 47 trades
| Metric | Concrete flatwork | Concrete and masonry average | All 48 average | Rank |
|---|---|---|---|---|
| Overhead | 14% | 14.6% | 15.1% | 6th of 48 |
| Gross margin | 22% | 21.8% | 22.1% | 20th of 48 |
| Net profit | 8% | 7.2% | 7% | 8th of 48 |
Concrete flatwork sheds 6 points of overhead between $1M–$5M and $500M+, against 6 for concrete and masonry as a group. Inside that group, Concrete flatwork keeps the most at 8%, and Concrete, Concrete flatwork and Masonry all run 14% overhead, the leanest. This trade is one of them on both counts.
Other concrete and masonry trades
What owners ask
What overhead should a concrete flatwork contractor run?
Concrete flatwork shares its overhead figure with 10 other trades at this revenue, which is what the published data resolves to. It runs 14% at $1M–$5M and 8% at $500M+, as a percentage of revenue. That sits 0.6 points below the concrete and masonry average of 14.6%. The CFOS target at $1M–$5M is 13%. The CFOS target is one point leaner than your trade's average at your revenue.
What gross margin should a concrete flatwork contractor run?
Concrete flatwork shares its gross margin figure with 12 other trades at this revenue, which is what the published data resolves to. It runs 22% at $1M–$5M and 29% at $500M+, as a percentage of revenue. That sits 0.2 points above the concrete and masonry average of 21.8%. The CFOS target at $1M–$5M is 23%. The CFOS target is published at $1M to $5M. It's set at whatever gross margin produces the net profit target once overhead is paid, and never below your trade's own average.
What net profit should a concrete flatwork contractor run?
Concrete flatwork shares its net profit figure with 12 other trades at this revenue, which is what the published data resolves to. It runs 8% at $1M–$5M and 21% at $500M+, before taxes, as a percentage of revenue. That sits 0.8 points above the concrete and masonry average of 7.2%. The CFOS target at $1M–$5M is 10%. The CFOS target is published at $1M to $5M.
What profit margin should a small concrete flatwork business run?
Owners usually mean net profit when they say profit margin, and for concrete flatwork at $1M–$5M that's 8%. Gross margin is a different number, 22%, and it's what's left after job costs but before overhead. Overhead is the 14% sitting between the two. A small concrete flatwork business holding 8% net is at the published figure for its size, and the CFOS target at that revenue is 10%.
Does concrete flatwork get more profitable as it grows?
Overhead is the number that moves. Concrete flatwork sheds 6 points between $1M–$5M and $500M+, which is in line with the 6 points concrete and masonry sheds as a group. Net profit is already above the 48-trade average, so the room is in holding it while revenue climbs.
Where does concrete flatwork sit against the other trades?
Concrete flatwork is 1st of 5 in concrete and masonry on net profit. It keeps the most in the group. Its overhead is the leanest too, level with Concrete and Masonry. Gross margin ranks 20th of 48 and overhead ranks 6th.
Everything on this page is something you can install yourself, andCONTROL is the order to do it in. If you would rather buy the finished result, SPM The Construction CFO does this work for concrete flatwork contractors as a service. It is a separate firm, Sulphur Prairie Management, LLC, run by the same author.
What a fractional CFO does for concrete flatwork contractors
Wrote CONTROL, the 8 step system these figures sit inside. More about the author.