Where underground utility contractors lose money
6 things cost underground utility contractors money without ever showing up as a line item, and each one traces to a step you can install. Underground utility contractors average 18% gross margin, 15% overhead and 3% net profit at $1M–$5M of revenue. The CFOS target at that size is 24% gross margin, 14% overhead and 10% net, and the gap of 7 points on the bottom line is where those mechanisms live. Figures for all 7 revenue bands are in the table below.
Underground utility sits 9th of 11 in civil and earthwork on net profit, and it carries leaner overhead than the 48-trade average. Here is every figure, across all 7 revenue bands.
Underground utility by revenue band
| Metric | $1M–$5M | $5M–$10M | $10M–$25M | $25M–$50M | $50M–$100M | $100M–$500M | $500M+ | CFOS target |
|---|---|---|---|---|---|---|---|---|
| Overhead | 15% | 14% | 13% | 12% | 11% | 10% | 9% | 14% |
| Gross margin | 18% | 20% | 22% | 23% | 25% | 27% | 28% | 24% |
| Net profit | 3% | 6% | 9% | 11% | 14% | 17% | 19% | 10% |
SPM The Construction CFO. SPM Trade Benchmark Reference: Underground utility. 2026. Sulphur Prairie Management, LLC. https://runoncfos.com/trades/underground-utility. 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 underground utility
Thousands of feet of main are in the ground with the cost fully spent, and there's no pay app until a 12-inch valve clears the foundry. The line is in, backfilled, and the spec says nobody mandrels it for 30 days. Your crew left in month three of a 20-month build, and the money sits behind three separate clocks: retainage, municipal acceptance, and a maintenance bond that hasn't started. You priced one mobilization and the job needs four: deep utilities, structures and tie-ins, adjust-to-grade after paving, and then closeout CCTV and punch.
Each one below points at the item, the unit, the clock, or the party that makes it an underground utility problem, and it says which step fixes it.
| Mechanism | Why it's specific to this trade | Step |
|---|---|---|
| 3,000 feet of main can wait on one tapping valve | Most trades bill progress as they install. Underground utility bills on accepted quantity, and acceptance sits behind pressure test, disinfection, and an inspector's signature, all of which sit behind a tie-in you can't make without the valve. So one foundry item worth a small fraction of the contract holds the dirt, the pipe, the stone, and the labor out of billing for a whole quarter. | Project management |
| A failed bac-T is a crew week with no pay app | Retest hours have nowhere to go in most job cost setups, so they get buried in the pipe item that already looks profitable and the job report reads healthy while the crew burns days on a do-over. Testing is the one place in this trade where the calendar belongs to a city inspector and the bill belongs to you. Code those hours separately and you can finally see which specs, which labs, and which crews are generating the retests. | Job cost structure |
| You're first in the trench and last off the bond | Going in first means waiting longest, and because the maintenance clock starts at acceptance, the delays stack end to end and never overlap. The consumed bonding capacity is the piece owners miss: a job that was backfilled and accepted and then forgotten still eats the line that decides how much work you're allowed to chase this year. Nobody in the GC's office is tracking any of that on your behalf. | Monthly cadence |
| The lowboy goes back out three times after you're done | Almost no other trade leaves the site and comes back three times on the same contract, and the return trips are the ones priced per each. A price written for a single mobilization has to absorb every one of those equipment moves. On top of that, everything you installed in month two sits under 14 months of other trades' traffic, so when the closeout video shows a crushed or silted line, nobody can prove who ran over it and the repair falls on you. | Project management |
| Bond, fees, and pipe get paid before quantity one | Unit price plus in-place measurement is what makes the ramp on this trade so steep: the spend front-loads into fees, bonds, and material while the earning waits on a quantity that physically can't exist yet. Every other trade on that site bills something in its first month, while you bill a quantity an inspector has to measure first. The first pay app on a utility job is usually the smallest one of the whole job, which is backwards from the cash you just laid out to start it. | Software and bookkeeping alignment |
| Trench settles in linear feet, bills back in square yards | You get charged in units you never bid, by a contractor you never hired. The deduction comes out of money you already earned and are still waiting on, so the argument starts after your leverage is gone. No other trade on that site has its finished product buried under someone else's surface for a year and a half before anyone can see whether it held. | Standards and accountability |
Underground utility against the other 47 trades
| Metric | Underground utility | Civil and earthwork average | All 48 average | Rank |
|---|---|---|---|---|
| Overhead | 15% | 15% | 15.1% | 17th of 48 |
| Gross margin | 18% | 20.7% | 22.1% | 44th of 48 |
| Net profit | 3% | 5.7% | 7% | 46th of 48 |
Underground utility sheds 6 points of overhead between $1M–$5M and $500M+, against 6.2 for civil and earthwork as a group. Inside that group, SWPPP and erosion control keeps the most at 10%, and Civil, Excavation, Paving, 1 more all run 14% overhead, the leanest. Underground utility is neither, which is the usual position and the one with the most room in it.
Other civil and earthwork trades
What owners ask
What overhead should an underground utility contractor run?
Underground utility shares its overhead figure with 14 other trades at this revenue, which is what the published data resolves to. It runs 15% at $1M–$5M and 9% at $500M+, as a percentage of revenue. That's level with the civil and earthwork average. The CFOS target at $1M–$5M is 14%. The CFOS target is one point leaner than your trade's average at your revenue.
What gross margin should an underground utility contractor run?
Underground utility shares its gross margin figure with 4 other trades at this revenue, which is what the published data resolves to. It runs 18% at $1M–$5M and 28% at $500M+, as a percentage of revenue. That sits 2.7 points below the civil and earthwork average of 20.7%. The CFOS target at $1M–$5M is 24%. 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 an underground utility contractor run?
Underground utility shares its net profit figure with 1 other trade at this revenue, which is what the published data resolves to. It runs 3% at $1M–$5M and 19% at $500M+, before taxes, as a percentage of revenue. That sits 2.7 points below the civil and earthwork average of 5.7%. The CFOS target at $1M–$5M is 10%. The CFOS target is published at $1M to $5M.
What profit margin should a small underground utility business run?
Owners usually mean net profit when they say profit margin, and for underground utility at $1M–$5M that's 3%. Gross margin is a different number, 18%, and it's what's left after job costs but before overhead. Overhead is the 15% sitting between the two. A small underground utility business holding 3% net is at the published figure for its size, and the CFOS target at that revenue is 10%.
Does underground utility get more profitable as it grows?
Overhead is the number that moves. Underground utility sheds 6 points between $1M–$5M and $500M+, which is in line with the 6.2 points civil and earthwork sheds as a group. Net profit starts 4 points under the 48-trade average, so the room is in the overhead line before it's anywhere else.
Where does underground utility sit against the other trades?
Underground utility ties 1 trade in civil and earthwork on net profit, all at 3%. SWPPP and erosion control keeps the most at 10%. Civil, Excavation, Paving, 1 more run the leanest overhead at 14%. Gross margin ranks 44th of 48 and overhead ranks 17th.
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 underground utility contractors as a service. It is a separate firm, Sulphur Prairie Management, LLC, run by the same author.
What a fractional CFO does for underground utility contractors
Wrote CONTROL, the 8 step system these figures sit inside. More about the author.