Fiber & Telecom Contractor Financial Benchmarks
Fiber splicing and telecom infrastructure subs should target the same 22 to 30% gross profit and 12% net profit as any trade contractor, but T&M billing makes this harder to hit than almost any other trade. A $2.4M fiber splicing sub had one month where project costs came in at $141,000 against $144,000 in revenue, almost nothing left before overhead even hit. The rate they were charging was built on busy-month assumptions, not honest utilization across a full year.
Fiber splicing work for telecom carriers is often billed time and materials, and it comes in bursts. A crew might be slammed for six weeks on a carrier rollout, then sit underutilized for the next three. If your T&M rate was set based on how busy you are in a good month, it will not cover your costs across a full year of realistic utilization. Overhead doesn't pause between jobs just because the work does.
| METRIC | HEALTHY TARGET | WHAT WE SEE IN FIBER |
|---|---|---|
| Gross profit | 22–30% | Erodes fast in slow-utilization months |
| Net profit | 12% | Can hit near-zero in a single bad month |
| T&M rate basis | Full-year utilization | Often set on busy-month assumptions |
Case: $2.4M Fiber Splicing Sub, Visibility Into A Business That Felt Random
The owner was working hard, with skilled crews and major telecom carrier clients. But the bank account didn't make sense. Some months looked great. Some were a disaster. No pattern, no predictability. His wife was handling the books after hours, not out of carelessness, subcontractor accounting is genuinely complex, but costs weren't landing in the right places and the real financial picture was invisible.
When we cleaned up the books, the volatility had a name. T&M fiber work comes in bursts. Overhead doesn't stop between jobs. And the rates being charged were built on busy-month assumptions, not honest utilization across a full year. One month alone, project costs came to $141,000 against $144,000 in revenue. Almost nothing left before overhead even hit.
Now the owner sees his numbers every month. He knows which months are structurally profitable and which ones consume margin. He knows what his T&M rate actually needs to be. He's also actively building out structured cabling work, contracted and predictable billing, to stabilize revenue alongside the T&M work.
The Fix: Rate Built On Real Utilization
Setting a T&M rate correctly means calculating your true annual overhead and dividing it across realistic billable hours for the year, not the hours you'd bill in your best month. This is the same overhead calculation principle that applies to every trade, but it matters more here because the swings between busy and slow are so much larger.
Why is fiber and telecom subcontracting so unpredictable financially?
Fiber splicing work for carriers is usually billed time and materials and comes in bursts. Overhead keeps running during the slow periods, so a rate that only works in busy months quietly loses money the rest of the year.
How should a fiber contractor set their T&M rate?
Calculate true annual overhead and divide it across realistic full-year billable hours, not your busiest month. A rate built on best-case utilization will underprice the work over a full year.
What's a healthy profit margin for a fiber splicing subcontractor?
Target the same 22 to 30% gross profit and 12% net profit as other trades, though T&M billing volatility makes this harder to hit consistently without monthly visibility.
Can structured cabling work help stabilize a fiber contractor's cash flow?
Yes. Contracted, predictable billing from structured cabling work can offset the burst-and-lull nature of T&M fiber splicing for telecom carriers.
Former commercial construction project manager and master electrician. Managed 150+ projects totaling $2.1B+ — Google data centers, military bases, hospitals, and high-rises. CONTROL is built on what actually works in the field.
Josh founded Sulphur Prairie Management (The Construction CFO) to be the fractional CFO for commercial subcontractors.