Workers compensation is the #1 reason fiber contractors get rejected at carrier prime prequalification. It’s also where the rules vary most state-to-state — class codes, employee thresholds, monopolistic states, owner exclusions, and waiver of subrogation. This guide covers what workers comp actually is, the two class codes that matter for fiber contractors, state-by-state rules, monopolistic-state coverage (Ohio, Washington, Wyoming, North Dakota), owner-officer exclusion tradeoffs, and what carrier primes require on your workers comp COI.
What Workers Compensation Covers
Workers comp is a no-fault insurance system covering employees injured or made ill on the job. In exchange for guaranteed benefits, employees generally give up the right to sue the employer for negligence — the exclusive-remedy protection.
Two coverage parts:
- Part One: Workers Compensation — medical care, lost wages, disability, and death benefits for employees injured on the job. Limits are set by state statute.
- Part Two: Employers Liability — liability coverage for the employer when an injured employee can sue outside the WC system (rare, but important). Standard limits: $500K bodily injury per accident, $500K disease per employee, $500K disease policy limit — often increased to $1M for carrier prime work.
Workers comp protects the employer as much as the employee. Without WC, injured employees can sue the employer for negligence, seeking pain and suffering damages, punitive damages, and legal fees — often for six or seven figures. WC provides the exclusive-remedy protection: the employee gets guaranteed benefits, the employer avoids negligence lawsuits. This is why most states require WC for any business with employees.
Class Codes 7600 vs 6325 — The Most Expensive Insurance Mistake
Workers comp is priced per $100 of payroll by class code. The single most expensive mistake fiber contractors make is using the wrong class code — either overpaying year after year or underpaying and getting hit with a six-figure audit clawback.
| Class Code | Description | Typical Fiber/Cable Use |
|---|---|---|
| 7600 | Telecommunications Company — All Other Employees | Indoor / customer-premises work: CPE install, MDU drops, structured cabling, indoor splicing |
| 7601 | Telephone & Telegraph Companies — Drivers | Drivers attached to telecom operations; sometimes split from 7600 |
| 7605 | Burglar Alarm Installation, Service or Repair | Security / low voltage / structured cabling adjacent to telecom (varies by state) |
| 6325 | Conduit Construction — For Cables or Wires | OSP crews doing trenching, conduit, directional drilling for fiber. Higher rate than 7600. |
| 5183 | Plumbing & Drain — Underground | NOT typical for fiber — listed because it’s a common misclassification at audit |
| 8810 | Clerical Office Employees | Office staff only. NEVER for field crews. Auditors look for this exact misuse. |
The single most common classification question for fiber contractors: are my crews 7600 or 6325? The answer depends on the actual work. Aerial drop install, CPE work, and indoor splicing — typically 7600. Trenching, directional drilling, manhole work, underground duct bank construction — typically 6325. Mixed-scope contractors need both codes split by payroll. Get this wrong and you’ll either overpay 15-30% year after year or face a six-figure audit clawback.
State-by-State Workers Comp Thresholds
States set the minimum number of employees that triggers mandatory workers comp coverage. For construction-class businesses (fiber and cable contractors), the thresholds are typically stricter than for other industries. Below is a sample of the largest fiber-buildout states:
| State | Mandatory At | Notes |
|---|---|---|
| California | 1+ employee | Required for any employee including part-time. Owner-officers can elect out via formal exclusion. |
| Florida | 1+ (construction) / 4+ (other) | Construction is treated separately; 1 employee triggers required coverage. |
| Texas | Voluntary | Texas is the only state where WC is optional. Hyperscaler GCs and most commercial primes require subscriber status. |
| Arizona | 1+ employee | Required for any employee. AZ ROC contractors flagged at audit if comp lapses. |
| North Carolina | 3+ employees | Counts officers and LLC members toward threshold. |
| Georgia | 3+ employees | Counts owners toward threshold. |
| Pennsylvania | 1+ employee | Strict enforcement; construction misclassification penalties are severe. |
| Tennessee | 5+ (general) / 1+ (construction services) | Construction-class fiber contractors at 1+ threshold. |
| South Carolina | 4+ employees | Owner-officers count toward threshold. |
| Michigan | 1+ employee (most cases) | Required for one or more employees. |
| Virginia | 3+ employees | Subcontractors counted toward threshold under statutory-employer rule. |
For the complete state-by-state guide including all 48 continental states, see our Workers Comp State Guide.
Monopolistic States — Ohio, Washington, Wyoming, North Dakota
Four U.S. states operate monopolistic workers compensation systems: Ohio, Washington, Wyoming, and North Dakota. In these states, workers comp must be purchased through the state fund — you cannot buy it from a private insurance carrier.
Practical implications for fiber contractors operating crews in monopolistic states:
- Register with the state fund — Ohio BWC, Washington L&I, Wyoming WSI, or ND WSI. Each has its own registration process and premium payment schedule.
- Buy Stop Gap Employers Liability from a private insurance carrier — the state fund covers medical and lost wages but does NOT cover employer liability lawsuits (Part Two coverage). Stop Gap provides that layer.
- State-specific COI — issue a state-fund WC certificate PLUS a Stop Gap Employers Liability certificate to primes for jobs in monopolistic states.
- Rate differences — state fund rates vary significantly from national voluntary market. Ohio in particular has aggressive rate audits.
Zayo’s Avetta requirements specifically call out $1M Stop Gap coverage in Ohio, Washington, Wyoming, and North Dakota. If your crews cross into any of these states and your workers comp is only state-fund, Zayo will flag the COI as non-compliant.
Owner-Officer Exclusions — The Trap
Most states allow business owners to elect to exclude themselves from workers comp, which reduces premium on the owner’s payroll. This creates a trap:
- Owner-operator excludes themselves to save $4,000/year
- Owner falls off a ladder or ATV or in a trench
- Neither their WC (they’re excluded) nor prime’s WC (they’re not the prime’s employee) responds
- Personal health insurance disputes the claim as work-related
- Owner is uninsured for their own injury
If you (the owner) physically work in the field at any point — running cable, splicing, climbing poles, driving trucks — be on the comp policy. Yes, the premium is higher. Yes, that premium is much lower than a single field injury without coverage. Owner-officer exclusions are appropriate for pure-office principals who never touch a customer site.
Additionally: many primes specifically require all working principals to be included on the comp policy and reject COIs showing owner exclusions.
What Primes Require on Workers Comp
| Prime / Portal | WC Requirement |
|---|---|
| Zayo (Avetta) | $1M/$1M/$1M Employers Liability, WC 00 03 13 Waiver of Subrogation, Stop Gap $1M in OH/WA/WY/ND |
| Crown Castle (now Zayo) | Same as Zayo |
| AT&T Fiber sub | Statutory limits + $500K/$500K/$500K EL minimum |
| Hyperscaler data center GC | $1M/$1M/$1M EL + Waiver of Subrogation; may require higher for larger campuses |
| Texas hyperscaler work | Subscriber status required; non-subscribers rejected |
| BEAD-funded prime | Statutory limits + Davis-Bacon compliance |
The key endorsement primes look for on the WC COI: Waiver of Subrogation (WC 00 03 13) — your comp carrier waives the right to sue the prime to recover claims paid. Almost universally required on commercial subcontract work.
What Workers Comp Costs — The Math
Workers comp is priced per $100 of payroll, by class code, adjusted by your Experience Modification Rate (EMR):
Annual WC Premium = (Payroll ÷ 100) × Class Rate × EMR
| Class Code | Typical Rate ($ per $100 payroll) | Example: $500K Annual Payroll |
|---|---|---|
| 7600 (Telecom — indoor work) | $3.00 – $8.00 | $15,000 – $40,000 |
| 6325 (Conduit construction) | $8.00 – $18.00 | $40,000 – $90,000 |
| 7605 (Burglar alarm / low voltage) | $2.00 – $5.00 | $10,000 – $25,000 |
| Mixed 7600/6325 split by scope | Blended | $25,000 – $65,000 |
EMR is your track record adjustment. A brand-new business starts at 1.00. Good claims history moves EMR to 0.75-0.90 (save 10-25%). Bad claims history moves EMR to 1.20-1.50+ (pay 20-50% more). Some primes reject subs with EMR above 1.00 or 1.20.
Get Workers Comp Coverage for Your Fiber Crew
Properly-coded fiber contractor workers comp with WC 00 03 13 Waiver, Stop Gap for monopolistic states, and audit-ready structure to protect against class-code clawbacks.
Request a Workers Comp QuoteFrequently Asked Questions
7600 for indoor / customer-premises work (CPE install, MDU drops, indoor splicing). 6325 for OSP construction (trenching, conduit, directional drilling). Mixed contractors need both codes split by payroll.
No, Texas is voluntary. But most hyperscaler GCs and carrier primes require subscriber status regardless of Texas law.
Ohio, Washington, Wyoming, and North Dakota. WC must be purchased through state fund; Stop Gap Employers Liability is purchased from private carrier separately.
Most states allow it, but if you work in the field, don’t. Excluded owners injured on customer sites have no coverage. Many primes also reject owner-excluded COIs.
$3-$18 per $100 of payroll depending on class code. For a $500K-payroll fiber contractor, expect $15K-$90K annually depending on scope mix and EMR.