State-level insurance minimums for low-voltage contractors are usually the starting line, not the finish. Commercial project owners and general contractors routinely require more than the state requires.
General Liability (GL)
State minimums for GL range from $300,000 (Texas, Florida, Georgia, Maryland) to $1,000,000 (California). For commercial projects under $500K total scope, $1M per occurrence / $2M aggregate is typical. For larger projects, $2M / $4M is common; for owner / GC contracts, $5M / $10M or higher is sometimes specified.
A standard commercial GL policy for a low-voltage installer covers bodily injury, property damage, products and completed operations, and personal injury. The completed-operations endorsement is critical - it's what protects you after the install is done.
Workers Compensation
Required in essentially every state if you have employees. Sole proprietors with no employees can usually waive workers comp on themselves, but the moment you have a single W-2 employee the state mandate kicks in. Rates vary substantially by state and by job classification code; low-voltage electrical typically falls in the 5421 NCCI classification range, which is mid-tier among construction trades.
Commercial Auto
If you operate vehicles for business (even a personal pickup used to drive to job sites), you typically need commercial auto. State minimums are low - usually $25K/$50K liability - but project specifications often call for $1M combined single limit on commercial auto.
Umbrella / Excess Liability
Bridge between GL/auto/workers-comp limits and what a project specifies. Common to carry $1M-$5M of umbrella over the primary lines. Cost-effective insurance because the underlying lines absorb most claims and the umbrella rarely pays.
Contractor Bond
Required by some states for low-voltage contractor licensing: California ($25K), Nevada ($1K), Washington ($4K), Arizona ($5K), Idaho (varies). Distinct from project-specific surety bonds, which are negotiated per project for large public-works installs.
Professional / Tech E&O
Not state-mandated but increasingly required by commercial buyers in tech-adjacent installs (cloud video, cloud access, AI analytics). E&O covers claims of negligence in design or recommendations. Particularly relevant if you're acting as a designer-of-record on a CTS-D, RCDD, or similar engagement.
How to think about it
The state minimum is the bare floor to keep your license. The commercial bid spec is the actual operating reality. A growing low-voltage business that wants to bid commercial work above $250K should carry:
- $2M/$4M GL minimum
- Workers comp on every employee
- $1M commercial auto
- $1-5M umbrella
- Project surety bonds for any public-works engagement
- Professional E&O if doing design work
An insurance broker who specializes in construction or low-voltage specifically will be substantially more useful than a general-business broker.