Michigan Electrical Contractor Insurance: What the GC's Contract Actually Requires

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Michigan electrical contractor insurance is usually bought on limits and priced on payroll, and then it fails on endorsements. A shop with $1 million per occurrence and $2 million aggregate can still have a certificate rejected, or worse, be uncovered on the exact claim the contract was written to shift, because three specific endorsements were never added. If you run an established electrical contracting business in Michigan with employees, trucks and general contractor work, these are the parts of your program that actually decide whether you get paid.

The three endorsements every GC contract demands

Read almost any Michigan subcontract and you will find the same three requirements. Each one is a separate endorsement your carrier has to add.

1. Additional insured — and you need both forms

Additional insured status extends your liability policy to protect the general contractor or the owner for claims arising out of your work. The two standard ISO endorsements do different jobs:

• CG 20 10 — Ongoing Operations. Covers the GC while your crews are actively on the job.
• CG 20 37 — Completed Operations. Covers the GC for claims arising after your work is finished and accepted, within the products-completed operations hazard.

Carrying only CG 20 10 is the most common failure in contracting. It satisfies the certificate at the time of the job, and then the coverage the GC actually needs evaporates the day you demobilize. If the subcontract requires additional insured status for completed operations, and most do, you need both endorsements on the policy, not just a checked box on a certificate.

One more wrinkle: the 2013 and later editions of these endorsements narrowed coverage to what the written contract actually requires and to the extent permitted by law. Older editions are still in force on plenty of policies, so check the edition date printed on the endorsement itself rather than assuming. That means the underlying contract language now controls how much protection the endorsement delivers, which is a good reason to have someone read the insurance article of the subcontract before you sign it, not after a claim.

2. Waiver of subrogation

A waiver of subrogation stops your insurer from turning around and suing the general contractor to recover what it paid. Subcontracts routinely require it. It is added by endorsement, commonly CG 24 04 on the liability policy, and it is required separately on the workers' compensation policy, where it also carries a premium charge. It is not implied by anything else in your program.

3. Primary and non-contributory

This wording says your policy pays first and the GC's policy does not have to contribute. Without it, the two carriers fight about order of payment while your relationship with the customer deteriorates. It is added by endorsement, commonly CG 20 01.

If you are unclear on how any of this shows up on the paperwork, our guide to what a certificate of insurance actually proves in Michigan is worth ten minutes. The short version is that a certificate is evidence, not coverage; the endorsements are the coverage.

The completed operations tail is longer than you think

Electrical work causes losses on a delay. A connection made in 2026 can start a fire in 2030. That is why completed operations coverage matters more in your trade than in most.

Michigan's construction statute of repose, MCL 600.5839, sets the outer window for claims against a contractor arising out of an improvement to real property. In broad terms it runs six years after the improvement is occupied, used or accepted, with a narrower path for gross negligence that can extend the exposure but not beyond ten years from that same point. Reasonable people read the details of that statute differently and it is a question for a construction attorney, not an insurance agent. The practical takeaway does not change: your exposure on a job does not end at final inspection, and neither should your coverage.

Two consequences follow. First, never let a claims-made structure or a coverage gap sit between jobs you have completed. Second, if you switch carriers, make sure the new policy is not carrying a retroactive date or a prior work exclusion that quietly drops everything you built before the switch. That exclusion exists, it is used, and it is easy to miss.

Tools, equipment and material: your property policy is not helping

A commercial property policy covers property at the scheduled premises. Your trade lives everywhere else. Two inland marine coverages fill the gap, and they are not the same thing:

• Contractors equipment / tools floater. Covers your mobile tools and equipment as they move between jobsites and sit in trucks overnight. This is what responds to a trailer theft or a van break-in.
• Installation floater. Covers materials and fixtures you have purchased for a specific project while they are in transit, in storage, or on the jobsite awaiting installation, up to the point of acceptance. This is what responds when a gear lineup or a switchboard staged on site is stolen or damaged before it is energized.

A shop with $180,000 of gear staged for a job and a $10,000 tools floater has a real problem, and it is a very common one. Schedule the exposure to what you actually stage, not to what the tools in your truck are worth.

Hired and non-owned auto: the coverage everyone assumes they have

If an apprentice runs to the supply house in his own truck and causes an accident, the injured party sues him and your company. Hired and non-owned auto liability is what protects the business in that scenario.

Two limits people misunderstand. It is liability only: it does not pay to repair the employee's own vehicle, and it does not cover the employee's own injuries. And the employee's personal auto policy is primary for their vehicle, which is a problem of its own, because personal auto policies frequently exclude or restrict regular business use. If you regularly send people in personal vehicles, that is worth an honest conversation with your crew, not just an endorsement on your policy. Our comparison of commercial auto versus personal auto in Michigan covers where the personal policy stops.

Workers' compensation and the subcontractor problem

Comp is your biggest premium line and your biggest audit risk. Two Michigan specifics matter.

Michigan uses its own class codes. The Compensation Advisory Organization of Michigan maintains Michigan's classification manual rather than the national NCCI system, so guidance written for other states will not match your policy. Electrical wiring within buildings sits under code 5190 in Michigan's manual. Note that CAOM's entry for 5190 directs the installation of electrical machinery or auxiliary apparatus to be separately rated under code 3724 — a real premium issue for any shop doing plant machine hookups alongside building wiring. Verify your specific assignment with your agent against CAOM's own manual, and see our explanation of Michigan workers' comp class codes for why a wrong code compounds across every payroll dollar.

An uninsured sub becomes your payroll. Under MCL 418.171, a principal is liable to pay the compensation a subcontractor's injured employee would have received as if that person were directly employed by the principal. At audit, if you cannot produce a certificate of insurance for a sub, that subcontract cost gets added to your payroll and rated at your class codes, with your experience mod applied. Michigan's residual-market rules use floors of roughly 50 percent of the subcontract price for labor-and-material subs and 90 percent for labor-only subs; voluntary carriers set their own guidelines, which can differ. A 1099 does not solve this — the state has been explicit that a Form 1099 does not prove independent contractor status. Our post on 1099 subcontractors and Michigan workers' comp walks through the three-part statutory test.

The operational fix is unglamorous and effective: collect a current certificate from every sub, before they start, every year, with no exceptions. It is the cheapest premium reduction available to a contractor.

A note on licensing

Michigan electrical contractor licensing runs through LARA's Bureau of Construction Codes. An electrical contractor license requires that the applicant either personally hold a Michigan master electrician license or employ at least one full-time Michigan-resident master electrician responsible for code compliance. The master electrician license itself has substantial experience requirements, generally including several thousand hours over a period of years and time served as a journeyman.

Licensing requirements and insurance requirements are separate questions, and requirements change. Confirm your current licensing obligations directly with LARA rather than relying on any article, including this one. What we can tell you with confidence is that your contract requirements, from general contractors, owners and municipalities, will typically exceed anything the license itself demands.

Frequently Asked Questions

What insurance does a Michigan electrical contractor need?

At minimum: general liability with products-completed operations, workers' compensation for employees, commercial auto for company vehicles plus hired and non-owned auto, and inland marine for tools, equipment and installed materials. Established contractors bidding commercial work generally add a commercial umbrella, because general contractors commonly require $2 million or more in total limits, and often employment practices liability once payroll reaches a meaningful size.

What is the difference between CG 20 10 and CG 20 37?

CG 20 10 adds an additional insured for your ongoing operations, meaning while your crews are working. CG 20 37 adds them for completed operations, meaning claims that arise after your work is finished and accepted. Most subcontracts require both. Carrying only CG 20 10 leaves the general contractor unprotected on exactly the delayed-loss claims that are most common in the electrical trade.

Does hired and non-owned auto cover my employee's truck?

No. Hired and non-owned auto is liability coverage only. It protects your business against claims brought by the people your employee injured. It does not repair the employee's vehicle and does not cover the employee's own injuries. The employee's personal auto policy is primary for their vehicle, and many personal policies restrict coverage for regular business use.

How long am I exposed after finishing a job in Michigan?

Michigan's construction statute of repose, MCL 600.5839, generally runs six years from when the improvement is occupied, used or accepted, with a narrower gross negligence path that cannot extend beyond ten years from that point. The specifics of how it applies to a given claim are a legal question. For insurance purposes, plan on a multi-year tail and do not allow gaps in completed operations coverage.

Do I have to insure my subcontractors?

You do not insure them, but under MCL 418.171 you can be made to pay workers' compensation benefits to an uninsured subcontractor's injured employee as if they were your own. If you cannot produce a certificate at audit, the subcontract cost is added to your payroll and charged at your rates. Collect a current certificate from every sub before work starts.

The bottom line

The gap between an electrical contractor who gets paid on a claim and one who does not is rarely the limit. It is whether CG 20 37 was on the policy, whether the waiver was actually endorsed, whether the installation floater matched the gear staged on site, and whether every sub's certificate was on file at audit time. Those are all fixable in an afternoon, and none of them are visible on a premium quote.

We work best with established Michigan contractors — employees on payroll, company vehicles, real jobs with real contracts, and a few years of loss runs. If that describes your shop, send us your current declarations pages, one representative subcontract, and your last two loss runs. We will tell you where your certificates would fail before we talk about price. As an independent agency with more than twenty commercial carriers, we can put a contractor with a market that wants the class instead of surcharging it. Call (248) 693-6455 or request a contractor review.