Insurance for Contractors
From the job site to the truck and the crew, here is the insurance a California contractor needs before the next signed project.
Describe the work, not just the trade label
New construction, renovation and repair can carry different contract and insurance questions. Explain the work performed, project types and any specialized activities.
Read the project requirements before the start date
Contracts may request limits or endorsements beyond a basic certificate. Compare those requirements with the policy, including how completed work is treated. Tools, business vehicles and employee duties each deserve their own place in the conversation.
Coverage to consider
General liability: Job sites put your work next to property owners, other trades and the public. Limits can be matched to the projects you bid on and the contracts you sign.
Workers’ compensation: Framing, demolition and finish work carry very different physical demands. Describe each role so workers’ compensation reflects the crew you field.
Commercial auto: Trucks loaded with tools and materials are part of every project. List the vehicles, the drivers and how each one is used between sites.
Bonds, tool floaters and the insurance clause in a subcontract
Public agencies and many private owners ask contractors for bid, performance and payment bonds before work begins. A bond is a promise from a surety to the project owner that the job will be finished and the suppliers paid, and the surety expects the contractor to repay any loss it absorbs. The contractor and surety bonds page explains what a surety reviews, from financial statements to completed projects, and our guide on saving on contractor and surety bonds covers what lowers the rate.
Compressors, scaffolding, laser levels and rented machinery move from site to site, which is why tools and equipment insurance is usually arranged apart from your shop or office contents; our guide on saving on tools and equipment insurance covers deductibles and theft controls. Keep a list with serial numbers and replacement costs, and update it when you buy or rent something large. When a general contractor or owner sends a subcontract, read its insurance section alongside the insurance requirements in client contracts guide before you sign.
What does contractor insurance cost?
Trade matters more than anything else in contractor pricing. As of 2026, published premium data from national small-business insurers puts general liability for contractors at a median near $990 a year, with 44 percent of one insurer’s contractor customers paying under $75 a month. By trade, the same data runs from about $730 a year for electricians and $860 for painters to roughly $1,760 for plumbers and $1,940 for general contractors. A business owner’s policy sits near $1,370, workers’ compensation about $1,920, commercial auto on a work truck about $3,240 and tool coverage about $500. Those medians come from contractors with fewer than five employees and standard $1 million per occurrence limits. Established builders with crews, subcontractors and larger projects commonly pay well above them. They are published industry data rather than a Mithril1 quote.
Bonds show the scaling basis most plainly, since they are priced as a percentage of the bond amount. California requires a $25,000 contractor bond, and bond providers’ published rates for owners with good credit run 1 to 3 percent of that amount, so the yearly premium comes to about $250 to $750 ($25,000 × 1% to 3%). Weaker credit moves the percentage up. The rest of the package scales the same way on other bases: workers’ compensation per $100 of payroll in each trade class (our guide on saving on workers’ comp covers class codes and audits), general liability on revenue or payroll, and commercial auto per truck.
Roofing, excavation, work at heights, subcontractors without their own coverage, past claims, contracts that demand higher limits, waivers or additional insured endorsements, and drivers with violations all push a contractor’s premium higher. A clean claims history, written safety programs and subcontractor certificate tracking, a higher deductible, a business owner’s policy where the business is eligible, and payroll classified accurately by trade bring it lower. Gather those details and bring them to a quote conversation.
Guides for plumbing, electrical, HVAC and painting contractors
This page covers what every California contractor sorts out before a job starts. Each specialty trade then brings claims of its own. A slow leak behind a finished wall, a panel fire months after an inspection, a rooftop unit dropped through a skylight and overspray across a parking lot full of cars are four very different losses, and underwriters ask different questions about each.
For the questions that belong to your own trade, read our trade guides: insurance for plumbers, insurance for electricians, insurance for HVAC contractors and insurance for painters. Each one walks through the claims that trade sees most and the paperwork its customers request.
Tech campuses, public buildings and distribution centers
Contractors working on tech campuses and R&D buildings, state and county offices, hospitals or the distribution centers along the I-5 corridor and in the Inland Empire meet general contractors, property managers and building rules on every job. Commercial owners expect the paperwork in order before you mobilize, so list the property types you work on most.
Work inside occupied buildings deserves a separate mention from new construction or vacant space. Tenants, employees and the public moving around your work area change the liability picture, and contracts for occupied buildings tend to spell out working hours and protection for finished areas.
Owner-operator, specialty crew or general contractor
The role you play on a project changes the conversation. A solo tradesperson, a specialty contractor fielding a crew and a general contractor managing several trades each carry different responsibilities. Explain which role you fill on most jobs and how it shifts on bigger projects.
Moving from sub to general contractor is a major step. The trades you hire become part of your picture, so their contracts and coverage need the same attention as your own.
A few useful answers
Common questions
Does my policy cover a claim from a job I finished months ago?
Usually, through the products-completed operations part of general liability: it answers for injury or damage that shows up after the job is finished, as long as a policy is in force when it happens. Check that your contract’s completed-work terms match the policy.
Can you review a contract’s insurance section before I sign?
Yes. Send us the insurance requirements from the contract, and we can compare them with your current coverage and options before the start date.
Should I list equipment I rent for a job?
Yes. Rental companies often set their own insurance terms, so note the equipment, its value and how long you keep it.
What changes when I start working as a general contractor?
You take on responsibility for the subs you hire, so their coverage, contracts and certificates become part of your insurance conversation.
Related business guidance
Starting out on your own after years in the trade? The new-business guide explains what to sort out before your first signed job.