Running a contracting business in California means carrying a stack of coverages that most other small businesses never think about — a state-mandated license bond, workers' compensation with rules unique to your trade, general liability that general contractors and property owners will scrutinize line by line, and protection for the tools and equipment you can't work without. Get the stack right and you win bids and sleep at night. Get it wrong and you're either uninsurable at claim time or disqualified from the job before you start.

This guide walks through every layer of a California contractor's insurance program — what the state requires, what your clients will require, and what protects the business you've built. It's written for licensed contractors and the trades, from a one-truck operation to a growing firm with crews and company vehicles.

💡 The One-Line VersionA California contractor generally needs four things to operate and win work: a CSLB contractor license bond ($25,000), workers' compensation (mandatory if you have employees — and always for C-39 roofers), general liability (usually demanded by clients and GCs even though the state doesn't mandate it), and commercial auto for company vehicles. Tools/equipment, builder's risk, and professional liability get added as the work requires.

The CSLB Contractor License Bond

Every active license issued by the California Contractors State License Board (CSLB) must be backed by a contractor license bond. As of January 1, 2023, the required amount is $25,000 (up from the prior $15,000). This is a surety bond, not insurance — it protects your customers and the public, not you. If the CSLB determines you violated the contracting laws (defective work, failure to complete, unpaid subcontractors), a claim can be paid from the bond, and the surety will then seek repayment from you.

A few related bonds come up often:

  • Bond of Qualifying Individual — required in certain cases where the qualifying person (the RME/RMO) is not a direct owner.
  • LLC employee/worker bond — contractors licensed as an LLC must file a $100,000 surety bond covering employee wages and benefits.
  • Disciplinary bond — required to reinstate a license after certain CSLB disciplinary actions.

License bonds are inexpensive and priced on credit. They are a condition of licensure — not optional — and are entirely separate from the liability insurance that actually protects your business.

Workers' Compensation — Including the Rule That Trips Up Contractors

If you have any employees, California requires workers' compensation insurance — no exceptions, no employee-count threshold. It covers medical bills and lost wages for on-the-job injuries and shields you from most injury lawsuits by employees.

The rule contractors miss: C-39 roofing contractors must carry workers' compensation even if they have no employees. Roofing is singled out in the licensing law precisely because of its injury rate. For every other classification, the CSLB requires either a workers' comp policy or a valid exemption certifying you have no employees — but that exemption evaporates the day you hire your first worker.

💡 Bollinsure TipMisclassifying workers as "independent subcontractors" to avoid workers' comp is one of the most expensive mistakes a California contractor can make. Under AB 5 and the ABC test, most workers on your jobs are employees for comp purposes, and an uninsured injury can mean stop-work orders, penalties, and personal liability. When in doubt, insure the exposure.

How Contractor Workers' Comp Is Priced

Premium is driven by your payroll, your trade's class code (roofing, framing, and excavation rate far higher than finish trades), and your experience modification (X-Mod) — a factor above or below 1.0 that rewards a clean claims history and penalizes a poor one. Managing your X-Mod through safety programs and prompt, well-handled claims is one of the biggest levers a contractor has on total insurance cost.

General Liability — Not Mandated, Always Required

California doesn't force most contractors to carry commercial general liability (CGL), but it hardly matters: general contractors, developers, property managers, and public agencies will require it before they let you on site, and the limits and endorsements they demand are often spelled out in the contract. A typical ask is $1M per occurrence / $2M aggregate.

CGL for a contractor covers third-party bodily injury and property damage arising from your operations — and, critically, from your completed work. Watch these coverage points:

  • Products–completed operations — covers property damage or injury that shows up after you've finished. For contractors this is where construction-defect claims live, so it must be included and kept in force (often for years after the job).
  • Additional insured endorsements — GCs and owners will require to be named as additional insureds, frequently on a "primary and non-contributory" basis and including ongoing and completed operations.
  • Waiver of subrogation — many contracts require you to waive your insurer's right to recover against the GC or owner.
  • Exclusions to read carefully — residential/condo/tract exclusions, EIFS, subsidence, and "your work" exclusions can quietly gut coverage for exactly the work you do.

Read the insurance requirements in the contract before you sign it, not after the loss. Half of contractor coverage disputes come down to an endorsement the contract required and the policy never had.

Tools, Equipment, and Materials

Your CGL and auto policies do not cover your own tools and equipment. That's inland marine — specifically a contractor's tools and equipment floater and, for larger machinery, a contractors equipment policy. These cover theft (a leading loss for the trades), damage, and equipment on the job, in transit, and at your yard. For borrowed, rented, or leased machinery, add rented/leased equipment coverage so you're not personally liable for a damaged rental.

Materials and fixtures you've bought but not yet installed are usually handled by installation floater or builder's risk coverage — not CGL.

Builder's Risk / Course of Construction

A builder's risk (course-of-construction) policy insures a structure while it's being built or renovated — covering fire, wind, theft of materials, vandalism, and often the soft costs of delay. On a ground-up project it's typically arranged per project and may be provided by the owner or the GC; on remodels the contractor often carries it. Confirm who is responsible in the contract, and confirm the limit tracks the full completed value plus materials.

Commercial Auto

Any vehicle titled to the business — trucks, vans, trailers — needs a commercial auto policy; a personal auto policy will deny a claim on a work truck. Contractors should look for adequate liability limits (GCs may require $1M, often via combined single limit), hired and non-owned auto coverage (for employees running errands in their own or rented vehicles), and coverage for tools/attached equipment where needed.

💡 Bollinsure TipIf employees ever drive their own cars for the business — a supply-house run, a trip between sites — you have a non-owned auto exposure even with zero company vehicles. Hired and non-owned auto coverage is inexpensive and closes a gap that surprises contractors after an at-fault accident.

Professional Liability for Design-Build

If you provide design services, design-build delivery, or professional advice — not just means-and-methods construction — a standard CGL excludes claims arising from that professional work. Design-build contractors, and any trade that engineers or specifies as part of its scope, should add contractors professional liability (or a combined "contractors E&O + protective") to cover claims of faulty design or professional negligence.

Surety Bonds Beyond the License Bond

The $25,000 license bond is just the entry ticket. On larger and especially public works projects, you'll be asked for contract surety bonds:

  • Bid bond — guarantees you'll honor your bid and furnish the required bonds if awarded.
  • Performance bond — guarantees you'll complete the project per the contract.
  • Payment bond — guarantees your subs and suppliers get paid.

Surety underwriting looks at your financials, work-on-hand, and experience — building a bonding relationship early is what lets you bid bigger jobs later. More on surety bonds here.

Certificates of Insurance and Additional Insureds — Getting Paid on Time

Practically every job now runs through a certificate of insurance (COI): the GC or owner won't release you to work — or won't release payment — until they have a certificate showing the required coverages, limits, additional-insured status, waivers, and primary/non-contributory wording. Two things save contractors real money and delay here:

  • Give your broker the contract's insurance requirements up front so the policy is endorsed correctly the first time.
  • Track certificates you request from your own subcontractors — an uninsured sub's injury or defect can roll up onto your policy and your X-Mod.

Wrap-Ups (OCIP / CCIP) on Large Projects

On big commercial or public projects you may be enrolled in a wrap-up — an owner-controlled (OCIP) or contractor-controlled (CCIP) insurance program that provides GL and often workers' comp for all enrolled parties under one master policy. If you're enrolled, understand what the wrap covers, what it excludes (off-site work, your own tools, completed operations after the project), and how your regular policies coordinate — you typically still need your own coverage for everything outside the wrap.

How to Build Your Contractor Program — A Practical Checklist

  • Confirm your CSLB bond is active at $25,000 (plus the $100,000 LLC bond if licensed as an LLC).
  • Carry workers' comp if you have any employees — and always if you're a C-39 roofer; never misclassify workers to avoid it.
  • Set CGL limits to meet the most demanding contract you bid (commonly $1M/$2M), with completed operations included and kept in force.
  • Insure your tools and equipment with an inland marine floater; add rented/leased equipment coverage.
  • Put company vehicles on commercial auto and add hired & non-owned auto.
  • Add builder's risk where you're responsible for the structure under construction.
  • Add professional liability if you design or design-build.
  • Build a surety relationship before you need bid, performance, and payment bonds.
  • Match every certificate to the contract's requirements — and collect COIs from your subs.

Frequently Asked Questions

Is general liability insurance required for contractors in California?

The state doesn't mandate CGL for most contractors, but in practice it's required by nearly every general contractor, developer, and public agency you'd work for — and the contract will usually specify the limits and endorsements. Operating without it also leaves your business exposed to construction-defect and injury claims that can end it.

Do I need workers' comp if I'm a sole proprietor with no employees?

Generally no — with a major exception: C-39 roofing contractors must carry workers' comp regardless of employees. For other trades you can certify an exemption with the CSLB while you truly have no employees, but you must obtain coverage before hiring anyone, including most workers you might think of as "subs."

Does my license bond protect my business?

No. The contractor license bond protects your customers and the public, and if a claim is paid the surety will seek reimbursement from you. Your business is protected by your insurance — general liability, workers' comp, auto, and property/equipment coverage — which is entirely separate.

What limits will a general contractor require from me?

It varies by project, but $1M per occurrence / $2M aggregate on general liability, $1M combined single limit on auto, and statutory workers' comp are common baselines — frequently with additional-insured, primary and non-contributory, and waiver-of-subrogation endorsements. Always get the exact requirements from the contract before you sign.

Sources & Further Reading

Talk to Bollinsure

Bollinsure is an independent California broker that builds insurance programs for contractors and the trades — matching your coverage to the CSLB requirements, your workers' comp class and X-Mod, and the exact contract language your clients demand. We handle certificates and additional-insured endorsements fast so you don't lose a job to paperwork, and we build the surety relationships that let you bid bigger work. If you're not certain your program would hold up on your next contract, a free review is the fastest way to find out. See our contractor insurance overview or request a review.