You're meeting a homeowner to bid a remodel and she asks, 'What insurance do you carry?' A developer sends you a contract that requires proof of $2 million in liability coverage. Your plumbing sub just got hurt on a job and you're wondering if you're covered. Your vehicle got hit by another car in a job site parking lot. These are the moments when insurance matters — and the moments when contractors realize they don't have enough, or the wrong kind, or they don't understand what they're carrying.
Contractor insurance is confusing because there are so many types, so many price points, and so much marketing fluff. Some coverage is mandatory by law. Some is demanded by customers and contracts. Some isn't legally required but will save your business if something goes wrong. And some is optional or unnecessary depending on your trade and the work you do.
This guide breaks down contractor insurance into what's mandatory, what you should have, and what's optional. No jargon, no up-selling — just what's actually important for a contractor to protect their business.
General Liability Insurance (GL): The Foundation
General liability is the most common contractor insurance. It covers liability claims if you accidentally injure someone or damage someone else's property during your work.
What GL Covers
- Bodily injury to a third party (not your employees) — you accidentally drop a tool and hit the homeowner, or the homeowner trips over your equipment
- Property damage to someone else's property — you spill paint on their hardwood floor, damage their walls, back into their car
- Legal liability and court costs — if someone sues you, GL pays for your defense attorney
What GL Does NOT Cover
- Work you did wrong (faulty workmanship) — this is a contract dispute, not liability
- Your own employees' injuries — that's workers' comp
- Your own vehicle (that's commercial auto)
- Intentional damage or criminal activity
GL Coverage Limits
GL is sold in limits like $300,000/$600,000 or $1,000,000/$2,000,000. The first number is per-incident; the second is per-year aggregate. Here's what's typical:
- $300k/$600k — Entry-level for small jobs, renovation crews, $100k jobs or less. Cost: $35-75/month.
- $1M/$2M — Standard for most residential contractors, remodels, additions. Cost: $50-100/month.
- $2M/$4M — For larger jobs, commercial work, or when customers require it. Cost: $100-150/month.
GL Cost
$1M/$2M GL coverage typically costs $50-$100/month ($600-$1,200/year) depending on your trade, location, and loss history. Electrical work and roofing cost more (higher risk) than painting or landscaping. A large established company pays less than a startup with no track record.
Workers' Compensation: Legally Required in Most States
If you have any employees, you need workers' compensation (workers' comp). It's required by law in nearly every state. It covers medical bills and partial wages if your employee gets injured on the job.
Legal Requirements
If you have even one employee, you need workers' comp in most states. Some states allow an exception for the business owner only (no employees), but as soon as you hire anyone — even part-time — you need it. Penalties for not having it are steep: fines of $5,000-$50,000+, personal liability for injuries, and criminal charges in some states.
What Workers' Comp Covers
- Medical bills for the employee's work-related injury (100% covered, no deductible)
- Wages during recovery (typically 60-66% of normal wage, up to a state-set maximum)
- Rehab and retraining if the employee can't return to the same job
- Death benefits if the injury is fatal
In exchange, your employee gives up the right to sue you for a work injury. This is the quid pro quo: they get immediate coverage without fighting in court; you get protection from lawsuits.
Workers' Comp Cost
Workers' comp is priced by payroll. For example, if you have one full-time employee making $50,000/year, your workers' comp cost might be $4,000-$6,000/year depending on the trade. Roofing and electrical are more expensive than painting or landscaping because they're higher-injury trades.
The premium is roughly 8-15% of payroll for high-risk trades, 4-8% for medium-risk trades. Your insurer calculates it based on your actual payroll each quarter.
Sole Proprietor Exception
If you're a sole proprietor with no employees, you don't legally need workers' comp in most states. However, if you're thinking about hiring someone part-time, you'll need it then. Some sole proprietors buy voluntary workers' comp to cover themselves (not required, but available).
Commercial Auto Insurance: Required If You Use Vehicles
If you drive a company vehicle to job sites or carry equipment in a vehicle, you need commercial auto insurance. Personal auto insurance explicitly excludes business use, so if you're in an accident while on a job, your personal policy won't cover it.
What Commercial Auto Covers
- Liability (if you hit someone or damage their property) — similar to GL, covers legal defense
- Collision (if you hit something)
- Comprehensive (if the vehicle is stolen, vandalized, or damaged by weather)
Commercial Auto Cost
Commercial auto runs $100-$250/month for basic coverage on a single vehicle, depending on the vehicle type, your driving record, and location. A pickup truck is cheaper than a large commercial van. A clean driving record is cheaper than a record with accidents or tickets.
Umbrella Liability: Extra Protection
Umbrella liability is extra liability coverage that sits on top of your GL and auto policies. If you're sued for more than your GL limit, umbrella kicks in and covers the excess, up to the umbrella limit.
Example
Your GL limit is $1M. A homeowner is injured on your job and wins a lawsuit for $1.5M. Your GL pays the first $1M (up to your limit), then your umbrella policy pays the remaining $500K (up to your umbrella limit). Without umbrella, you'd be personally liable for the $500K.
Umbrella Cost
$1M of umbrella coverage typically costs $15-$30/month. It's cheap insurance for serious protection. If you're doing work over $500K or have high-risk work, umbrella is smart.
Bonding: Protecting the Customer's Money
A bond is different from insurance. It's a guarantee to a third party (the project owner or lender) that you'll complete the job or refund the money. Bonds are common on large commercial projects and are sometimes required by law on public projects.
Types of Bonds
- Bid bond — guarantees your bid is serious and you'll enter the contract if you win
- Performance bond — guarantees you'll complete the job as contracted
- Payment bond — guarantees you'll pay your subs and suppliers
Bond Cost
Bonds typically cost 0.5-2% of the project value. A $100,000 job might cost $500-$2,000 to bond. On residential work, bonds are rarely required. On commercial or public projects, they're standard. The client usually covers the bond cost in the contract price.
What You Don't Need (or Can Skip)
These are types of insurance that are optional or unnecessary for most contractors:
Errors and Omissions (E&O)
E&O covers professional mistakes — if you design a roof and it fails, or specify materials that are wrong, etc. It's common for designers and architects, rare for contractors. Unless you're designing and specifying (and getting paid for it), you don't need E&O. GL covers damage caused by your work; E&O covers faulty advice.
Pollution Liability
Pollution liability covers environmental contamination. It's important if you're handling hazardous materials or working on contaminated sites. For most residential contractors, it's not necessary.
Equipment Insurance
Covers tools and equipment if they're stolen or damaged. It's optional, but if you have $20,000+ in tools, it might be worth the $30-50/month.
What Customers Typically Ask For
When you bid a job, customers often ask for proof of insurance. Here's what they usually want to see:
- General Liability — $1M/$2M is standard, $2M/$4M if it's a large project
- Workers' Compensation — proof that you're covered for employees (if you have them)
- Commercial Auto — if you're using vehicles on the project
- The customer as 'additional insured' — this means the customer is added to your GL policy, so they're protected too. It's common on larger projects and usually doesn't cost extra.
If you don't have the insurance they ask for, you can't take the job. So know what you have before you bid.
Building Your Insurance Program
Here's a recommended insurance program for different contractor scenarios:
Solo Contractor (No Employees)
- General Liability ($1M/$2M): Required
- Commercial Auto: Required (if using vehicles)
- Umbrella: Optional but smart if you do larger jobs
- Workers' Comp: Not required
- Cost: ~$100-150/month
Small Company (2-5 Employees)
- General Liability ($1M-2M/$2M-4M): Required
- Workers' Compensation: Required by law
- Commercial Auto: Required
- Umbrella ($1M): Strongly recommended
- Cost: ~$300-500/month (includes workers' comp)
Larger Company (10+ Employees, $1M+ annual revenue)
- General Liability ($2M-5M): Required
- Workers' Compensation: Required
- Commercial Auto: Required
- Umbrella ($2M-5M): Recommended
- Bonding: May be required for some projects
- Cost: $500-1,500+/month
How to Get Insurance
Insurance is sold through agents (brokers) who represent multiple carriers. To get quotes:
- Find a contractor-focused agent in your area — they specialize in contractor insurance and know what you need
- Get quotes from 2-3 agents to compare price and coverage
- Ask about discounts: bundling GL + auto, safety training, clean loss history
- Get proof of insurance (certificate of insurance) for your files and to show customers
The cheapest option isn't always the best. An agent who understands contractor work and has good claims support is worth paying a little more for. When you have a claim, you want an agent who fights for you.
Bottom Line
Contractor insurance breaks into three categories: what's legally required (workers' comp if you have employees, commercial auto if you drive to jobs), what customers demand (GL, often $1M/$2M), and what protects you (umbrella, bonds as needed). Don't over-buy (you don't need E&O unless you're designing), don't under-buy (carrying $300k GL in a $1M market loses you jobs), and review your coverage annually as your business grows. Insurance feels like an overhead cost that doesn't directly make you money, but when something goes wrong, it's the difference between staying in business and going under.