Plumbing Business Insurance Cost: What You Need and What You'll Pay

TL;DR: Insureon's median premiums for plumbing businesses that buy through it are $147 a month for general liability ($1,768 a year) and $285 a month for commercial auto ($3,415 a year), updated August 5, 2026. That general liability figure is more than double what Insureon reports for electricians. Insureon says water damage risk on jobs like repiping, water heaters, and sewer work is part of the reason.

These are one broker's figures. Insureon says most of its customers have fewer than five employees, revenue from about $50,000 to over $200,000, and five years or less in business. Your quote depends on your state, your work, and your claims.

Insureon medians for plumbing businesses (updated August 5, 2026):

The typical general liability policy in Insureon's data has $1 million per occurrence and $2 million aggregate, with a $500 deductible. "Per occurrence" means the most it pays for one claim. "Aggregate" means the most it pays in a year.

Insureon lists what drives the price. For plumbers, the big one is the work itself. Commercial jobs cost more to insure than residential. So does repiping, water heater installation, and sewer or septic work, "where a failed job can result in significant water damage claims."

Picture it. A fitting you made lets go on a Friday. The homeowners are away for the weekend. By Monday, the kitchen ceiling is on the floor. That's the claim your insurer is pricing.

Other factors Insureon lists:

• Number of employees and subcontractors.
• Revenue and payroll.
• Value of your equipment.
• Years in business.
• Location.
• Limits and deductibles.
• Claims history.

A sensible order for a one-van shop. Check each item against your state, your board, and your contracts.

1. General liability. GCs and commercial customers will want proof before you start. Insureon notes some plumbers need it to sign a commercial lease or a client contract. Ask your licensing board whether your license comes with a minimum, and get the limits in writing.
2. Commercial auto, if the business owns the van. Ask your agent what your state expects for a business-owned vehicle. Using your own vehicle? Ask about hired and non-owned auto (HNOA) coverage.
3. Tools and equipment. A drain camera or jetter is expensive. Insureon says items worth over $2,500 may need to be listed separately on the policy.
4. Workers' comp when you hire. Check your state's rules before your first hire. The U.S. Department of Labor keeps a list of state workers' compensation offices.
5. A bond, if needed. Ask your licensing board and read your contracts to see whether a surety bond is needed.
6. Professional liability and umbrella as jobs and contracts get bigger. Insureon says professional liability can often be bundled with general liability, at a combined median of $150 a month.

1. Read your contracts. Note required limits and any "additional insured" requests.
2. Ask your licensing board what coverage or bond your license needs.
3. List your vans, drivers, tools and their values, payroll, revenue, and job types.
4. Get two or three quotes from an agent or broker who works with contractors.
5. Ask what's excluded. Ask specifically how the policy handles water damage from your work.
6. Download your certificate of insurance (COI). Keep a PDF on your phone. Customers will ask.
7. Put renewal dates in your calendar next to your license renewal.

At $147 a month, general liability alone is $1,768 a year. Add auto and tools and you're past $5,600. That cost belongs in your hourly rate. Our guide to pricing small business services shows how. The Plumber Pricing Calculator ($14.99) is an Excel workbook where you add your real costs, build quotes, and see the margin before you send them.

The Plumber Startup Guide ($7.99) has insurance planning prompts to help you prepare questions for an agent. It doesn't give coverage advice. For setup steps, see our small business startup checklist.

Insureon's medians: $147 a month for general liability, $285 for commercial auto, $42 for tools, and $179 for workers' comp (updated August 5, 2026). Your quote will vary.

Insureon's data shows a higher general liability median for plumbers ($147 vs $61 a month). It points to water damage risk on jobs like repiping, water heaters, and sewer work.

It depends on your state and your work. Ask your licensing board what coverage your license needs, check your state's workers' comp rules before you hire, and ask your agent about auto coverage for a business-owned van.

Often it can cover damage to a customer's property, but policies differ. Ask your agent directly how water damage from your work is handled, and read the exclusions.

A certificate of insurance. It's a one-page proof of your coverage that customers and GCs ask for.

Checked October 1, 2026.

• Insureon, "How much does plumbing insurance cost?" updated Aug 5, 2026
• Insureon, Electrician insurance cost (GL $61/mo, for comparison), updated Jul 28, 2026
• SBA, Get business insurance

This is general information, not insurance or legal advice. Coverage needs vary by state and by the work you do. Talk to a licensed insurance agent and check with your state.