Plumber Insurance

What insurance does a plumber need?

Plumbers deal with water, gas and sewage, which means a single mistake can cause damage far bigger than the job itself. A loose compression fitting under a sink can leak for days before anyone notices, ruining floors, cabinets and the ceiling below.

General liability is the core policy. It covers bodily injury and property damage you cause to others, plus legal defense. For plumbers, pay close attention to:

• Completed operations coverage, because water damage often shows up after you have left.
• Water damage and mold wording. Some policies limit or exclude mold, or limit certain types of water damage. Read the exclusions and ask your agent.
• Work in multi-unit buildings. A leak in a condo or apartment can affect several units.

Workers' compensation is required in most states once you have employees. Plumbing involves lifting heavy fixtures, working in tight spaces, trenching and using torches.

Commercial auto, tools and equipment, and often a commercial umbrella complete the program.

How much does plumber insurance cost?

Plumbers are typically rated as construction trade contractors. According to Insureon's 2026 data from 100,000 small-business customers, construction businesses pay a median of:

Your own premium depends on:

• Type of work: residential service and repair is usually cheaper to insure than new commercial construction or excavation
• Gas line and sewer work, which can raise rates
• Revenue and payroll
• Number of vans and drivers
• Claims history, especially past water damage claims
• Limits your contracts require

Get an estimate with our business insurance cost calculator.

Example claims (illustrative)

• Example: You install a new water heater. A week later the supply line connection fails while the family is away, flooding the basement. The homeowner's insurer pays and then seeks repayment from you. General liability with completed operations coverage responds.
• Example: Unclogging a drain in a third-floor apartment, you damage an old pipe, and water leaks into two units below. General liability covers the property damage, up to your limits.
• Example: A customer trips over your drain machine hose in their hallway. General liability pays their medical bills.
• Example: Your employee injures his back carrying a water heater down stairs. Workers' comp pays his medical costs and lost wages.
• Example: Your sewer camera is stolen from your van overnight. Tools and equipment coverage helps replace it.

Is insurance required for plumbers?

Most states license plumbers, and many licensing boards or cities require proof of general liability, workers' compensation, a bond, or a mix of these. Requirements and minimum amounts vary by state and city, so check with your state plumbing board.

General contractors, property managers and commercial customers will also require a certificate of insurance and often additional insured status before you start work.

License bond vs. insurance

Many states and cities that license plumbing work require a surety bond, insurance, or both. They are not the same thing:

• A bond protects your customers and the licensing authority. If you break licensing rules or fail to finish work, a customer can claim against the bond. The surety pays, then you must pay the surety back.
• Insurance protects you. It pays covered claims, such as injuries and property damage, on your behalf, including legal defense.

Required amounts and limits vary by state and city, so check with your state licensing board before you buy.

Water damage: what is and isn't covered

Water damage is the most common and most expensive kind of claim plumbers face. In general:

• Usually covered under general liability: sudden, accidental damage to a customer's property caused by your work, such as a burst fitting.
• Often not covered: the cost to redo or repair your own faulty work, damage that develops slowly over a long time, and in some policies, mold.
• Check the limits: a single flood in a commercial building can exceed $1 million, which is why some plumbers buy an umbrella policy.

Ask your agent to walk you through water damage examples before you buy.

Questions to ask your insurance agent

1. How does my policy handle water damage that appears days or weeks after the job?
2. Is mold excluded or limited?
3. Are gas line work, sewer work and excavation covered?
4. Are there extra conditions for work in condos, apartments or commercial buildings?
5. Are my tools covered when left in the van overnight?

Get the answers in writing or confirm them in the policy documents before you buy.

How to lower your premium

• Pressure-test your work and document it with photos or video.
• Leave customers with written checks, such as "check for leaks in 24 hours".
• Use quality parts and follow manufacturer instructions.
• Train employees on safe lifting and trench safety.
• Collect certificates from subcontractors.
• Bundle policies and consider a higher deductible.