
Why is business insurance a must for plumbers?
Water leaks and defective materials are among the biggest financial risks that plumbing businesses face. Plumber insurance helps cover medical bills and legal costs from injuries and accidents, and it's often required for licensing.

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6 insurance policies every plumber should consider
General liability insurance
A general liability insurance policy protects plumbers against legal expenses related to client property damage and injuries. It's often required by commercial leases and contracts.
- Client bodily injuries
- Accidental damage to client property
- Libel, defamation, and copyright lawsuits
Contractor's tools and equipment
Also known as inland marine insurance, this coverage protects your equipment wherever you bring it. That includes items in transit to job sites, stored off-site, or at a client's home.
- Saws, drills, and other tools
- Hard hats and other safety equipment
- Excavators and forklifts
Workers' comp insurance
Most states require plumbing companies with employees to carry workers' comp to help cover workplace injuries. In some states, even sole proprietors who work in construction must have this policy.
- Medical costs from work injuries
- Disability benefits
- Lawsuits from workplace accidents
Commercial auto insurance
Plumbers with business-owned vehicles must carry commercial auto coverage to comply with state laws. It helps cover financial losses in an accident, including legal costs and property repairs.
- Auto accident injuries
- Theft of a plumber's vehicle
- Auto accident property damage
Business owner's policy
A BOP bundles commercial property insurance and general liability coverage at a discount. It's often the most cost-effective type of insurance for a small plumbing business.
- Damaged client property
- Accidental client injuries
- Damage to your office or plumbing tools
Professional liability insurance
Professional liability insurance covers legal fees related to a mistake, missed deadline, or other accusation of professional negligence. It's also called errors and omissions insurance (E&O).
- Project delays and budget overruns
- Damage caused by mixed metals
- Water leaks from improper installation
Plumber insurance costs

Here's a quick look at the average cost of plumber insurance policies purchased by TechInsurance customers:
General liability: $147 per month
Tools and equipment: $42 per month
Workers' comp: $179 per month
The cost of plumbing contractor insurance depends on several factors, including the types of services you provide, your business size, claims history, and location.
Start a free application to see how much insurance will cost for your business.
What factors affect plumbing business insurance rates?
Insurance companies evaluate several factors when calculating the cost of plumbing liability insurance during underwriting, including:
- Types of plumbing services offered: The plumbing services your business provides can affect your risk level. For example, companies that offer gas line installation or sewer work services may pay higher premiums than those that only do simple plumbing work, like routine residential repairs.
- Value of business property and equipment: The value of your plumbing equipment, tools, supplies, and other business property can influence the cost of coverage, especially if you purchase commercial property insurance.
- Annual income: Higher revenue often means larger projects, more clients, and greater potential financial losses, which can increase insurance costs.
- Number of employees: Businesses with more employees typically pay higher insurance premiums because they face greater liability exposure and may have higher workers' compensation costs. A solo plumber will generally pay less for insurance than a plumbing business with a full crew.
- Coverage limits and deductibles: Policies with higher coverage limits generally cost more, while choosing a higher deductible can help lower your premium.
- Location: Where your business operates can affect rates due to local insurance requirements, claim trends, and the cost of lawsuits in your area.
- Claims history: Businesses with previous insurance claims are often viewed as higher risk and may pay more for coverage.
- Subcontractors and additional insureds: Working with subcontractors or adding clients, landlords, or general contractors as additional insureds can increase insurance costs because of the added liability exposure.
- Type of clients and contracts: Insurance premiums may also vary based on whether you work on residential or commercial properties, or government projects.
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"Even small plumbing failures can result in significant water damage, making proper insurance coverage essential for protecting your small business."
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Common questions about plumbing insurance
Find answers to frequently asked questions about plumbing contractors' insurance requirements and licensing.
Do plumbers need a license, permit, or bond?
Plumbers often need licenses, permits, and bonds to work legally or to take on certain projects.
Some states, for example, require separate licenses for sewer contractors, septic system contractors, drainage installers, or specialists who work with sump pumps and water pumps. Other states allow broader plumbing licenses that cover multiple services.
Here's a quick breakdown:
- Licenses: Most states require plumbers to get licensed in order to do paid work on their own. You usually need a certain amount of education and experience and must pay a licensing fee.
- Permits: For anything beyond minor repairs, you likely need a permit from your county or other municipality. That's especially true if you're installing new lines or doing plumbing work that connects to a city's sewer line or other municipal system.
- Bonds: Bonds are often part of the state licensing requirements for plumbers. You might also need a bond to bid on a public works project or sign a contract with a client.
Proper licensing, bonding, insurance, and permits show clients you run a legitimate, reputable business, which is essential when you're bidding on plumbing jobs.
Many homeowners or commercial clients require proof of coverage before hiring a plumber, so quickly providing a certificate of insurance (COI) can be the difference between getting (or losing) a contract.
In addition, plumbing businesses often need a license, permit, bond, and plumber liability insurance in order to do their work legally. This helps you avoid penalties and protects you financially if you face a lawsuit.
Researching your local regulations is an important first step. In addition, most states require workers' compensation insurance when you have employees, and commercial auto insurance for business-owned vehicles.
Many plumbers also need to obtain a subcontractor certification, as general contractors often require proof that anyone working under them meets certain licensing and insurance standards.Can you add a subcontractor to a plumbing contractor's insurance policy?
Yes, generally speaking, subcontractors can be added to a plumbing contractor’s liability insurance policy as an additional insured. Adding a subcontractor helps protect your business, clients, and subcontractors while they work for you.
In addition to being added as an additional insured, general contractors or clients may require subcontractors to carry their own general liability insurance and provide proof of coverage before starting work, depending on the contract terms.
Subcontractors must be properly certified and have valid business insurance to qualify for most jobs since most contractors won't allow uninsured or uncertified subcontractors to work on their projects. This reduces risk and helps ensure compliance with project and licensing requirements.
Workers’ comp requirements for contractors can be complicated to navigate, and requirements can vary by state. In some states, uninsured subcontractors may be treated like employees for workers’ comp purposes, which could leave the hiring contractor responsible for injuries or claims.
Plumbing contractors may need to request COIs from subcontractors and keep them on file, especially for larger commercial or multi-site projects. Having a COI quickly available is often essential to keep jobs moving and meet client requirements without delays.
Do plumbing companies need general liability insurance?
Yes, general liability insurance is essential for plumbing businesses. This coverage helps protect against some of the most common and expensive job-site risks, particularly water damage claims.
Even a relatively small issue like a cracked pipe, installation error, or missed connection can lead to costly and extensive property damage.
Water damage claims from plumbing incidents can average several thousand dollars per incident according to industry estimates. Commercial water damage claims averaged $89,000 in mean loss in 2019, according to Chubb.
Hidden leaks or long-term damage can drive costs much higher because of repairs, mold remediation, and restoration work.
Plumbing professionals also face increased risk during colder months, when frozen pipes can burst, leading to emergency service calls and significant property damage. These seasonal events often lead to higher claims due to the increased risk and expense.
Many plumbing businesses also consider commercial umbrella insurance an important additional layer of protection. This policy extends liability limits for general liability, commercial auto, and employer's liability policies, which can be critical when a single water damage claim exceeds base policy limits.
Even one incident can create significant financial strain without the right coverage, making general liability insurance a foundational part of risk management for plumbing contractors.
Does plumbing liability insurance protect against faulty work claims?
Plumbing liability insurance provides important coverage, but it’s critical to understand its limitations, especially when it comes to errors in workmanship.
General liability coverage often covers third-party property damage or bodily injury. However, many policies include a “your work” exclusion, which means the cost to fix the actual plumbing work itself may not be covered if an error or defect occurs during installation or repair.
Professional indemnity insurance, often called professional liability insurance, helps pay for customer lawsuits stemming from an accusation of professional negligence. That includes mistakes, oversights, and missed deadlines that financially impact a customer.
For example, suppose an improperly installed water heater leaks and damages a basement and its contents. The customer could sue the plumber for the cost of fixing the water damage, including flooring repairs, new pipes, and mold remediation.
Professional indemnity insurance covers risks, such as:
- Professional negligence
- Breach of confidentiality
- Missed deadlines and undelivered services
- Contract breaches
- Oversights and errors
- Inaccurate professional advice
Though state laws don't always require it, professional liability insurance is especially valuable for plumbers who provide diagnostic, installation, or design-related services.
Human error is inevitable no matter how careful you may be, and the out-of-pocket costs of legal action can be high. Professional liability insurance protects your business if a customer sues over dissatisfaction.
What other insurance policies do plumbers need?
Beyond those mentioned above, a wide range of plumbing insurance policies can match your business's specific needs.
Plumbing professionals, including sole proprietors, should consider the following policies:
- Builder's risk insurance covers a structure being built at a construction site, along with pipes and other materials. It's also called course of construction insurance.
- Commercial property insurance covers your office building and everything in it, including computers, tools, and furniture. It helps you recover after a fire, storm, or burglary.
- Business personal property (BPP) insurance can be added to your general liability policy as an endorsement to cover business property kept at a fixed location, such as your office.
- Installation floater coverage protects materials, fixtures, and supplies while they are being transported, stored off-site, or installed at a jobsite, helping close key gaps during active plumbing projects. You may also see this policy called inland marine insurance.
- Commercial umbrella insurance boosts the coverage on your general liability, commercial auto, and employer's liability insurance once the policy limit is reached.
- Business interruption insurance, also called business income insurance, covers day-to-day operating costs and lost income resulting from a fire or other covered property claim. You can usually add it to your property policy or BOP.
- Hired and non-owned auto (HNOA) insurance provides liability coverage when you or your employees use a personal, leased, or rented vehicle for business purposes.
- Cyber insurance, also called cybersecurity or cyber liability insurance, is recommended for businesses that handle personal information, such as credit card numbers and email addresses. It covers the steep costs of a data breach, including customer notifications, credit monitoring, legal fees, and fines.
- Contractors pollution liability insurance (CPL) protects contractors against pollution-related legal costs, such as a lawsuit over a sewage spill left at a job site.
How can you save money on plumbing contractor insurance?
With TechInsurance, you can get free quotes from top-rated insurance carriers by filling out one easy application.
There are a few other ways to get cheap plumbing insurance, such as:
- Bundle your policies. The most popular option is a business owner's policy (BOP), which pairs your general liability policy with commercial property insurance to save money.
- Customize your policy. Choose lower limits, a higher deductible, or certain exclusions to save on your premium. Additionally, picking only the policies that benefit your specific business will help you save money.
- Focus on workplace safety. A safe work environment means fewer liability claims, which helps lower your insurance costs. Keeping your job site safe, your equipment well maintained, and your employees well trained is crucial to avoiding claims.











