Operating a plumbing business involves significant risks, from work accidents to damaged property and professional liability claims. Having adequate insurance tailored to Maine plumbers is crucial to protect your financial livelihood. This guide examines the key coverages plumbers need, what impacts your insurance costs, estimated premium ranges based on your business size, how carriers calculate your rates, tips for getting optimal protection, and why working with a specialist is important. Use this information to make informed insurance decisions for your plumbing company.

For plumbers in Maine, having the right plumber insurance policies is essential. This usually includes general liability protection for plumbers to protect against third-party claims and workers’ compensation coverage for plumbing businesses to cover employee injuries on the job.

Key Factors Influencing Insurance Costs

While insurance carriers evaluate each plumber’s unique characteristics, there are common variables that affect premiums:

  • Years in Business – New plumbing contractors are viewed as higher risk than established businesses. Premiums steadily decrease as you gain experience and credibility in the industry.
  • Annual Revenue – Higher revenues indicate greater plumbing work volume, which increases likelihood of claims. Premiums rise accordingly.
  • Number of Employees – Additional employees raise the chances that one gets injured on the job, driving up workers’ compensation costs.
  • Claims History – Frequent past claims push premiums higher due to being deemed high risk. Maintaining a clean claims history helps lower insurance rates.
  • Location – Plumbing companies operating in high-crime urban areas or regions prone to natural disasters often pay higher premiums due to increased threats to property and personnel.
  • Policy Limits – Higher coverage limits mean larger potential payouts from the insurer, leading to increased premiums. Consider state minimum requirements.
  • Discounts – Ask insurers about discounts for safety measures, plumbing association membership, training, loyalty, and other criteria that may lower your premiums.

Small Plumbing Business Insurance Costs

To illustrate costs based on business size, small plumbing companies in Maine with 1 owner and 1 additional employee generating around $150,000 in annual revenue can expect approximate benchmarks of:

General Liability – $4,500 to $9,500 annually

Workers’ Compensation – $2,900 to $5,000 annually

Surety Bonds – $50 to $250 annually

The low and high ends of these premium ranges account for variables like geographic location, specific job risks, claims history, chosen coverage limits, and applicable discounts. Actual premiums are based on an insurer’s assessment of your unique characteristics and risks. Small plumbing businesses should also strongly consider inland marine, commercial auto, errors & omissions (E&O), cyber, and umbrella insurance policies.

Medium Plumbing Business Insurance Costs

Growing to a medium plumbing company with 1 owner, 3 employees, and approximately $500,000 in annual revenue, illustrative insurance premium ranges are:

General Liability – $14,500 to $22,000 annually

Workers’ Compensation – $8,700 to $15,000 annually

Surety Bonds – $50 to $250 annually

The increased number of employees and greater revenues compared to a small business leads to higher insurance costs. Medium plumbing companies would also be wise to purchase commercial auto, E&O, cyber, umbrella and other supplementary policies in addition to the major lines above.

Large Plumbing Business Insurance Costs

Scaling to a large plumbing contractor with 1 owner, 5 employees, and around $1,000,000 in annual revenue may result in the following general ranges:

General Liability – $31,000 to $41,000 annually

Workers’ Compensation – $14,500 to $25,000 annually

Surety Bonds – $50 to $250 annually

The extensive payroll and greater overall work volume necessitate higher coverage limits, which drives up premiums. On top of the major policies above, large plumbing businesses should strongly consider commercial auto, E&O, inland marine, cyber, umbrella, and other insurance lines recommended by a qualified insurance advisor or agent.

Additional Important Insurance Coverages

In addition to the major general liability, workers’ comp, auto, and bond policies discussed above, consider adding these supplementary insurance lines to your portfolio based on your specific risks:

Inland Marine – Protects your business’ tools and equipment while in transit and on job sites.

Commercial Auto – Safeguards vehicles used for business purposes like customer visits or transporting equipment.

Errors & Omissions (E&O) – Shields against financial loss arising from professional mistakes, negligent work, and liability claims.

Cyber Insurance – Covers costs related to data breaches, computer hacking, loss of digital assets and personal client information.

Umbrella Insurance – Provides additional liability coverage limits beyond your other underlying policies if their limits are exceeded.

Have an in-depth discussion regarding your company’s unique risks with an insurance professional to build a comprehensive program.

How Insurance Carriers Calculate Premiums for Plumbers

Insurance companies utilize various proprietary factors and data to calculate and determine premiums based on the estimated risk profile of an insured, including:

Class Codes – Employees are grouped into codes devised by the National Council on Compensation Insurance (NCCI) based on similar job duties/hazards. Plumbers commonly use the 5183 class code.

Experience Mod – Measures your business’ claims history experience. A higher experience mod indicates more frequent past claims, raising your premium.

Location – Insurance companies analyze the geographic region, regulatory environment, average hazards, medical costs and other location-based risk factors where your business operates.

Policy Discounts – Carriers offer premium discounts for certain qualifying risk-reducing criteria such as trade association membership, ongoing training/education, loyalty, protective safety measures, and years of experience.

Policy Limits and Deductibles – Higher liability coverage limits or lower/no deductibles raise premiums as the insurance company’s financial risk increases due to higher potential claim payouts.

Gaining insight into how these key factors are used in rate-setting allows plumbers to make informed decisions when purchasing insurance policies.

Getting the Right Insurance for Your Plumbing Business in Maine

Here are best practices when obtaining plumber insurance policies to protect your company in Maine:

Work with a Specialist – Partnering with an insurance agent or broker who specializes in plumbing contractors is highly recommended. Their expertise ensures you get tailored coverage from top regional and national carriers priced competitively for your profession’s risks.

Conduct an Annual Review – Reassess your risks as your business evolves. Changes in employees, locations, vehicles, equipment, and plumbing services provided can impact your ideal insurance mix. Meet with your agent annually.

Understand the Language – Try to read your full insurance policy forms to identify key exclusions, limitations, and legal terminology. Ask your agent to explain any confusing or concerning policy language.

Verify Asset Valuation – For property, inland marine and other asset coverage policies, confirm your tools, equipment, vehicles and other items are adequately valued to avoid underinsurance and paying more out-of-pocket for damages.

Discuss Discounts – Inquire with insurers about any discounts you may qualify for that can help lower premiums, such as for ongoing training/education, trade association membership, work experience, loyalty, and safety measures.

Compare Multiple Quotes – Be cautious of premium quotes that seem exceedingly low. It’s wise to gather a few comparative quotes from reputable regional/national carriers to find the optimal balance of premium, coverage and carrier reliability.


Obtaining the proper insurance coverage is crucial for Maine plumbing businesses to operate with confidence, knowing they are protected from the inherent costly risks of this profession. Partner closely with an experienced plumbing insurance specialist who can secure tailored policies at competitive rates. Regularly reassess insurance needs as your business evolves. With adequate insurance signed and sealed, you can focus fully on providing excellent plumbing services rather than worrying about risks outside your control. If you’re interested in becoming a licensed plumber in Maine, make sure to check our comprehensive Maine Plumbing License guide.