As a plumbing contractor bidding on major construction projects, you may be required to obtain surety bonds as a condition of project award. Surety bonds provide a guarantee that the plumbing contractor will fulfill the obligations of the underlying contract. If the plumber fails to complete the job or defaults in other ways, the surety company compensates the project owner for losses up to the bond penalty amount.

This comprehensive guide will examine key topics related to surety bonds for plumbers, including:

  • What are Surety Bonds and How Do They Work?
  • Why Plumbing Contractors Need Bonds
  • What Exposures Do Bonds Cover?
  • Types of Surety Bonds for Plumbers
  • What is the Bid Bond Process?
  • Bond Claim Scenarios
  • What is the Cost of Bonds for Plumbers?
  • How To Get Bonded as a New or Risky Contractor
  • Maintaining a Strong Bonding Relationship

Read on for an in-depth look at the essential role of surety bonds in protecting plumbing contractors and project owners from project failure or default.

What are Surety Bonds and How Do They Work?

A surety bond is a three-party agreement between the plumbing contractor, called the principal, the project owner, called the obligee, and the surety company. The surety company agrees to guarantee that the principal will fulfill the terms of the underlying plumbing contract.

If the plumbing contractor fails to complete the work or otherwise defaults, the project owner can file a claim on the bond. The surety company will then either arrange for the contractor to complete the project or pay the obligee for losses covered by the bond. This guarantee provides financial security and incentive for the plumber to adhere to the contract.

The surety bond transfers risk away from the project owner by ensuring compensation if the plumbing contractor causes damages or fails to deliver. It also prequalifies the plumbing contractor, confirming they are properly licensed, bonded, experienced, and able to take on the job.

Surety companies carefully underwrite applicants to validate their technical skills, financial strength, equipment, personnel, and operational controls can handle the desired project. This underwriting process gives the project owner assurance in the plumbing contractor’s execution capabilities.

Why Plumbing Contractors Need Bonds

While surety bonds are not mandatory everywhere, they are required to legally perform plumbing work in many jurisdictions and on public construction projects. Typical bond requirements include:

  • License and Permit Bonds: Many states and municipalities mandate plumbers carry a license and permit bond to maintain active status or work in their jurisdiction. This covers penalties if the plumber violates codes or regulations.
  • Bid Bonds: Often required when bidding on public works or large private plumbing projects. The bid bond assures the obligee you will enter into the contract if selected as the winning bidder.
  • Performance Bonds: Protects against losses if you fail to complete the plumbing project per the contractual terms. Covers costs for the obligee to hire a replacement contractor. Usually the largest bond on a project.
  • Payment Bonds: Guarantees you will pay all subcontractors and suppliers for their materials and services on the project. Protects against liens on the property.

Even when not legally mandated, many general contractors and commercial clients will require bonds from their plumbing subcontractors to share project risks. Being able to provide the proper surety bonds shows you are a qualified, bonded contractor suitable to work on major plumbing projects.

What Are State Requirements For Bonds?

Plumbing contractor bond requirements can vary significantly across different states and local jurisdictions in the United States. It is crucial for plumbers to understand the specific bond obligations in the areas where they plan to work. Here is an overview of key state plumbing bond requirements:

  • Alabama: Plumbers need license bonds up to $10,000 based on type.
  • Alaska: $10,000 license bond required.
  • Arizona: Residential plumbers need $15,000 license bond and $200,000 recovery fund bond.
  • Arkansas: License bonds from $1,000 – $5,000 required based on type.
  • California: All plumbers need a $15,000 contractor’s bond.
  • Colorado: $6,000 – $12,000 license bonds required based on license type.
  • Connecticut: $10,000 plumbing contractor license bond required.
  • Delaware: Varies locally, typically $3,000 – $10,000 bonds.
  • Florida: $20,000 plumbing contractor license bond required.
  • Georgia: $25,000 plumber license bond required.
  • Hawaii: $20,000 plumbing contractor bond required.
  • Idaho: Plumbers require $2,000 contractor license bond.
  • Illinois: $20,000 plumbing contractor license bond required.
  • Indiana: Plumbers typically need $5,000 – $10,000 license bonds.
  • Iowa: $5,000 plumbing contractor license bond required.
  • Kansas: License bonds from $2,000 – $5,000 required based on type.
  • Kentucky: $5,000 plumbing contractor license bond required.
  • Louisiana: License bonds from $10,000 – $20,000 required based on license scope.
  • Maine: Plumbers are not required to post a license bond as part of their licensing requirements.
  • Maryland: Plumbers are not required to post a license bond as part of their licensing requirements.
  • Massachusetts: Varies locally, typically $5,000 plumbing bonds.
  • Michigan: Most areas require $5,000 – $10,000 plumber license bonds.
  • Minnesota: Required but bond amounts vary.
  • Mississippi: Bonds from $10,000 – $500,000 required based on project size.
  • Missouri: License and qualifying individual bonds often required locally.
  • Montana: Bond requirements set locally.
  • Nebraska: Most areas require plumber license bonds.
  • New Hampshire: Varies locally.
  • Nevada: Contractors need license bonds from $1,000 – $500,000.
  • New Jersey: Plumbers need license bonds but amounts vary locally.
  • New Mexico: Required but amounts vary locally.
  • New York: $20,000 bond required for master plumbers in NYC.
  • North Carolina: Typically a few thousand dollar license bond required.
  • North Dakota: $4,000 plumbing work bond required.
  • Ohio: Local plumbing permit/license bonds required.
  • Oklahoma: $5,000 plumber license bond required.
  • Oregon: $10,000 – $20,000 license bonds required.
  • Pennsylvania: Some cities require plumber license bonds.
  • Rhode Island: $20,000 plumbing contractor bond required.
  • South Carolina: $7,000 – $400,000 commercial plumbing bonds required based on project size/net worth.
  • South Dakota: Public works bonds over $100,000 required. Some cities need license bonds.
  • Tennessee: License bonds up to $1 million required based on license type and project size.
  • Texas: Local plumbing license bonds required in some municipalities.
  • Utah: $15,000 – $500,000 plumbing contractor bonds required based on license type.
  • Vermont: $20,000 plumbing contractor bond required. Higher bonds on public projects.
  • Virginia: Local license bonds required in some cities.
  • Washington: $6,000 plumbing contractor bond required. Higher for general contractors.
  • West Virginia: Wage payment bonds and sales tax bonds required.
  • Wisconsin: Plumbers may need $5,000 – $25,000 license bonds.
  • Wyoming: Most cities require plumbing contractor bonds.

What Do Surety Bonds Cover?

Surety bonds strictly cover failure to satisfy your contractual obligations. The exposures depend on the bond type:

  • License and Permit Bonds: Penalize infractions of codes, laws, and permit conditions.
  • Bid Bonds: Guarantee you will enter into the contract if selected as the winning bidder and provide necessary performance/payment bonds.
  • Performance Bonds: Compensate for failure to complete the contracted plumbing work properly or on schedule. This accounts for most losses.
  • Payment bonds: Cover failure to pay subcontractors and suppliers for labor/materials per your contracts. Protects against liens.

Surety bonds do NOT cover general business liabilities like injury claims, property damage, faulty workmanship corrections, cost overruns, etc. These are insured under your standard business insurance policies. The surety bond simply guarantees your base contractual compliance.

Types of Surety Bonds Used By Plumbers

There are several types of surety bonds that plumbers need to be familiar with:

  • License and Permit Bonds: Required by many jurisdictions to maintain an active plumbing contractors license or obtain permits. Covers fines for violations. Typically $5,000 – $10,000.
  • Bid Bonds: Guarantee you will enter into the contract if awarded the project. Usually set at 5-10% of the total bid amount.
  • Performance Bonds: Protects against default. Equal to 100% of the contract price.
  • Payment Bonds: Guarantees you will pay subcontractors and suppliers. Usually 30-50% of contract price.
  • Maintenance Bonds: Warranties corrections for defective work during a set period post-completion, usually 1-2 years. 25% of contract price.

You may need to obtain a combination of bonds on a large plumbing project. The specific requirements will be detailed in the project specifications.

What is the Bid Bond Process?

Bid bonds support contract bidding by guaranteeing the plumbing contractor will enter into the contract if they are the winning bidder. Here are key aspects of the bid bond process:

  • The project specifications indicate if a bid bond is required and the dollar amount. Usually 5-10% of total bid.
  • Obtaining a bid bond indicates the plumbing contractor has bonding capability and is serious about taking on the project.
  • The bid bond is submitted with the project bid to prove bonding ability. This makes the bid responsive.
  • If the contractor wins the bid, they move forward with formal contract execution and providing required performance/payment bonds.
  • Contractors who win bids but fail to enter into the contract forfeit their bid bond to compensate the loss.
  • Unsuccessful bidders do not forfeit their bid bond. It shows they participated in good faith.

Bid bonds prequalify bidders and create disincentives for inflated bids. Plumbers bidding on public or major projects should expect to provide these bonds.

Bond Claim Scenarios

Project owners will file a claim against surety bonds if the plumbing contractor fails to satisfy the bonded contractual obligations. Common claim scenarios include:

License and Permit Bonds:

  • Performing unlicensed plumbing work illegally.
  • Violating permit conditions like doing unauthorized work.
  • Failure to pull required permits before starting plumbing work.

Bid Bonds:

  • Refusing to enter into contract after winning the bid.
  • Being unable to obtain required performance/payment bonds.
  • Withdrawing bid and refusing the contract.

Performance Bonds:

  • Failure to complete all contracted plumbing work.
  • Breaching warranties or guarantees.
  • Failure to meet quality standards or compliance requirements.
  • Defaulting due to bankruptcy or closure.

Payment Bonds:

  • Failure to pay subcontractors, suppliers, and laborers their contracted amounts.
  • Subcontractors placing liens on the property for nonpayment.

The surety investigates claims and compensates valid losses up to the bond penal sum. Plumbers should avoid claim situations through proper licensing, permitting, bidding practices, contract execution, financial planning, and project management.

What is the Cost of Surety Bonds for Plumbers?

Surety companies charge an annual premium based on the bond type and amount. Typical rates range from 1-3% of the bond penal sum. For a $100,000 license bond, the premium may be $1,000 – $3,000 per year. On a $1 million performance bond, an annual premium might run $10,000 – $30,000.

Factors that influence surety bond premiums include:

  • Penal bond sum amount. Higher sums mean higher premiums.
  • Plumbing contractor’s financial strength and stability. Weak firms pay more.
  • Company experience, reputation, and capabilities. New firms pay more.
  • Contract terms, risks, and probabilities of default. Complex projects cost more.
  • Surety company’s underwriting guidelines and rates.
  • Local bonding regulations and requirements. Some regions cost more.

Established licensed plumbing contractors with solid finances/operations can often secure reasonable premium rates. Weaker companies may need collateral or pay very high premiums to obtain bonds. Overall though, premium costs are standard for running a plumbing business seeking major construction projects. Here you can learn more about the cost of surety bonds for plumbers.

How Can Plumbers With Poor Credit or Finances Get Bonded?

Sureties evaluate three key criteria when deciding to approve a plumbing contractor for bonding:

  • Capacity: Your technical skills, experience, personnel and equipment to perform the plumbing work properly.
  • Capital: Your financial health, credit history, working capital, and net worth.
  • Character: Your company reputation, past performance, integrity, and professionalism.

Plumbers with poor personal credit, corporate finances, or limited operational history will often face greater underwriting scrutiny. But there are steps you can take to improve bondability:

  • Offer explanation and documentation to demonstrate past financial issues were temporary anomalies or isolated events rather than permanent weaknesses or mismanagement.
  • Seek smaller bond amounts to start as a way to demonstrate you are a reasonable underwriting risk. Aim to build up higher bonding capacity over time.
  • Present to the surety your qualifications, training licenses, equipment, key personnel, safety procedures, etc. to showcase your technical capacity even if finances are less stable.
  • Provide the surety with strong client references and testimonials regarding past quality work, reliability, and standing in the plumbing community.
  • Offer collateral such as letters of credit or liens on property to offset perceived risks of weak finances.
  • Applying through a plumbing contractor group program may provide the extra backing needed to get approved.
  • Work with a knowledgeable surety bond producer who can advocate to the surety on your behalf.

Reputable plumbers with sound technical capabilities can often obtain bonding even with some financial or credit concerns. The key is being transparent and demonstrating you are a reasonably good underwriting risk overall.

How Do Plumbing Contractors Get Surety Bonds?

You’re right – the process of actually obtaining surety bonds is important for plumbers to understand. Here are some tips on buying bonds and why working with a specialist is advisable:

Purchasing Surety Bonds As A Plumber

The most effective way for plumbers to obtain surety bonds is to work with an established surety bond producer that specializes in the plumbing trade and represents multiple surety carriers. There are several advantages to using a specialist:

  • They understand the unique risks and exposures of plumbing contractors. This helps tailor the right bond types and coverage amounts.
  • They represent multiple surety carriers. This allows competitive quotes and maximum eligibility to find bonds despite credit/financial challenges.
  • They can advise on local bond regulations and requirements for plumbers in your state or municipality. Ensures compliance.
  • They advocate for the plumber during underwriting. This facilitates approval and best terms/rates.
  • They handle all paperwork, documentation, renewals, and compliance. Bonds stay current.
  • They assist with claims handling and procurement of bond replacements if needed.

General insurance agents who do not specialize in surety bonds may not represent multiple surety carriers or understand nuances facing plumbers. This can limit options.

Going direct to a surety carrier without an intermediary producer can also be challenging for plumbers:

  • Carriers may decline to underwrite individual contractors they view as too small. Producers get around this.
  • Paperwork, financial disclosures, and processing requirements can be arduous for contractors without expert support.
  • Lack of advocacy during underwriting may lead to denials or bad terms where a producer could negotiate improvements.
  • Ill-informed decisions on bond type or amount selection are more likely without an advisor.

The best approach is to have an expert surety bond producer guide plumbers through education, market access, paperwork, compliance, renewals, claims, and everything bonding-related. Their expertise and advocacy is well worth the modest producer commission.

Maintaining a Strong Bonding Relationship

Once initially approved for bonding, plumbers must continue exhibiting the 3C’s of capacity, capital, and character to maintain bondability. Smart practices include:

  • Pay premiums and renew bonds on time to keep coverage continuous. Lapses raise concerns.
  • Build up bonding capacity gradually over time through good project performance.
  • Maintain proper licensing and continue plumbing education/training. Stay current on codes.
  • Perform responsibly on jobs and develop a reputation for meeting contract obligations. Limit bond claims.
  • Manage finances prudently including proper AP/AR management, controlling overhead, and maintaining profitability and liquidity.
  • Proactively communicate any issues, disputes, delays, or changes on bonded projects to avoid surprises or claims.
  • Provide timely financial statement updates to the surety so they can monitor the company’s ongoing health.

By demonstrating the capacity to handle larger plumbing projects successfully over time, plumbers build up bonding capacity and maintain continuous access to surety support. This enables bidding on ever-larger public and commercial jobs.


Bonding is an essential component for plumbing contractors seeking public works and large private construction projects. Bid, license, permit, performance and payment bonds provide financial security and qualification pre-approval for project owners. By partnering with an experienced surety bond producer, plumbers can navigate the underwriting process to secure bonding support critical to elevating their business capabilities and opportunities. Maintaining robust technical expertise, financials, risk management, and transparent communication preserves the bonding relationship over the long-term.