How to Become a Plumber in 2026: Complete Licensing Guide

Plumbing is one of the most essential and well-compensated skilled trades in the United States. From installing water supply lines and drainage systems in new construction to repairing leaky pipes and maintaining water heaters in existing buildings, licensed plumbers play a critical role in public health and safety. The path to becoming a licensed plumber follows a structured progression from apprentice to journeyman to master plumber, but the specific requirements vary significantly from state to state.

This comprehensive guide covers everything you need to know about becoming a plumber in 2026, including the different licensing tiers, apprenticeship requirements, exams, fees, insurance and bonding obligations, and a full state-by-state breakdown. All data is sourced from official state licensing boards and verified across 51 states we currently track.

What Does a Plumber Do?

Plumbers install, maintain, and repair piping systems that carry water, gas, and waste in residential, commercial, and industrial buildings. The work requires strong technical knowledge, physical stamina, and a thorough understanding of building codes and safety regulations. Because plumbing systems directly affect public health -- clean water supply and sanitary waste removal -- most states regulate the profession through licensing. Improper plumbing work can lead to water contamination, gas leaks, flooding, and structural damage.

Common tasks performed by plumbers include:

• Water supply installation: Installing and connecting water supply lines, including copper, PEX, and CPVC piping. This includes connecting fixtures such as sinks, toilets, bathtubs, showers, dishwashers, water heaters, filtration systems, and pressure regulators.
• Drain, waste, and vent (DWV) systems: Installing and maintaining drainage pipes, waste lines, and vent stacks that carry wastewater away from buildings and allow proper air circulation in the plumbing system. Proper venting is critical to prevent sewer gas from entering living spaces.
• Gas line installation: Running natural gas and propane lines to appliances such as furnaces, water heaters, stoves, and fireplaces. Gas line work requires specialized training and often a separate endorsement or license in many states due to the significant safety risks involved.
• Fixture installation: Installing sinks, toilets, bathtubs, showers, dishwashers, washing machines, and other plumbing fixtures in both new construction and renovation projects. This includes ensuring proper water supply connections, drainage, and sealing.
• Troubleshooting and repair: Diagnosing plumbing problems such as leaks, clogs, low water pressure, sewer line issues, and malfunctioning water heaters using tools like pipe cameras, leak detectors, and hydrostatic testing equipment. Emergency plumbing repairs are a significant part of many plumbers' workload.
• Code compliance and inspections: Ensuring all plumbing work meets the International Plumbing Code (IPC) or Uniform Plumbing Code (UPC) and any applicable state or local amendments. This includes proper pipe sizing, fixture clearances, backflow prevention, and venting requirements.
• Commercial and industrial plumbing: Working on large-scale systems in hospitals, schools, manufacturing plants, and high-rise buildings, which often involve specialized equipment such as boilers, grease traps, medical gas systems, and fire suppression piping.

Plumbers work in a wide range of environments, from crawl spaces and basements in residential homes to large-scale construction sites and industrial facilities. The Bureau of Labor Statistics projects steady job growth for plumbers over the next decade, driven by new construction, aging infrastructure, water conservation initiatives, and the need to replace deteriorating water and sewer systems across the country.

Plumber Licensing Tiers

Most states recognize three primary tiers of plumber licensing, each with increasing levels of responsibility, autonomy, and scope of work. The exact titles and requirements vary by state, but the general progression is consistent throughout the industry.

Apprentice Plumber

An apprentice plumber works under the direct supervision of a licensed journeyman or master plumber. Plumbing apprenticeships typically last four to five years and combine on-the-job training with classroom instruction covering plumbing theory, code requirements, blueprint reading, safety procedures, and specialized skills like gas fitting and backflow prevention. Most states require apprentices to register with the state licensing board or an approved apprenticeship program before they can begin accumulating hours toward their journeyman license.

Apprentice plumbers earn a wage while they learn, typically starting at 40-50% of the journeyman rate and receiving periodic raises as they progress through the program. By the end of the apprenticeship, most apprentices are earning close to the full journeyman wage. Apprenticeships are available through unions (United Association of Plumbers and Pipefitters), non-union organizations, community colleges, and state-sponsored workforce development programs.

Journeyman Plumber

A journeyman plumber has completed the required apprenticeship hours and, in most states, passed a comprehensive licensing exam. Journeyman plumbers can work independently without direct supervision and can supervise apprentices. They are qualified to perform all types of plumbing installation, maintenance, and repair work. However, in most states, journeyman plumbers cannot pull permits on their own, bid on projects independently, or operate their own plumbing contracting business without additional licensing.

Master Plumber

A master plumber holds the highest level of plumbing license. Master plumbers can design plumbing systems, pull permits, supervise journeymen and apprentices, bid on projects, and operate their own plumbing contracting business. Most states require several years of experience as a journeyman plus passing an additional, more rigorous exam to obtain a master plumber license. Currently, 47 of 51 states we track offer a master plumber license as a distinct credential.

General Steps to Become a Licensed Plumber

While the specifics vary by state, the general path to becoming a licensed plumber follows these steps. Not every step applies in every state -- some states do not require a state license at all, relying instead on local jurisdiction requirements.

1. Meet basic eligibility requirements. Most states require you to be at least 18 years old (16 in some states to begin an apprenticeship), have a high school diploma or GED, and be physically capable of performing the work. Some states require a background check or drug screening.
2. Enroll in a plumbing apprenticeship or trade school program. The most common path is a four-to-five year registered apprenticeship that combines on-the-job training with related technical instruction. Trade school programs can provide foundational knowledge and may count toward apprenticeship hour requirements in some states. Programs are offered through unions (United Association of Plumbers and Pipefitters), non-union organizations, community colleges, and state-sponsored workforce development agencies.
3. Complete the required apprenticeship hours. Most states require between 6,000 and 10,000 hours of on-the-job training, plus several hundred hours of classroom instruction. You must document your hours carefully, as the state licensing board will require proof of completion when you apply for your journeyman exam.
4. Pass the journeyman plumber exam. In states that require it, you must pass a comprehensive exam covering plumbing codes (IPC or UPC, depending on your state), plumbing theory, safety practices, and practical applications. Exams are typically proctored by PSI, Prometric, or the state licensing board and can last four to eight hours.
5. Apply for your journeyman license. Submit your application to the state licensing board along with proof of apprenticeship completion, exam scores, and any required fees. Total initial fees across states range from $175 to $530.
6. Obtain insurance and bonding (if required). Some states require plumbers to carry liability insurance, a surety bond, or both before they can be issued a license or work independently. Check your state's specific requirements in the insurance and bonding section below.
7. Maintain your license through continuing education. Most states require ongoing continuing education (CE) and periodic license renewal. CE requirements typically cover plumbing code updates, safety training, backflow prevention, and specialized topics like medical gas systems or green plumbing technologies.
8. Advance to master plumber (optional). After gaining several years of experience as a journeyman (typically two to four years), you can pursue a master plumber license by passing an additional exam and meeting the experience requirements set by your state.

State-by-State Plumber Requirements

The table below shows the key licensing requirements for every state we track, sorted alphabetically. Click any state name to view the full requirements breakdown, including application steps, exam details, fees, and reciprocity information.

Note: Data reflects requirements as of the last verification date for each state. Always confirm current requirements with your state's licensing board before applying.

States That Do NOT Require a State License

Not every state issues plumber licenses at the state level. In some states, licensing is handled entirely by local jurisdictions such as cities, counties, or municipalities. If your state does not have a state-level plumber license, you will need to check with your local building department or municipal licensing office for specific requirements. Even in states without state-level licensing, most municipalities require some form of plumbing license or registration.

States with No State-Level Plumber License (6 states)

In the following states, plumber licensing is handled at the local or municipal level rather than by a statewide licensing board. Requirements can vary significantly between jurisdictions within these states, so you will need to contact your local building department for specifics.

States with State-Level Licensing (45 states)

Insurance and Bonding Requirements

Many states require licensed plumbers to carry liability insurance, a surety bond, or both as a condition of licensure or as a prerequisite for pulling permits and operating a plumbing business. These requirements protect homeowners and building owners from financial loss if a plumber causes property damage, performs substandard work, or fails to complete a project.

Liability Insurance

General liability insurance protects plumbers against claims of property damage, bodily injury, and negligence resulting from their work. Most states that require insurance set minimum coverage limits, typically ranging from $100,000 to $1,000,000 per occurrence. Some states also require workers' compensation insurance if you have employees. Insurance costs vary based on your coverage limits, location, business size, and claims history, but most individual plumbers can expect to pay between $500 and $3,000 per year for a basic general liability policy.

The following 25 states require some form of insurance for licensed plumbers:

Surety Bonds

A surety bond is a financial guarantee that a plumber will perform work according to applicable codes and regulations. If the plumber fails to meet their obligations, the bond provides funds to compensate the affected party. Bond amounts vary by state but typically range from $5,000 to $25,000 for plumbing contractors. The cost of a surety bond is usually a small percentage (1-5%) of the total bond amount, depending on your credit score and business history.

The following 16 states require a surety bond for licensed plumbers:

Even in states where insurance and bonding are not legally required for licensure, carrying liability insurance is strongly recommended. Many general contractors and commercial clients will not hire plumbers who lack adequate insurance coverage, and going without insurance exposes you to significant personal financial risk in the event of an accident or property damage claim.

How Much Does It Cost to Become a Plumber?

The cost of becoming a plumber depends largely on your training path. Apprenticeships are the most affordable route since you earn while you learn:

• Trade school: $1,000–$15,000 depending on the program
• Apprenticeship: Typically earn while you learn ($15–$20/hour starting wage)
• Exam and license fees: $50–$300 depending on state
• Tools: $500–$2,000 for a basic plumbing tool kit

Total out-of-pocket: $1,500–$17,000. Apprenticeships offset much of the cost since you earn a wage throughout training. See our state-by-state plumber licensing page for exact fee breakdowns by state.

Plumber Salary & Career Outlook

Plumbing offers strong earning potential and steady demand that is resistant to economic downturns. According to the Bureau of Labor Statistics (May 2024 data):

• Median annual salary: $62,970/year
• Salary range: ~$40,000 (entry-level) to $105,150 (top 10%)
• Job growth: 4% (2024–2034), about as fast as average, with approximately 44,000 openings per year

Demand for plumbers is driven by new construction, aging infrastructure that needs replacement, and fire suppression system requirements. Plumbing work cannot be outsourced or automated, providing strong long-term job security.

Advancement path: Apprentice → Journeyman → Master Plumber → Plumbing Contractor/Business Owner. Master plumbers and business owners in high-demand markets can earn well above $100,000.

Source: U.S. Bureau of Labor Statistics, Occupational Outlook Handbook — Plumbers, Pipefitters, and Steamfitters (May 2024 data).

Frequently Asked Questions

How much do plumbers earn?

According to the Bureau of Labor Statistics, the median annual wage for plumbers, pipefitters, and steamfitters in the United States is approximately $60,000, with the top 10% earning over $99,000. Wages vary significantly by state, metro area, specialization, and union vs. non-union status. Master plumbers and plumbing contractors who run their own businesses can earn considerably more, especially in high-demand markets. Apprentice plumbers typically start at 40-50% of the journeyman rate and receive periodic raises throughout the apprenticeship as they accumulate hours and complete classroom requirements.

What is the difference between the UPC and IPC?

The Uniform Plumbing Code (UPC) and the International Plumbing Code (IPC) are the two main model plumbing codes used in the United States. The UPC, published by the International Association of Plumbing and Mechanical Officials (IAPMO), is primarily used in western states. The IPC, published by the International Code Council (ICC), is used in most eastern and central states. Both codes cover similar topics -- pipe sizing, fixture requirements, venting, drainage, and water supply -- but differ in some technical details. Your journeyman or master plumber exam will be based on whichever code your state has adopted. Check the state page to see which code version your state uses.

Can I become a plumber without an apprenticeship?

In most states, completing a formal apprenticeship or an equivalent combination of education and documented work experience is required to qualify for a journeyman plumber license. Some states allow a combination of trade school or community college plumbing coursework and verified work experience under a licensed plumber to substitute for a traditional apprenticeship. However, the apprenticeship model remains the most common and widely accepted pathway into the profession. A few states with no state-level licensing may have fewer formal requirements, but local jurisdictions in those states often impose their own apprenticeship or experience standards. Check your specific state's requirements using the table above.

Do I need a license to do plumbing work on my own home?

In most jurisdictions, homeowners are allowed to perform certain plumbing work on their own primary residence without holding a plumber's license. However, you are still typically required to obtain a permit and have the work inspected by a local building inspector to ensure it meets code. The scope of permitted homeowner work varies -- some jurisdictions limit it to minor repairs such as replacing faucets or toilets, while others allow more extensive work. Major plumbing projects, particularly those involving gas lines, sewer connections, or work on the main water supply line, usually require a licensed plumber regardless of who owns the property. Always check with your local building department before starting any plumbing project.

What is the difference between a journeyman and a master plumber?

A journeyman plumber has completed an apprenticeship and passed the journeyman licensing exam. They can work independently and supervise apprentices but generally cannot pull permits on their own or operate an independent plumbing contracting business. A master plumber has additional years of experience beyond the journeyman level, has passed a more advanced exam, and can pull permits, design plumbing systems, and operate a plumbing contracting business. Not all states offer a separate master plumber license -- in some states, the distinction is between journeyman plumber and plumbing contractor. Currently, 47 states we track offer a distinct master plumber credential.

How long does it take to become a licensed plumber?

Becoming a fully licensed journeyman plumber typically takes four to five years, which includes the apprenticeship period plus exam preparation and application processing time. Advancing to master plumber requires an additional two to four years of experience as a journeyman, so the total time from start to master plumber can range from seven to ten years. Here is a typical timeline:

Next Steps

The fastest way to get started is to find your state in the table above and click through to see the full requirements, fees, and step-by-step licensing process. Each state page includes detailed information about apprenticeship programs, exam requirements, fees, insurance and bonding obligations, and renewal procedures.

• Plumber Licensing Overview -- All States
• Browse All State Licensing Guides

Sources

All requirements data in this article is sourced from official state plumbing licensing boards, departments of labor, and professional regulation agencies. Data was cross-referenced with national trade organizations for additional verification.

• Bureau of Labor Statistics -- Occupational Outlook Handbook: Plumbers, Pipefitters, and Steamfitters (bls.gov) -- wage data, job outlook, and occupation overview.
• International Code Council -- International Plumbing Code (iccsafe.org) -- plumbing code standards adopted by most eastern and central states.
• International Association of Plumbing and Mechanical Officials -- Uniform Plumbing Code (iapmo.org) -- plumbing code standards used primarily in western states.
• United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry (ua.org) -- union apprenticeship programs and training standards.
• Plumbing-Heating-Cooling Contractors Association (phccweb.org) -- industry resources, training programs, and contractor support.
• Individual state licensing board websites (cited on each state page).

Data was last verified in February 2026. Requirements can change as state legislatures update licensing statutes. We recommend confirming current requirements with your state's licensing board before applying.