How to Start a Plumbing Business in West Virginia: Division of Labor Certification, Fees and Exams

If you plan to start a plumbing business in West Virginia, the plumbing license WV requires is not a business license. It is a personal certification from the Division of Labor under W. Va. Code 21-14, and it belongs to the individual doing the work. The company then needs its own paperwork: a Secretary of State filing, a State Tax Division registration, and usually a city business license. This guide covers each step in the order most owners handle them, with the fees and exam rules as they stand on 2026-10-23.

This article is informational content, not legal or tax advice. Fees, rules and agency procedures change. Confirm current figures with the agency named in each step before you pay or file, and consult a qualified attorney or CPA for decisions about your entity, taxes or liability.

What You Need Before You Start

Gather these items first. Most delays in this process come from missing documents, not from the exams themselves.

• Government-issued photo ID and the personal details the Division of Labor asks for on its certification application.
• A written record of your plumbing work history: employers, dates, and the type of work you did. Experience is a condition of the master and journeyman credentials, so confirm the exact requirement on the Division of Labor site at labor.wv.gov before you apply.
• A short list of two or three business names, each checked against the Secretary of State business search at http://apps.sos.wv.gov/business/corporations/.
• An IRS employer identification number (EIN) for the company once you have a legal entity and employees or a bank account to open.
• Quotes for liability insurance and workers' compensation coverage from an insurance agent. Get these early, because many commercial customers ask for proof of coverage before they sign.
• A budget for the fees in this guide, plus the exam fee and any contractor license fees, which you must confirm with the agency that charges them.

Step 1: Sort Out Which Credentials Apply to You

A plumbing business in West Virginia usually involves three separate items, and they are easy to confuse:

1. Personal plumber certification from the Division of Labor. Under W. Va. Code 21-14, any person doing plumbing work inside a building needs one, whatever the size of the job. A repair of a single fixture counts.
2. A contractor license with the Plumbing classification from the Contractor Licensing Board. This is required when the whole project reaches $5,000 for residential work or $25,000 for commercial work.
3. Business registration with the Secretary of State (entity filing) and the State Tax Division (Business Registration Certificate). Neither one is a plumbing license.

West Virginia does not issue a separate residential plumber license and a separate commercial plumber license. As of 2026-10-23, the code has one plumber certification that covers both.

The statute also lists narrow exemptions under 21-14-3(c). They cover plumbing in your own home or a single-family home owned by your family, work by utility employees, work outside the foundation walls, plumbing incidental to HVAC work, and work in mines and industrial plants. Do not assume an exemption covers your crew or your job. Get the answer in writing from the Division of Labor before you take the work.

Step 2: Pass the Journeyman Exam

The written exams for the master and journeyman levels are administered by Prov Inc., which you can reach at 866-720-7768. Under 21-14-2, you need a score of 70% to pass. Register with Prov directly, ask for the exam fee and the scheduling options at the time you register, and confirm both with the Division of Labor if anything is unclear.

Study the plumbing code and installation practices the exam covers, then take practice questions until you pass them consistently. Do not schedule the exam around a job deadline. A retake costs time, and the rules for the master exam add a waiting period you cannot shorten.

Step 3: Plan Around the Master Exam Waiting Period

You cannot take the master exam until one year after you pass the journeyman exam. Build that year into your plan. If you intend to bid as a master plumber from the start, you will need to work under the journeyman credential in the meantime, and you should not advertise master-level work before your certificate says so.

Step 4: Apply for Your Certification and Pay the Fees

Submit your certification application through the Division of Labor (labor.wv.gov) once you have passed the required exam. The current fees are:

Credential or action	Fee
Master or journeyman plumber, initial certification	$75
Plumber in training, initial registration	$25 (the statutory cap)
Master or journeyman, renewal	$75
Duplicate certificate	$10
Late renewal fee	$25

The plumber in training category is for people learning the trade under supervision. Confirm your eligibility with the Division before you apply, because the category does not let a trainee do unsupervised work.

The certification belongs to the person, not the company. Each plumber who works on a job needs a certification of their own, so your employees cannot work under your license. If you hire a plumber, check their certificate and its expiration date before they arrive at a site.

Step 5: Renew on Time and Keep Your Records

Renewal costs $75 for master and journeyman credentials. If you miss the renewal date, expect a $25 late fee on top of the renewal fee. Check the renewal date on your certificate, put it in your calendar with a reminder 60 days before it, and keep a copy of your renewal confirmation. If the certificate is lost or damaged, request a duplicate for $10.

Step 6: Get a Contractor License If the Project Size Triggers It

The contractor license is a separate requirement from your personal certification. Apply through the Contractor Licensing Board when you plan to take on work that reaches $5,000 for residential projects or $25,000 for commercial projects. The license carries the Plumbing classification. Confirm the application fee, the exam requirements and the qualifying experience with the Board before you submit, because those details are not settled here and can change.

Working without the required license has consequences. The Division of Labor can issue cease and desist orders, and a first offense for unlicensed plumbing work carries a fine of $200 to $1,000 under 21-14-7. Repeat violations draw larger consequences, so treat the license check as a standard step before every bid.

Step 7: Form Your Business Entity

Most plumbing owners choose between a sole proprietorship and a limited liability company (LLC). A sole proprietorship needs no Secretary of State entity filing, but it offers no separation between your personal assets and business debts. An LLC adds that separation, and it is the structure most owners in this trade choose.

To form an LLC, file Articles of Organization (Form LLD-1) with the Secretary of State. Use the WV One Stop Business Portal at https://business4.wv.gov/ for online filing, or file in person. The key facts are:

• Filing fee: $100.
• Online processing fee: $1.00 on the portal.
• Standard processing: 5 to 10 business days.
• Expedited options, each in addition to the filing fee: in-person same day $25, next business day $25, 2 hour $250, and 1 hour $500.
• Name: must contain “limited liability company,” “limited company,” or one of the abbreviations LLC, L.L.C., LC or L.C. The name must also be distinguishable from every other name already registered or reserved with the Secretary of State.
• Name reservation: $15 for 120 days, at https://sos.wv.gov/reserveregister-business-name.

Your registered agent is optional. The LLD-1 asks for an agent for service of process “if any,” and the Secretary of State already acts as statutory attorney-in-fact for every entity that files organizing documents. Many owners still name themselves or another person so that legal papers reach them directly. If you name an agent, you must keep that information current, and changes are filed on Form AAO for $15.00.

If you prefer a corporation, the formation document is Articles of Incorporation (Form CD-1) with a $100 filing fee. The tax treatment differs, and the choice affects how owners pay personal and corporate income tax, so ask a CPA to compare the options for your situation.

Step 8: Register a Trade Name If You Operate Under a Different Name

If your business will operate under a name other than your legal name or your LLC name, file a trade name registration (DBA) with the Secretary of State, not a county clerk. An individual or sole proprietorship uses Form TN-1 with no filing fee. A corporation, LLC or other registered entity uses Form NR-3 with a $25.00 fee, plus a $1.00 online processing fee if you file through the One Stop Business Portal. Details are at https://sos.wv.gov/business/registration-and-waivers/register-trade-name-dba.

Step 9: Register With the State Tax Division

Every individual or business entity must obtain a Business Registration Certificate from the WV State Tax Division before doing business in the state. The one-time fee is $30.00. The certificate is permanent until the business name, location or ownership changes, and you need a separate certificate for each fixed business location. Apply on Form WV/BUS-APP or online at https://business4.wv.gov/. Registering with the Secretary of State does not satisfy this requirement.

Once you have the certificate, check whether you need a sales tax permit for any part of your work. The State Tax Division (https://tax.wv.gov/) and its business registration page (https://tax.wv.gov/Business/BusinessRegistration/Pages/BusinessRegistration.aspx) explain how the state sales tax rate of 6% applies. Ask the Tax Division whether any of your invoices carry sales tax before you write your first estimate.

Step 10: Check Your City Taxes and Licenses

West Virginia has no general statewide business license. The business and occupation (B&O) tax that applies to most shops, contractors and service businesses is levied by cities, not by the state, and the state B&O tax applies only to utilities. Cities may also charge a business license and a weekly per-worker city service fee. The state has 230 incorporated places, and 101 of them add a 1% city sales tax on top of the 6% state rate, rising to 107 from 2027-01-01.

Call the clerk for every city where you will work and ask three questions: whether a business license is required, what the B&O tax rate is for contracting services, and what the weekly per-worker city service fee is. Do not rely on the rate you find on a third-party website. Confirm it with the city.

Step 11: Calendar Your Annual Report

An LLC must file an annual report every year, between January 1 and June 30, for the calendar year following its registration. The fee is $25. A report filed after June 30 costs $75, because it includes a $50 late fee. A for-profit corporation pays the same $25 report fee, with a $50 late fee if it files late. Put June 30 on your calendar every year, and file early.

Common Mistakes to Avoid

• Letting an uncertified worker touch the job. Each plumber needs a certification of their own, and the certification belongs to them.
• Assuming a small job is exempt. The certification requirement applies whatever the job size. Only the listed exemptions in 21-14-3(c) apply, and most of them are narrow.
• Bidding a project above the contractor thresholds without a license. The $5,000 residential and $25,000 commercial thresholds are about the whole project, not the single trade. Check the total before you sign.
• Confusing registrations. The Secretary of State filing, the $30 Tax Division certificate and the city business license are three different requirements. Completing one does not satisfy the others.
• Forgetting the master exam wait. The master exam cannot be taken until one year after the journeyman exam. Plan the timeline before you quote work that depends on it.
• Missing the renewal or annual report date. Renewal late fees and annual report late fees add up quickly, and a lapsed certificate can stop work on a job site.
• Using a name you have not searched. A name that is not distinguishable from an existing registered name can be rejected, and you may lose the fee and time.

What Results to Expect

A realistic plan for a first-year plumbing owner usually includes several parallel tracks. The entity filing can often be completed within a week or two if you file online and the name is clear, since standard processing takes 5 to 10 business days and expedited options are available. The personal certification takes longer, because it depends on your exam dates and the Division of Labor’s processing. The contractor license may take longer again if you need it before you bid large projects.

Most owners who follow this sequence find that the biggest variable is the exam schedule, not the paperwork. Build a buffer into your start date, and do not promise customers a start date until your certification and any required contractor license are in hand. Timelines and outcomes vary with your experience, your city, and the agencies’ current workload.

When to Get Professional Help

Talk with a qualified attorney before you choose an entity structure, sign a contract with a partner or sell any part of the business. Ask a CPA how the LLC or corporation affects your personal and business income tax, especially under the state personal income tax rates of 2.11% to 4.58% for tax year 2026 and the 6.5% corporation net income tax. An insurance agent can explain liability and workers’ compensation coverage for your specific trades. The West Virginia Small Business Development Center (https://wvsbdc.com/) can help you plan the steps and check your timeline.

This article is informational content, not legal or tax advice. Verify every fee, deadline and requirement with the agency named above before you act on it.