To start a plumbing business, you first need the license your state or city requires to run a plumbing company, which in some states means a master license, or a licensed master who supervises the company’s work. Then insure and bond the business, set prices that cover your true costs, put every job in writing, and build a steady flow of calls from local search, reviews and trade partners.
Here’s each step, with official sources. This is general information, not legal, tax or insurance advice. Plumbing licensing varies by state and city, so confirm the rules with your plumbing board, an insurance agent and an accountant.
The short checklist:
According to the Bureau of Labor Statistics, most states and some localities require plumbers to be licensed. Requirements vary, but they often include 2 to 5 years of experience and an exam before a plumber can work independently. The usual path is a 4- or 5-year apprenticeship, with about 2,000 hours of paid on-the-job training each year plus technical instruction. After the apprenticeship and an exam, a plumber becomes a journeyman; with several more years of experience and another exam, a master. Some states require master status for a plumbing contractor’s license.
For an owner, the key point is that the license that lets you do plumbing isn’t always the one that lets you run a plumbing company. Four examples from official sources, checked October 16, 2026:
The BLS also notes that some states require a special license for gas line work, so ask about any specialty work you plan to offer. Find your state in the ECHOPS license guides, confirm with your plumbing board, and ask each city’s building department what it needs before it issues a permit.
Find an agent who insures plumbers, and tell them exactly what you do: service, new construction, gas, sewer or commercial work. The coverages to ask about:
Bonds are separate from insurance. Some licenses require one, like California’s $25,000 bond, and larger commercial or public jobs may require contract bonds. The SBA guarantees bid, performance and payment bonds from certain surety companies, so small businesses that might not meet a surety’s usual criteria can get bonded on contracts up to $9 million (non-federal) or $14 million (federal).
Stock the van for the calls you’ll take first: drain machines and augers, a camera if you’ll do drain diagnosis, cutting, joining and press tools for the pipe types in your area, a torch and soldering kit, a wet vac, safety gear, and a parts stock of the fittings, valves, supply lines and repair parts you use most. Rent or sub out rare work until it’s frequent enough to own the tools.
A few federal rules apply to everyday plumbing work:
Both methods work if the numbers behind them are right. The difference is who carries the risk when a job runs long.
You can also mix them: a trip or diagnostic fee, flat-rate prices for common repairs, and hourly or quoted pricing for remodels and new construction. Set your after-hours and emergency pricing before the first 2 a.m. call.
Whichever you choose, start from a true labor rate. The BLS median wage for plumbers, pipefitters and steamfitters was $30.67 an hour in May 2025. Add payroll taxes, insurance, benefits, unbilled time and overhead, then your margin; the labor rate calculator walks through it.
A hypothetical flat-rate price for a water heater swap: say it takes 4 hours at a true labor cost of $70 an hour (a made-up number), parts and materials cost $1,400, and permit and disposal cost $150. The cost is $1,830. At a 35% target margin, divide by 0.65 for a flat price of about $2,815. Track actual times and adjust. Our post Markup vs. margin explains why you divide instead of adding 35%.
Put the price in a written estimate and, for bigger jobs, a signed contract. The free estimate template and contract template are a start; have a local attorney adapt the contract to your state.
Bill the day you finish. The free invoice template lists what to include.
At first, a phone, a calendar, estimates and invoices are enough. Once you’re running more than a few calls a day, look for scheduling and dispatch, a price book for flat-rate pricing, photos filed on each job, e-signatures, time sheets and job costing. Ask any vendor whether techs can see the day’s calls and history on their phones, whether you can price from your own price book, whether customers can sign from a link, and whether you can export your data any time.
It depends on your state. The BLS notes that some states require master status for a plumbing contractor license. In Texas, contracted plumbing work is supervised by a Responsible Master Plumber, who must hold a Texas master plumber license and can serve only one company at a time. Check with your state plumbing board.
Usually several years. The BLS describes a 4- or 5-year apprenticeship, a journeyman exam, then more experience and another exam for master status. In Texas, the journeyman exam needs 8,000 hours of experience, and the master exam needs a journeyman license held two years, or one year plus an approved apprenticeship program.
Both work when they cover your true labor rate, overhead and margin. Flat rate gives customers a price up front and rewards efficient work but puts overruns on you. Hourly protects you on messy jobs but hides the total. You can also mix them, with flat rates for common repairs and quotes for larger work.
Ask an agent about general liability, including how water damage from your work is covered, commercial auto, tools and equipment coverage and umbrella limits. With employees, the SBA lists workers’ compensation, unemployment and disability insurance as required, and some states require more.
Fees vary by state. In Texas, for example, the master plumber path includes a $25 exam processing fee, a $128.50 exam fee, a $75 certificate and card fee and a $75 initial license fee. Check your own board for current fees.
Keep it short and practical. Cover the services you’ll offer (service, new construction, gas, sewer or commercial), the license you need to run the company, the insurance and any bond it requires, whether you’ll price flat-rate or hourly, your van and tool costs, and where your first customers will come from, like builders, remodelers and property managers. Update it as real job numbers come in.
Set up a Google Business Profile with your service area, hours, photos and license number where required. If you take emergency calls, answer them, because a burst pipe goes to whoever picks up. Work for remodelers, builders and general contractors, reach property managers and real estate agents, and ask for reviews after every job that went well. See ECHOPS for plumbing companies.
Once you’re running more than a few calls a day, add scheduling and dispatch, a price book for flat-rate pricing, photos filed on each job, e-signatures, time sheets and job costing. Track how long tasks actually take and adjust your flat prices, keep your license and certificate of insurance ready for trade partners, and bill the day you finish. Fast answers matter too; see speed to lead.
ECHOPS prices jobs from your price book with your own markups, so flat-rate repairs and quoted jobs come out the same way every time, and customers can choose options and sign by e-signature. Service calls have statuses, a map, a route planner and warranty dates, and job photos and videos from your phone are filed on the job. Invoices handle deposits and progress payments; clients pay invoice links by card, Apple Pay, Google Pay or ACH, and ECHOPS records checks and cash too. Review requests and time sheets are built in. Try it free for 14 days, no credit card.
Posts are general information, not legal, tax or financial advice.
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