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Starting a trade business

How to start a plumbing business, from license to first service call

By Yossi Grunwald, founder of Workeey · Updated

Plumbing is not a trade you can start the week you decide to. The license comes first, and the license comes from years of supervised work. If you're already a journeyman or master, the business side is the step in front of you: a contractor license if your state has one, insurance, a stocked truck, prices that cover a service call, and a way to get paid on the spot. Here's the whole path, including the part you can't shortcut.

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The path: apprentice, journeyman, master

If you have no experience, a plumbing business starts with an apprenticeship, not a business license. The U.S. Bureau of Labor Statistics, in its handbook page updated October 2026, says plumbers typically train through a 4- or 5-year apprenticeship with about 2,000 hours of paid on-the-job training each year plus technical instruction. It says most states and some localities require plumbers to be licensed, that licensing usually takes 2 to 5 years of experience and passing an exam, and that experienced journey-level workers can go on to master status.

Your state decides what each level is allowed to do, and in many places only a master, or a business that employs one, can run a plumbing contracting business and pull permits. Look up your state's plumbing licensing board for the exact rules.

How much work you can take on before you need a license is different in every state: see the contractor license limits for every state, with each state's own board linked.

  1. Apprentice: paid work under a licensed plumber, plus classroom hours
  2. Journeyman: licensed after the required hours and an exam
  3. Master: more years and another exam, often what a business needs to operate
  4. Contractor or business license: in many states, a separate step on top of the trade license

Decide what kind of plumbing you'll do

A one-truck plumbing business does best with a clear focus, because each kind of work needs different stock, tools and hours. Service and repair keeps the phone ringing and pays the same week. New construction brings bigger jobs but slower payment and more dependence on a few builders.

Pick what you're best at and what your area needs, then let the work you turn down tell you what to add next.

  • Service and repair: leaks, clogs, fixtures, running toilets
  • Water heaters: repair and replacement, tank and tankless
  • Drain and sewer: cleaning, camera inspection, line repair
  • Remodels: kitchens and bathrooms, often alongside other trades
  • Emergency calls: nights and weekends, at a higher rate

Set up the business

Choose a structure with your eyes open. The SBA explains that a sole proprietorship is easy to form and gives you complete control, but leaves you personally liable for the business's debts, while an LLC protects your personal assets, like your vehicle, house and savings, in most instances. Plumbing carries real risk of water damage, so read the SBA's comparison and ask an accountant and an attorney which fits you.

The EIN costs nothing: the IRS says you never have to pay a fee for one, and its online application issues the number immediately when approved. Open a business checking account before the first invoice, and check whether your state wants your business name on the license itself.

  1. Confirm which license your business needs to operate and pull permits
  2. Register the business name with your state
  3. Choose sole proprietor or LLC after reading the SBA's guide
  4. Apply for a free EIN on the IRS site
  5. Open a separate business checking account

Stuck on the name? The free plumbing business name generator puts names together from your own name, your town and plumbing words. We don't check that a name is free, so check the one you pick before you register it.

Insurance and bonds

One failed fitting behind a wall can flood a kitchen, and a homeowner's insurer will look for whoever touched it last. General liability insurance is the baseline; the SBA describes it as covering financial loss from bodily injury, property damage and defending lawsuits. Many states and cities also ask licensed contractors to carry a license bond, so check your licensing board's requirements.

Commercial auto insurance for the truck is worth asking an agent about, and the SBA's insurance guide lists workers' compensation as required for every business with employees, so plan for it before you take on a helper.

The truck and the stock

A service plumber's truck is a rolling warehouse. Every trip to the supply house is an hour you can't bill, so stock the parts you use every week and keep a list of what's running low. Start with the tools you already own from your years working for someone else, and buy the expensive specialty equipment, such as a sewer camera or a jetter, only when the jobs justify it. Many supply houses rent them.

Shelving and bins pay for themselves. A truck where you can find a fitting in ten seconds is a faster truck.

  • Hand tools: pipe wrenches, cutters, a press or crimp tool, torch kit
  • Drain tools: augers and a drum machine sized to the work you take
  • Common stock: supply lines, valves, fittings, flappers, wax rings, cartridges
  • Safety and protection: drop cloths, shoe covers, a wet vac

Set your prices: the service call and the job

Most service plumbers charge a service call or trip fee to show up and diagnose, then price the repair. Service call fees and trip charges explains how others handle it. Build your hourly rate from your truck, insurance, stock and the hours you can bill with the hourly rate calculator, and set a parts markup with the markup calculator.

For context, the Bureau of Labor Statistics put the median pay of plumbers, pipefitters and steamfitters at $30.67 an hour, or $63,800 a year, in May 2025. That is what employees earn on a wage, not what a business should bill: your rate has to carry everything the employer used to pay for. A plumbing price book keeps your flat prices the same from one customer to the next, and how to price a job walks through the pieces.

Your first customers

Leaks don't wait, so the plumber who answers the phone often gets the job. In the first months, being reachable and showing up on time builds more business than any ad.

  • Tell the contractors, builders and property managers you've worked with that you're on your own
  • Set up a free business listing on the main map and search sites, with your license number
  • Partner with handymen, who need someone to pass plumbing work to
  • Ask every satisfied customer for a review the same day
  • Put your number on the water heater you install, where the next call will start

Estimates, invoices, records and taxes

Write the price down before you open a wall, and get the customer's yes before you go over it. Invoice before you leave the driveway when you can; a customer who just watched the water stop is the one most ready to pay. A plumbing work order keeps what was asked and what was done in one place.

Keep receipts for every part and every gallon of fuel. The IRS says records should support the income and deductions on your return and be kept as long as needed to prove them.

On taxes, the IRS treats net self-employment earnings of $400 or more as subject to self-employment tax, which covers Social Security and Medicare. If you expect to owe $1,000 or more, it generally expects estimated payments across the year's four payment periods. Ask an accountant to set the amount.

Running it from your phone with Workeey

Workeey puts the office in your pocket. Each job holds the client, the address, the time slot, notes, typed or dictated, and photos of what you found and what you fixed. Your schedule runs in time slots with a route to the next call.

Your rates live in Settings: hourly, travel, call-out as the least a job costs, first hour, evenings and weekends, parts markup and a deposit percent. A quick estimate prices from them, and you share it from your phone as a quote PDF. The customer says yes to you, not in the app.

One tap turns it into the invoice, emailed with a pay link for card, Apple Pay, Google Pay or US bank transfer through your own Stripe account; a small processing fee applies. Switch on reminder texts on an invoice that runs late, and log parts as expenses by hand or from a receipt photo. The free plan has unlimited invoicing and 23 quick estimates a month, no card (pricing).

On paper instead? Use the plumbing invoice template and the plumbing estimate template, or compare the best apps for plumbers.

More for plumbers: pages and free templates

Can I start a plumbing business with no experience?

Not as the licensed plumber. The BLS says most states require a license, which usually takes years of experience and an exam. You can start the path through an apprenticeship, or own a business that employs a licensed plumber where your state allows it.

Do I need a master plumber license to own a plumbing business?

In many states the business needs a master plumber or a contractor license holder, but rules differ. Check your state's plumbing licensing board.

How long does it take to become a licensed plumber?

The BLS describes a 4- or 5-year apprenticeship and says licensing typically requires 2 to 5 years of experience plus an exam.

What insurance does a plumbing business need?

General liability is the baseline, workers' compensation once you have employees, and often a license bond your state sets. Ask an agent about commercial auto for the truck.

Should a plumber charge a service call fee?

Many do, to cover the drive and the diagnosis. See service call fees and trip charges.

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