How to start a plumbing business: from license to first truck
To start a plumbing business, you generally need a plumbing license that allows you to run your own shop (often called a master or contractor license, depending on your state), business insurance, a stocked service vehicle and a pricing system that covers your real costs. Most new owners do best by picking one kind of work to start, such as residential service and repair, and building a reputation for showing up on time and fixing it right the first time.
Plumbing has one big advantage as a business: people need it whether the economy is up or down, and they need it urgently. A burst pipe does not wait for a better month. The challenge is turning that demand into a company that pays you well and doesn't eat your nights and weekends.
What license do you need to run your own plumbing company?
Plumbing is one of the more tightly licensed trades, but the details vary widely from state to state and sometimes from city to city.
In many places the license path runs from apprentice to journeyman to master, with required hours of supervised work and exams at each step. In many of those places, only a master plumber, or a business that employs one, can pull permits and operate as a plumbing contractor. Some states also require a separate business or contractor registration on top of the individual license.
Do not assume the rules where you trained apply where you want to work. Before you print business cards:
- Call your state plumbing board or contractor licensing board.
- Ask what license lets you operate a business, hire other plumbers and pull permits.
- Ask about insurance or bond requirements tied to the license.
- Check with your city or county about local registrations and permit rules.
Our contractor licensing and insurance starting point has a checklist of questions to bring to that call.
Which kind of plumbing work should you start with?
Plumbing covers very different businesses. Picking one to start makes everything else easier, from what you stock to how you market.
| Niche | What it looks like | Good for | Watch out for |
|---|---|---|---|
| Residential service and repair | Leaks, clogs, fixtures, water heaters | Fast cash, repeat customers | After-hours calls, pricing pressure |
| Drain and sewer | Clogs, camera inspections, jetting, line repairs | Higher tickets, clear specialty | Expensive equipment |
| Water heaters | Repair and replacement, tankless | Clear products, good margins | Permits, equipment cash flow |
| Remodel and repipe | Kitchens, baths, whole-house repipes | Larger jobs, planned work | Longer payment cycles, more quoting |
| New construction | Rough-in and finish for builders | Volume | Slow payment, builder pricing pressure |
A lot of one-truck shops start in residential service and repair because it gets paid on the spot and creates customers who call back. Drain and water heater work tend to follow naturally.
How much does it cost to start a plumbing business?
The honest answer is that it depends on what you already own. Rather than guess at a number, build your own list in three columns:
- Must have to take the first call: licensing and registration fees, insurance, a reliable vehicle, hand and power tools, a starting stock of common parts, a phone number, and a way to send invoices and take card payments.
- Need within the first few months: a drain machine or two, a basic camera if you plan to do drain work, a wider parts stock, a simple website.
- Can wait: jetter, specialty equipment, a second vehicle, a shop or warehouse.
Price out each line with your local supplier and insurance agent. Then add a cushion for the months when work is slower than you hoped. Many owners also keep several months of personal living expenses set aside before leaving a steady paycheck.
What should be on your truck?
A well-stocked truck saves you supply house trips, and every trip you skip is time you can bill. Start with the parts that solve the most common calls in your area:
- Supply lines, shutoff valves, fittings and pipe in the sizes you see most
- Wax rings, flappers, fill valves and complete toilet repair kits
- Faucet cartridges for the common brands in your area
- P-traps, tailpieces and drain parts
- Water heater parts: thermocouples, elements, thermostats, anode rods, relief valves
- Sealants, tape, solder, flux and primer and cement
Keep a simple restock habit. At the end of each day, write down what you used, and restock before the next morning. When you grow to more than one truck, tracking this per vehicle becomes important.
How should you price plumbing jobs?
New plumbing owners often start by charging hourly because it feels safe. Many move to flat-rate pricing within a year or two, because customers want to know the price before you start and because flat rate pays you for being fast and skilled.
To build a flat price for a task:
- Work out your cost per billable hour. Add your monthly overhead (vehicle, fuel, insurance, phone, software, tools, your own pay) and divide by the hours you realistically bill each month.
- Estimate the typical time for the task, including setup and cleanup.
- Add the parts at your marked-up price.
- Add your profit margin.
- Round to a clean number and write it down.
Do this for the twenty or thirty tasks you do most often, and you have the start of a pricebook. Many plumbing companies also charge a trip or diagnostic fee to cover the visit, with a clear policy on whether it is applied to the repair.
Emergency and after-hours rates are common in plumbing. If you offer them, decide your rates in advance and tell customers before you head out, not on the invoice.
How do you get your first plumbing customers?
Plumbing customers usually search when something is already wrong. That means being findable and reachable matters more than clever advertising.
- Answer the phone. If you can't answer while under a sink, use voicemail that promises a call back within a set time, and keep that promise. A missed call is often a customer who called the next company on the list.
- Set up your Google Business Profile with your service area, hours, photos of your truck and work, and a real phone number.
- Ask every happy customer for a Google review. Make it easy with a direct link.
- Build a simple website that lists your services and service area and has a clear "call" button and a request form.
- Partner with people who see plumbing problems first: property managers, real estate agents, home inspectors, remodelers who don't have a plumber.
- Offer a water heater flush or annual plumbing check to past customers. It brings them back and often uncovers needed work.
What systems should you set up in the first month?
Small things become big problems quickly when you are the only person in the business. Get these in place early:
- A separate business bank account and a card used only for business. Our bookkeeping basics for contractors covers the rest.
- A way to write quotes that customers can approve in writing, with photos when helpful.
- Invoicing and payment on the spot, so you leave each job paid.
- A customer list with job history. When Mrs. Garcia calls about her water heater again in three years, you want to know what you installed.
- A simple calendar that you, and later a helper, can both see.
When do you add a second plumber?
The common sign is turning down work you would like to take, or answering calls at 9 p.m. because there is no other time. Before you hire, make sure your prices can support a second wage plus the taxes and insurance that come with an employee. Often the first hire is an apprentice or helper, which raises your capacity on larger jobs while you train them.
FAQ
Can a journeyman plumber start a business? It depends on your state and locality. In many places, running a plumbing contracting business or pulling permits requires a master or contractor license, or employing someone who holds one. Check with your state board.
Is plumbing a good business to start? Demand for plumbing is steady because problems are urgent and unavoidable. Success depends on pricing correctly, answering calls quickly and building repeat customers.
Should I charge hourly or flat rate? Hourly is simpler to start. Flat rate gives customers a price before work begins and rewards efficiency. Many plumbers move to flat rate once they have a pricebook built from their own costs.
Do I need insurance before my first job? Most owners carry at least general liability and commercial auto from the start, and some licenses require proof of insurance. Talk to an agent who works with contractors.
How ServFlo helps
ServFlo is built for small service shops like a new plumbing company. Pick plumbing as your trade and you can start from a pricebook of common plumbing services and parts, then edit the prices to your own numbers. Technicians use the mobile app, which works offline in basements and crawl spaces, to quote, take photos and collect payment on site. Every plan includes unlimited technicians. See the plumbing page for more, or start a 14-day free trial.
Photo by Zoshua Colah on Unsplash.