You can find a slab leak by feel and re-pipe a house in your sleep. That was never the question. The question is whether the business around the pipe holds together: whether you are licensed to sign your own permits, insured against the flooded kitchen, priced so the work actually pays, and organized enough to invoice before you leave the driveway. Plenty of great plumbers go broke in year one, and it is almost never because they could not do the work. It is because the business was an afterthought.
This is a practical, owner-to-owner walk through the 10 steps that get a new plumbing shop legal, funded, and profitable in its first twelve months. One note up front, and it matters: licensing, certification, insurance, and bonding requirements vary a great deal by state and often by city or county. Treat everything here as the shape of the decision, not the letter of the law, and verify the specifics with your state licensing board and a local insurance agent before you act.
Doing the work and being legally responsible for it are two different licenses in most states. A journeyman can run pipe; a master plumber (or a plumbing contractor license held by a master) is usually what lets you pull permits, sign off on inspections, and operate a company under your own name. The exact titles and thresholds differ everywhere, so confirm with your state board what your jurisdiction actually requires before you hang a shingle.
The common path is journeyman hours logged, then the master exam, then a separate contractor or business license issued at the state or municipal level. Some states let you operate as a contractor by employing a qualifying master; others require the owner to hold the license personally. Know which one applies to you, because it changes whether you can start solo tomorrow or need a qualifying partner first. Many jurisdictions also require a separate backflow prevention certification to test and install backflow assemblies, which is a steady, well-paid line of work worth adding early.
Most solo and small plumbing shops form an LLC. It separates your personal assets from the business, which matters in a trade where a single missed connection can flood a finished basement, and it is inexpensive and simple to maintain. Some owners choose an S-corp election later for tax reasons once profit is steady, but that is a conversation for your accountant once you have real numbers, not a day-one decision.
Once the entity exists, get an EIN from the IRS. It is free, it takes minutes online, and you need it to open a business bank account, hire, and file. Do not run the business through your personal Social Security number and personal checking account. That single shortcut is what turns bookkeeping into a nightmare and audits into a bad week.
Two policies are effectively non-negotiable for a plumbing contractor:
You may also want commercial auto for the van and a tools or equipment policy for the drain machine, camera, and press tools. Coverage minimums and what is legally required vary by state and by the customers you serve, so get quotes from an agent who writes policies for trades in your area rather than guessing at a number. The premium feels like a lot when you are starting out. One flooded house feels like a lot more.
Many jurisdictions require plumbing contractors to carry a surety bond, often as a condition of the contractor license itself. A bond is not insurance for you; it is a financial guarantee to the public and the licensing authority that you will operate to code and honor your obligations. Bond amounts and whether one is required at all vary widely by state and municipality, so this is another item to confirm with your licensing board rather than assume. If it is required, line it up early, because you frequently cannot activate the license without it.
With the EIN in hand, open a dedicated business checking account and run every dollar of revenue and expense through it. Get a business debit or credit card for materials and fuel. This one habit does more for your sanity than any app: when business money and personal money never touch, your books practically write themselves, your taxes get simpler, and you always know whether you are actually making money.
Set up bookkeeping from the first invoice, not the first tax season. Whether you use accounting software or hand a shoebox to a bookkeeper each month, the point is that every job, every fixture and parts receipt, and every payment lands somewhere you can see it. Knowing your numbers (step 10) is impossible if the numbers were never recorded.
"Plumber" is not a business. It is a trade. The business is defined by which plumbing work you chase, and the broad lanes pull in different directions:
Pick the lane you start in on purpose, and lean into what makes plumbing different: emergencies. A burst pipe or a house with no water at 9pm is not a job the customer shops around on, and after-hours work commands a premium. If you can answer the phone and show up when the water is on the floor, you own the most profitable, least price-sensitive work in the trade. Residential service is the most common starting point precisely because it turns into cash fastest, which is exactly what a first-year business needs.
Underpricing is the quiet killer. A new owner sees the wage they used to earn as a journeyman, adds a little, and calls it a rate, forgetting that the rate now has to cover the van, the insurance, the license renewals, the fuel, the unbillable driving and quoting time, and the profit that is the whole point of ownership. Your billing rate is not your old wage. It is a burdened number that carries the entire business.
The move that separates professional shops from truck-and-a-phone operators is a price book: a maintained list of your common tasks (clear a main line, replace a water heater, swap a disposal, install a faucet) each with a set flat-rate price built from your own costs. Flat-rate pricing is friendlier to residential customers than an hourly meter, it stops your fast work from being penalized, and it makes every quote consistent whether you or a future tech delivers it. We break down the honest tradeoffs in flat-rate vs hourly pricing for plumbers, and the pricing pillar covers how a price book flows straight through to your quotes and invoices.
Here is where new owners either overspend or underthink. The overspenders sign a $300-a-month contract for heavy dispatch software they will not fill for two years. The underthinkers keep quoting on the back of a business card and invoicing from a notepad, then wonder why they get paid late. Neither wins.
On day one, a solo plumbing business needs exactly three things to run, and none of them is a dashboard to learn:
This is exactly the gap FieldForge was built to fill for a brand-new owner. It is the low-friction starter tool: no dashboard to configure, no onboarding week. You hold a button and say the job, for example "replaced a forty-gallon gas water heater and the shutoff valve, two and a half hours labor", and it builds a clean, itemized invoice from your price book, then texts the customer a link to pay. From your first job you look like an established shop, and you get paid like one. When you are not near a customer, our free invoice generator and plumbing invoice guide run right in your browser with no signup, so you can send a professional invoice before you have decided on anything else.
A license and a van do not ring the phone. Your first jobs come from a short, boring list that works:
One plumbing-specific warning: the emergency calls that pay the most come in when your hands are already full under a sink. Every call you miss at 8pm on a Saturday is a burst-pipe job going to the next company on the search results, at exactly the moment the customer would have paid a premium and never haggled. Before you spend a dollar on ads, make sure you have a plan to answer the phone when you are busiest. We put real numbers on it in what a missed call actually costs a service business.
The owners who make it are the ones who can answer three questions off the top of their head: what did I bill this month, what did it cost me to earn it, and how much of that is actually mine. If you do not know your job costs, you cannot know your margin, and if you cannot see your margin, you are flying blind no matter how busy the calendar looks. Busy and profitable are not the same thing, and plenty of first-year plumbers confuse the two right up until the cash runs out.
You do not need an MBA for this. You need every job recorded, parts and labor tracked against the price you charged, and a look at the totals at least monthly. When your quoting, invoicing, and payment records all live in one place instead of four spreadsheets and a shoebox, knowing your numbers stops being a chore you dread and becomes a glance you take.
None of this requires you to become a different person. You are still the plumber who can find a slab leak by feel. You are just the one who also gets paid on time, looks like a real company from the first job, and knows exactly where the money went. That is the whole difference between a year-one shop that folds and one that is still standing, and hiring, a year later.