Starting a plumbing business trades a paycheck for a profit-and-loss statement.
8% of the country's plumbers, pipefitters and steamfitters were already self-employed in 2025, and the federal wage table doesn't count a single one of them — so the honest answer runs through your licence, your startup costs, your pricing, and a first-three-years income figure our research could not verify.
Here is each piece, with the numbers that exist and the gaps we couldn't fill.
Is going out on your own right for you?
Start with how the trade actually organizes itself.
In 2025, 65% of plumber, pipefitter and steamfitter jobs were with plumbing, heating and air-conditioning contractors and 8% were self-employed, out of 510,600 total jobs including the self-employed (BLS Occupational Outlook Handbook).
Most plumbers work for someone else's business — but the 8% working for themselves are exactly the group this page is about.
The demand side isn't the risk.
BLS projects employment in the trade to grow 6.8% from 2025 to 2035, faster than the 3.5% all-occupation average, with an average of 42,000 openings a year from growth and replacement.
The question is whether you want the other job that comes with the truck: pricing, scheduling, collecting, and carrying the costs when a job goes sideways.
The hours change too.
Most plumbers, pipefitters and steamfitters work full time including nights and weekends, and plumbers are often on call for emergencies — as an owner, the emergency line forwards to you by default.
If what you want is the trade without a boss and you can live with the paperwork, the rest of this page is the math to run.
The license you need to contract
As a wage employee you work under your employer's licence umbrella.
As a business, you become the entity that pulls the permit — and states regulate that entity separately, with the title for the person who qualifies the business changing by state: Florida calls the qualifier a "qualifying agent," California uses RMO/RME, Texas and Colorado a Responsible Master Plumber, Montana and Massachusetts a "master plumber of record" (our master plumber license guide covers earning that licence).
In a long list of states — Georgia, Maine, Kentucky, Delaware, Montana, Wisconsin, Texas, Louisiana, New Jersey, North Dakota, Connecticut and Rhode Island, plus New York City and Nebraska's city master licences — the individual master-level licence is what lets a business contract, with no separate state plumbing-contractor licence at all.
Where a separate contractor licence exists, the dollar triggers for needing one range widely: $1,000 in Arizona, California and Virginia (Class C), $10,000 in South Carolina (commercial), $25,000 in Tennessee and $50,000 in Mississippi and Arkansas (commercial) — and North Carolina sets no dollar threshold at all.
Which states license plumbing contractors, and what the company itself must carry, is the employer cluster's question — our plumbing contractor license guide walks it state by state.
One trap to clear before you price a single small job: the handyman exemptions you've heard about don't cover plumbing everywhere.
Nevada's under-$1,000 exemption excludes plumbing, heating and AC work; Arizona's and California's under-$1,000 rules fail once a permit is needed; North Carolina and Oklahoma have no dollar exemption for these trades at all.
The individual licence ladder behind all of this is our plumbing license guide.
Licensing is set by your board — or your city
Startup costs: what you actually have to price
Here we have to be straight with you: there is no verified national figure for what it costs to start a plumbing business, and we won't invent one.
What exists is a stack of categories, each priced locally:
- Licence and exam fees — set by your state board (or city). Get the current fee schedule from the board itself.
- A work vehicle, stocked — one you may be able to start smaller than an employer's rig.
- Tools beyond what you already own — the plumber tools list shows what the trade carries stage by stage, and what employers typically supply that now becomes yours to buy.
- Insurance and bonding — where a bond is required, the state-set amounts are real money: examples run from $2,000 (Idaho plumbing contractor) and $3,000 (New Jersey) to $6,000 for a Washington plumbing contractor and $25,000 in California and Minnesota — and California adds a separate $25,000 qualifying individual's bond when the qualifier is not the proprietor or a general partner (for example, an RME or a non-owner RMO). Maryland runs on insurance instead ($300,000 general liability plus $100,000 property damage for HVACR contractors).
- Bookkeeping and invoicing — software or an accountant, priced however you set it up.
Price every line with a real quote — the board, an insurer, a supplier — and the total you get is your startup cost.
Nobody else's number, including ours, substitutes for that stack.
Pricing and cash flow
Your price has to clear a floor you can compute from facts you already have.
As an employee, the trade's median wage is $30.67 an hour, or $63,800 a year, with the middle half between $50,190 and $85,110 — and annual figures assume a full-time, year-round schedule of 2,080 hours.
Your business needs to clear your own target wage plus the entire cost stack from the last section — licence renewals, the truck, insurance, fuel — before ownership pays you anything.
Note also that employee wage figures exclude overtime, so a working plumber's real annual earnings can run above the published table; the bar you're setting for yourself is the higher one.
Cash flow is the same math on a calendar.
Money leaves weekly — fuel, materials, insurance, the truck payment — while job income arrives on whatever schedule you and your customers agree to.
Model the slow month before it happens: if one delayed payment would starve the truck, the pricing needs more cushion or the bookings need more depth.
How you structure the bill — flat rate against time-and-materials — is a business decision, and the markup that holds up is the one your own cost stack supports: price until the math clears the floor you set above.
First-three-years income: what the data does and doesn't say
This is the section where a number would be handy, so here is the honest version: our research found no verified figure for what a new plumbing-business owner earns in years one through three.
The OEWS wage table covers employees only — self-employed owners and partners in unincorporated firms are excluded — and the 8% self-employed share is a count of jobs, not of income.
The familiar survival-rate statistics quoted around small business don't come from a source our research could verify either, so we won't repeat them.
What the data does give you is the baseline you'd be stepping away from.
The trade's median is $63,800 a year; the 90th-percentile wage-and-salary plumber earns $108,420.
Our plumber salary page shows the full BLS tables by state.
Your first three years of owner income will be your price times booked work, minus the cost stack — a distribution our research could not verify, which is exactly why you model it with local numbers before you resign.
The upside case is structural: 8% of the trade already runs its own book, and the earnings of successful owners sit entirely outside the federal wage table — in whichever direction your pricing, your costs and your calendar take them.
What plumbing business owners make, as a number, is a question our research could not verify — treat any specific figure you find as marketing until you see its source.
When to jump
The move is a sequence, not a leap.
Run the gates in order and the decision makes itself:
- Confirm the licence path with your state board — whether your individual licence qualifies the business, or the company needs its own contractor registration
- Price the startup stack with real quotes: exam and licence fees, the truck, tools, insurance and any bond your state sets
- Set your pricing floor from your costs plus the wage you need to replace — the trade's $63,800 median is the honest starting line
- Line up work before you resign — side jobs booked into evenings and weekends are one way to test the model first
- Model the slow-payment month and keep a cash cushion that survives it
- If the plan is to grow past yourself, learn what hiring involves before you need to do it
The solo model has a ceiling: the calendar fills, and one person can only cover so many calls.
When you're ready to grow past it, our guide to hiring a plumber covers the sourcing, pay and screening decisions that come with a first hire — and the plumbing business licence guide covers what the company itself may need to hold before you do.
Career information, not legal or financial advice. Licence and contractor-registration rules are set by your state licensing board — or your city or county where licensing is local — and bond and insurance minimums by the states that require them. Confirm the rules that matter with whoever sets them before you sign anything.