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How to Start a Plumbing Business

What it takes to legally start a plumbing business in the US — licensing, structure, EIN, taxes, insurance, and your first customers. The steps are the same everywhere; the forms and fees depend on your state, so pick yours below for the exact links.

Typical startup cost
$6,000–$25,000 (tools, van outfitting, license and bond, insurance)
Licensing
state + local — varies
Best structure
LLC for most
First customers
referrals + local search

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  1. Check the licensing for plumbing work

    Nearly every state licenses plumbers at the journeyman/master level and requires hours of documented experience plus an exam. You usually can't legally advertise plumbing work without it. This is the part that varies most by state — some require a state license or registration before you can advertise, others leave it to the city or county. Confirm both your state board and your local government before you take a job.

  2. Decide what the business needs to open

    Repair, installation, and maintenance plumbing for homes and commercial clients. The setup areas that usually matter for a plumbing business: State/master plumber license, Liability + bond, Van and tools, Flat-rate pricing, Emergency availability. Typical cost to get operational: $6,000–$25,000 (tools, van outfitting, license and bond, insurance).

  3. Pick a structure — sole proprietor or LLC

    You can start as a sole proprietor with no filing, or form an LLC (usually $50–$300 depending on your state) for liability protection. For hands-on trade work where something can go wrong on a customer's property, most owners choose the LLC.

    LLC filing fee and steps by state ↗

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  4. Get a free EIN from the IRS

    An Employer Identification Number is free and takes a few minutes online. You need it to open a business bank account and to hire.

    IRS — Apply for an EIN ↗

  5. Register for state taxes and get insurance

    Register with your state's tax agency if you'll collect sales tax, then line up general liability insurance and a surety bond — most contracts and license boards require proof of coverage.

  6. What plumbing businesses charge

    Flat-rate per job wins over hourly for residential — $150–$450 for common repairs (faucet, toilet, disposal), $1,200–$3,500 for a water heater, $300–$600 minimum for a service call. Commercial and new construction bid by the fixture or the plan. Steady year-round from failures (water heaters, slab leaks, sewer backups) with a hard spike during freeze events. Emergency availability commands premium rates; recurring commercial maintenance contracts smooth the calendar.

  7. Get your first plumbing customers

    Google Business Profile + reviews, HomeAdvisor/Angi, and referrals from realtors and property managers. Reviews, Google Business Profile, and being reachable for emergency calls drive early work. Recurring commercial accounts stabilize revenue.

    Getting customers for a plumbing business ↗

  8. The mistake most first-year plumbing owners make

    Underpricing the service call. Your truck, insurance, license, and unbilled drive time have to be covered before you've turned a wrench — most new plumbers set their call fee $75–$150 too low and work the first year at a loss.

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Frequently asked

How do I start a plumbing business?

Check the licenses for plumbing work in your state, pick a structure (sole proprietor or LLC), get a free EIN from the IRS, register for state taxes, open a business bank account, get general liability insurance and a bond, then set up a Google Business Profile and line up your first jobs. The order and the exact forms depend on your state.

Do I need a license to start a plumbing business?

Nearly every state licenses plumbers at the journeyman/master level and requires hours of documented experience plus an exam. You usually can't legally advertise plumbing work without it.

How much does it cost to start a plumbing business?

Plan for $6,000–$25,000 (tools, van outfitting, license and bond, insurance) to get operational, plus $50–$300 if you form an LLC (varies by state). An EIN is free, and general liability insurance runs a few hundred dollars a year for most solo operators.

What should I charge for plumbing?

Flat-rate per job wins over hourly for residential — $150–$450 for common repairs (faucet, toilet, disposal), $1,200–$3,500 for a water heater, $300–$600 minimum for a service call. Commercial and new construction bid by the fixture or the plan.

How much do plumbing businesses make?

It depends on your rates, your utilization, and your area. See the income and pricing breakdown for a plumbing business for typical owner take-home and what to charge.

How much does a plumbing business license cost?

It depends on your state and exactly which license applies — a state professional license commonly runs $50–$300 plus any exam or renewal fee, and a local city/county business license is often another $25–$100. That's separate from the $50–$300 LLC filing fee if you form one. Use the License Finder tool with your state for the exact fee for plumbing work.

How much does plumbing business insurance cost?

General liability insurance for a solo plumbing operator typically runs $300–$800 a year, more with commercial auto coverage or a higher liability limit, plus a surety bond that usually costs $100–$500/yr. Most contracts, landlords, and license boards require proof of coverage before you can start.

Where do the first plumbing customers come from?

Google Business Profile + reviews, HomeAdvisor/Angi, and referrals from realtors and property managers.

Official sources

Fees and timelines are commonly-cited figures last reviewed September 2026 and can change — always confirm on the official site. This is educational information, not legal or tax advice.

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AI-generated guidance is for educational purposes only and is not legal, tax, or investment advice. Disclosures · Trust center