Short answer: most solo plumbers can get up and running for somewhere between $8,000 and $25,000, and if you already own a usable van, you can do it for under $10,000.

But that range is useless without the breakdown, because where you land depends on a handful of big choices, mainly whether you need to buy a van. Let me walk you through every line item with real numbers, so you can build your own total instead of guessing.

We’ll cover three scenarios for each item: Lean (you’ve got some stuff already, you’re scrappy), Typical (the realistic middle), and Loaded (buying everything new).

The Big Picture First

Now the detail on each.

Licensing and Legal: $300 – $1,500

This is your cost to be legal.

• License and exam fees — Varies a lot by state, but exam plus license fees typically run $200-$700. Some states tack on a contractor license on top of your master’s license.
• LLC formation — State filing fees run roughly $50-$500 depending on the state. You can do it yourself on your state’s website, or pay a service a bit more to handle it.
• Business license / permits — Your city or county may require a local business license, usually $50-$150/year.

You can’t skip this part. Operating unlicensed is how you lose everything in one lawsuit.

Insurance and Bonding: $1,000 – $4,000 (first year)

• General liability insurance — The big one. $1M coverage typically runs $1,000-$3,000/year for a solo plumber. You may be able to pay monthly.
• Surety bond — Many states require one to get licensed ($10K-$25K bond). You don’t pay the full bond amount, just a premium, usually $100-$500/year depending on your credit.
• Commercial auto — Your personal policy won’t cover work use. Budget $1,500-$3,000/year, often paid monthly.
• Workers’ comp — Only required once you hire someone, so $0 if you’re starting solo.

The Van: $0 – $15,000+

This is the single biggest swing in your startup cost.

• Already own a usable truck or van? Your cost here is $0 and your total startup number drops dramatically.
• Buying used — A solid used cargo van in good shape runs $6,000-$12,000. This is what most smart new owners do. Don’t take on a big payment before the revenue exists.
• Buying new — $35,000+ and a monthly payment that eats your margin from day one. Hard to justify when you’re starting out.

Buy the least van that does the job well. You can upgrade once you’re profitable.

Van Setup: $500 – $4,500

A bare van isn’t ready to work.

• Shelving and bins — $500-$3,000. Keeps you organized so you’re not losing billable time digging for parts.
• Wrap or lettering — $500-$3,500. Even simple door magnets or vinyl lettering ($150-$500) turn your van into free advertising. A full wrap costs more but works harder.

Tools and Starting Inventory: $1,500 – $7,000

You’ve got hand tools. This is about filling the gaps and stocking parts.

• Specialty tools — drain machines, pipe locators, camera, press tools. You can rent the expensive stuff at first and buy as jobs justify it.
• Starting inventory — common fittings, valves, supply lines, wax rings, the stuff you reach for daily. Stocking the van means finishing jobs in one trip instead of running to the supply house (unpaid time).

Start lean here and restock from job revenue. Don’t blow your budget buying tools “just in case.”

Tech and Software: $300 – $1,500/year

Easy to under-invest here, but this is what makes you look professional and get paid fast.

• Payment processing — Square or similar, low setup cost, takes a percentage per transaction.
• Invoicing / estimating software — Free to ~$100/month. Many field service apps bundle scheduling, invoicing, and dispatch.
• Business phone number — Keep your personal cell private. A separate business line is cheap and worth it.

Marketing: $200 – $3,000

• Google Business Profile — Free. This is your #1 lead source and costs nothing but time. Do it first.
• Website — A simple one-pager can be DIY-cheap ($100-$300) or professionally built ($1,000-$3,000). You need one, but it doesn’t need to be fancy.
• Initial reviews push — Free. Just ask every customer.

Notice your most important marketing (Google Business Profile and reviews) costs nothing. Don’t let anyone tell you you need a huge ad budget to start.

The Cash Cushion: $3,000 – $12,000 (the one people forget)

This is the costliest mistake new owners make: spending every dollar on setup and having nothing left to live on while the business ramps up.

Your first couple months will be slow. You need enough cash to cover your personal bills AND the business’s fixed costs while the phone starts ringing. Budget at least 2-3 months of runway. This single line item is the difference between businesses that survive year one and businesses that fold.

So What’s the Real Number?

• If you own a van and start lean: ~$7,000-$10,000
• Typical solo startup buying a used van: ~$20,000-$25,000
• Fully loaded with a new van: $40,000+

Most plumbers should aim for the lean-to-typical range. You do NOT need to spend big to start well. You need to spend smart, in the right order, with a cash cushion.

Know Your Number Before You Spend a Dollar

Guessing at startup costs is how budgets blow up. The Plumbing Starter Kit includes a startup budget calculator with every line item above already built in. You plug in your situation (own a van or not, your state’s fees) and it spits out your real total and your monthly break-even. Plus the business plan template, pricing calculator, license checklist, insurance comparison sheets, and the full customer-getting playbook.

One download. One price. No monthly fees. It pays for itself the first time it stops you from underpricing a single job.

Get the Plumbing Starter Kit →

Want the full launch roadmap? Start with our guide on how to start a plumbing business.