How to Start a Plumbing Business in Indiana: Licenses, Costs & Insurance

Indiana licenses plumbers statewide through the Indiana Plumbing Commission, part of the Professional Licensing Agency (PLA). To run a plumbing business, you need a plumbing contractor license. You also need to check city and county requirements, which can include their own registration, bonds and insurance.

This guide is for plumbers moving into ownership and for owners setting up a plumbing company in Indiana. Forming a business, or holding a worker’s license, doesn’t by itself give the company the right to contract for plumbing work.

Reviewed October 1, 2026. Some links are affiliate links; we may earn a commission. Paid providers are optional and don’t issue plumbing licenses.

Get the Indiana plumbing contractor license

The Indiana Plumbing Commission licenses plumbing apprentices, journeyman plumbers and plumbing contractors:

• Apprentice: at least 17, enrolled in a commission-approved apprenticeship program with a supervising journeyman or contractor.
• Journeyman plumber: at least 18, with a certificate of completion from an approved apprenticeship school, or documented plumbing trade experience (such as an out-of-state license), then the exam.
• Plumbing contractor: the business-level license. You qualify through an approved apprenticeship or the plumbing trade experience route, then pass the contractor exam.

The commission must approve your application before you can register for an exam. The exact experience the commission accepts for each route is set by state law and commission rules, so check the current application before you apply.

Application fees listed by PLA: $10 for apprentice, $30 for journeyman plumber and $50 for plumbing contractor, all nonrefundable. Exam fees are paid to the testing vendor. Local registration fees vary.

Write down the services your license will cover and who is responsible for supervising the work. Ask separately about specialty work such as medical gas, backflow testing, gas piping, septic systems or well work. Don’t assume every job involving pipe falls under the same license. Plan what happens if the person whose license the company relies on leaves.

Set up the business in the same name you will license

Choose the ownership structure before you finish license applications, insurance and banking. An LLC is an option, not a substitute for plumbing licensing. Our Indiana LLC guide explains filing choices and costs so you can compare filing yourself with optional help.

Use the same legal name, and any registered trade name, on license records, estimates, insurance certificates and payment accounts. Decide who can sign contracts, approve supplier purchases and use the bank account. If there are several owners, put licensing and money responsibilities in your ownership agreement.

Use the Indiana business requirements checklist for general setup, such as state tax accounts and registrations. Ask your city or county about local business licenses, zoning and storage rules for your office or shop, even if it’s in your home.

Open a separate business bank account and keep job-by-job records before you take deposits. Get an EIN when you need one through the IRS’s free EIN application. Track materials, labor, permit fees and customer payments separately, so unpaid invoices don’t look like cash in the bank.

Arrange plumbing liability coverage and workers’ compensation

For coverage choices, licensing limits and quote preparation, see our Indiana plumbing insurance guide.

We didn’t find a statewide liability insurance minimum for Indiana plumbing contractor licenses. Many local governments, such as Indianapolis, set their own insurance or bond requirements for contractor registration, so ask each one.

Indiana employers are generally required to carry workers’ compensation (Indiana Worker’s Compensation Board). Independent contractors who want to be exempt must file for a certificate of exemption.

Tell the insurer about drain cleaning, digging, gas piping, commercial work, subcontractors and the tools you keep in your van. Ask about completed work, water-damage claims, exclusions, commercial auto and equipment theft. Make sure coverage is active before you book the work; a quote request isn’t a policy.

Check permits and site access before promising a completion date

Permits and inspections come from the city or county building department. Some places require local contractor registration and proof of your state license before they issue a plumbing permit.

• Water heaters and fixture swaps: check whether the actual job needs a permit and inspection instead of assuming replacements are exempt.
• Repiping and remodels: plan inspections before walls are closed, and agree who repairs drywall and finishes.
• Sewer and underground work: call for utility locates before digging, and find out whether street or utility approvals are involved.
• Apartments, condos and managed buildings: agree on access, water shutoff notices, work hours and any paperwork the property manager needs.

Write down existing damage and access limits before you start. Don’t promise a permit waiver or an insurance payout you haven’t confirmed.

Budget for a Indiana service operation, not just the license

Build the budget around the services you’ll open with: repairs and replacements, drain work, remodels or commercial subcontracting. Price the actual equipment and insurance before committing to a van or taking on debt. You can often rent specialty cameras and drain machines at first if the jobs justify it.

Example launch cash plan—not surveyed Indiana prices

Category	Example allowance
Setup and first insurance payments	$3,000 placeholder for applications, exams, company setup and first insurance payments; replace it with your actual fees and quotes.
Tools and opening parts	$5,000 to fill gaps in an existing toolkit and stock common repair parts.
Vehicle preparation	$2,000 for a suitable vehicle you already own; doesn’t include buying a van.
Working cash	$8,000 assumed reserve for supplier bills, fuel and overhead until customer payments arrive steadily.
Example total	$18,000, not counting a vehicle purchase, employee payroll, major specialty equipment or household living costs.

Plan weekly cash needs, including a late invoice or a callback you can’t bill. New businesses may not meet a lender’s time-in-business or revenue rules. Compare total repayment, fees, payment schedule and personal guarantees before you borrow; approval isn’t guaranteed.

Price the job, document the scope and collect payment

Set a clear service-call or diagnostic fee. A short repair can still involve driving, picking up parts, paperwork and a return trip, so the wage you want isn’t the same as your billing rate. The national plumbing pricing example shows how the same monthly cost target leads to different rates at different numbers of billable hours.

Before work starts, write down the approved repair, included materials, who pulls the permit, what restoration isn’t included and how payment works. Get approval for extra work you find after opening a wall or scoping a drain. Have Indiana contract and notice rules reviewed before you adopt standard paperwork.

Sort out sales tax before you copy an invoice template. States treat contractors differently: in some, you pay tax on materials you buy; in others, you charge tax on some jobs. Ask the Indiana tax agency or your bookkeeper how it applies to your repair, installation and new-construction work. Our Indiana business setup guide covers state tax registration.

Check your payment system’s fees, payout timing and dispute process. Keep the customer’s approval, before-and-after photos and completion notes with the invoice. For commercial jobs, plan for progress billing and retainage separately from pay-when-done home service calls.

Win local work before adding a second truck

Pick a service area you can cover profitably, and make your services and hours clear. Build referral relationships with property managers, remodelers and other trades. Ask happy customers for honest reviews, and track which inquiries turn into paid jobs, not just which ads make the phone ring.

For managed properties, prepare a short packet with your current license, insurance certificate, contacts and invoicing details. Agree who can approve an emergency repair and what happens if the repair costs more than first approved.

Hire for a specific bottleneck. Check the worker’s license or registration, required supervision, payroll setup and workers’ comp before the first shift. Count training, travel, unbilled hours and extra equipment in the cost of growing.

Our skilled-trade and AI construction research is useful background, but announced projects don’t prove demand for your particular service. Build your first operation around customers you can reach and work you’re licensed and equipped to do.

Indiana plumbing startup questions

Can a journeyman plumber run a business in Indiana?

To contract for plumbing work, you generally need the plumbing contractor license. A journeyman can work for a licensed contractor.

Do I need local registration too?

Often, yes. Many Indiana cities and counties register contractors and may require a bond or insurance. Check before you pull permits.

Does Indiana accept out-of-state licenses?

The journeyman trade route lets you submit an out-of-state license or experience for review. Ask the commission how your experience will be counted.

Continue with the national plumbing business guide, the Indiana business setup hub or the Indiana LLC filing guide.