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

Tennessee’s plumbing licensing depends on job size and location. Plumbing jobs of $25,000 or more need a state contractor license with the CMC-A (plumbing) classification from the Board for Licensing Contractors. Smaller jobs fall under a Limited Licensed Plumber license in some areas, or local rules elsewhere.

This guide is for plumbers moving into ownership and for owners setting up a plumbing company in Tennessee. 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.

Match your license to job size and location

• Jobs of $25,000 or more: you need a contractor license before bidding or pricing the work. This includes plumbing subcontractors whose share of the project is $25,000 or more. The plumbing classification is CMC-A, Plumbing and Gas Piping (classification outline). The board must pre-approve you before you take the CMC-A exam ($50 pre-approval request). The qualifying agent then passes the open-book Business and Law exam and the trade exam. You also submit a CPA-reviewed financial statement (or, since July 1, 2026, a surety bond option), a reference letter and proof of insurance. Your monetary limit depends on your finances.
• Jobs under $25,000: a Limited Licensed Plumber (LLP) license is required only where the state Division of Fire Prevention handles permits or inspections. General maintenance under $500 is exempt. Elsewhere, cities and counties set their own plumbing license rules, so check with local code enforcement first.

Fees listed by the board: the initial contractor application is $250, the CMC-A pre-approval request is $50, and the LLP application is $75. Exam fees are paid to the testing company. You also need a business tax license for each city or county where you operate.

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 Tennessee 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 Tennessee 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 Tennessee plumbing insurance guide.

For a state contractor license, the board requires general liability coverage based on your monetary limit, plus workers’ compensation unless you show an exemption. The board’s insurance information sheet lists the details.

Tennessee says construction businesses generally must carry workers’ compensation for everyone, including the owners; other businesses need it at five or more employees (TN Department of Labor). Confirm how this applies to you before you hire.

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

Depending on where the job is, permits come from the city or county codes department, or from the state Division of Fire Prevention. Larger cities often run their own plumbing permit and license programs.

• 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 Tennessee 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 Tennessee 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 Tennessee 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 Tennessee tax agency or your bookkeeper how it applies to your repair, installation and new-construction work. Our Tennessee 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.

Tennessee plumbing startup questions

Do I need a state license for a $5,000 water heater job?

Not a state contractor license, since it’s under $25,000. Depending on location, you may need an LLP license or a local plumbing license. Check with the local code office.

What is a monetary limit?

It’s the most you can contract for on a single project with your state license. It’s based on your working capital and net worth, and you can raise it with better financials.

Can I use an out-of-state license?

No, but Tennessee offers trade exam waivers with some states, including Ohio and South Carolina for plumbing. You still take the Business and Law exam.

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