Home/New Hampshire/Plumbing
2026 Guide

Start a Plumbing Business
in New Hampshire

$100 to file · 5–7 business days to process · $75–$200/job average · No state income tax

The American LLC Research Team

Formation, Compliance and Tax Research

Last reviewed September 2026

Filing Fee

$100

Processing

5–7 business days

Annual Fee

$100

Revenue Potential

$50,000–$150,000/yr

Avg Job Rate

$75–$200/job

Top Tax Rate

None ✓

New Hampshire filing fee and annual report fee verified September 2026 against the New Hampshire Secretary of State.

Market Overview

Is New Hampshire a Good State for a Plumbing Business?

New Hampshire has no general income tax and no sales tax — the only state in New England to offer both benefits. The $100 filing fee and $100 annual report are standard. Manchester and Nashua benefit from proximity to Boston while maintaining lower operating costs.

For Plumbing specifically, New Hampshire offers a competitive market with defined seasonal demand. With Manchester, Nashua, and Concord as major population centers, there is consistent demand across New England.

Annual Revenue

$50,000–$150,000

Per Job

$75–$200

Jobs/Month

15–30 jobs

Estimates of typical pricing and volume, not guarantees. Results depend on local pricing, competition, and marketing.

✓

New Hampshire has no state income tax

As a Plumbing LLC owner in New Hampshire, you pay federal self-employment tax (15.3%) but zero state income tax. Compared to California (13.3%) or New York (10.9%) operators, you keep significantly more per dollar earned.

!

Your LLC name must be available

Your Plumbing LLC name must be unique in New Hampshire's registry. A duplicate name gets your filing rejected. Northwest can form your LLC for $39 plus the $100 state fee, with your first year of registered agent service included.

Form Your LLC with Northwest→

Entity Decision

Do You Need an LLC to Run It?

You are not legally required to form an LLC. You can operate as a sole proprietor from day one. Most Plumbing owners form one for one reason: A failed pipe connection or improper water heater installation can cause water damage claims of $10,000–$100,000. These claims happen even to experienced plumbers — LLC protection is essential before taking any paid work.

As a sole proprietor, personal assets — savings, car, home — are directly exposed to any lawsuit or debt. An LLC creates a legal wall between you and your business.

Form an LLC now if you

  • ✓ Are taking paid clients from day one
  • ✓ Are buying $1,000+ in equipment
  • ✓ Want a business bank account
  • ✓ Are operating in Manchester where contracts require proof of entity
  • ✓ Will carry commercial insurance

You might wait if you are

  • – Still testing with no paying clients
  • – Earning under $1,000/month
  • – Operating as a hobby to test market fit

Formation Guide

How to Form an LLC in New Hampshire — Step by Step

$100 filing fee · 5–7 business days to process · Filed with the Secretary of State

1

Choose a Name for Your LLC

Your LLC name must be unique in New Hampshire's registry and include "LLC" or "Limited Liability Company." It does not need to match your trading name — many owners form "Smith Holdings LLC" and operate as "Plumbing of Manchester."

Optional name reservation: $15 — holds your name for 120 days

Form your LLC with Northwest→
2

Appoint a Registered Agent

New Hampshire requires every LLC to designate a registered agent with a physical New Hampshire address. Must have physical NH address or use commercial registered agent

i
Recommended: Northwest Registered Agent charges $39 to form your LLC (plus the state fee) and includes the first year of registered agent service. After year 1, registered agent service is billed annually.
3

File Your Articles of Organization

File online with the Secretary of State or through a formation service.

Filing fee$100
Processing time5–7 business days
You will needLLC name, registered agent, member names, business address

Recommended Filing Service

Northwest Registered Agent

Northwest files the state paperwork for you and includes the first year of registered agent service, for $39 + $100 state fee.

Form LLC Now →
4

Get Your EIN (Federal Tax ID)

Free and takes ~10 minutes at irs.gov. Needed to open a business bank account, hire employees, and file taxes. If approved, the IRS issues your EIN immediately online. The online application is open Mon–Fri 6 a.m.–1 a.m. ET, Sat 6 a.m.–9 p.m. ET and Sun 6 p.m.–midnight ET.

5

Open a Business Bank Account

The step most new plumbing owners skip. Mixing personal and business money makes it easier for a court to disregard your LLC's liability protection. Mixing personal and business funds is one of the most common reasons courts disregard an LLC's liability protection. Bring: EIN letter, Articles of Organization, government-issued ID.

6

Get Business Insurance

Minimum: $2M general liability + $1M professional liability · Est. annual cost in New Hampshire: $1,200–$3,000/year

→
A pinhole leak in a concealed pipe connection can cause months of undetected water damage costing tens of thousands before the source is discovered
7

Check New Hampshire Plumbing Contractor Licensing

Most states license plumbing work at the state or local level. Check what New Hampshire requires before taking paid work. Forming your LLC does not grant operating rights; licensing is a separate step.

!

Do not take paid jobs before your license is issued

Unlicensed contracting can lead to fines and, in some states, criminal penalties. Insurers may also refuse claims for unlicensed work. Check New Hampshire's licensing board before you take paid jobs.

Need to save time?

Hire Northwest to handle filing, registered agent and compliance. $39 + $100 state fee.

Start for $39 →

Financial Overview

What It Costs to Get Started in New Hampshire

One-Time Setup Costs

LLC filing fee$100
Formation service (optional)$0–$39
Registered agent (year 1)$0 free with Northwest
EIN applicationFree at irs.gov
Business bank accountFree (most banks)
Business insurance$1,200–$3,000/year
Equipment & startup costs$5,000–$20,000

What the equipment budget covers: Plumbing tools (pipe wrenches, pipe cutters, soldering equipment), drain snake, water jetter, pipe inspection camera, service van, PEX and copper fittings inventory.

Estimated Year 1 Total$6,300–$23,100

How we calculate this: the $100 state filing fee from the official fee schedule, plus our estimated ranges for equipment and startup costs and first-year insurance. It leaves out optional formation-service fees, local licenses and taxes.

Annual Recurring Costs

Registered agent renewal (if you use a service)Varies by provider; billed yearly after any included first year
Business insurance renewal$1,200–$3,000/year
New Hampshire annual report fee$100 due Apr 1
84

jobs to cover first-year costs (estimate)

At $75–$200/job · 15–30 jobs · roughly 2–6 months of gross revenue to cover the low-end first-year cost, before other expenses and taxes.

* Fees payable to the Secretary of State and subject to change. Formation service fees are separate from and in addition to state filing fees.

Compliance

New Hampshire-Specific Rules You Need to Know

Publication Requirement

✓

New Hampshire does not require LLC publication

Unlike New York, Arizona, and Nebraska, there is no newspaper notice requirement. Your LLC is active as soon as the state processes your Articles of Organization.

Tax Treatment

✓

New Hampshire has no state income tax

As an LLC owner, you pay federal self-employment tax (15.3%) but no New Hampshire state income tax — a significant advantage over California and New York operators.

Annual Report & Compliance

Standard flat fees Fee: $100, due Apr 1.

Avoid These

Common Mistakes Plumbing Business Owners Make in New Hampshire

  1. 1

    Starting work before your contractor license is issued

    Unlicensed plumbing work can lead to fines and, in some states, criminal penalties, and insurers may refuse related claims. Form your LLC first, then complete licensing.

  2. 2

    Not carrying professional liability

    General liability alone does not cover advice or design errors. A plumber who recommends a pipe configuration that later fails needs professional liability coverage.

  3. 3

    Ignoring service call fees

    A $75–$150 service call fee covers travel and diagnostic time even when a job is declined. Skipping this loses money on every non-converting call.

  4. 4

    Using your home address as your registered agent address

    Your address appears in New Hampshire's public LLC registry. A registered agent service keeps your home address off that registry.

  5. 5

    Skipping the operating agreement

    Some states require LLCs to adopt one, and without one your LLC follows the state's default rules. A basic agreement costs nothing to write.

  6. 6

    Not separating business and personal finances

    Mixing personal and business money makes it easier for a court to disregard your LLC's liability protection. Open a business bank account before your first invoice.

Quick Answers

Frequently Asked Questions

How much does it cost to start a Plumbing business in New Hampshire?
The minimum is $100 (the LLC filing fee), plus equipment, which we estimate at $5,000–$20,000. We estimate the total first-year cost at $6,300–$23,100.
Do I need a license to start a Plumbing business in New Hampshire?
Plumbing license required in nearly every state (state-issued in most, local in some). Requirements vary significantly by state — 4+ years of journeyman experience and a licensing exam is typical. Check Manchester and Nashua requirements through New Hampshire Business One Stop Resource Center.
How long does it take to form an LLC in New Hampshire?
5–7 business days for standard filing. Expedited processing is not available in New Hampshire.
Can I run a Plumbing business from home in New Hampshire?
No — a professional plumbing business requires a fully equipped service vehicle and parts inventory.
Do I need a contractor license to start a Plumbing business in New Hampshire?
Most states license plumbing work at the state or local level. Check New Hampshire's licensing requirements before taking paid work. Forming an LLC and getting licensed are separate steps.
What is the difference between an LLC and a sole proprietorship for a Plumbing business?
A sole proprietorship gives you no liability protection. An LLC creates legal separation between personal and business finances. For a Plumbing business, where a failed pipe connection or improper water heater installation can cause water damage claims of $10,000–$100,000. These claims happen even to experienced plumbers — LLC protection is essential before taking any paid work., many owners form an LLC from day one.

Sources

New Hampshire filing fee and annual report fee verified September 2026 against the New Hampshire Secretary of State.

Cost ranges for startup, insurance, job rates and revenue are estimates, not figures from these sources. Fees change; confirm with the agency before you file.

Ready to start?

Form Your New Hampshire Plumbing LLC Today

Northwest handles filing, registered agent, and annual compliance reminders. File directly with the Secretary of State for $100, or let Northwest do everything for $39 + $100.

Start Your Plumbing LLC & Get 1 Year Agent Free→

* Northwest is a third-party service. State fees go directly to the Secretary of State.