Dr. Paul Borosky, DBA, MBA
Business Plan Writer · Business Consultant
How to Write a Plumbing Business Plan That Grows Past the Owner’s Truck
A plumbing company grows one truck at a time. Build the plan around revenue per truck per day, a flat rate price book, and the cash gap between finishing a job and getting paid.
Last Updated: 10/30/2026 · Written by Dr. Paul Borosky, DBA, MBA
Watch First
Watch: How to Write a Plumbing Company Business Plan
Plumbing Company Business Plan Template
Editable Word plan plus an Excel financial model built for a plumbing company. Set trucks, calls, and average ticket, and the projections follow.
- Word business plan plus a video tutorial that walks you through every section
- Excel financial model plus a video tutorial that shows you how to enter your numbers
An AI template hands you a blank file and walks away. This one comes with Dr. Paul showing you how to fill in the plan and the model, on video.
The Problem
Why Do Plumbing Companies Stay Small?
Plumbing companies stay small when the owner is the best tech, the dispatcher, and the bookkeeper all at once. Growth stalls because every new truck feels like a gamble. A plumbing business plan turns each truck into a unit with known revenue and costs, so adding the next one is a math decision, not a leap of faith.
Here is how it usually goes. You are great at the work. The phone rings nonstop. You bill by the hour, you answer calls from under a house, and invoices go out late because you write them at night. Revenue grows, but cash never seems to catch up.
Dr. Paul has spent 14+ years helping 1,000+ owners write plans that work. In trades, the fix is always the same: measure the business by the unit that makes money. For plumbing, that unit is a truck with a tech in it.
Growing a Plumbing Company?
Five Fixes
How Do You Write a Plumbing Business Plan That Works?
1. Project revenue per truck per day
Calls per truck per day times average ticket times days worked. That one formula drives the whole plan. It tells you what each truck must produce and when you can afford the next one.
2. Move to a flat rate price book
Hourly billing punishes your fastest techs and invites arguments. A flat rate price book prices each task in advance, including parts and a margin. Customers know the price before work starts, and your average ticket becomes predictable enough to project.
3. Separate service work from new construction
Service and repair pay at the job. New construction and remodel work often pays on draws, net terms, or with retainage held back. Project each stream separately and show the cash gap in your cash flow so the slow payers do not starve payroll.
4. Sell maintenance agreements
Annual water heater flushes, drain inspections, and priority scheduling for members. Agreements bring in steady revenue, fill slow weeks, and create repair work. Show member count and price as their own revenue line.
5. Hire the office before the next truck
A dispatcher or office manager answers calls, books jobs, and sends invoices the same day. That frees the owner to run the business. Put the hire, the cost, and the timing in the management section, along with who holds the plumbing license.
Section by Section
What Goes in a Plumbing Business Plan?
- 1
Executive summary
Services, service area, number of trucks, the amount you need, and when you break even. Write it last.
- 2
Company description
Ownership, legal structure, licensing, insurance, and the mix of residential service, commercial, and new construction.
- 3
Services and pricing
Repair, drain cleaning, water heaters, repiping, and maintenance plans, priced from a flat rate book.
- 4
Market analysis
Homes and businesses in your service area, other plumbing companies, and where you can win: speed, specialty, or service quality.
- 5
Marketing plan
Local search, reviews, truck wraps, builder and property manager relationships, and follow-up with past customers.
- 6
Operations
Dispatch, scheduling software, truck stocking, warranty and callback process, and safety.
- 7
Management team
License holder, owner role, office staff, and the hiring plan for techs and apprentices.
- 8
Financial projections and funding request
Trucks and equipment, monthly profit and loss, cash flow with payment timing, and what the money will buy.
Example Numbers
How Much Does a Plumbing Company Make per Truck?
These are example numbers only, to show how per truck math builds a full projection. Your ticket, wages, and costs will differ. Assumptions: 3 trucks, 4 paid calls per truck per day, 22 working days a month, a $375 average ticket, parts at 22% of sales, techs paid $34 an hour for 9 hours a day plus 22% payroll burden, and $1,150 a month per truck for payment, fuel, and insurance.
| Line | How it is figured | Monthly |
|---|---|---|
| Paid jobs | 3 trucks × 4 calls × 22 days | 264 |
| Revenue | 264 × $375 | $99,000 |
| Parts and materials | $99,000 × 22% | $21,780 |
| Tech wages | 3 × $34 × 9 hours × 22 days | $20,196 |
| Payroll burden | $20,196 × 22% | $4,443.12 |
| Truck costs | 3 × $1,150 | $3,450 |
| Fixed costs | Office $4,500 + rent $2,800 + insurance $2,000 + marketing $4,000 + software and phones $900 | $14,200 |
| Monthly profit before owner pay and taxes | Revenue minus all costs | $34,930.88 |
Each truck here brings in $33,000 a month, or $1,500 a day. That is the number to track every week. If a truck falls below it, the problem is calls, ticket size, or callbacks, and you can find out which before it hits the bank account.
Avoid These
What Mistakes Do Plumbing Business Plans Make?
- Billing by the hour in the projections. Hourly revenue swings with tech speed. Flat rate tickets are easier to forecast and defend.
- Treating new construction cash like service cash. Draws and retainage delay payment. Show the gap.
- Ignoring callbacks. Warranty trips cost labor and fuel with no new revenue. Budget for them.
- No office plan. An owner who answers every call cannot run more than one truck well.
- Leaving licensing and insurance vague. Name the license holder and show coverage. Lenders and builders will ask.
Real World Use
How a Plumbing Company Owner Uses This Plan
Is the fourth truck worth it?
Say you run the 3-truck company in the example and want to add a fourth. A new tech costs $34 × 9 hours × 22 days × 1.22 = $8,213.04 a month with burden. The truck adds $1,150. Total added cost: $9,363.04 a month.
Each call at a $375 ticket leaves $375 × 0.78 = $292.50 after parts. Break even for the new truck: $9,363.04 ÷ $292.50 = 33 calls a month, or about 1.5 a day.
If marketing can keep that truck at 3 calls a day, that is 66 calls and $9,941.96 in added monthly profit. If it only gets 1 a day, it loses money. So the real question in the plan is not "can you afford a truck?" It is "can you prove the calls are there?"
Plumbers, contractors and many other trades in Hawaii need licenses through the DCCA Professional and Vocational Licensing Division. Get that in place before you plan your launch date. See the Hawaii business plan writer page.
Keep Going
More Videos in This Series
Plumbing Company Business Plan: Company Description
Dr. Paul shows how to write the company description section for a plumbing business. (7:56)
What Is in the Plumbing Company Business Plan Template
He walks through every part of the plumbing company template. (8:01)
Questions
Plumbing Business Plan Questions
How do I write a business plan for a plumbing company?
Should a plumbing company charge flat rate or hourly?
How much does it cost to start a plumbing business?
When should a plumber hire a second tech?
Do I need a business plan for a plumbing company loan?
A plumbing plan follows the same ten steps.
Dr. Paul's How to Write a Business Plan in Ten Steps walks you through each section in order, with the numbers lenders look for in the financials and funding request. Pair it with the plumbing company template.
Written by Dr. Paul Borosky, DBA, MBA, current college professor, business consultant, and author with 14+ years and 1,000+ businesses served.
This page is for general educational purposes only. It is not financial, investment, legal, or tax advice.