How to price plumbing jobs so you actually make money

Ask ten solo plumbers how they set their rates and you'll hear the same answer nine times: "I charge about what the other guys around here charge." That's not a pricing strategy — that's copying someone else's homework without knowing if they passed. If you're busy all week and still tight at the end of the month, your prices are the problem, and this is how you fix them.

Step 1: Find your real hourly cost

Your rate has to cover a lot more than your time on the wrench. Before a single dollar of profit, every billable hour has to pay for:

• The salary you actually want. Not "whatever's left over" — a real number, decided in advance, that you'd accept from an employer.
• Overhead. Truck payment, fuel, insurance, license renewals, tools, phone, software, advertising. Add it up for a year — the total is almost always higher than the number in your head.
• Self-employment taxes. Roughly 15% off the top before income tax. If your rate doesn't include it, April does.
• Unbillable hours. This is the one that quietly kills solo plumbers. Driving, quoting, invoicing, ordering parts, callbacks — you might work 50 hours to bill 30. Your billable hours carry the whole week, so divide by 30, not 50.

Salary plus overhead plus taxes, divided by billable hours per year, is your break-even rate. Your price is that number plus a real profit margin — 20% or more, because slow months, truck repairs, and health insurance premiums are coming whether you planned for them or not. Want the math done for you? Use our free hourly rate calculator — plug in your numbers and it shows the rate you should be charging.

Step 2: Pick flat rate or time-and-materials — deliberately

Flat rate means quoting one price for the outcome: "$385 to replace the disposal." Customers love it because there's no meter running, and it pays you for being fast — if experience lets you finish in half the book time, you keep the difference. The risk is on you when a job goes sideways.

Time-and-materials bills your hourly rate plus parts. It protects you on unpredictable work — mystery leaks, old houses, anything behind a wall — but it punishes efficiency and invites "why did that take two hours?" conversations.

Most successful solo shops land on a hybrid: flat rate for the twenty jobs that make up most of the calendar (water heaters, disposals, faucets, toilets), time-and-materials with a stated hourly rate for diagnostics and surprises. Whichever you quote, put it in writing before you start — a clear estimate the customer approves up front is the difference between "that's what we agreed" and an argument in a driveway.

The underpricing traps

• Matching the lowest guy in town. You don't know his costs, and there's a decent chance he's going out of business slowly. Compete on answering the phone and showing up on time — most of your competitors fail at both.
• Never raising prices. Materials, fuel, and insurance go up every year. A rate that stands still is a pay cut on a schedule. Review it annually, announce nothing, and note that almost no customer ever asks.
• Marking up materials by zero. Sourcing, stocking, and warrantying parts is work. A 25–50% markup on materials is standard in the trades, not gouging.
• Discounting out of awkwardness. If a customer flinches at the quote, the move is to explain what's included — not to knock $50 off. The customers who grind you on price are reliably the ones who also pay late and call the most.

The bottom line

Price from your own numbers, not the competition's. Know your break-even rate, add a margin you don't apologize for, quote it in writing, and raise it every year. Being the cheapest plumber in town is a race you win by losing.