Pricing and estimating

How to price plumbing jobs

Service plumbing is priced per task from a flat-rate book. New construction is priced per fixture or by phase. Both rest on the same base: your true cost per billable hour plus material, overhead, and profit.

A project engineer in a hardhat and safety vest uses a rugged tablet beside steel wall framing.
Capture field information where the work happens, then route it to the people who need it. AI-generated illustration.

To price plumbing jobs, calculate what one billable hour costs your company (burdened wage, van, overhead, divided by hours actually billed), then build prices on top. Service work gets a flat-rate price per task: standard hours times your billable rate plus marked-up parts. New construction and remodels get priced per fixture or per phase from a takeoff, with overhead and profit added at the end. Quoting from the plumber's wage, or from what the shop down the road charges, is how plumbing companies end up busy and broke.

How plumbers price different kinds of work

Common plumbing pricing methods
Work typeUsual methodWhat drives the price
Service and repairFlat rate per taskTask time, parts, trip charge
Water heater replacementFixed package priceUnit, venting, code upgrades, haul-away
Drain and sewerFlat rate, or camera first then quoteAccess, line length, equipment
Remodel rough-in and trimPer fixture or lump sumFixture count, wall access, existing conditions
New constructionPer fixture or by phaseFixture count, underground length, stories
Unknown scopeTime and materialsHours and materials used

Step 1: know your cost per billable hour

The Bureau of Labor Statistics reported a median wage of $30.67 per hour for plumbers, pipefitters, and steamfitters in May 2025. Wages in your area may differ. To that wage add labor burden (payroll taxes, workers' comp, benefits), the van, and the plumber's share of overhead. Then divide by billable hours, not paid hours.

Here is an illustration with made-up numbers. A plumber earns $34 an hour for 2,000 paid hours ($68,000). Burden at 30 percent adds $20,400. The van costs $17,000 a year, and this plumber's share of overhead is $50,000. Total cost: $155,400. If the plumber bills 1,250 hours, cost per billable hour is $124.32. At a 20 percent net margin, the billable rate is $124.32 divided by 0.80, or about $155 per hour.

Step 2: set flat-rate service prices

For each task in the book, set a standard time that includes setup, cleanup, and paperwork, then multiply by the billable rate and add the part at your markup. Example, using the illustration above: replacing a toilet fill valve and flapper is set at 0.6 hours, so $93 labor, plus $18 in parts marked up to $45, for a flat rate of $138. A kitchen faucet swap at 1.25 hours is $194 labor plus the faucet. Check task times against what techs actually log every six months.

Add a trip or diagnostic charge so short calls pay for the drive. Many shops credit it toward an approved repair. Set it from your own numbers: the average drive time to a call, times your billable rate, plus a few minutes of diagnosis. Show it on the booking confirmation so nobody is surprised at the door, and train CSRs to explain it the same way every time.

Step 3: price construction by fixture or phase

On new construction, many plumbers price per fixture (each toilet, lavatory, tub or shower, sink, hose bib, water heater, and so on), with the per-fixture number built from tracked labor hours and material for underground, rough-in, top-out, and trim. Larger commercial jobs get a full takeoff with pipe by size and length, fittings, hangers, and equipment.

Example: per-fixture bid for a three-bath house (illustrative numbers only)
ItemQuantityUnit priceTotal
Toilets3$650$1,950
Lavatories4$600$2,400
Tubs and showers3$900$2,700
Kitchen sink, dishwasher, ice maker1 set$1,100$1,100
Laundry box and hose bibs1 set$700$700
Water heater install1$1,400$1,400
Underground and water service1$2,600$2,600
Permit and inspections1$450$450
Total bid$13,300

In this example each unit price already includes labor, rough material, overhead, and profit; owner-supplied fixtures are excluded and stated as such in the bid. Write those clarifications down. See how to write bid clarifications and exclusions.

Water heaters and other package prices

Water heater replacements are where many shops make or lose the month. Price them as packages: the unit, expansion tank if required, venting changes, gas or electrical connections, drain pan, haul-away, permit, and labor. Then build adders for the things that turn a two-hour swap into a full day, such as a tight closet, an attic install, a switch from tank to tankless, or code upgrades the inspector will call. Publish the base package and adders in your book so every tech quotes the same way.

Remodels and hidden conditions

Remodel plumbing carries more unknowns than new work. Old galvanized lines, undersized drains, and previous owner repairs show up only when the wall is open. Price the known scope per fixture, then put unit prices in the contract for common surprises (replace a section of drain per foot, add a shutoff valve, reroute a vent). That turns a hidden condition into a priced change order the homeowner already agreed to in principle, instead of a tense conversation over an open wall.

Overhead, markup, and material swings

Load overhead in one place. If it is already inside the billable rate, do not add it again as a percentage on top. Set profit as a margin target and convert correctly; markup vs margin in construction shows how. Copper, PVC, and water heater prices change during long jobs, so put a price validity date on bids and an escalation clause on long construction contracts. Recheck the overhead rate whenever you add a van or office hire.

Price only compliant products

Federal rules define lead-free plumbing products as a weighted average of 0.25 percent lead on wetted surfaces for pipe, fittings, and fixtures, and 0.2 percent for solder and flux. Keep noncompliant stock out of the price book and off the van.

Close the loop

Track actual hours and materials by phase on every construction job and by task on service calls. If trim runs over on every house, raise the trim portion of your fixture price. Smart Business Automator compares estimated and actual cost on each job so the next bid uses real numbers. The plumbing software guide covers price book tools for service work.

Frequently asked questions

Should plumbers charge flat rate or hourly?

Most residential service plumbers use flat rate so customers approve a known price. Hourly or time and materials still makes sense for commercial service and work where the scope is unknown.

How do plumbers price new construction?

Usually per fixture or by phase (underground, rough-in, top-out, trim), with unit prices built from tracked labor hours and material. Large commercial jobs are priced from a detailed takeoff.

What should a plumbing trip charge cover?

The drive time, vehicle cost, and the first part of the diagnosis. Many shops credit it toward the repair if the customer approves the work.

How often should I update my plumbing price book?

Update parts prices whenever supplier costs change and review task times at least twice a year against actual job data.

Sources

  1. Bureau of Labor Statistics: Plumbers, pipefitters, and steamfitters
  2. EPA: Use of lead free pipes, fittings, fixtures, solder, and flux for drinking water
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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