Updated October 22, 2026
This plumbing estimate calculator turns a job you can picture into a flat-rate price: how long it takes, how many techs, what an hour of a tech really costs you, the truck and office overhead each billable hour has to carry, the parts and your markup, the trip charge and an after-hours multiplier. You get the price to quote, the billable hourly rate behind it, the margin on the whole job and the break-even.
Quick answer: Flat-rate price = tech hours × (labor cost + overhead per billable hour) ÷ (1 − labor margin) × after-hours multiplier + parts × (1 + markup) + trip charge + permit. Tech hours = (job hours + drive) × techs. Break-even = labor and overhead cost + parts cost + permit.
An estimate from the numbers you entered, not a market price. Put in your own costs for a number you can stand behind.
Home service businesses answer only about half their calls (Invoca, July 2026), and owners spend about 11 to 16 hours/week on admin. Pricing is the easy part; the money leaks out in the calls you can't take, the quotes nobody chases and the invoices that sit unpaid. Unmanually is a 24/7 AI Office Manager for plumbers that you run by voice from your phone:
Sources: Invoca, July 2026 (52% of home-service calls answered by a person, 60M+ calls); admin hours: Time etc / Censuswide 2023 and Amex SME Barometer 2026.
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tech hours = (job hours + drive minutes ÷ 60) × techsbillable rate = (labor cost + overhead per billable hour) ÷ (1 − labor margin) × after-hours multiplierparts price = parts cost × (1 + markup)flat-rate price = tech hours × billable rate + parts price + trip charge + permitbreak-even = tech hours × (labor cost + overhead) + parts cost + permitjob margin = (price − break-even) ÷ price
These are assumptions for illustration, not market figures. Swap in your own.
A 2-hour job for one tech with a 30-minute drive, $120 of parts, regular hours. Tech labor costs $38 an hour with burden, overhead runs $55 per billable hour, 25% margin on labor, 50% parts markup, $59 trip charge.
Tech hours are 2 + 0.5 = 2.5. Each hour costs $38 + $55 = $93, so labor and overhead cost $232.50. The billable rate is $93 ÷ 0.75 = $124 an hour, and labor is priced at 2.5 × $124 = $310. Parts at 50% markup are $180, a 33.3% margin on parts. Add the $59 trip charge and the flat-rate price is $549. Break-even is $232.50 + $120 = $352.50, so the job makes $196.50 of gross profit, a 35.8% margin on the whole job.
The same call on a Sunday night at ×2 labor comes to $859: labor doubles, parts and the trip charge don't.
A tech may be paid for 40 hours and bill 25. The truck, the shop, insurance, the office, phones and marketing all have to be paid by those 25 billable hours. Divide a year of overhead by a year of billable hours and add that to the tech's burdened wage; that is your real cost per hour, and it is usually far higher than owners expect.
Customers prefer a firm number before you start, and flat rates reward fast, well-stocked techs. Time and materials still fits jobs you can't see into: a slab leak, a collapsed line, a remodel rough-in. Many shops quote flat rate for the common tasks in a price book and switch to an hourly estimate with a not-to-exceed figure when the scope is unclear.
A single markup across all parts overprices big items and underprices small ones. Many plumbers mark up a $10 fitting by several times and a $1,200 water heater by much less. Whatever you choose, know the margin it gives: doubling the cost is a 50% margin, and a 50% markup is only 33%. Keep a price book so every tech charges the same for the same part.
A trip or dispatch charge pays for the drive when the customer decides not to go ahead. Credit it toward the repair if you like, but have it on the ticket. For drain and leak calls, a diagnostic fee with camera time keeps the free-look calls from eating the day.
Burst pipes and backed-up sewers don't wait for Monday. Price the inconvenience into labor with a multiplier, and say it on the phone before you roll so nobody is surprised by the invoice. Track how many emergency calls you take each month; if they keep the tech up all night, the next day's schedule pays for it too.
A homeowner with water on the floor calls plumbers until one answers. Unmanually is an AI Office Manager that works 24/7 and that you run by voice: the AI Office Manager answers, asks what is leaking or clogged, how bad it is and the address, gives your flat rate or trip charge, books the tech and texts the confirmation, then sends the invoice and chases it. See what Unmanually does for plumbers, or get a free website that calls every new lead back in about a minute.
What the AI Office Manager does for plumbing businesses, from calls to invoices.
Flat rate, overhead and parts markup in more depth.
Scheduling and dispatch when the phones ring all day.
Pricing calculators and templates for every trade.
Estimate the hours, multiply by your cost per hour (burdened labor plus overhead per billable hour), divide by one minus your margin, then add parts with markup and any trip charge. The calculator does each step and shows it.
Whatever covers labor, overhead and profit. With the worked example's assumptions ($38 labor, $55 overhead per billable hour, 25% margin) the billable rate is $124 an hour. Your overhead and billable hours decide your number.
It varies by shop and by part, often on a sliding scale with higher markups on cheap parts. Whatever you use, know the margin: a 50% markup leaves a 33.3% margin, and doubling the cost leaves 50%.
A trip or dispatch charge covers the drive when the customer doesn't go ahead with the repair. Some shops credit it toward the job. Enter 0 if your flat rates already include travel.
Many shops use a multiplier on labor, for example 1.5 for evenings and 2 for nights and holidays. This calculator applies it to labor only, so parts and trip charges are not multiplied.
Pick the job type and the calculator compares your flat-rate price with the typical customer price range Housecall Pro lists (updated October 2026), for example $100 to $275 for drain clearing and $900 to $3,000 for a tank water heater. Below the range usually means your hours or overhead are low; above it means you need to show the customer why.
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