A plumbing invoice gets handed over at the door or sent before the truck leaves the street. It needs the labor-parts split, your license number, and terms that say due on receipt — this one has all three filled in.
Service call — diagnostic and estimate1$95.00$95.00
Water heater replacement — labor1$680.00$680.00
50-gal gas water heater (unit)1$899.00$899.00
Haul-away and disposal of old unit1$60.00$60.00
Subtotal$1,734.00
Sales tax (6%)$104.04
Total due$1,838.04
Notes
Service address: 907 Aspen Ct. Old unit hauled and disposed.
Terms
Due on receipt by card. 12-month warranty on labor.
Pay $1,838.04
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The anatomy
What belongs on the invoice
On the document
Your license number when your state or trade rules require it
The service address, which isn't always the billing address
Labor and parts as separate lines — itemized work reads honest
The service call or diagnostic fee, stated up front
Your warranty on the work, in the terms
The service date, so the record stands on its own later
Common line items
Service call — diagnostic and estimate
Water heater replacement — labor
50-gal gas water heater (unit)
Drain clearing — main line
Haul-away and disposal of old unit
Emergency call-out — after hours
Rates are yours to set — the generator does the math.
01
Collect before you leave
The job-done moment is the easiest payment you'll ever take. An invoice with online card payment handed over on site beats one mailed and chased for three weeks.
02
Split labor from parts
Customers trust an invoice they can read: what the part cost, what the work cost. Some states also tax parts and labor differently, so the split keeps your books clean too.
03
Show your license where required
License-display rules vary by state and trade. Confirm yours, then keep the number on the invoice when required; it also helps customers verify who completed the work.
General invoicing guidance, reviewed July 16, 2026 — not tax or legal advice. Rules vary by location and trade; confirm current requirements with the relevant authority or a qualified adviser.
FAQ
Questions, answered
What payment terms do plumbers use?
Due on receipt is the residential standard — the work is done and verified on the spot. For commercial property managers, Net 14 or Net 30 is common; agree before the work starts.
Do I charge sales tax on plumbing work?
It depends on your state — parts are commonly taxable while labor rules vary widely. This template splits labor and materials so applying your state's treatment is straightforward. When in doubt, ask your accountant.
Should the diagnostic fee be on the invoice?
Yes, as its own line — and tell the customer about it when booking. Many plumbers credit it toward the repair if the customer proceeds; the invoice can show exactly that.
Can I send an estimate first?
Switch this template to quote mode — same document, "Quote" instead of "Invoice", with a valid-until date. When the customer accepts, turn it back into the invoice in a few clicks.