What a plumbing invoice should include
A plumbing invoice has to answer the questions a homeowner asks when the bill is bigger than they hoped. The example above is built around them.
- The trip and the diagnosis, on their own line. A service call or diagnostic fee shows the client what they paid for before any part was touched, and it's the line you keep when they decide not to go ahead.
- Parts with brand and model number. "50 gal gas water heater, Bradford White RG250T6N" settles warranty claims and stops "was that really a new one?" calls. For small parts, one line for fittings is fine.
- Labor in hours. "3.5 hours at $115" is easier to accept than a single number, and it shows the work behind a short visit.
- Disposal and permits. Haul-away of the old fixture and the city permit are real costs. When they're missing, they come out of your margin.
- Warranty and terms in the notes. Parts warranty per the manufacturer, your own labor warranty, and when payment is due.
- Emergency or after-hours rates, when they apply, as a separate line rather than baked into the hourly rate, so the client sees why a 2 a.m. call costs more.
Sales tax on plumbing is set by your state, and some states tax parts but not labor. Check your state's revenue department before you set the tax rate.
How to write a plumbing invoice
- Start from the estimate if you gave one. The lines the client approved become the invoice; add anything that changed, with a short reason ("found corroded shutoff, replaced").
- Put the service address on the invoice, not only the billing address. Property managers and landlords pay for many addresses.
- List parts first, then labor, then fees. It reads the way the job happened.
- Add the permit number in the notes if the job needed one. It helps at inspection and at resale.
- Set the due date. "Due on receipt" is normal for residential service calls; commercial clients often expect net 15 or net 30.
- Add a way to pay. A payment link prints as a Pay button on the PDF, and the client can pay before you're back in the van.
Use this plumbing invoice template
If you quote bigger jobs first, the plumbing estimate template shows how to write the scope, exclusions and deposit. For jobs that cross trades, the handyman invoice and HVAC invoice examples show how they bill parts and labor.
Frequently asked questions
What does a plumbing invoice look like?
It looks like the example on this page: your business and the client at the top, a numbered invoice with a date and due date, one line per part, labor and fee, then subtotal, tax and total due, with warranty and payment terms underneath.
What is the difference between a plumbing bill and an invoice?
None in practice. "Bill" is what the client calls it; "invoice" is the document. What matters is that it's itemized and numbered.
Should I charge for the service call if I do the repair?
Many plumbers waive or credit the diagnostic fee when the client goes ahead with the repair. If you do, show it as a line and a matching discount, so the client sees the value.
Can a plumbing invoice be handwritten?
Yes, a handwritten invoice is still an invoice if it has the details above. A typed PDF is easier to read, harder to dispute, and easier to find at tax time.