Field service invoice software
- Invoice total
- $274.72
- Labor
- $135
- Parts, at your markup
- $84
- Sales tax on the parts
- $6.72
Every figure on this page is computed from the inputs entered, by the method stated below it. FlatRateBook publishes no labor rate, no markup, no tax rate and no survey: the defaults are a worked example to replace with your own costs.
The figures above start from a worked example ($274.72). Change any input and the answer updates as you type.
Download the Field service invoice software worked example (CSV)
This is field service invoice software that adds up the call in the order the customer reads it. Labor hours at your rate is the labor; parts at your cost plus your markup is the parts line; sales tax at your rate applies to the parts; the trip or diagnostic charge goes on its own line; and the invoice total is the last and largest figure. Every figure is yours; the invoice publishes no rate, no markup and no tax rate. Free, on the page, no account; the paid plan saves every invoice against the customer and the job, brands it and sends it.
Labor at the rate the call was priced at
Hours on the call times the labor rate is the labor line, and the rate should be the one the field service pricing calculator on this site produced from your costs, not a round number from the competitor's van. An hour and a half at $90 is $135 on the worked example, shown on its own so the customer sees the hours and the rate.
Parts at your markup, tax on the parts at your rate
Parts at your cost plus your markup is what the customer pays for them: $60 marked up 40% is $84. Sales tax applies to the parts at your state's and your city's rate, shown as its own line; whether labor is taxed where you work is your state's rule, and the invoice applies the rate to the parts only and publishes none.
The trip charge on its own line, then the total
The trip or diagnostic charge is a line the customer agreed to before the visit, and it goes on the invoice as itself rather than folded into the labor. Labor plus parts plus tax plus trip is the total, $274.72 on the worked example. The paid plan keeps the invoice against the job, sends it, and takes payment by a pay link to your own account.
Field service invoice software: common questions
Is this free field service invoice software?
Yes. Enter the labor hours, your rate, the parts at cost, your markup, the trip charge and your tax rate on parts, and it works out the labor, the parts, the tax and the total on the page with no account and no card. Print it as it stands. FlatRateBook Pro adds your company name and logo, a PDF without our line, and saving and sending every invoice.
What should a field service invoice include?
The customer's name and service address, the date and the technician, what was done in plain words, labor hours at the rate, parts at the billed price, sales tax where it applies, the trip or diagnostic charge, the total and how to pay, and your license number where your trade requires it. The free invoice carries the figures; the paid plan adds your name, license and pay link.
Should I charge sales tax on labor?
It depends on the state: many tax parts and not repair labor, and some tax both or tax labor on certain work. The invoice applies your rate to the parts and leaves labor untaxed, which fits the common case; if your state taxes the labor too, your state's rule is the authority and your adviser knows which.
FlatRateBook Pro
Keeping what you make
The tools are free forever. Pro turns them into the book: every customer and every job kept, the rate the call was priced at and the invoice it produced filed against it, your name and logo on the paperwork, no watermark, and an export when the accountant asks.
- Download as PDF
- No FlatRateBook watermark
- Save every invoice and report and reopen it later
- Your company name and logo on the invoice
- Export every invoice and report in one go
- Invoice-sent and follow-up-due reminders emailed to your customers
- Connect your own Stripe account and get paid online
- Connect your QuickBooks Online or Xero
$59per month, whole crew
Start FlatRateBook Pro PricingRenews monthly at the price above until you cancel. We email you before any price change.
Cite or embed this figure
Field service invoice software (Invoice total): $274.72, FlatRateBook, worked example.
Cite as: "Field service invoice software, FlatRateBook", updated 2026-09-03, https://flatratebook.com/tools/field-service-invoice-software/.