The problem
Customers and property managers want to know what was wrong, what was done and what to watch, and a good write-up heads off the 'why did it cost that much' call. Many plumbers type these at night. At 25 jobs a week and 6 minutes each, that's about 10.75 hours a month, mostly in the evening.
What the AI does
After each job, dictate a quick voice note: what you found, what you did, parts used and anything to watch, like a water heater near the end of its life. Paste the notes into ChatGPT, Claude or Gemini with a short standing instruction for your style, and get back a plain-English summary for the customer and a line for the invoice. Read it, fix anything wrong and send it from your job software.
A worked example
A two-plumber company in Atlanta does about 25 jobs a week, many for property managers who want a write-up on every visit. Each plumber dictates notes in the truck, and the owner turns them into summaries with an assistant at the end of the day.
Before
About 6 minutes a job typing write-ups, about 10.75 hours a month
After
About 2 minutes a job to paste and check, saving about 7 hours a month
What it's worth
About $315£237€282A$455C$445 a month of time saved, against free to about $20£15€18A$29C$28 a month for an assistant. That's 4 minutes saved on each of about 107 jobs a month (25 a week times 4.3), about 7 hours, at an assumed $45£34€40A$65C$64 an hour.
How to set it up
- Choose one assistant: ChatGPT, Claude and Gemini all have free plans, and paid plans for one person cost about $20£15€18A$29C$28 a month.
- Write a standing instruction once: short sentences, what was found, what was done, parts, what to watch, no prices unless given, and keep it in a note to paste each time.
- Dictate your notes in the truck before you leave the job, while the details are fresh.
- Leave out names and addresses when you paste; add them back in your job software.
- Read every summary before it's sent. You're the licensed plumber; the write-up says only what you found and did.
What goes wrong
- AI can fill gaps with things you didn't say, like a code requirement or a warranty term. Delete anything you didn't do or check.
- Don't let a summary diagnose what you didn't inspect. 'Recommend a camera inspection' is better than a guess about the sewer line.
- Free plans have usage limits; a busy day may need a paid plan.