The short version: ChatGPT can write your quote wording, job update texts, invoice reminders, review replies and social posts, but it does not know your day rate, your call out fee, or what was found on site, so those facts go in after the draft comes back. Tell it the job type, the customer situation and the tone, and most drafts need only your real numbers dropped in before they go out, turning a slow evening of admin into a short, manageable task between jobs.
Where ChatGPT is useful for a trades business
Most of the writing a plumber or electrician does in a day is repetitive: a text telling a customer you are on your way, a quote explaining why a job costs what it costs, a reply to a Google review, a reminder about an unpaid invoice. None of that needs a tradesperson to sit down and think from a blank page each time. ChatGPT does not know your prices or what the job really involved, so it writes the wording and you add the facts, the same way you would use a quote template you built yourself.
A one person plumbing or electrical business can lose an hour a day to this kind of writing between jobs, usually done on a phone in a van between one appointment and the next. A good set of prompts turns that hour into a few minutes of typing the real numbers into a draft that is already written, leaving more time for the paid work.
Prompts for quotes
- "Write a quote email for a [job, e.g. boiler replacement] at £[price], explaining what is included, what is not, and how long the work will take."
- "Draft an explanation of why an emergency call out on a Sunday costs more than a weekday booking, for a customer questioning the price."
- "Write a short paragraph explaining the difference between a like for like repair and a full rewire, so a customer understands why one quote is higher."
- "Rewrite this quote so it reads clearly for someone with no trade knowledge: [paste your draft]."
- "Write a follow up message to a customer who has not responded to a quote sent a week ago, checking if they have questions."
Prompts for job update texts
- "Write a text message telling a customer I am on my way and will arrive in [number] minutes."
- "Draft a message explaining a job is taking longer than quoted because [reason, e.g. a hidden pipe needed replacing], with the revised time and any extra cost."
- "Write a message to send after finishing a job, summarising what was done and any advice for the customer, such as when to book a service."
- "Write an apology message for arriving late to an appointment, brief and without over-explaining."
Prompts for review replies
- "Write a reply to a five star review praising punctuality and tidiness, thanking the customer by first name."
- "Write a calm reply to a review complaining about the price, explaining what is included in a call out fee without sounding defensive."
- "Draft three variations of a thank you reply for reviews that mention 'reliable' and 'fair price' so replies do not read the same down the page."
- "Write a reply to a review about a repeat customer, thanking them for coming back without naming the specific job."
Prompts for social posts
- "Write a Facebook post about a common winter problem, [e.g. frozen pipes], explaining one thing homeowners can check themselves before calling a plumber."
- "Write a short post announcing we now cover [new area], aimed at homeowners searching for a local tradesperson."
- "Turn this before and after job photo into a short caption explaining what was done, under 30 words."
- "Write a post explaining why homeowners should use a Gas Safe registered engineer, in plain language, no scare tactics."
Prompts for admin and invoices
- "Write a polite reminder message for an invoice that is seven days overdue, firm but not aggressive."
- "Draft a message to a customer asking for a Google review after a job well done, sent the day after completion."
- "Write a short message to send to a supplier chasing a delayed parts order, polite but clear about the deadline."
- "Draft an end of year message to loyal customers thanking them for their business over the year."
What to change in every prompt
Every prompt above needs the real price, the actual job detail, the real customer name and the real time added in before it is sent. ChatGPT does not know your call out fee, your day rate, or what the job on site turned out to need, so never let it guess a figure into a quote. Ask for British English and a plain, direct tone, since most trades customers respond better to a short, clear message than a long, formal one.
It also helps to tell it whether the message is going by text or email, since a text needs to be short enough to read at a glance while a quote email can run to a few short paragraphs with a clear breakdown of cost.
One weak prompt and one strong prompt
Weak: "Write a quote for a customer."
Nothing to work with. ChatGPT will invent a generic job and a generic price structure that has no relation to the work carried out, and the whole draft will need rewriting from the first line.
Strong: "Write a quote email for replacing a combi boiler with a new one of the same size, at £2,400 including parts and labour, with a two year guarantee on the work. Explain what happens on the day and how long it takes."
Naming the job, the price, what is included and the guarantee gives ChatGPT enough to produce a quote you can send with only the customer's name and address added. The gap between the weak and strong version is not about the model getting cleverer, it is about how much detail about the job it was told before it started writing, and that holds true across every prompt in this list.
Mistakes to avoid
The biggest mistake is letting ChatGPT write anything that sounds like a safety judgement, such as whether a wiring fault is dangerous or whether a boiler is safe to keep running; that always needs a qualified engineer's own assessment on site, never a generic answer typed into a chat window. The second mistake is sending a price ChatGPT has guessed rather than the price you worked out for the job, which is an easy way to under-quote or lose a customer's trust. The third is copying the same review reply word for word every time, which starts to look automated to anyone scrolling through your reviews. A fourth mistake is letting a drafted quote go out with the wrong VAT treatment or a missing call out fee line, since ChatGPT has no way of knowing your registration status or your standard terms unless you tell it every time. A fifth, smaller mistake is forgetting to ask for British English, since the model will sometimes default to American spellings such as "color" or "aluminum" that look out of place on a UK invoice.
I have written more around this on the site: ChatGPT prompts for tradespeople quotes: 20 to copy and use today, How to Check Whether ChatGPT Is Recommending Your Business, How to Build an AI “Second Brain” for Your Small Business (Without Paying for Another Subscription).
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For the rest of the series, see the ChatGPT Prompts and Limits: 30 Guides to Fun Prompts, Photo Edits and Daily Caps.
Related tool: my free tool that writes the prompt for you.
Frequently asked questions
Can ChatGPT work out a fair price for a job?
No. It has no knowledge of your costs, your area or the work involved, so every price in a draft is a placeholder you replace with your own figure before sending. Trades pricing depends on parts cost, travel time and local competition, none of which the model can see, so treat any number it suggests as a guess rather than a quote.
Is it safe to describe a customer's job in a prompt?
Keep it to the type of job, not the customer's name or exact address, and add the personal details afterwards in your own quote template or messaging app. This keeps the customer's details out of a third party service and takes no extra time once it becomes a habit.
Will using ChatGPT make my messages sound less like me?
Only if you send the first draft unedited. Add your own short phrases and sign off, and most customers will not notice the difference from a message you typed from scratch. A quick edit to shorten a sentence or swap a word for how you naturally speak usually takes less than a minute.
Can it help chase unpaid invoices?
Yes, it can draft a polite first reminder and a firmer second one, but the amount owed and the payment terms should come from your own invoice, not a guess. A short, clear message tends to get paid faster than a long one that buries the amount and the deadline in the middle of a paragraph.
What is the fastest prompt to start with?
The job update text and the review reply are used most often, so start there, agree a tone that matches how you talk to customers, and build out the rest of the list once those two feel natural. Most sole traders find the quote email prompt saves the most time overall, since it is the one that used to take the longest to write from scratch.
Related reading: AI for Tradespeople: What Helps UK Plumbers and Electricians in 2026.
