What can AI do in a small plumbing or electrical firm?
AI in a small trade firm handles the contact around a job, such as replying to missed calls, chasing quotes and turning job notes into invoices. The engineer keeps the diagnosis, the price and every safety decision, along with the paperwork the law puts on the firm.
Bedrock AI’s view is that a trade firm’s first AI job is the phone. A missed call is the only admin task that can lose a paying job the same afternoon.
How much do missed calls cost a small trade firm?
Work it out with your own numbers before buying anything. Here is the sum for a firm with three engineers, using example figures you should replace with yours.
- Missed calls a week while everyone is on the tools: 20
- Of those, calls that were new work: 10
- New-work callers who book someone else before you ring back: 4
- Average value of a small job: £200
That is 4 × £200 = £800 of work a week going to other firms. Over 48 working weeks it comes to £38,400 a year, before counting the repeat work those customers would have brought.
A missed-call text-back replies within a minute, asks for the job and the postcode, and offers a call-back time. The engineer still rings back and prices the job. If that text keeps two of the four callers, the firm wins back about £19,200 of work a year on these figures.
What changes when AI books the job?
A job booked by AI still needs the cancellation paperwork, because the Consumer Contracts Regulations apply however the booking was made. For a service contract the customer can cancel for 14 days after the contract is entered into.
You must not start work in that period unless the customer makes an express request. When the job was agreed away from your premises, such as at the customer’s kitchen table, that request must be on a durable medium, such as an email.
The cost of getting this wrong falls on the firm. If the request or the cancellation information is missing, the customer who cancels pays nothing for the work already done.
This is where AI earns its place. An assistant that sends the booking confirmation can attach the cancellation notice and ask the customer to reply in writing if they want you to start early. The reply sits in the job record if a dispute comes later.
Why should AI never give a customer technical advice?
AI should never give technical advice on a fault, because the firm answers for anything its assistant tells a customer. Gas is the clearest line. The Gas Safety (Installation and Use) Regulations allow only firms in an HSE-approved class of persons to work on gas fittings, which in practice means Gas Safe registration.
A chatbot that tells a customer how to reset a boiler or test a socket is giving the advice your registration exists for. Set the assistant to collect symptoms, photos and the make and model, and to give the gas emergency number, 0800 111 999, if anyone mentions a smell of gas.
What about the books and the tax return?
AI can turn receipts and job notes into tidy records, and that matters more for sole-trader plumbers and electricians from April 2026. HMRC’s Making Tax Digital for Income Tax applies from 6 April 2026 to sole traders with qualifying income over £50,000, falling to £30,000 in April 2027 and £20,000 in April 2028.
Qualifying income means turnover before expenses, so a busy one-van firm crosses the line sooner than its profit suggests. Your accountant still signs off what goes to HMRC. Our accountants page covers that side of the job.