# Missed Calls Cost UK Small Firms £3.7bn a Year. An AI Receptionist Answers Every One Published 29 October 2026 by Prad Patel. Tags: AI Tools, Small Business. Page: https://kaizenaiconsulting.com/missed-calls-ai-receptionist-uk/ Missed calls cost UK small businesses an estimated £3.7bn a year. That is the headline from [research BT Business commissioned with Censuswide](https://technologyreseller.uk/ai-from-bt-launched-to-help-uk-firms-securely-adopt-ai-with-confidence-targeting-3-7-billion-lost-through-missed-calls/), published alongside the launch of its own AI receptionist this month. The same survey found that 67% of small firms say they miss at least one call on an average day that they believe loses them business. If you run a business where the phone brings in the work, that number will not surprise you. You are on a job, with a customer, driving, or simply busy, and the phone rings out. Some of those callers leave a voicemail. Plenty ring the next name on the list instead. This is the problem an AI receptionist is built to fix, and in our view it is one of the clearest money-for-time trades in AI for small businesses right now. Here is what one does, what it costs against hiring someone, and how to try one without risking your customers. ## What an AI receptionist actually does An AI receptionist is a voice assistant that answers your business number when you cannot. It speaks to the caller in natural language, not a "press 1 for sales" menu. A typical set-up covers four jobs: - **Answers every call, at any hour.** Evenings, weekends and the middle of a job are covered. - **Handles the routine questions.** Opening hours, areas you cover, rough prices, what to bring. You give it the answers once. - **Takes the details and books the job.** Name, number, what they need and when, and if you connect your diary, a slot in your calendar. - **Sends you a summary.** Who called, what they want and how urgent it is, so you call back the jobs worth having. BT's version, launched on 1 October, is a good example of where the market has got to. According to [coverage of the launch](https://www.telecomstechnews.com/news/bt-business-launches-ai-receptionist-for-customer-calls/), it answers 24/7, handles routine enquiries, books appointments into Outlook or Google Calendar, transcribes calls and works with your existing number. BT is aiming it at trades, estate agents, professional practices, retailers and hospitality, which is to say anywhere a phone call turns into paid work. ## What it costs, against a hire A full-time receptionist in the UK earns about £19,000 a year on average, according to [Payscale](https://www.payscale.com/research/UK/Job=Receptionist_or_Information_Clerk/Salary), and noticeably more in London. That is before National Insurance, holidays and cover for sickness, and a receptionist still goes home at half five. AI receptionist pricing varies a lot by provider and call volume. UK vendor guides put most small-business plans at roughly £150 to £500 a month, which is about £1,800 to £6,000 a year. BT has not published a headline price, and most providers charge by minutes or calls, so get a quote based on how many calls you actually take. The more useful comparison is not against a salary. It is against the value of one job. If an average job is worth a few hundred pounds to you, a plan at £150 a month pays for itself if it catches one extra booking a month that would otherwise have gone to voicemail. You know your own numbers better than any survey, so run that sum for your business. ## How to work out what you are missing Before you buy anything, measure the problem for one week. Most phone systems and mobile networks show missed calls in the call log. Count three things: - How many calls went unanswered during working hours. - How many came in evenings and weekends. - How many of those numbers never called back. Multiply the ones that never called back by your average job value and a realistic win rate. If that figure is bigger than the monthly cost of a plan, the decision makes itself. If it is tiny, you probably do not need one yet, and that is worth knowing too. ## How to try one safely We would set one up the same way we would roll out any AI tool: small, checked and easy to switch off. - **Start with overflow only.** Let the AI answer when you do not pick up after a few rings, or outside opening hours, rather than replacing you on every call from day one. - **Write its script yourself.** Give it your real answers on prices, areas and timings, and tell it what it must not promise, such as fixed quotes or arrival times. - **Always offer a human.** Callers should be able to leave a message for you or ask for a call back, and the AI should say it is an assistant. - **Read every summary for the first fortnight.** Check it took the details down correctly and booked sensible slots before you trust it with your diary. - **Check where call recordings and transcripts are stored.** They contain customer details, so ask the provider how long they keep them and where. ## One thing to watch An AI receptionist is good at routine calls and bad at judgement. A distressed customer, a complaint or an emergency needs a person. Make sure urgent calls are flagged straight to your mobile, not just written up in a summary you read at the end of the day. ## Where to start Count your missed calls this week. If the number surprises you, that is your business case. If you would like a hand choosing a provider, writing the call script or connecting it to your calendar, we offer a free 30 minute AI audit, and the booking button is below. How many calls do you think your business misses in a week? **Prad Patel** ran Glass Tailors for twelve years, growing it to 12 staff and around £1m turnover. He now builds AI systems, quote tools and marketing for owner-run businesses, and shows them how they work. [About Prad](https://kaizenaiconsulting.com/about/)