How much does an AI receptionist cost in the UK?
FlowGenix Automations is a UK AI automation consultancy based in Basingstoke, Hampshire. This guide publishes the real 2026 GBP pricing for AI receptionists in the UK — the numbers most vendors won't put on their website — so a UK SME owner can make a decision without a sales call.
Short answer: expect a one-off build of £1,500–£4,500 and a monthly cost (retainer plus usage) of £280–£1,100 for a typical UK small business. The detail below explains exactly what drives you toward the low or high end.
What are the actual cost components of a UK AI receptionist?
An AI receptionist has three cost lines: (1) the one-off build fee, (2) the monthly retainer covering support and hosting, and (3) per-minute call usage on the underlying voice and telephony platforms. Any vendor quoting a single all-in flat fee is bundling those together — fine, but ask them to show the breakdown.
| Line | Typical UK small business | Typical UK multi-site |
|---|---|---|
| One-off build | £1,500–£2,500 | £2,500–£4,500 |
| Monthly retainer | £250–£550 | £550–£950 |
| Voice + telephony usage | £30–£120/month | £100–£350/month |
| Monthly total (typical) | £280–£670 | £650–£1,300 |
What drives the build fee up?
- PMS or CRM integration depth (dentistry PMS like R4 with no public API costs more than Dentally with a modern API).
- Number of call scenarios in scope — a single "book an appointment" flow is quick; a full triage tree with 20+ intents is not.
- Multi-site or multi-brand routing logic and shared waitlists.
- Bilingual support (Welsh, Polish, Punjabi).
- Custom voice cloning versus stock ElevenLabs UK voices.
What drives the monthly cost up?
Monthly cost is mostly call volume. A dental single-surgery averaging 400 answered minutes a month sits around £45 in VAPI + Twilio + ElevenLabs usage. A busy trades line handling 1,200 minutes a month sits around £120. Add SMS if you run missed-call text-back (roughly £0.04 per outbound SMS on Twilio UK).
How does this compare with a human answering service?
UK human answering services (Moneypenny, alldayPA, and similar) typically run £150–£500/month for basic call-answering and £600–£1,500/month once diary management is included. An AI receptionist wins on cost for anything over roughly 80 calls a month, and wins outright on 24/7 coverage and instant diary writeback. A human service wins on genuinely complex, unscripted conversations — and we say so honestly on the full comparison page.
Is there a cheaper way to start?
Yes — missed-call text-back alone. Build fee £800–£1,500, monthly cost £70–£150. It doesn't answer the phone but it recovers most of the lost revenue from calls you miss, and it is the fastest possible payback. Many trades start here and upgrade to a full AI receptionist in month 3 once they trust the pattern.
Frequently asked questions
Are there hidden costs I should ask about?
Three to ask about: (1) markup on third-party usage — we bill at cost, some vendors add 30–50%; (2) prompt-change fees — clarify whether small tweaks are in the retainer or billed hourly; (3) exit / data export — you should own your call logs and be able to leave with them.
How quickly does an AI receptionist pay for itself?
For most UK small businesses answering more than 30 calls a day, payback is under 8 weeks — driven mostly by bookings captured that would otherwise have gone to a competitor.
Do I need to change my phone number?
No. You can port your existing number or forward calls to the AI number. Most clients start on forwarding and port once they're confident.
What about VAT?
All figures above are ex-VAT. Standard 20% UK VAT applies to FlowGenix invoices; third-party platform costs (Twilio, ElevenLabs) typically follow their own VAT rules.
Is there a fair-use cap on the retainer?
Retainers assume a normal call profile for your business size. If call volume triples we discuss — usually the extra revenue funds the extra usage cost several times over.
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