What happens to your calls after hours?

After hours is when your customers are free

People ring when they finish work, which is usually when you close. The call at 19:40 is often someone who couldn’t ring earlier, and if nobody answers they book with whoever does. It is the same at lunchtime and on Saturday morning.

Before deciding anything, look at your own phone. For a week, check the call log each evening and note the missed calls and their times. Look for bunches around closing time, lunch and the weekend. If you find them, an after-hours service is worth thinking about. If they are spread thinly through the day, the problem is who watches the phone during opening hours.

How an after-hours service works

Every after-hours set-up has the same three parts.

The switch. Something has to send calls elsewhere once you close. On a mobile, Vodafone UK’s help page gives the standard codes: **21*number# diverts every call and ##21# switches it off again in the morning. Or leave the no-answer divert, **61*number#, on all the time, so any call you don’t pick up goes to the service, day or night. Many phone systems and providers can also switch by the clock: ask yours.

Who answers. A team of people, or an AI. Check whether evenings and weekends cost extra. On the pages we read on 23 September 2026, ReceptionHQ says 24/7 cover is included with no after-hours surcharge, and AnswerConnect says all its plans include 24/7 live answering. Ask, too, where night calls are picked up: ReceptionHQ, for example, says its UK team answers most calls during office hours, with overflow support from teams in Australia and the US. Published prices are compared in telephone answering service: human, virtual or AI?

What comes back to you. Either a message, by email or text, with the caller’s name, number and reason. Or a booking already in your diary. Ask how quickly: a message you only see the next morning is voicemail with extra steps.

What it should handle

• Bookings, changes and cancellations, if the service can see your diary. If it can’t, each one becomes a message and a call back tomorrow.
• Messages with name, number and reason, sent to you in writing.
• Routine questions: opening hours, address, parking, and prices you have given it.
• A clear rule for real urgency: who is on call, if anyone, and which calls go to them.

What it shouldn’t

• Triage. Nobody answering your phone at night should judge how serious a symptom is. Anything that sounds like an emergency goes to 999. For urgent medical problems when a practice is closed, the NHS points people in England to 111.
• Promises nobody will keep. ‘We’ll call you back tonight’ when nobody is working tonight.
• Estimates for things that need looking at. The noise from the engine, the cracked tooth, the leak: take the details, don’t guess the price.

Turning the evening call into a booking

A message is a job for tomorrow. A booking is finished. The difference is whether whoever answers can see the diary. Here is a sample call to a fictional physiotherapy clinic, answered by a voice assistant at 19:48:

Caller: Hi, I wanted to book in, my back’s been hurting since Monday.

Assistant: Hi, this is the voice assistant for Fisio Centro, an artificial-intelligence system. This call is recorded so we can book you in correctly. I can find you a time with a physio, and if you’d rather speak to a person, say ‘person’. Would tomorrow morning or afternoon suit you better?

Caller: Afternoon, after five.

Assistant: I have 17:30 with Andrés or 18:45 with Lucía. Which shall I book?

Caller: Half five.

Assistant: Booked ✓ Tomorrow at 17:30 with Andrés. I’ll send the confirmation by WhatsApp to this number, with the address. If you can’t make it, just reply to that message.

With a message-only service, the same call ends with ‘someone will call you tomorrow’, and the booking depends on the patient picking up then. If that is your set-up, make the morning routine fixed: read the overnight messages before the first appointment and ring back before 10:00.

Human or AI after hours

A person is better with the distressed caller and the call nobody planned for. An AI is better when most evening calls are simply people who want an appointment, and when enough of them come in that per-minute pricing adds up. Either way, the caller should know who they are talking to. For an AI that is not optional: under EU law (AI Act, art. 50) it must say it is an artificial intelligence.

And be honest about volume. With fewer than ten or fifteen calls a day, a voice assistant doesn’t pay. A good out-of-hours greeting and a WhatsApp you answer first thing are enough.

Where to start

Tonight, record an out-of-hours greeting. For example, for a fictional garage:

Hi, you’ve reached Taller Sierra. We’re closed now and open again at 8:00. To book your car in, send us a WhatsApp on this number with the car and the day that suits you, and we’ll confirm first thing.

Set the WhatsApp Business away message to say the same, tied to your opening hours. Then count after-hours calls for a week.

If they are many, and mostly bookings, that is where Conserjía’s voice assistant fits: it answers on a conditional divert from your existing number, books into your diary and hands urgent calls to a person. The voice assistant page explains when it answers, what it says and what it doesn’t do.