Call Answering Service for Small Business: What It Costs

TL;DR

A call answering service for a small business typically costs £65–£300 a month in the UK, depending on call volume, coverage hours, and whether it's a human or an AI service. Per-minute rates run roughly 30p–£1.85, per-call rates 60p–£2.50, and monthly bundles £25–£400+. The number on the pricing page is rarely the number on your invoice — setup fees, after-hours surcharges, and unused bundle minutes routinely push the real cost 20–50% higher. Here's the honest maths, including what an AI answering agent costs instead.

Why nobody gives you a straight number

Search "how much does a call answering service cost" and you'll get a dozen answers, all slightly different, all technically true. That's because the price genuinely depends on four things that vary by business: how many calls you get, how long each one takes, what hours you need covered, and what the service does once it answers — take a message, or actually book the job.

Providers don't hide this on purpose. But most pricing pages lead with the cheapest possible plan, which rarely matches what a real small business ends up paying once you add the hours and features you actually need. We built this guide to give you the maths instead of the marketing.

The three ways you actually get charged

Strip away the branding and every answering service — human or AI — bills you one of three ways.

Per-minute

You pay for time spent on the phone, typically 30p to £1.85 a minute. A quick "are you open Saturdays?" costs pennies; a ten-minute call talking someone through a quote costs considerably more. This suits businesses with short, simple calls and punishes anyone whose customers like to chat.

Per-call (flat rate)

You pay a fixed amount per answered call, roughly 60p to £2.50, regardless of how long it runs. Predictable, but you're effectively subsidising the short calls to cover the long ones — fine if your call length is fairly consistent, less fine if it isn't.

Monthly bundle

You pay a set fee — commonly £25 to £400+ a month — for an included number of calls or minutes, with overage charged separately once you go over. This is the most common structure for small businesses because it's predictable, right up until the month you don't use it fully.

That last point matters more than it sounds. Say you're on a 100-call bundle at £1.50 a call, so £150 a month. Use all 100 and that's a fair price. Use 40 because it was a quiet month, and your real cost per handled call has jumped to £3.75 — more than double the advertised rate. Bundles reward consistent, predictable volume and quietly punish anyone whose calls fluctuate, which describes most small businesses most of the time.

What you'll actually pay: realistic UK price bands

Putting real UK figures against real coverage levels, here's roughly where most small businesses land:

| Tier | Typical monthly cost | What you get | |---|---|---| | Low-cost | £65–£150 | Business-hours message-taking, limited calls included | | Standard | £150–£300 | More calls, appointment booking, some after-hours cover | | Premium / 24-7 | £300–£500+ | Full round-the-clock cover, higher call volumes, dedicated scripting | | AI answering agent | £25–£200 | Usage-based; scales with actual call volume, day or night |

Two things worth noticing. First, "premium" mostly buys hours, not intelligence — you're paying for someone to be reachable at 2am, not for a smarter conversation. Second, the AI band overlaps the bottom two human bands almost entirely, because there's no shift to staff and no idle receptionist to pay for between calls.

The extras that turn £85 into £250

The quoted monthly fee is almost never the final bill. Watch for:

• Setup fees — typically £20–£100 to get your script and account live.
• After-hours surcharges — £25–£75 a month as an add-on, or 10–50p extra per call outside business hours.
• Custom scripting charges — anything beyond a generic greeting can carry its own fee.
• Minimum contract periods — commonly one to twelve months, with reactivation or early-exit fees if you leave before it's up.
• Bundle waste — as above, the gap between what you're paying for and what you actually use.

None of these are scams. They're genuine costs of running a service with real people in it. But add two or three together and an £85-a-month headline price becomes a £200–£250 real one — worth knowing before you sign, not after your first invoice.

Is it cheaper than just hiring a receptionist?

Almost always, at least until your call volume is genuinely high. The median UK receptionist salary is £18,152 a year according to ONS data, though most live job listings sit closer to £24,000–£26,000. Add employer's National Insurance and workplace pension contributions, which typically add 15–20% on top of salary before you've paid for a desk, a phone line, or a single day of holiday or sick cover.

A standard answering service plan at £150 a month works out to £1,800 a year. Even a premium 24/7 plan at £400 a month is £4,800 a year — a fraction of one part-time employee's real cost, and it never calls in sick, takes a lunch break, or leaves to work somewhere else.

That doesn't make hiring the wrong choice for every business. A dedicated in-house person brings context an outsourced script can't match. But if the honest reason you're avoiding a receptionist role is cost, the maths above is worth sitting with before you decide an answering service is "too expensive" — it's very rarely the more expensive option.

Where AI changes the sum

Here's the bit most of the comparison articles skip, because most of them are written by human answering services comparing themselves to each other.

An AI voice agent is usually priced on usage — calls answered, minutes talked — rather than a person's shift. That means there's no idle-time cost to cover between calls, no per-operator overhead, and no reason a 2am call should cost more to staff than a 2pm one. In practice that puts a well set up AI answering agent in the £25–£200 a month range for most small businesses, undercutting the equivalent human plan while adding genuine 24/7 cover as standard, not an add-on you pay extra for.

The honest caveat: cheap isn't automatically good. A bargain-basement AI bot that can only recite a script and take a message is worth exactly what a bargain-basement human answering service is worth — not much. The ones worth paying for actually understand the caller, answer real questions, and book the appointment straight into your calendar rather than leaving you a note to action tomorrow. That's the difference between an answering service and something that finishes the job.

How to work out what it'll actually cost you

Skip the calculator on the vendor's website for a minute and do this instead:

1. Pull your real call volume. Most phone systems and mobiles log this — check the last two weeks, not a guess.
2. Decide what a good outcome looks like. A message you'll action later, or a booked appointment? That decides whether you need basic answering or a service that can genuinely handle the call.
3. Multiply your average call count by the provider's per-call or per-minute rate, not the headline monthly figure — that's your real usage cost.
4. Add coverage. If you need evenings, weekends, or full 24/7, add the after-hours surcharge or move to the tier that includes it.
5. Compare that total to a fixed bundle at the same volume. Whichever is genuinely lower — and covers what you actually need — is your answer.

Do this with real numbers and the "cheapest" option on paper is often not the cheapest option once your actual call pattern is applied to it.

The bottom line

A call answering service for a small business realistically costs £65–£300 a month for most owner-operated businesses, £300–£500+ for full 24/7 human cover, and £25–£200 for a usage-priced AI agent doing the same job. The headline number rarely survives contact with setup fees, after-hours surcharges, and unused bundle minutes — so run your real call volume through the maths above before you commit to anything.

If you want to see what an AI voice agent would actually cost for your call volume — with no setup fee and no minimum contract — take a look at our voice agents, or get in touch and we'll work the numbers with you. And once your calls are covered, it's worth checking what happens after the call ends too: automating the admin that follows a booking is where a lot of that saved receptionist salary quietly pays for itself twice.