How to choose a call answering service: key facts
- The best call answering service is the one that fits your hours, your callers and your volume. A service built for a busy plumber may not suit a law firm, and the other way round.
- Before you speak to any provider, write down which hours need covering, who calls you and roughly how many calls you get, using your phone system's call log if you can.
- Ask every provider the same questions, so you're comparing like with like: hours staffed, where receptionists are based, how they learn your business, how messages reach you and how calls are charged.
- Find out exactly what counts as a chargeable call or minute: wrong numbers, sales calls, hang-ups, the time spent writing up a message, and how time is rounded.
- A provider that takes messages with callers' details for you is normally a processor. UK GDPR Article 28 requires a written contract that, among other things, says it acts only on your documented instructions and deletes or returns the data when the service ends.
- Under Article 28 a processor can't bring in another processor (a sub-processor) without your written authorisation, so ask who else handles your callers' data.
- Check the minimum term, notice period and whether prices can change during the contract before you sign.
- Whatever a provider tells you, ring your own number as a pretend caller during any trial and read the message that arrives.
Is there a best call answering service?
Not in general. The best call answering service for you is the one whose hours, receptionists, message handling and pricing match the way your calls actually come in. A service that suits one business well can be a poor fit for another, so judge providers against your own needs rather than a league table.
Search for the best call answering service and you'll find plenty of rankings. They can be a starting point, but they can't know your business. Three things change the answer from one business to the next:
- When your calls come in. A firm that only needs cover over lunch and during meetings is choosing something quite different from a letting agent whose tenants ring at midnight.
- What callers need. Some businesses mainly need an accurate message. Others need appointments booked into a diary, calls put through to a named person, or genuinely urgent calls escalated to someone on call.
- How much care each call needs. A solicitor's new enquiry has to be handled with confidentiality in mind; a trade's quote request needs the right job details; a clinic needs anything clinical kept away from the receptionist entirely.
So rather than asking "which service is best?", ask "which service handles my calls well, at a price that makes sense for my volume, on terms I'm comfortable with?" The rest of this guide is a way to answer that. We don't rank or recommend any provider.
What should I work out before contacting any provider?
Write a one-page summary of your own calls: the hours you need covered, the main types of caller, what you want done with each type, what counts as urgent, and where messages should go. Providers can then quote and answer questions against your real situation instead of a generic one.
Ten minutes on this saves a lot of time later, and it stops you being sold a service shaped around someone else's business.
- The hours. List the times your phone currently goes unanswered or to voicemail: early mornings, lunch, meetings, site visits, evenings, weekends, bank holidays, holidays and sickness. That tells you whether you need overflow, out of hours, all calls or cover for set periods. The homepage explains each type of cover.
- The callers. Note the four or five kinds of call you get most: new enquiries, existing customers, suppliers, people chasing a job, sales calls. Our guides for solicitors, accountants and estate agents show how different this mix can look.
- What you want done with each. Take a message, put the call through, book an appointment, give out set information (opening hours, address, how to send documents), or politely turn it away.
- What's urgent. Decide which calls can't wait until you're free, and who should get them. If you need cover at night, our guide to out of hours call answering explains how to write an urgency rule.
- Where messages go. One person's email, a shared inbox, text, an app, or your CRM or practice software. Different call types may need to go to different people.
- What must never be said. Any advice, prices, promises or client information you don't want a receptionist to give out.
If you're still deciding whether to outsource at all, read virtual receptionist vs hiring a receptionist first.
How do I work out how many calls I get?
Look at the call log on your phone system, your phone provider's online account or itemised bill, or your mobile for two typical weeks, and count calls by day, time and length. If there's no log, keep a simple tally for a week. Pricing is based on volume, so this is the most useful number you can give a provider.
Most people guess their call volume, and most guesses are off. Because providers usually charge by the call or by the minute, a real figure makes quotes far easier to compare.
Where to find the numbers
- Your business phone system or its online dashboard, if you have one, may show incoming, answered and missed calls.
- Your phone provider's online account or itemised bill may list calls, though some only show outgoing calls.
- Your mobile's recent calls list, if your business number rings through to it.
- A paper tally by the phone for a week, if nothing else is available: tick each call and note the time and what it was about.
What to record
| Measure | Why it matters | Your figure |
|---|---|---|
| Incoming calls per week | The starting point for any quote | |
| Calls you missed or sent to voicemail | Shows how much an overflow service would actually handle | |
| Calls outside your opening hours | Decides whether you need evening, weekend or bank holiday cover | |
| Busiest days and times | Helps you ask how the provider copes with your peaks | |
| Typical call length | Matters if you're charged per minute | |
| Rough share of sales calls, wrong numbers and hang-ups | Tells you how much it matters whether these are charged | |
| Seasonal peaks | For example tax deadlines, summer lets, winter boiler breakdowns |
Pick ordinary weeks. A week with a bank holiday or a staff holiday can make the numbers look very different, so note anything unusual.
What should I ask about hours and who answers my calls?
Ask whether every hour you need is staffed by real receptionists, including evenings, weekends, bank holidays and Christmas; whether any of those hours cost extra; where the receptionists are based; and whether a small team will get to know your business or any of a large pool could answer.
Hours
- Which hours are covered by a person, and which (if any) go to voicemail or an automated message?
- Are evenings, weekends and bank holidays included, or charged differently?
- What happens on the days when demand is highest for the provider, such as Monday mornings or after a bank holiday? Ask how they plan staffing for peaks.
Where receptionists are based
Many UK businesses want callers to hear someone based in the UK who knows local place names and how things work here. If that matters to you, ask directly, and ask whether it applies at all hours or only during the day. Ask too whether receptionists work from the provider's office or from home, and how calls and messages are kept secure in either case.
It's also a data protection question. UK GDPR Article 28 says a processor must act only on your documented instructions, and that includes transfers of personal data to another country. Ask where messages and any call recordings are stored and whether any of your callers' data leaves the UK.
Team size
Some providers assign a small team to each client; others route calls to whoever is free. A small team may get to know your business better; a large pool may cope better with sudden peaks. Neither is automatically better. Ask how they make sure a receptionist who has never taken one of your calls still handles it well.
How will the provider learn about my business?
A good provider starts with a written brief or onboarding call covering your greeting, services, staff, call types, urgent rules and things never to say, turns it into a script receptionists see on screen, and lets you update it quickly. Ask who writes the script, how long set-up takes and how fast a change goes live.
The receptionist answering your call won't know your business unless someone has told them. The quality of that briefing, and how easily you can keep it current, often matters more than anything on the provider's website.
Questions to ask
- The brief: do they send a questionnaire, hold a set-up call, or both? What do they need from you?
- The script: who writes it, you or them? Can you see and approve it before going live?
- Different callers: can the script branch for different call types, for example new enquiries, existing clients and suppliers?
- Updates: how do you change instructions (portal, app, email, phone), and how quickly does a change reach the receptionists? Try it during a trial: "Ali is off today, send his calls to Jess."
- Staff availability: can you mark people as in a meeting, on holiday or not taking calls, so callers get a sensible answer?
- Set information: can they give out things you approve, such as opening hours, directions or how to send documents, without straying into advice?
How should messages and call transfers work?
Messages should reach the right person within moments of the call ending, in a format they can act on without calling back to ask what it was about. If you want calls put through, ask how transfers work, how long a caller waits if you don't pick up, and what happens next.
Messages
- How are messages sent: email, text, app, online portal, or into the CRM, practice management or booking software you already use?
- Can different types of call go to different people or a shared inbox?
- What does a message contain? Ask for a sample. You want the caller's name, number, what it's about in a line, any deadline mentioned and how urgent it is.
- Is there a daily summary, and can you search past messages?
Transfers
- Can they put a call through to your mobile or a colleague, and announce who's calling first?
- If you don't pick up, how long does the caller wait, and do they go back to the receptionist for a message?
- Is a transferred call charged differently, or does the time you spend talking count towards your minutes?
Urgent calls
Ask how urgent calls are flagged, how many times they'll try to reach you or an on-call person, how far apart those attempts are, and what they do if nobody answers. Ask whether those attempts are logged so you can check afterwards.
What data protection terms should a call answering contract include?
A call answering service taking callers' details for you is normally your processor, so UK GDPR Article 28 requires a written contract. It must say, among other things, that the provider acts only on your documented instructions, keeps its staff bound by confidentiality, keeps data secure, uses sub-processors only with your authorisation, and deletes or returns the data when the service ends.
The ICO explains that when another organisation handles personal data on your behalf, it is normally a processor and you are the controller, and you need a written contract with the terms Article 28 sets out. Article 28 also says you should only use processors that give sufficient guarantees they'll protect the data properly. Choosing a provider is part of how you meet that.
Ask for the provider's data processing terms before you sign, and check they cover the points Article 28 requires, including that the provider:
- handles your callers' data only on your documented instructions, including any transfer of it outside the UK;
- makes sure everyone who handles the data is bound by confidentiality;
- takes appropriate security measures;
- doesn't use another processor (for example a software or telephony supplier that stores messages) without your written authorisation, and tells you about changes if you've given general authorisation;
- helps you respond when someone asks to see or delete their data;
- deletes or returns the data, at your choice, when the service ends;
- gives you the information you need to show the rules are being followed, and allows for audits.
Also ask practical questions: how long messages and any call recordings are kept, who at the provider can see them, and how you'd get your message history out if you left. If your profession has its own confidentiality rules, as solicitors and accountants do, check the provider's arrangements fit them too. This is general information, not legal advice.
What counts as a chargeable call, and what contract terms should I check?
Ask each provider exactly what they charge for: whether wrong numbers, sales calls, hang-ups and very short calls count, whether time spent writing up a message is billed, how minutes are rounded, and what happens above your allowance. Then check the minimum term, notice period, set-up fees and whether prices can rise mid-contract.
We don't publish prices because they vary and change. But two quotes with the same headline figure can cost very different amounts once you apply them to your own calls. These questions show where the differences are:
What gets charged
- Is it a monthly bundle, per call, per minute, or a mix?
- Do sales calls, wrong numbers, silent calls and hang-ups count? Is there a cut-off below which a call is free?
- If charged by time, does it include the time spent writing up the message after the call? How is time rounded?
- Are transfers, bookings and urgent escalations charged extra?
- What is the overage rate above your allowance, and do unused calls roll over?
- Are there set-up fees, number charges, or extras for evenings, weekends or bank holidays?
The contract
- Minimum term: monthly rolling, or a fixed period?
- Notice period to leave or change plan, and whether you can move down a plan as well as up.
- Price changes: can they raise prices during the term, and how much notice do they give?
- Seasonal use: can you increase cover for a busy period and reduce it afterwards?
- Leaving: how do you get your message history and your call divert back, and is there any exit charge?
Get the answers in writing, and work out a typical month using the figures you gathered from your call log. Our guide to virtual receptionist vs hiring a receptionist has a simple worksheet for adding up a year's cost.
How do I test a call answering service before committing?
Ask whether a trial is available and what it includes, then mystery-shop the service yourself: ring your own number as different kinds of caller at different times, including a busy time and outside office hours, and check how you were greeted, whether the script was followed and how accurate the message was.
A sales call tells you how a provider describes its service. A test call tells you what your callers will actually hear. If a trial is offered, ask how long it lasts, whether it uses your real script, and whether it rolls into a paid contract automatically.
A simple mystery-shop plan
- Write three or four test scenarios based on your real calls: a new enquiry, an existing customer chasing something, a caller asking for something the receptionist mustn't answer (advice, a price, another client's details), and an urgent call if you use escalation.
- Ask a friend or colleague to call if the provider might recognise your number or voice.
- Call at different times: mid-morning, lunchtime, late afternoon, and evening or weekend if you're paying for that cover.
- Listen for the basics: how quickly it was answered, whether your business name was used correctly, whether the receptionist sounded like they knew what you do.
- Check the boundaries: did they politely decline to give advice or information you'd ruled out?
- Read the messages: how fast did they arrive, were the name and number right, and could you act on them without calling back?
- Test a change: update an instruction and call again to see whether it was picked up.
Keep testing occasionally after you go live, especially after you change your script or before a busy season.
What's a simple checklist for choosing a call answering service?
Use the same checklist for every provider: hours staffed, where receptionists are based, how they learn your business, how messages and transfers work, the data protection contract, what counts as a chargeable call, minimum term and notice, and how the test calls went. Then watch for red flags such as vague answers on charges or no processor contract.
Print this table, or copy it into a spreadsheet, and fill in one column per provider you speak to.
| Question | What a clear answer looks like | Provider A | Provider B |
|---|---|---|---|
| Which of my hours are covered by a person? | Specific hours, including bank holidays if you need them, and any extra charge stated | ||
| Where are receptionists based, at all hours? | A direct answer, plus where messages and recordings are stored | ||
| How do you learn my business? | A written brief or set-up call, a script I can approve | ||
| How quickly can I change instructions? | A clear method and timescale I can try in a trial | ||
| How do messages reach us? | The channels my team already uses, with a sample message | ||
| Can you transfer calls and escalate urgent ones? | How many attempts, how far apart, what happens if nobody answers | ||
| Will you sign a UK GDPR Article 28 contract? | Yes, with terms I can read before signing, and sub-processors listed | ||
| What counts as a chargeable call or minute? | A written answer on spam, wrong numbers, wrap-up time and rounding | ||
| What would my typical month cost? | A quote based on my own call figures, including overage | ||
| Minimum term and notice period? | Stated plainly, with any price-change terms | ||
| Is there a trial? | What it includes and whether it rolls on automatically | ||
| How did my test calls go? | Correct greeting, script followed, accurate and fast messages |
Red flags
- Vague or changing answers about what counts as a chargeable call or minute.
- No written data processing terms, or reluctance to show them before you sign.
- Pressure to sign a long contract before you've seen the script or made any test calls.
- A receptionist on a test call who gives advice, quotes a price or shares information you'd ruled out.
- No clear way to update your instructions, or changes that take days to reach the people answering.
- Unclear answers about who answers out of hours, or where your callers' data is stored.
- Promises of guaranteed results, such as a set amount of new business.
We don't recommend or rank providers. If you'd like to skip some of the legwork, we can pass your details to one call answering provider from our partners. Use this checklist with them too.
Related guides
How to choose a call answering service: frequently asked questions
How do I choose a call answering service?
Start with your own needs: the hours you need covered, the kinds of caller you get, what you want done with each call and roughly how many calls you receive. Then ask each provider the same questions about hours, staff, briefing, messages, data protection, charges and contract terms, and make test calls before committing.
What is the best call answering service?
There isn't one best service for every business. The right choice depends on when your calls come in, what callers need and how many calls you get. Compare providers against your own needs rather than a general ranking. We don't rank or recommend providers.
What questions should I ask a call answering service?
Ask which hours are staffed, where receptionists are based, how they learn your business and how quickly you can change instructions, how messages and transfers work, whether they'll sign a UK GDPR Article 28 contract, what counts as a chargeable call or minute, and what the minimum term and notice period are.
How do I work out how many calls my business gets?
Check the call log on your phone system, your phone provider's online account or bill, or your mobile, for two typical weeks. If none is available, keep a tally by the phone for a week. Note missed calls, calls outside opening hours, busy times and typical call length.
Do wrong numbers and sales calls count towards my bill?
It depends on the provider. Some charge for every call answered, some don't charge for very short calls, sales calls or wrong numbers. Ask each provider to explain in writing, and ask whether time spent writing up a message is billed.
Does it matter if the receptionists are based in the UK?
For many businesses it does, because callers may expect local knowledge and a familiar accent. It also affects data protection, since a processor must act only on your documented instructions, including on transfers of data outside the UK. Ask where receptionists work and where messages are stored.
Do I need a contract for data protection?
Usually yes. A call answering service that takes callers' details for you is normally a processor, and UK GDPR Article 28 requires a written contract with specific terms, such as acting only on your instructions and deleting or returning data when the service ends. Ask to see it before you sign.
Can I try a call answering service before signing up?
Some providers offer trials, but what's included varies. Ask how long it lasts, whether it uses your real script and whether it becomes a paid contract automatically. Make your own test calls during the trial.
How do I mystery-shop a call answering service?
Ask a friend or colleague to ring your number as a few typical callers, at different times of day, including a caller asking for something the receptionist shouldn't answer. Then check the greeting, whether the script was followed and how quickly an accurate message arrived.
What are the warning signs of a poor fit?
Vague answers about charges, no written data processing terms, pressure to sign a long contract before testing, receptionists who give advice or information you've ruled out, slow or awkward ways to update instructions, and promises of guaranteed results.
What minimum term and notice period should I expect?
Terms vary between providers, from rolling monthly arrangements to fixed periods. Check the minimum term, the notice needed to leave or change plan, whether prices can rise during the contract and how you'd take your message history with you.
Sources
We checked the facts on this page against these sources on 11 November 2026: