What UK call answering services really cost

How per minute billing actually works

Most services round up to the next full minute, and many apply a minimum billable duration of one or two minutes. A caller who rings, is answered, and hangs up after eleven seconds because they dialled the wrong number is frequently billed as a full minute or two.

That sounds petty until you look at the shape of a real business phone line, where a large share of calls are short. If a third of your calls are under thirty seconds and you are billed at two minutes each, you are paying roughly four times the time you used.

Ask for the rounding increment and the minimum billable call in writing. A 39p rate with two minute minimums is more expensive than a 55p rate billed by the second.

Allowances, overage and the busy month problem

Bundled plans include a number of calls or minutes, then charge overage at a higher rate than the bundled equivalent. The economics are designed around you underusing the bundle in quiet months and overpaying in busy ones.

This matters most for seasonal businesses. A heating engineer in the first cold week of November, an accountant in late January, a gym in the first three weeks of the year: all of them hit overage exactly when volume spikes, and the bill arrives a month later.

What you are paying for beyond answering

Message taking, call transfer, diary booking, order taking and out of hours cover are usually priced separately or as plan tiers. Out of hours is the one worth scrutinising, because a service that charges a premium for evenings and weekends is charging most for the hours that generate your least contested enquiries.

Some services also charge per number, which matters if you run more than one trading name or want a separate line for existing customers.

The questions worth asking before signing

Contract length is the first one. Twelve months is standard and negotiable more often than suppliers admit. Ask what happens if service quality drops, and whether there is a break clause.

Then ask how calls are answered when several arrive at once. Human services queue by necessity, because a person can hold one conversation at a time. Ask what the average answer time is in your busiest hour, not your average hour.

• What is the rounding increment and the minimum billable call?
• What is the overage rate, and when does the allowance reset?
• Is there a setup fee, and what does onboarding include?
• What is the notice period, and is there a break clause?
• What happens when five calls arrive at the same moment?