Answering service cost: how pricing really works

Comparing answering services is unusually difficult, and not by accident. One quotes per minute, another per call, a third bundles a monthly plan with an overage rate. All three sound reasonable. Any of them could be the cheapest or the most expensive for your business, depending on details that rarely appear on the pricing page.

Here is how the models actually work, and what to ask.

The four pricing models

Per minute. You pay for connected talk time. Straightforward, and it rewards short efficient calls — provided the billing increment is honest (see below).

Per call. A flat fee for each answered call regardless of length. Predictable, and good when your calls are consistently long. It gets expensive when a lot of your calls are twenty-second wrong numbers, because each one costs the same as a real enquiry.

Monthly plan with included volume. A bundle — so many minutes or calls a month — with an overage rate beyond it. The overage rate is the number that matters, and it is usually the one printed smallest.

Per-minute with no minimum. Common with AI services. Cost tracks usage exactly, so a quiet month is genuinely cheap and a busy one costs more.

None is inherently better. Which is cheapest depends entirely on the shape of your call volume.

The four things that decide your bill

Billing increments

This is the single biggest hidden multiplier. A service billing in one-minute increments charges a full minute for a fifteen-second call. If a third of your calls are short — wrong numbers, hang-ups, quick questions — you can pay two to three times the effective rate you thought you agreed.

Ask directly: what is the smallest unit you bill, and do you round up? Per-second billing with no rounding is the honest end of this; one-minute rounding is not necessarily dishonest, but it must be in your comparison.

Monthly minimums

Human services staff your hours whether the phone rings or not, so a minimum is a reasonable thing for them to charge. It is also the thing most likely to make a service expensive for a small business.

Do the division. A minimum divided by the calls you actually receive gives you the real cost per call, and for light volume that number is often startling.

What counts as billable

Ask what you are charged for beyond conversations:

• Wrong numbers and hang-ups
• Spam and robocalls
• Time spent on hold or transferring
• Messages relayed to you by SMS or email
• Setup, script changes, out-of-hours surcharges

Every one of these is normal to charge for. The problem is only ever discovering it on the invoice.

Peak and after-hours loading

Some services charge more for nights, weekends and holidays — which is exactly when you most want cover. If your reason for buying is after-hours, price the after-hours rate, not the daytime one.

Working out your own numbers first

You cannot compare quotes without your own volume. It takes twenty minutes to get.

1. 1

   Pull a month of call data

   Most phone systems and mobile carriers export this. You want total calls, missed calls, and roughly when they arrive.

2. 2

   Estimate average call length

   If you do not have it, assume 60–120 seconds for routine enquiries. Booking calls run longer, information calls shorter.

3. 3

   Split the calls you actually want answered

   Not all of them. Wrong numbers and spam are volume you will be billed for but gain nothing from — worth knowing before you sign.

4. 4

   Price every option against those numbers

   Ask each provider for a single monthly figure at your volume, including minimums, increments and fees. Compare those figures, not the headline rates.

Where AI pricing differs

AI receptionists generally bill per minute with no minimum and no per-seat fee, which changes the shape of the decision rather than just the number:

• Light or unpredictable volume gets much cheaper, because you are not paying to have someone rostered for calls that never come.
• Very high volume is less dramatic a saving, since cost scales with usage in both models.
• Short calls stop being expensive, provided billing is per-second.

The honest limitation is the same one that applies everywhere in this market: cheap cover that gives wrong answers costs more than expensive cover that gives right ones. Price is the second question, after whether the service can actually handle your calls.

What we charge, for reference

We publish our pricing rather than quoting it, so you can use it as a comparison point.

Dial Milo bills per minute of answered call time, prorated by the second, with no subscription, no minimum, and no per-seat fee. On the standard engine that works out to roughly 5¢ per minute for a US number — a carrier component of about 1.6¢ and an AI component of about 3.5¢. Numbers are $3/month, or you can forward an existing one for nothing. Missed, blocked and spam calls are not billed at all.

The live figures, including per-country rates, are at /pricing.md and /rates.md — generated from the same system that produces the invoices, so they cannot drift from what you are actually charged.

Whether that is cheaper than a human service for you depends on your volume and how much of your call mix genuinely needs a person. We wrote that comparison up in Dial Milo vs a traditional answering service, and the after-hours case specifically in after-hours answering services.