How much does VoIP cost per user?

Between $15 and $119 a seat a month across eight vendors whose pages were read on 19 August 2026, and none of those figures is the monthly cost. Ours are $29, $49 or $79 a seat. What the seat number leaves out is numbers, calling past the allowance, hardware, tax, seat minimums and a federal line item.

This article is about the gap between those two things. It is not the total-cost argument, which is worked through in the true cost of a business phone system; it is the narrower question of what a per-user price is and is not telling you.

The eight vendors in this site's own competitive analysis publish lowest tiers from $15 to $119 a seat a month. Two of those figures carry a caveat that travels with them: 8x8's came from a search snippet after the site returned an error, and RingCentral's is rendered by script rather than written into the page, so neither was read off a page the way the other six were. Both are drawn hollow in the figure below for exactly that reason, and none of these numbers should be treated as today's price without checking. They were read on 19 August 2026.

An eightfold spread is not a quality ranking. The cheap end is a phone system sold to everybody in a company. The dear end is contact-centre software sold to one department that answers calls all day, with workforce scheduling and quality management attached. Comparing the two on price per seat is comparing a van to a forklift on price per wheel.

Three of the eight publish a seat minimum: three seats, twenty-five seats and fifty seats. That is the single most important thing on the chart and it never appears in a "from $X a month" headline.

Work it through. A vendor publishing $119 a seat with a fifty-seat floor is not a $119 product for a business of eight people. It is a $5,950 a month product, and there is no version of it that costs less. A vendor at $85 with a twenty-five seat floor is a $2,125 a month product. For a business of five to twenty people, the seat minimum decides the shortlist before the seat price gets a vote.

Ask the question in that form: not "what is your price per seat", but "what is the smallest monthly invoice you can send me".

There is one charge on a US phone bill that has nothing to do with your supplier's pricing and appears on nearly all of them.

Providers of interstate telecommunications contribute to the federal universal service fund, and the rule that governs how they pass that on, 47 CFR 54.712, contributor recovery of universal service costs from end users, sets the ceiling: if a contributor recovers its contribution through a line item on a customer's bill, that line item may not exceed the interstate telecommunications portion of that customer's bill times the relevant contribution factor.

Three things follow that are worth knowing before you compare two quotes.

• It is a percentage, not a fixed fee. It moves with your bill.
• The contribution factor is set quarterly by the FCC, so the same service can carry a different figure three months later without anything about your account changing.
• It applies to the interstate portion, which means two suppliers with identical headline prices can produce different line items depending on how they classify your traffic.

None of that is a reason to pick one supplier over another. It is a reason to ask each of them whether their quoted price is before or after it, because a quote "plus taxes and fees" and a quote "including all taxes and fees" are not the same quote and are routinely compared as though they were.

• Numbers. Usually per number per month. Count every one: the published line, each direct line, the fax line in the back room, the number on the van.
• Calling past the allowance. Almost every plan includes an allowance of minutes and charges a published rate beyond it. Ours is 3.0¢, 2.5¢ or 2.0¢ a minute depending on the plan. A rate you can look up is worth more than a large allowance you cannot verify.
• Add-ons, and the unit each is billed in. Recording, storage past the retention window, integrations, analytics. Per seat, per number or per company, and the difference across twelve people is substantial.
• Hardware. Desk phones and headsets are one-time and they are frequently the largest single line in a first-year quote.
• Setup, onboarding and number transfer, which are also one-time and are the lines most often left blank.

The full checklist, in a form you can hand to a supplier, is what a VoIP quote should itemize. The charges that land in month eighteen rather than month one, from the renewal rate to what leaving early costs, are set out in hidden costs in a VoIP contract.

Five steps, in this order:

1. Count seats, not people. A seat is a licence. Two part-timers covering one desk on different days may be one licence or two depending on the supplier's rules, and the bookkeeper who never answers the phone is neither. On a team of twelve the honest count is often nine.
2. Check that count against the seat minimum. If it is below, the minimum is your price.
3. Multiply, then add the numbers, at the per-number rate, for every number you actually publish.
4. Add an estimate for calling past the allowance, using the published rate and last quarter's real minutes if you have them. If you do not, ask your current supplier for a call detail summary before you sign anything new.
5. Add tax and the federal line item, and write them on their own row rather than folding them into the rate.

Do the one-time costs on a separate line entirely. Averaging a set of handsets over thirty-six months produces a tidy monthly figure and hides the fact that the money leaves in month one.

$29, $49 or $79 per seat per month, billed in US dollars, with an allowance of minutes on every plan and a published rate of 3.0¢, 2.5¢ or 2.0¢ a minute past it. There is no minimum number of seats, so one seat is a real thing you can buy. Every plan also carries a monthly spend ceiling, which is the part of a bill nobody quotes for and which is explained in the surprise phone bill.

The full table of allowances, rates and ceilings is on the pricing page, and the figure above is generated from the same file that page reads, so the two cannot disagree.

We do not publish a comparison that claims to be today's price at any other vendor, because those pages change without anything breaking and the dates on ours are the only honest part of the exercise. We have no office anywhere. Numbers are provisioned by hand rather than bought from a page, and there is no self-serve signup.

More on running phones as a service is on the cloud telephony topic page.