The 60-second answer
A bundled PBX is not free, it is unpriced. Its cost is folded into a per-seat line rate, which removes your ability to compare it, negotiate it, or decline it. Unbundling — commodity transport plus a flat-band platform — usually costs less and always costs less opaquely.
The offer, and what it conceals
The pitch is familiar to any Canadian business that has renewed a phone contract: take our lines and the phone system comes at no charge. Sometimes the handsets come too. It sounds like a saving because one of the two things has a price of zero attached to it.
It is not a saving. It is a bundle, and inside a bundle the individual prices stop existing. You are paying a blended per-seat rate that covers transport, call control and often hardware, and no part of that rate is attributable to any part of the service. The phone system's price is not zero. It is unknown.
Free means you cannot see the price. It does not mean there isn't one.
This matters because everything you might want to do later depends on knowing prices. You cannot compare a component whose cost you do not know. You cannot negotiate it at renewal. You cannot decline it and keep the rest. And you cannot walk away from one supplier's phone system without also walking away from your lines, which is the whole point of the arrangement from the seller's side.
Where the cost actually sits
Two identical businesses, twenty-two extensions each, both with the same call volume:
| Bundled "free PBX" | Unbundled | |
|---|---|---|
| Line / seat charge | 22 × $32 = $704/mo | Commodity SIP trunk, ~$120/mo |
| Phone system | "Free" | $219/mo flat (25-extension band) |
| Handsets | Included, carrier-owned | Owned outright, Class 8 [5] |
| Monthly before HST | $704 | $339 |
| Cost of the 23rd extension | +$32/mo, forever | $0 until 25 |
| Can you price the PBX? | No | Yes — $219 |
| Can you change one side only? | No | Yes |
Rates vary and your own numbers will differ; the shape does not. GST/HST applies identically to both columns [4], so tax does not alter the comparison. The structural difference is the last two rows, and they outlast any particular price.
The four costs that never appear on the invoice
1. Growth is charged twice
In a per-seat bundle, every new hire adds the full blended rate — transport and call control together — even though the platform's actual marginal cost of one more extension is nil. Under a flat band, extensions 11 through 25 cost nothing additional. Hiring is the normal condition of a growing business, and the bundle taxes it.
2. Handsets you do not own
Carrier-provided handsets are frequently locked to that carrier's platform, and are returned at the end of the contract. You spent three years paying for them without acquiring them, and at renewal the cost of leaving includes replacing every desk phone in the building. Handsets you buy outright are yours, appear as Class 8 depreciable property [5], and follow you to whichever platform you choose next.
3. Configuration you do not hold
Bundled systems usually mean the carrier holds the administrative access, and every change is a ticket. When you leave, the call flows do not leave with you — they are rebuilt from scratch. Federal baseline controls point at administrative access and inventory as things an organization should actually control [6]; an arrangement where you cannot see your own configuration sits awkwardly against that.
4. The renewal you enter blind
This is the largest cost and the hardest to quantify. Three years on, the carrier proposes a renewal. You have no idea what the phone system portion is worth, no comparable quote, no ability to move one side without the other, and handsets that stop working if you leave. That is not a negotiation. Some conditions of service and rate treatment are governed under the Telecommunications Act [2], but the general framework does not oblige anyone to itemise a bundle for you.
Ask the one question that reveals the price
Call your carrier and ask for a quote on the same lines and the same volume, with no phone-system features included at all — transport only. Then subtract.
Three things can happen. They quote it, and the difference is what the free PBX costs. They quote it at nearly the same price, which tells you the bundle's value is mostly rhetorical. Or they decline to quote transport separately, which tells you the most of all.
Note the framing, too. Deceptive-marketing provisions under the Competition Act direct attention to the general impression a representation creates, not only its literal accuracy [1]. "Free phone system" is literally true — there is no line item — while the impression created is that call control costs you nothing. Those are not the same claim, and you are entitled to ask which one is being made.
When the bundle is genuinely the right buy
There are cases, and pretending otherwise would be its own kind of misleading impression.
Below roughly six extensions, the arithmetic often favours the bundle outright. Six seats at $32 is $192, against $99 for the flat band plus a trunk, and the gap is narrow enough that the administrative simplicity of one supplier and one invoice is worth real money. A very small office with no growth plans and no interest in ever changing anything is being sold something reasonable.
The bundle also wins where the carrier is the only viable transport option at the address — some rural and industrial sites genuinely have one choice — because separability has no value if there is nothing to separate to. And it wins for organisations with no internal capacity to hold administrative credentials or make decisions about call flows, for whom "the carrier handles it" is an accurate description of what they want rather than a concession.
What changes the answer is scale and intent. Past about ten extensions, or the moment you expect to hire, or the first time you want to change something quickly, the unpriced component starts costing more than the simplicity is worth.
Why unbundling is now practical
It was not always. When the phone system and the lines were physically the same thing, bundling reflected reality. Standard SIP signalling ended that [3]: call control is software that talks to a trunk over an open protocol, and a trunk is a commodity. Any conforming platform connects to any conforming carrier. The bundle persists as a commercial preference, not a technical necessity.
The practical consequence is that unbundling requires nothing dramatic. You keep the carrier, the numbers and the lines. Only the platform that answers, routes and records changes. There is no port, and the fallback is a single delivery setting.
What flat-band pricing looks like
- Up to 10 extensions — $99/month ($9.90 per extension at the ceiling)
- Up to 25 extensions — $219/month ($8.76)
- Up to 50 extensions — $399/month ($7.98)
- Up to 100 extensions — $699/month ($6.99)
All figures CAD, plus HST. Setup is $350 at the entry band ($250 with a 12-month commitment), then $750, $1,200 and $1,900. Included: an extension per person, Canadian-hosted voicemail with voicemail-to-email, auto-attendant design, business-hours and after-hours routing, integration with your existing trunk or analogue lines, provisioning of handsets you already own, and roughly 30 to 60 minutes of admin changes per month. Not included: numbers, calling minutes, SMS. Those are transport — buy them wherever they are cheapest, which is the point.
Bottom line
A free carrier PBX is a priced product with the price hidden, and the hiding is the product feature being sold to the carrier's own sales team. Ask for a transport-only quote and subtract. If they will not give you one, you have learned what you needed to know. Call control and lines are separable in 2026 [3]; keeping them separable is what preserves your leverage at every renewal after this one.