What a Calling Plan actually is
A Microsoft Teams Calling Plan is Microsoft acting as your phone company: you buy a per-user plan inside your 365 tenancy, Microsoft supplies the numbers and the minutes, and calls flow through Teams with nothing else to set up. That simplicity is genuine — no telecoms provider, no extra contract, live in an afternoon. The trade-offs are equally genuine: per-user pricing is among the highest of the three routes, UK number porting into Microsoft is workable but less flexible than with a carrier, bundled minutes have caps that busy phone-heavy businesses hit, and support for calling issues means Microsoft support. For a small, light-calling office already deep in Microsoft licensing, a plan can be perfectly rational. For most UK SMEs making real call volumes, the arithmetic favours a carrier route.
The honest comparison
Three ways to give Teams a dial tone: Calling Plans (Microsoft as carrier — simplest, priciest per user), Operator Connect (a carrier like us plugged natively into your Teams admin centre — carrier pricing with almost Calling-Plan simplicity), and Direct Routing (maximum flexibility and lowest per-minute economics, worth it at scale or with complex routing needs). Our plain-spoken take: Operator Connect has made Calling Plans hard to justify for most UK businesses — same in-Teams experience, better rates, UK support that answers, and easier porting. The full decision tree lives in our comparison, and we'll tell you straight if your usage profile is the exception where Microsoft's plan genuinely fits.
Teams Phone resources: Teams Phone (pillar) · Operator Connect · Direct Routing · Calling Plans · OC vs DR compared · Teams Phone cost
Frequently asked questions
How much do Microsoft Teams Calling Plans cost in the UK?
Microsoft prices per user per month on top of your Teams Phone licence, with domestic and international variants. Exact rates change; the constant is that carrier routes like Operator Connect usually come in lower for equivalent usage. We'll price your actual profile side by side.
Can we keep our numbers on a Calling Plan?
Yes — numbers port into Microsoft. The process is more rigid than carrier porting, which matters if you have complex multi-line estates; we handle porting on all three routes.
Can we mix routes?
Yes — some businesses run Calling Plans for a satellite team and Operator Connect for the main estate. Teams supports coexistence; the admin just needs doing properly.