Microsoft Teams Phone Cost for Small Business 2026

The three-piece stack and why it confuses buyers

Teams Phone is not a standalone product. It is an add-on that requires an underlying Microsoft 365 Business or Enterprise subscription, plus a PSTN connectivity option, plus optional hardware. Each piece has its own price page and the totals are rarely shown together. The Microsoft Teams Phone buy page shows the add-on price; the M365 base and PSTN plan prices are on separate pages.

Piece one: Microsoft 365 base. Most SMBs choose Business Basic ($6 per user per month) or Business Standard ($12.50). Business Basic gives you Teams chat and meetings but no installed Office desktop apps. Business Standard includes the full Office desktop stack. Larger SMBs may need Business Premium ($22) for Intune device management.

Piece two: the Teams Phone Standard add-on at $8 per user per month, or the Teams Phone with Calling Plan bundle (Teams Phone plus the Domestic Calling Plan) at $15. The add-on alone gives you the calling capability inside Teams but no PSTN connectivity, so by itself it cannot make external calls.

Piece three: PSTN connectivity. Three options. Microsoft Calling Plan (Domestic at $12, Domestic and International at $24). Operator Connect (third-party carrier via Microsoft-managed connectivity, prices vary). Direct Routing (your own SIP trunk, cheapest per-minute but most setup work).

When Teams Phone makes sense and when it does not

Teams Phone makes sense for SMBs already standardised on Microsoft 365 with Teams as the primary collaboration tool. Adding phone to the existing platform reduces the vendor count, keeps user identity centralised in Entra ID, and lets the single Teams client handle chat, meetings and calls. The admin console is the same one your IT person already uses. Single sign-on works out of the box.

It does not make sense for SMBs not already on Microsoft 365. The stacked cost competes with the more dedicated UCaaS providers without offering their phone-system specific features. RingCentral ($25.50 true cost) has deeper integration ecosystem and better small-business onboarding. Dialpad ($19.20 true cost) has included AI features Teams Phone charges Copilot pricing for.

For organisations migrating from a legacy PBX with a deep Microsoft 365 deployment, Teams Phone with Direct Routing is often the cheapest path: keep your existing SIP trunk, point it at Teams via a Session Border Controller, and the per-user incremental cost is just $8 on top of M365. This is the high-end Direct Routing case that beats the SMB UCaaS providers on raw per-user economics, though it requires real telecom expertise to deploy.

PSTN connectivity options compared

The PSTN-piece decision is the one most SMBs get wrong. Microsoft Calling Plan is the easiest (self-serve in the Teams admin console) but the most expensive per user. Direct Routing is the cheapest at scale but requires a third-party SBC and telecom expertise. Operator Connect is the middle ground: third-party carrier, but provisioned through Microsoft tooling.

For an SMB without dedicated IT, Microsoft Calling Plan is the practical default. For an SMB with an existing SIP-trunk relationship from a previous PBX, Direct Routing usually wins on raw economics. Operator Connect is the path for SMBs that want a partner carrier without the SBC management burden.

Team rollups (stacked total per user per month)

If you back out the Microsoft 365 cost you would pay anyway, the incremental cost of adding phone to an existing M365 deployment is just $20 per user per month (Teams Phone $8 + Calling Plan $12). On that incremental basis Teams Phone is cheaper than every other provider in our comparison. The challenge for cost benchmarks is that the M365 base is rarely separated out fairly in published comparisons.

The non-cost considerations

Teams Phone has a smaller third-party integration library than the dedicated UCaaS providers. Salesforce and HubSpot integrations exist but are less deep than RingCentral's. The mobile app is the standard Teams mobile app, which is generally fine but historically has had more sync glitches than dedicated UCaaS apps in our hands-on testing.

Call quality is excellent. Microsoft runs the Teams calling backbone on the same Azure backbone as the rest of Microsoft 365, with extensive global presence. Call setup times and audio quality match or exceed the dedicated UCaaS providers.

The Microsoft Teams admin centre handles phone-system configuration alongside meetings, chat and channels. For IT teams already managing Teams, this means no new admin interface to learn. For non-IT-led SMBs the admin centre is more complex than the RingCentral or Nextiva consoles and the setup wizard is less hand-holding.

Frequently asked questions