For most small businesses, the average cost of installing a VoIP phone system typically ranges from £15 to £30 per user, per month for hosted services, plus an initial outlay that can run from a few hundred pounds to several thousand, depending on the size and complexity of the deployment. The monthly figure usually covers licences, core calling features and ongoing support, while the upfront costs are driven by handsets, network upgrades, any required cabling, and professional installation. A very small office with five to ten users might spend £500–£2,000 on setup, whereas a growing organisation with 20–50 users could see initial costs in the region of £2,000–£8,000, especially if they require advanced features, multiple sites or extensive cabling work.
These ranges are only a guide, because VoIP systems are highly configurable. The final price is influenced by the number of users, whether you choose desk phones, softphones or a mix of both, and the level of resilience and call quality you need. Additional options such as call recording, call reporting, contact centre functionality, integration with CRM platforms and enhanced security can all add to the overall cost. Installation is also affected by the state of your existing network, including broadband capacity, internal wiring and WiFi coverage. A structured assessment of your current infrastructure and call requirements is therefore essential to produce an accurate quotation and ensure that the system you install is both cost‑effective and scalable.
The core elements that shape VoIP installation cost are user count, handset choice and network readiness. More users mean more licences and devices, but the cost per user often falls as you scale. Opting for softphones on existing computers or mobiles can significantly reduce handset expenditure, while premium IP desk phones and cordless handsets increase upfront spend but may improve usability and call handling.
Network preparation is another major factor. If your current broadband is insufficient for voice traffic, an upgrade to a higher‑bandwidth or dedicated connection may be required. Similarly, older or poorly planned cabling and WiFi may need remediation to guarantee call quality and reliability, adding to installation labour and materials.
Finally, consider ongoing costs as part of the overall investment. Hosted VoIP typically includes maintenance, software updates and remote support within the monthly fee, whereas on‑premise systems may involve separate support contracts, hardware maintenance and periodic upgrades.
