VoIP vs Traditional Landline: Which Is Best for UK Businesses?

VoIP typically costs £8 to £25 per user per month including unlimited UK calls, compared to £15 to £30 per line plus per-minute charges for landlines. Most businesses save 40 to 60% on telephony costs after switching. For a 20-user office, that equates to savings of £200 to £400 per month, with additional features like call recording and mobile apps included at no extra cost.

The UK PSTN switch-off is scheduled for completion by January 2027 (Openreach), after which traditional analogue and ISDN lines will cease to function. Businesses still on landlines will lose their phone service unless they migrate to VoIP or another IP-based solution. Migrating now on your own terms avoids the cost pressure and limited provider availability that last-minute transitions create.

On a stable internet connection, VoIP call quality matches or exceeds traditional landlines, supporting HD voice codecs that landlines do not. UK broadband average download speed is 69.4 Mbps (Ofcom Connected Nations 2024), which comfortably supports multiple simultaneous VoIP calls. Businesses with unreliable broadband should consider a leased line for guaranteed call quality.

VoIP includes call recording, auto-attendant, mobile softphone apps, CRM integration, call analytics, and seamless multi-site operation — all features that landlines either cannot provide or charge significant premiums for. Remote workers can use the same business number from any location, which landlines cannot support without expensive call forwarding arrangements.