The 2027 Landline Switch-Off Is Coming — and It Makes Missed Calls Cost Even More

On 31 January 2027 the UK's traditional copper phone network is switched off for good. For service businesses, it's a forced rethink of how calls are handled — and a chance to fix the missed-call problem properly.

On 31 January 2027, Openreach switches off the UK's traditional copper phone network (the PSTN) for good. Every analogue landline, ISDN line, and older broadband connection will stop working, moving to internet-based (VoIP) calling. For service businesses, it's not just an admin job — it's the moment to fix how every call gets answered.

If your business still runs on a traditional landline, this affects you directly. Here's the plain-English version.

What is the PSTN switch-off?

PSTN stands for the Public Switched Telephone Network — the copper-wire system that has carried UK phone calls for over a century. It's being retired. From 31 January 2027, all PSTN-based services stop working and everything moves to digital, internet-based calling (VoIP — Voice over IP).

This isn't a distant rumour. The migration has been rolling out exchange by exchange since 2023, with a "stop-sell" already in force across much of the country — meaning in many areas you can no longer order or modify a traditional copper line at all. Many businesses are being moved well before the final 2027 date.

What gets affected?

• Traditional landlines — analogue business phone lines
• ISDN systems — the digital lines many older office phone systems still use
• ADSL and FTTC broadband — older internet connections
• Anything plugged into a phone line — alarm systems, card machines, door entry systems

If your customers reach you on a number tied to a copper line, that number has to move to a digital system before your exchange is switched off.

Why does this make missed calls cost more?

Here's the part most "switch-off" articles miss. Moving to VoIP isn't just a like-for-like swap — it's a decision point. You're already changing how calls reach you. The question is whether you change it into something that just rings, or something that actually answers.

Because the cost of a missed call is brutal, and it isn't going down:

• 47% of calls to UK small businesses already go unanswered during working hours.
• 85% of callers who don't get an answer never call back — they ring the next business on the list.
• The average missed call to a service business is worth £250–£800 in lost job value.

If you're going to rebuild your phone setup for 2027 anyway, rebuilding it as a system that captures every call — instead of one that simply forwards to a voicemail nobody checks — is the obvious move.

What should service businesses do?

1. Don't wait for the deadline. Exchanges are migrating now. Check whether your area is already on stop-sell.
2. Move your number to a digital (VoIP) system so it keeps working after the switch-off.
3. Add an AI front desk while you're at it. Since your calls are routing through a digital system anyway, layer an AI voice agent on top so every call is answered 24/7 — qualified, and booked into your calendar — even when you're on a job or it's 9pm on a Sunday.

The bottom line

The 2027 switch-off is being framed as a chore. Treat it as an upgrade. You're changing your phone setup regardless — so change it into one that never misses a call again.

That's what Rex, our AI Front Desk, does: answers every call in natural conversation, texts back any caller it can't reach, and books the job straight into your diary. It runs on the same digital calling the switch-off is forcing everyone onto — so it's future-proof by design.

Want to know what missed calls are costing you today, before the switch-off even lands? Get a free Visibility Report and we'll show you the gap in 24 hours.

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