VoIP vs Landline UK 2026 | Why You Must Switch Before 2027
Quick Answer
👉 VoIP is the only long-term option for UK businesses.
With the UK’s PSTN switch-off now set for January 2027, traditional landlines will stop working entirely. VoIP (internet-based phone systems) offers:
✔ Lower costs (save 40-70%)
✔ Remote working capability
✔ Advanced features (call routing, analytics, apps)
✔ Future-proof communication
👉 Most UK businesses are already switching now to avoid disruption
👉 Compare VoIP phone system quotes and save up to 40% →
How do we work?
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Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: May 2026
Contents:
Why 2027 Is the Cut-Off Year
VoIP vs Landline: Full Comparison
Cost Breakdown: VoIP vs Landline (2026 UK Market)
Why the PSTN Switch-Off Means You Must Move to VoIP
What UK SMEs Need for a Smooth VoIP Migration
What VoIP Can Do That Landlines Never Could
What Happens if You Don’t Switch?
Key Takeaways
PSTN landlines will be switched off by January 2027
VoIP costs from £10-£25 per user/month
Businesses switching typically save 40-70%
VoIP supports remote, hybrid, and mobile teams
Migration usually takes 10-20 days
Delaying the switch risks complete loss of phone service
Why 2027 Is the Cut-Off Year The UK’s Public Switched Telephone Network (PSTN) is being fully retired, but has been delayed until January 2027 . the following services will no longer function:
Traditional landline phones
ISDN2 /ISDN30 Analogue phone lines
Copper-based alarms, lifts, PDQs, entry systems
BT Openreach and Ofcom have confirmed this timeline, impacting over 1.7 million UK businesses, so VoIP is now the required alternative.
VoIP vs Landline: Full Comparison
Feature VoIP Traditional Landline
Status
✅ Future-proof
Monthly Cost
£10-£25/user
£18-£35/line
Call Quality
HD digital
Standard
Remote Working
Yes
No
Setup
Plug-and-play
Engineer install
Scalability
Instant
Limited
Features
40+ advanced tools
Very basic
Maintenance
Minimal
Ongoing costs
Cost Breakdown: VoIP vs Landline
Cost Component VoIP Landline
Line rental
£0
£15-£20
Monthly licence
£10-£25
N/A
Call costs
Low / included
Higher
Installation
£0-£50
£100-£250
Maintenance
Minimal
Ongoing
Remote access
Included
Not possible
Most businesses reduce phone costs by 40-70% after switching
👉 Compare VoIP deals and cut your costs →
Why the PSTN Switch-Off Means You Must Move Now
Landlines will not work after 2027, and that includes and switching early means:
✔ Avoiding last-minute disruption
✔ Securing better deals before demand spikes
✔ Time to train staff properly
✔ Smooth migration with no downtime
💡 Waiting until 2027 = higher costs + rushed decisions
What UK SMEs Need for a Smooth VoIP Migration You’ll need:
✔ A stable internet connection
FTTP or leased line recommended
Minimum speeds: 10Mb per user for HD calling
✔ VoIP licences
Common providers charge £7–£20 per seat per month.
✔ Optional phones or headsets
Use:
Desk IP phones
Softphone apps
Mobile apps
✔ Call routing setup
Auto-attendants
Hunt groups
IVR menus
Voicemail-to-email
Call recording
✔ Number porting
You can keep your current landline number-porting takes 7–14 days.
What VoIP Can Do That Landlines Never Could
Feature
Business Benefit
Call recording
Compliance & training
Mobile apps
Work from anywhere
CRM integration
Better sales tracking
Call analytics
Improve performance
Video calling
Unified communication
Multi-site support
One system, all locations
What Happens if You Don’t Switch? If you ignore the PSTN switch-off:
Your phones stop working
You can’t make or receive calls
Alarms and lift lines fail
Customer support collapses
Sales teams lose inbound calls
Payment terminals may stop processing
For many businesses, this becomes an operational emergency, so switching is essential.
Migration Timeline: How Long Does It Take?
Stage Time
Choose provider
1-3 days
Number porting
7-14 days
Setup
1-2 days
Training
1 hour
Full migration
10-20 days
You can switch without downtime using “parallel running” (keeping landline + VoIP active temporarily).
Compare VoIP Phone Systems Now
✔ Save up to 40% on costs
✔ Free, no-obligation quotes
✔ UK trusted providers
✔ Switch before 2027 deadline
👉 Compare VoIP deals in under 60 seconds →
FAQs Is VoIP replacing landlines in the UK?
Yes, all PSTN and ISDN services are being permanently switched off by 2027.
Will my landline stop working?
Yes. After the switch-off, traditional landlines will no longer function.
Is VoIP cheaper than landlines ?
Yes. Most businesses save 40-70% due to lower call costs and no line rental.
Can I keep my existing number?
Yes, number porting usually takes 7-14 days.
Does VoIP work during internet outages?
With backup options (4G/5G failover), your system can stay online.
Is VoIP good for remote teams?
Yes, staff can make and receive calls from anywhere.
How quickly can I switch?
Most businesses switch within 10-20 days.
Here is a Handy Youtube Video About VoIP FAQS
Related VoIP Guides & Resources Compare VoIP Systems & Costs
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VoIP Comparisons & Key Decisions
VoIP Providers UK
VoIP Software & Phone Systems
Features, Setup & Performance
Security, Compliance & Technical Guides
Industry & Use Case Guides
Hardware & Equipment
Help & FAQs
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Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
