Switching From Business Landline to VoIP

By Olivia Johnson - Trusted UK Business Expert

Last Updated 12th of January 2026

4 minute read

Many businesses are moving away from traditional landlines and adopting VoIP systems. This change offers better features, lower costs, and greater flexibility. If you are thinking about switching, we can guide you through the process with expert insight.

Switching from a business landline to VoIP means replacing fixed copper-based phone lines with internet-based calling. The process involves choosing a VoIP provider, setting up equipment, porting numbers, and training staff. It reduces costs, adds features, and future-proofs communication.

VoIP is more than just cheaper calls—it reshapes how businesses connect with clients and teams. In this guide, we’ll cover everything you need to know, from benefits and challenges to practical steps for a smooth transition.

Make the move with confidence. Discover the benefits, costs, and best providers for your business. 👇 Click below to compare Business Landline to VoIP options now.

Switching From Business Landline to VoIP

Switching from a business landline to VoIP is a major step for many organisations, but one that is increasingly necessary as the UK prepares to phase out traditional copper phone lines. By 2025, BT Openreach will complete its nationwide Public Switched Telephone Network (PSTN) switch-off, meaning businesses must move to digital alternatives such as VoIP.

VoIP (Voice over Internet Protocol) allows phone calls to travel over the internet instead of through copper wires. For businesses, this offers cheaper calling, mobility, and advanced features such as call forwarding, conferencing, voicemail-to-email, and integration with customer relationship management (CRM) systems. Unlike landlines, VoIP is not tied to a single desk or location, giving companies more freedom and scalability.

The switch involves several steps, including selecting the right provider, upgrading internet connections if needed, setting up handsets or softphones, and ensuring compliance with data protection rules. Businesses must also carefully plan number porting so clients can still reach them on their existing numbers.

Why Businesses Are Switching to VoIP

The main reasons businesses switch from landline to VoIP include:

• Cost savings – Calls, especially international ones, are significantly cheaper.
• Flexibility – Staff can work from home or on the move using VoIP apps.
• Advanced features – VoIP offers tools that landlines cannot match.
• Scalability – Adding new users is quick and affordable.
• Future-proofing – With the PSTN switch-off, VoIP is the only long-term option.

Case Study Example

A medium-sized accountancy firm in London cut its telecoms costs by 40% after moving from a landline system to VoIP. Staff could also take client calls from home, improving service during busy tax seasons.

Steps to Switch From Landline to VoIP

Switching requires planning. Here is a step-by-step outline:

1. Assess current phone usage – Review how many lines, extensions, and call volumes you have.
2. Check internet capacity – Ensure you have enough bandwidth to support voice traffic.
3. Choose a VoIP provider – Compare reliability, support, features, and pricing.
4. Decide on hardware/software – VoIP can work with desk phones, headsets, or computer-based apps.
5. Plan number porting – Transfer existing numbers to avoid disruption.
6. Set up and train staff – Ensure everyone knows how to use the system.
7. Test before full switch – Run a trial phase before cutting off landlines completely.

Comparing Landline vs VoIP

Challenges of Switching to VoIP

While the benefits are clear, businesses must prepare for challenges:

• Internet dependency – If your broadband fails, so does your phone system.
• Quality issues – Poor internet can cause dropped or low-quality calls.
• Security – VoIP requires encryption and firewalls to prevent hacking.
• Staff adjustment – Employees may need training on new tools.

These challenges are not barriers, but they must be addressed with proper planning.

Choosing the Right VoIP Provider

When selecting a VoIP provider, consider:

• Reliability – Look for uptime guarantees and customer support.
• Features – Ensure the package includes what your business needs.
• Pricing – Watch for hidden fees such as call recording or number porting.
• Integration – If you use Microsoft Teams, Zoom, or a CRM, check compatibility.
• Security – The provider should offer encryption and compliance with GDPR.

Costs of Switching to VoIP

VoIP is usually cheaper than landlines. Businesses often save up to 50% on telecom bills. However, costs vary depending on:

• Setup fees
• Hardware (desk phones, headsets)
• Monthly subscription plans
• Call rates (often free or very low within the UK)

Example: A business paying £300 per month for landlines could see bills reduced to £150 or less with VoIP.

The Future: PSTN Switch-Off and Digital Phones

The UK PSTN switch-off means every business must go digital by 2025. Those that prepare early will avoid last-minute disruptions and may gain a competitive edge. Switching now ensures continuity, modern features, and cost reductions.

Ready to future-proof your business communications? Switching to VoIP is simpler than you think. Click the link below to explore the best VoIP solutions for your company today.

FAQ

Will I lose my current phone number if I switch to VoIP?

No, most providers allow number porting, so you can keep your existing numbers.

Do I need special internet for VoIP?

A stable broadband or fibre connection is required. For multiple users, a business-grade connection is recommended.

Is VoIP secure?

Yes, with the right provider and security settings, VoIP can be highly secure. Look for encryption and GDPR compliance.

What happens if my internet goes down?

Many providers offer call forwarding to mobiles, ensuring business continuity.

Is VoIP suitable for small businesses?

Absolutely. VoIP scales easily, so even small businesses benefit from cost savings and modern features.

Save money, boost flexibility, and future-proof your communications by making the switch today. Tap the button to see top-rated Business Landline to VoIP deals.