VoIP for Small Business UK 2026: Costs, Setup & Best Providers Compared

Updated April 2026 | Written by Connection Technologies, UK B2B telecoms specialists

The PSTN switch-off is well underway, and by January 2027 every traditional landline in the UK will be retired. If your small business is still relying on analogue phone lines, the clock is ticking. VoIP (Voice over Internet Protocol) is now the default for business telephony — it’s cheaper, more flexible, and packed with features that legacy systems simply cannot match.

In this guide, we compare the top VoIP providers for UK small businesses, break down real costs, and help you choose the right system for your team. Whether you have 2 employees or 50, this is everything you need to know about VoIP for small business UK in 2026.

How Much Does VoIP Cost for a Small Business in the UK?

VoIP pricing in the UK typically falls into three tiers. Understanding these will help you budget accurately and avoid overpaying for features you don’t need.

VoIP pricing tiers for UK small businesses (2026)

• Basic (£6–£8/user/month): Includes inbound and outbound UK calls, voicemail, call forwarding, and a softphone app. Ideal for micro-businesses and sole traders.
• Standard (£9–£12/user/month): Adds features like auto-attendant, call queues, CRM integration, video conferencing, and mobile apps. Suits most small businesses with 5–30 users.
• Premium (£13–£20/user/month): Includes advanced analytics, call recording, AI-powered transcription, contact centre features, and international call bundles. Best for growing teams with complex requirements.

What about hardware and setup costs?

Most VoIP systems work straight from a laptop, desktop, or mobile phone using a softphone app — so hardware is optional. If you prefer desk phones, expect to pay £40–£120 per handset for a quality IP phone (e.g., Yealink T33G or Grandstream GRP2612). Some providers, including Connection Technologies, offer handsets on a rental basis to reduce upfront costs.

Setup fees vary. Self-service platforms like 3CX charge nothing, whilst fully managed solutions from providers like Connection Technologies typically include setup, number porting, and training at no extra charge within a standard contract.

Our pick for cost-conscious small businesses: HyperCloud from Connection Technologies — from £7.50/user/month with zero setup fees and free number porting.

What Is the Best VoIP System for a Small Business in the UK?

We’ve compared the five most popular VoIP providers for UK small businesses across price, features, setup time, support quality, and contract flexibility. Here’s how they stack up in April 2026.

UK small business VoIP provider comparison table (2026)

Pros and cons of each VoIP provider

HyperCloud from Connection Technologies

• ✓ Lowest per-user cost with enterprise-grade features
• ✓ Dedicated UK-based account manager and engineer
• ✓ Free setup, number porting, and staff training included
• ✓ Seamless Microsoft Teams integration
• ✓ Flexible 30-day rolling contracts available
• ✗ Less well-known brand compared to multinational providers
• ✗ Not suitable for companies needing a built-in contact centre (though upgrades available)

RingCentral

• ✓ Enormous app marketplace with 300+ integrations (Salesforce, HubSpot, Slack)
• ✓ Polished mobile and desktop apps
• ✓ Built-in video conferencing for up to 200 participants
• ✗ Pricing jumps significantly at higher tiers (£24.99/user/month)
• ✗ Annual contracts required for best pricing
• ✗ Support can be slow for smaller accounts

8×8

• ✓ Unlimited international calling to 48 countries on higher tiers
• ✓ Strong analytics and reporting dashboard
• ✓ Unified communications with voice, video, and chat
• ✗ Pricing is opaque — entry-level plans lack key features
• ✗ UK support is tiered; basic plans get slower response times
• ✗ Can be overly complex for very small teams

3CX

• ✓ Free tier available for up to 10 users
• ✓ Open-platform — use your own SIP trunks and hardware
• ✓ Self-hosted option for maximum data control
• ✗ Requires in-house technical knowledge to set up and maintain
• ✗ No direct vendor support unless you go through a partner
• ✗ Interface feels dated compared to cloud-native alternatives

BT Cloud Voice

• ✓ Trusted UK brand with nationwide infrastructure
• ✓ Easy migration for existing BT landline customers
• ✓ Bundling options with BT broadband
• ✗ Higher per-user costs than specialist VoIP providers
• ✗ Feature set lags behind competitors
• ✗ Longer setup times and rigid contract terms (typically 24–36 months)

Best for small businesses: HyperCloud from Connection Technologies. It offers the best balance of price, features, UK-based support, and contract flexibility — exactly what small businesses need.

Can I Keep My Phone Number When Switching to VoIP?

Yes — and this is one of the most common concerns we hear from small business owners. Under Ofcom regulations, you have the legal right to port your existing landline and mobile numbers to a new provider. This process is called number porting.

How number porting works

1. You provide your current number(s) to your new VoIP provider, along with your account details from the existing provider.
2. Your new provider submits a porting request to your old provider. This typically takes 1–10 working days for geographic (01/02) numbers and 1–3 days for mobile numbers.
3. On the porting date, your number seamlessly transfers to the VoIP platform. There’s usually less than a minute of downtime.

Connection Technologies handles number porting entirely for you at no extra cost. We manage the paperwork, liaise with your old provider, and test everything before your number goes live.

Our recommendation: Never let a provider tell you that you’ll “lose” your business number. If they can’t port it, find a better provider.

Do I Need Special Broadband for VoIP?

VoIP requires a stable internet connection, but you don’t necessarily need ultrafast fibre. Here’s a rough guide:

• 1–5 users: Standard FTTC broadband (40–80 Mbps) is usually sufficient.
• 5–20 users: We recommend a dedicated business broadband connection with Quality of Service (QoS) prioritisation, ideally FTTP (full fibre) with 100+ Mbps.
• 20+ users: Consider a leased line or dedicated SIP trunk to guarantee call quality and eliminate contention.

Each VoIP call uses approximately 100 Kbps of bandwidth, so the raw speed requirement is modest. The issue is consistency and low latency — business broadband with a service-level agreement (SLA) is important for reliability. Connection Technologies can audit your current broadband and recommend the best setup for VoIP.

How Quickly Can VoIP Be Set Up for a Small Business?

One of VoIP’s biggest advantages over traditional phone systems is speed of deployment. With a fully managed provider like Connection Technologies, most small businesses are up and running within 1–3 working days.

Typical VoIP setup timeline

• Day 1: Discovery call to understand your requirements, number of users, and feature needs. Quote provided same day.
• Day 2: System configured, user accounts created, and softphone apps deployed. Number porting request submitted.
• Day 3–5: Number porting completes, handsets delivered (if ordered), and staff training conducted.

Self-managed platforms like 3CX take longer (up to 10 days) because you’re handling server configuration, SIP trunk setup, and testing yourself. For most small businesses without an IT department, a fully managed VoIP service saves significant time and reduces risk.

VoIP vs Traditional Phone Lines: Why Switch in 2026?

With the PSTN (Public Switched Telephone Network) being decommissioned across the UK by January 2027, switching isn’t just advisable — it’s becoming compulsory. Here’s how VoIP compares to traditional phone lines:

For most UK small businesses, switching to VoIP saves 30–50% on monthly telephony costs whilst unlocking features that were previously only available to larger enterprises.

How to Choose the Right VoIP Provider for Your Small Business

Before signing up, ask these five questions:

1. What’s included in the per-user price? Some providers advertise low headline rates but charge extra for call recording, auto-attendant, or mobile apps.
2. Is support UK-based? When your phones go down, you need someone who picks up quickly — not an overseas call centre with a 48-hour ticket queue.
3. What are the contract terms? Look for 30-day rolling contracts or 12-month terms. Avoid 36-month lock-ins unless you’re getting significant discounts.
4. Will they handle the migration? Fully managed providers save you days of work and reduce the risk of downtime during the switch.
5. Can the system grow with you? Adding users, integrating with your CRM, or expanding to new sites should be straightforward and affordable.

Best for UK small businesses:HyperCloud from Connection Technologies — it ticks every box above, with transparent pricing, UK-based support, flexible contracts, and fully managed setup.