How much does a business phone system cost in the UK? (2026 prices)

With the copper landline network closing on 31 January 2027, most UK businesses are pricing up a replacement phone system for the first time in years. The good news: a cloud phone system costs a fraction of an old line rental plus a phone system in a cupboard. Here is what you actually pay, with real numbers.

The short answer

A cloud business phone system in the UK costs roughly £5 to £20 a month for a small business, with no hardware to buy. You pay a monthly fee for the plan, which includes your UK number, the users on it and a bundle of calls. Silux Call prices (per month, excluding VAT) are:

• Entry, £4.75: 1 user and your own UK landline number, unlimited inbound calls and 2,000 outbound UK minutes. Includes a "press 1 for sales" menu, hunt groups, voicemail to email and holiday mode.
• Plus, £8.95: 3 users on one landline, unlimited calls to UK landlines and mobiles, call queues, business-hours routing and automatic call recording.
• Growth, £11.95: 6 users, conference calls, call park, supervisor listen-in and the scam and spam shield.
• Pro, £18.95: 10 users, call transcription, card payments over the phone and AI receptionist minutes.

Need another number on the same account? An extra landline is £5.99 a month and adds one more call at a time.

What it costs by business size

Sole trader or one-person business

Entry at £4.75 a month covers most one-person businesses: a proper local number that rings your mobile app, desk phone or browser, with voicemail sent to your email. Over a year that is £57 plus VAT, less than many people pay for a single month of a traditional landline with line rental.

Small office (2 to 3 people)

Plus at £8.95 a month gives three users one shared number with unlimited UK calls, so nobody watches the minutes. Calls can ring everyone at once, ring in turn, or wait in a queue with music until someone is free.

Growing team (up to 10 people)

Growth (6 users) or Pro (10 users) adds the tools a busier team needs: listen-in and whisper for training, call park, conference calls, transcription and phone payments. Even Pro works out under £2 per user per month.

Costs people forget

• VAT. Business phone prices are usually quoted without VAT. 20% is added on top, which a VAT-registered business can normally reclaim.
• Hardware. You do not need any. The free mobile, desktop and browser apps work on what you already own. Desk phones are optional.
• Moving your number. Some providers charge to port your existing number. Porting is free with every Silux Call plan.
• Contracts. Long contracts make the cheapest monthly price expensive if you outgrow it. Silux Call needs 30 days' notice and no long contract.
• Calls abroad. Plans cover UK landlines, mobiles and freephone numbers. International calling is available on request, at extra cost.

How to compare quotes fairly

1. Count users and numbers separately: some providers charge per user, others per line.
2. Check what "unlimited" covers. Usually UK landlines and mobiles, not 084, 087 or 09 numbers.
3. Ask whether call recording, menus and queues are included or extra.
4. Check the notice period and any setup or porting fees.

You can try the full system free for 7 days, then pick the plan that fits. See all prices on the pricing page, or compare us with other UK providers on our comparison page.