Business VoIP Cost Calculator UK 2026: Estimate Your Monthly Phone System Costs Quick answer
Business VoIP costs in the UK typically range from around £8 to £30+ per user per month , depending on the provider, features, call bundles, contract length, hardware and whether you choose hosted VoIP, Microsoft Teams Phone, SIP trunking, UCaaS or contact centre VoIP.
Most UK SMEs pay around £10 to £25 per user per month for a hosted VoIP or cloud phone system. SIP trunking can be cheaper for businesses with an existing PBX, while contact centre VoIP costs more because it includes advanced call routing, call recording, reporting, analytics and agent tools.
Use our calculator below to estimate your monthly VoIP licence costs, SIP trunk costs, call bundle charges, hardware, setup, migration costs and potential savings compared with your current phone bill.
With the UK PSTN switch-off due by January 2027, businesses still using traditional landlines or ISDN should compare VoIP quotes before they are forced to migrate.
👉 Compare business VoIP quotes and see whether your company could save 15% to 30%
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: August 2026
Business VoIP Cost Calculator UK
Estimate your monthly and annual business VoIP phone system costs, including users, SIP channels, call bundles, hardware, setup, call recording and potential savings.
Current phone system
Traditional landline ISDN On-premise PBX Hosted VoIP Microsoft Teams Phone SIP trunking No current business phone system Not sure Your current setup affects migration, number porting and setup costs.
VoIP solution type
Hosted VoIP / Cloud PBX Microsoft Teams Phone SIP trunking UCaaS Contact centre VoIP Not sure Different systems use different pricing models.
CRM integration required?
No Basic integration Advanced integration Not sure CRM integrations may increase setup or monthly costs.
Contact centre features required?
No Basic call queues Advanced contact centre Sales/support call centre Not sure Contact centre features cost more than standard business VoIP.
Broadband/connectivity upgrade needed?
No Maybe Yes Not sure Poor broadband can affect VoIP call quality.
Contract length
Rolling monthly 12 months 24 months 36 months Used to estimate total cost over the chosen period.
Your estimated business VoIP costs
Monthly SIP trunk cost
£0
Monthly call usage cost
£0
Estimated monthly total
£0
One-off setup & hardware
£0
First-year total estimate
£0
Estimated saving vs current bill
£0
Enter your business phone system details to estimate VoIP costs.
Recommendation will appear here.
This calculator is an estimate only. Actual VoIP costs vary by provider, user numbers, call bundles, SIP channels, Microsoft Teams Phone setup, hardware, setup fees, number porting, call recording, CRM integrations, contact centre features, broadband quality, support level and contract terms.
Key takeaways
Most UK businesses pay around £10 to £25 per user per month for hosted VoIP or Cloud PBX.
Basic VoIP plans may start from around £8 to £12 per user per month .
More advanced UCaaS, multi-site and contact-heavy systems can cost £18 to £30+ per user per month .
Contact centre VoIP can cost £40 to £100+ per agent per month .
SIP trunking is usually priced per simultaneous call channel rather than per user.
Microsoft Teams Phone can be cost-effective if your business already uses Microsoft 365, but calling plans, Direct Routing, Operator Connect and support can increase the total cost.
Desk phones are optional, but can add one-off hardware costs.
Softphones, mobile apps and headsets can reduce upfront hardware spend.
Call recording, CRM integrations, analytics and contact centre features increase monthly VoIP costs.
Number porting, setup, migration and staff onboarding may add one-off costs.
The UK PSTN switch-off means businesses using old landlines should plan their VoIP migration before January 2027.
Comparing VoIP quotes can reduce costs by 15% to 30%, especially for businesses with 5+ users.
How does the Business VoIP Cost Calculator work? The calculator estimates your monthly and annual business VoIP costs by adding together the main costs involved in a phone system quote, so it can estimate:
monthly user licence costs
SIP trunk channel costs
UK call bundle costs
international calling costs
call recording costs
CRM or contact centre add-ons
desk phone hardware costs
headset costs
setup and migration costs
number porting costs
broadband or connectivity upgrade costs
first-year total cost
possible monthly savings compared with your current phone bill
This gives you a clearer view of what your business may actually pay, rather than only looking at the advertised “per user” price.
What is included in a VoIP cost estimate?
A proper business VoIP quote should include more than the headline monthly licence.
Cost item What it means Why it matters
User licences
Monthly cost per employee or extension
The main cost for hosted VoIP, Cloud PBX and UCaaS
SIP channels
Monthly cost per simultaneous call channel
The main cost for SIP trunking
Call bundles
Inclusive UK landline/mobile minutes or usage allowance
Some providers include calls, others charge separately
International calls
Calls made outside the UK
Can increase monthly bills quickly
Desk phones
Physical VoIP handsets
Useful for reception, shared desks and call-heavy staff
Headsets
Used with softphones or laptop calling
Often cheaper than buying desk phones for every user
Call recording
Recording inbound or outbound calls
Often charged as an add-on
CRM integration
Connecting calls with systems like HubSpot, Salesforce or Zoho
May need a higher plan or setup fee
Contact centre features
Call queues, analytics, wallboards and agent tools
Usually much more expensive than standard VoIP
Number porting
Moving existing business phone numbers to a new provider
May involve one-off costs and migration planning
Setup and onboarding
Configuration, call flows, user setup and training
Can be free for simple systems or more expensive for complex migrations
Connectivity
Broadband, leased line, router or backup connection
Poor internet can affect VoIP call quality
Typical business VoIP costs UK 2026
Most UK businesses pay for VoIP using one of five pricing models.
VoIP solution Typical monthly cost Best for
Basic hosted VoIP
£8-£12 per user
Very small teams and simple calling
Standard hosted VoIP / Cloud PBX
£10-£25 per user
Most SMEs replacing landlines
Advanced UCaaS
£18-£30+ per user
Multi-site, hybrid and collaboration-heavy teams
Microsoft Teams Phone
£8-£20+ per user, often on top of Microsoft 365
Businesses already using Microsoft 365
SIP trunking
£3-£10 per channel
Businesses with an existing PBX
Contact centre VoIP
£40-£100+ per agent
Sales, service, support and call centre teams
VoIP desk phones
£40-£200+ each
Reception, office staff and shared desks
Setup and migration
£0-£500+ one-off
Depends on complexity, users and number porting
VoIP costs by number of users
The number of users is usually the biggest cost driver for hosted VoIP, Cloud PBX and UCaaS.
Number of users Basic estimate Typical SME estimate Advanced estimate
1 user
£8-£15/month
£15-£25/month
£30+/month
3 users
£24-£45/month
£45-£75/month
£90+/month
5 users
£40-£75/month
£75-£125/month
£150+/month
10 users
£80-£150/month
£150-£250/month
£300+/month
20 users
£160-£300/month
£300-£500/month
£600+/month
50 users
£400-£750/month
£750-£1,250/month
£1,500+/month
100 users
£800-£1,500/month
£1,500-£2,500/month
£3,000+/month
These estimates exclude one-off hardware, advanced call recording, contact centre software, complex integrations and broadband upgrades.
VoIP costs by solution type
Hosted VoIP / Cloud PBX
Hosted VoIP is the most common choice for UK SMEs replacing landlines, and they can cost:
£10-£25 per user per month
Hosted VoIP usually suits:
small offices
growing SMEs
businesses replacing landlines
hybrid teams
companies without an existing PBX
businesses wanting support and simple management
Typical features include:
business phone numbers
voicemail
mobile apps
desktop apps
hunt groups
call forwarding
auto attendant
basic call reporting
Microsoft Teams Phone
Microsoft Teams Phone can work well if your business already uses Microsoft 365 - costing:
£8-£20+ per user per month, often on top of Microsoft 365
You may need:
Teams Phone licence
Microsoft calling plan
Operator Connect
Direct Routing
SIP provider costs
Teams-certified devices
specialist setup or support
Teams Phone may be cheaper for businesses already using Teams every day, but costs can rise once external calling, compliance recording, advanced call queues or contact centre tools are added.
SIP trunking
SIP trunking is priced per simultaneous call channel rather than per user - the cost is around:
£3-£10 per channel per month
SIP trunking usually suits:
businesses with an existing PBX
hotels
factories
warehouses
schools
large teams with low call concurrency
businesses with technical support
SIP trunking can be cheaper at scale, but it requires more planning than hosted VoIP.
UCaaS
UCaaS stands for Unified Communications as a Service, and it combines calling with tools like:
video meetings
team messaging
mobile apps
desktop apps
analytics
integrations
collaboration tools
Typical cost: £18-£30+ per user per month
UCaaS is usually best for multi-site, remote, hybrid or collaboration-heavy teams.
Contact centre VoIP
Contact centre VoIP is more expensive because it includes specialist sales and support features. it will set you back:
£40-£100+ per agent per month
It can often include:
call queues
IVR
call recording
wallboards
real-time analytics
supervisor tools
call whisper
call barging
CRM integration
quality monitoring
A standard office team should not pay for contact centre software unless they need these features.
Business VoIP cost examples
Example 1: small office with 5 users
Cost item Example cost
5 hosted VoIP users at £12/month
£60/month
Headsets
£150 one-off
Number porting
£25 one-off
Monthly call bundle
Included
Estimated monthly cost £60/month
Estimated first-year cost £895
Example 2: growing SME with 20 users
Cost item Example cost
20 hosted VoIP users at £18/month
£360/month
Call recording for 5 users at £6/month
£30/month
10 desk phones at £90 each
£900 one-off
Setup and onboarding
£250 one-off
Estimated monthly cost £390/month
Estimated first-year cost £5,830
Example 3: business using SIP trunking
Cost item Example cost
12 SIP channels at £6/month
£72/month
Call bundle and usage
£120/month
Support and failover
£60/month
Setup
£300 one-off
Estimated monthly cost £252/month
Estimated first-year cost £3,324
Example 4: contact centre team
Cost item Example cost
10 contact centre agents at £60/month
£600/month
CRM integration
£100/month
Call recording/storage
£75/month
Setup and training
£500 one-off
Estimated monthly cost £775/month
Estimated first-year cost £9,800
Best VoIP option by business type
Business type Best VoIP option to compare Why
Sole trader
Basic hosted VoIP or business mobile
Low cost and simple setup
Small office
Hosted VoIP / Cloud PBX
Predictable per-user pricing and easy management
Growing SME
Hosted VoIP or UCaaS
Better call routing, reporting and support
Microsoft 365 business
Microsoft Teams Phone
Works within the Teams environment
Business with existing PBX
SIP trunking
Can reduce costs without replacing the full system immediately
Hotel, warehouse or factory
SIP trunking or hosted VoIP
Depends on existing PBX, site setup and call volume
Multi-site business
UCaaS or managed hosted VoIP
Centralised users, numbers and support
Sales or support team
Contact centre VoIP
Call queues, recording, CRM integration and reporting
When should you compare VoIP quotes?
You should compare VoIP quotes if:
your current phone contract is ending
your phone bill has increased
you still use landlines or ISDN
you need to prepare for the PSTN switch-off
you are moving office
you are hiring more staff
you need remote or hybrid working support
call quality is poor
you want Microsoft Teams Phone
you need SIP trunks
you need call recording
you need CRM integration
you need multi-site calling
you are paying for unused licences
you need better UK support
Why compare business VoIP quotes with Compare Your Business Costs?
Compare Your Business Costs helps UK businesses compare VoIP and business phone system quotes based on users, call volume, features, connectivity and migration needs.
You can compare:
hosted VoIP providers
Cloud PBX providers
SIP providers
Microsoft Teams Phone options
UCaaS platforms
contact centre VoIP
business phone systems for SMEs
multi-site phone systems
VoIP migration options
business broadband and VoIP bundles
Compare quotes if you want to check:
monthly licence costs
call bundle costs
desk phone costs
setup and porting fees
support options
contract length
Teams Phone vs hosted VoIP
SIP trunking vs Cloud PBX
contact centre add-ons
potential savings against your current bill
👉 Compare business VoIP quotes now
Verdict: how much will business VoIP cost?
Most UK SMEs should expect to pay around £10 to £25 per user per month for hosted VoIP or Cloud PBX.
Very small businesses may pay closer to £8 to £15 per user per month .
More advanced UCaaS and multi-site systems may cost £18 to £30+ per user per month .
Contact centre VoIP may cost £40 to £100+ per agent per month .
SIP trunking can be cheaper per channel, but only if your business has the right PBX setup and call capacity planning.
Final recommendation: use the calculator above to estimate your monthly cost, then compare VoIP providers based on user numbers, call bundles, support, migration costs, broadband quality and contract terms.
FAQs: Business VoIP Cost Calculator
What is a business VoIP cost calculator?
A business VoIP cost calculator estimates how much your company may pay for hosted VoIP, Cloud PBX, Microsoft Teams Phone, SIP trunking, UCaaS or contact centre VoIP.
How much does business VoIP cost in the UK?
Most UK businesses pay around £10 to £25 per user per month for hosted VoIP or Cloud PBX. Basic plans may be cheaper, while UCaaS and contact centre systems can cost more.
How do I calculate VoIP costs?
Multiply your number of users by the monthly cost per user, then add call bundles, SIP channels, add-ons, hardware, setup, porting and connectivity costs.
Is VoIP cheaper than a landline?
In many cases, yes. VoIP can reduce line rental, call costs and PBX maintenance, while adding remote working and call management features.
What is the cheapest business VoIP option?
Basic hosted VoIP is often cheapest for small businesses. SIP trunking can be cheaper for businesses with an existing PBX and predictable call volumes.
How much does VoIP cost for 5 users?
A 5-user hosted VoIP system may cost around £50 to £125 per month before hardware, setup and advanced features.
How much does VoIP cost for 20 users?
A 20-user hosted VoIP system may cost around £200 to £500 per month before hardware, call recording, contact centre tools or complex integrations.
How much does VoIP cost for 50 users?
A 50-user VoIP system may cost around £500 to £1,500+ per month depending on provider, features and support. SIP trunking may be cheaper if the business has an existing PBX.
Does Microsoft Teams Phone cost less than hosted VoIP?
It can, especially if your business already uses Microsoft 365. However, calling plans, Direct Routing, Operator Connect, compliance recording and contact centre integrations can increase the total cost.
What extra VoIP costs should I budget for?
Common extras include desk phones, headsets, number porting, setup, call recording, CRM integrations, international calls, contact centre tools and broadband upgrades.
Do I need desk phones for VoIP?
No. Many businesses use softphones, mobile apps and headsets. Desk phones are still useful for reception, shared areas and call-heavy staff.
Does VoIP need business broadband?
Yes, VoIP needs a stable internet connection. Poor broadband can cause call quality issues, so some businesses need a better broadband connection, backup line or leased line.
Will the PSTN switch-off affect my business?
Yes, if you still use traditional landlines, ISDN or PSTN-reliant devices. Businesses should review phone lines, alarms, lifts, payment terminals and other connected systems before January 2027.
Can I save money by comparing VoIP quotes?
Yes. Comparing providers can help reduce costs, especially if your current contract is ending, you have 5+ users, or you are moving away from old landlines.
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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.
