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Business VoIP Phone Systems UK 2026: Compare Costs, Providers & Quotes

Quick answer

A business VoIP phone system lets your company make and receive calls over the internet instead of using traditional analogue phone lines.

Most UK businesses now compare one of four options:

VoIP setup Typical UK cost guide
Best for
Hosted VoIP / Cloud PBX £10-£25 per user/month
Most small and medium-sized businesses
Microsoft Teams Phone £12-£30+ per user/month once calling and support are included
Businesses already using Microsoft 365
SIP trunking £5-£25 per channel/month
Businesses keeping an existing PBX
Contact centre VoIP £35-£100+ per agent/month
Sales, support and call-heavy teams

VoIP is worth comparing if you want:

  • cheaper or more flexible business calling
  • remote and hybrid working
  • call routing and queues
  • voicemail-to-email
  • call recording
  • mobile and desktop apps
  • Microsoft Teams calling
  • CRM integrations
  • multi-site phone management
  • a replacement for landlines before the PSTN switch-off

The UK’s old analogue phone network is being retired by 31 January 2027, so businesses still using traditional landlines, ISDN or legacy phone systems should review their options now.

The best VoIP system depends on your users, simultaneous calls, current phone setup, internet connection, Microsoft 365 usage, support needs and whether you need handsets, call recording or CRM integration.

Compare Business VoIP Quotes

Free quotes • No obligation • Compare UK VoIP providers

Get tailored quotes for your business

 

Get a VoIP quote based on your business

Use this page if you are comparing:

  • business VoIP phone systems
  • VoIP costs UK
  • hosted VoIP
  • cloud PBX
  • business phone systems
  • office phone systems
  • Microsoft Teams Phone
  • SIP trunking
  • VoIP providers UK
  • VoIP for small businesses
  • VoIP for remote teams
  • VoIP for call centres
  • VoIP for sales teams
  • VoIP with call recording
  • VoIP with CRM integration
  • VoIP number porting
  • VoIP before PSTN switch-off
  • digital phone line replacement
  • landline replacement for business
  • business phone system quotes

 

Business VoIP Calculator UK

Estimate your monthly VoIP cost, annual spend, hardware and setup costs, first-year cost and potential savings.


Include employees who need their own VoIP extension or licence.

Choose the phone system your business is considering.

Used to tailor the migration recommendation.

Typical hosted VoIP licence cost before optional extras.

Only relevant if you are comparing SIP trunking.

Enter 0 if SIP channels are not required.

Estimated monthly cost for bundled UK calls.

Put 0 if international or premium calls are not relevant.

Enter 0 if staff will use softphones or existing devices.

Estimated one-off cost per handset.

Useful for softphones, Teams Phone and call-heavy users.

Estimated one-off headset cost.

Only include users who genuinely need call recording.

Enter 0 if recording is included.

CRM integrations can increase monthly cost.

Advanced agent and reporting tools usually cost more.

One-off cost for transferring existing numbers.

Include configuration, setup, training and testing.

Poor broadband can affect VoIP call quality.

Enter 0 if your existing broadband is suitable.

Used to estimate total contract cost.

Used to estimate possible monthly savings.

Optional. Enter another quote to compare against this estimate.

Your estimated business VoIP costs

Monthly licence cost
£0
Monthly SIP cost
£0
Monthly call cost
£0
Monthly add-ons
£0
Estimated monthly VoIP cost
£0
Estimated annual cost
£0
One-off setup / hardware cost
£0
Estimated first-year cost
£0
Estimated total contract cost
£0
Potential monthly saving
£0
Enter your business phone requirements to estimate your VoIP costs.
Recommendation will appear here.

Compare Business VoIP Quotes

Free quotes • No obligation • Compare UK business VoIP providers
This calculator is an estimate only. Actual VoIP costs vary by provider, number of users, licences, call usage, hardware, number porting, integrations, broadband requirements, support level, contract length and optional features.

 

Key Takeaways

  • Business VoIP replaces traditional phone lines with internet-based calling.
  • Most UK SMEs compare hosted VoIP, Microsoft Teams Phone or SIP trunking.
  • Hosted VoIP is usually the simplest option for small and medium-sized businesses.
  • Teams Phone can make sense if your team already uses Microsoft 365 every day.
  • SIP trunking usually suits businesses keeping an existing PBX or handling higher concurrent call volumes.
  • Contact centre VoIP is better for sales, support and call-heavy teams.
  • The UK PSTN switch-off deadline is 31 January 2027.
  • Call quality depends on broadband, latency, jitter, packet loss and network setup.
  • The cheapest VoIP quote is not always the best option if support, porting, call quality or setup are weak.
  • Compare total monthly cost, not just the advertised per-user price.

 

Why businesses should review VoIP now

Business phone systems are changing because the UK is moving from old analogue phone lines to digital services.

Openreach says the existing analogue network will be switched off by 31 January 2027.

This matters if your business still uses:

  • analogue landlines
  • ISDN lines
  • traditional PBX systems
  • fax lines
  • lift lines
  • alarm lines
  • card machine phone lines
  • door entry systems
  • older telephone exchange systems
  • broadband or phone packages linked to legacy copper voice services

Moving to VoIP can help businesses modernise before the deadline, but the right setup needs planning.

You may need to check:

  • which numbers need porting
  • whether your broadband is ready
  • whether alarms, lifts or payment terminals use phone lines
  • whether staff need handsets or softphones
  • whether remote teams need mobile apps
  • whether call recording or compliance features are required
  • whether your current contract has exit fees

Compare Business VoIP Systems

Free quotes • No obligation • Compare hosted VoIP, Teams Phone and SIP providers

Get tailored quotes for your business

 

Business VoIP costs

VoIP option Typical UK cost guide
Best suited to
Basic hosted VoIP £8-£15 per user/month
Sole traders and small teams
Standard hosted VoIP £15-£25 per user/month
Most UK SMEs
Advanced hosted VoIP £25-£40+ per user/month
Larger or customer-facing teams
Microsoft Teams Phone £12-£30+ per user/month
Microsoft 365 businesses
SIP trunking £5-£25 per channel/month
Businesses retaining an existing PBX
Contact-centre VoIP £35-£100+ per agent/month
Sales and support departments
Desk phone hardware £50-£200+ per handset
Businesses wanting physical phones
Headsets £30-£150+ per headset
Softphone, Teams and call-heavy users
Number porting Quote-based
Businesses keeping existing numbers
Setup and installation £0-£500+
More complex migrations and call flows

 

Which type of VoIP phone system do you need?

Your business Recommended starting point Why
One to five users Basic hosted VoIP
Simple setup and predictable monthly pricing
Five to 50 users Managed hosted VoIP
Suitable for queues, routing, apps and reporting
Business already using Microsoft Teams Teams Phone
Keeps calls, meetings and chat within Teams
Business retaining an existing PBX SIP trunking
Modernises external calling without replacing the PBX
Sales or support department Advanced hosted VoIP or contact centre
Adds recording, analytics, CRM tools and queue management
Multi-site organisation Managed cloud VoIP or SIP
Supports centralised routing and multiple locations

Not sure which system fits?

Answer a few questions about your users, existing setup and required features to compare suitable UK options.

Get tailored quotes for your business

 

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

 

Table of contents:

What is a business VoIP phone system?
Call quality requirements (jitter/latency/bandwidth)
How much does business VoIP cost in the UK?
Setup, porting & migration checklist
Best VoIP phone systems by business type (2026)
VoIP security & compliance (UK)
Teams vs hosted VoIP vs SIP trunking (quick comparisons) FAQs
Features that matter (and what to ignore)
Related VoIP guides & provider reviews

Voip phone systems

VoIP cost by business size

Business size Best setup to compare first
Typical monthly cost guide
1-5 users Basic hosted VoIP or Teams Phone
£10-£20 per user
5-20 users Managed hosted VoIP
£12-£25 per user
20-50 users Hosted VoIP or Teams Phone
£15-£30 per user
50-250 users Hosted VoIP, Teams Phone or SIP
£20-£40 per user or channel
250+ users / multi-site SIP, managed cloud VoIP or UCaaS
Quote-based
Sales or support team Advanced hosted VoIP or contact centre
£35-£100+ per agent
Call-heavy business SIP trunking or contact centre VoIP
Quote-based

Per-user estimates are useful, but your actual cost depends on how your business uses calls.

A 10-person office making a few calls per day needs a different setup from a 10-person sales team making hundreds of calls per week.

 

Which VoIP setup should you compare first?

Your situation Best option to compare first
1-5 users Basic hosted VoIP
5-50 users Managed hosted VoIP
Already use Microsoft Teams every day Microsoft Teams Phone
Existing PBX you want to keep SIP trunking
High inbound call volume Advanced hosted VoIP or contact centre
Sales or support team VoIP with CRM integration and call recording
Multi-site business Managed cloud VoIP with central routing
Remote or hybrid team Hosted VoIP or Teams Phone with mobile apps
Need desk phones Hosted VoIP with handsets
Want fewer devices Softphone and mobile app setup
Poor call quality currently VoIP plus broadband or network review
Still using landlines Hosted VoIP migration before PSTN switch-off
Need call recording for compliance Managed VoIP or contact centre platform
Need international calling Hosted VoIP or SIP with suitable call bundles

👉 Not sure which setup you need? Compare providers here →

Get tailored quotes for your business

 

 

How Does VoIP Work?

Speak → Audio is converted to data → Packet sent online → Reassembled at recipient’s end. Works across apps, physical phones, tablets – wherever there’s internet.

How does cloud based voip work

 

Hosted VoIP vs SIP trunking

Feature Hosted VoIP Microsoft Teams Phone SIP trunking
Pricing model Per user/month Per user/month plus calling and support Per channel/month
Typical UK cost £10-£25 per user £12-£30+ per user once fully configured £5-£25 per channel
Best for Most SMEs Microsoft 365 businesses Existing PBX or call-heavy setups
Setup complexity Low to medium Medium Medium to high
PBX included Yes, cloud PBX Teams-based calling No, uses existing PBX
Desk phones Optional Optional Usually linked to existing setup
Mobile apps Yes Yes Depends on PBX
Call queues and IVR Usually Available but setup varies Depends on PBX
CRM integration Common Depends on setup and apps Depends on PBX
Provider management Usually managed Shared Microsoft/provider/admin responsibility More technical
Best avoided if You need deep Microsoft-only setup You do not use Teams You do not have PBX/network support

Choose hosted VoIP if:

  • you want the simplest landline replacement
  • you do not have internal IT support
  • you want predictable monthly pricing
  • you need call queues, IVR and mobile apps
  • you have 1-50 users
  • you want provider-managed setup

Choose Microsoft Teams Phone if:

  • your team already uses Microsoft Teams daily
  • you want calls, chat and meetings in one app
  • you use Microsoft 365 across the business
  • staff are hybrid or remote
  • you are comfortable with Microsoft admin
  • you have support for setup and user management

Choose SIP trunking if:

  • you already have a PBX
  • you want to keep existing phone infrastructure
  • you have high inbound or outbound call volumes
  • you need many concurrent calls
  • you have in-house IT or a managed telecoms partner
  • you need multi-site routing

 

Hosted VoIP

Hosted VoIP, also called cloud PBX, is the most common starting point for small and medium-sized businesses, and with hosted VoIP, the provider hosts and manages the phone system in the cloud.

You usually pay per user per month.

Hosted VoIP can include:

  • business numbers
  • voicemail
  • voicemail-to-email
  • call forwarding
  • hunt groups
  • call queues
  • auto-attendants
  • IVR menus
  • desktop apps
  • mobile apps
  • call recording
  • admin portal
  • reporting
  • CRM integrations
  • number porting
  • desk phones or softphones

Hosted VoIP is usually best for businesses replacing landlines, modernising office phones or supporting hybrid teams.

 

Microsoft Teams Phone

Microsoft Teams Phone adds external calling to Microsoft Teams, so it can suit businesses already using Teams for meetings, chat and collaboration.

Teams Phone can help if you want:

  • one app for calls, meetings and chat
  • calling inside Microsoft Teams
  • Microsoft 365 integration
  • remote and hybrid working
  • fewer separate apps
  • centralised Microsoft admin
  • Teams-compatible headsets and desk phones

However, the final cost may include:

  • Teams Phone licence
  • calling plan or direct routing
  • operator connect/provider support
  • number porting
  • admin setup
  • call recording add-ons
  • contact centre integrations
  • support costs

Teams Phone can look cheaper at first, but it should be compared against hosted VoIP using the full monthly cost.

 

SIP trunking

SIP trunking connects an existing phone system or PBX to the internet., so instead of paying per user, you often pay per channel.

A channel is a simultaneous call path.

For example:

10 SIP channels = up to 10 simultaneous calls.

SIP trunking may suit:

  • businesses with an existing PBX
  • call-heavy organisations
  • businesses with in-house telecoms support
  • multi-site businesses
  • organisations that need high concurrent call capacity
  • contact centres
  • businesses wanting to modernise gradually

SIP trunking is powerful, but it is rarely the simplest starting point for small teams.

 

Contact centre VoIP

Contact centre VoIP is designed for sales, support and service teams and can include:

  • call queues
  • IVR
  • call recording
  • call monitoring
  • live dashboards
  • agent performance reports
  • CRM integration
  • wallboards
  • call whisper
  • call barging
  • power diallers
  • outbound campaigns
  • call tagging
  • quality monitoring
  • supervisor tools

It costs more than basic VoIP, but it can be worth comparing if calls are central to sales or customer service.

 

Hidden costs to watch out for Hidden VoIP Costs to Watch Out For

Some VoIP deals look cheap, but extra costs may include:

  • setup fees
  • number porting fees
  • desk phones or headsets
  • call recording add-ons
  • international call bundles
  • CRM integrations
  • contact centre features
  • broadband or router upgrades
  • early exit fees

👉 Always compare the total monthly cost, not just the advertised per-user price.

 

Is Your Internet Ready for VoIP?

VoIP works best when your internet connection is stable.

The key call quality factors are:

  • latency
  • jitter
  • packet loss
  • upload speed
  • router quality
  • Wi-Fi congestion
  • voice traffic prioritisation
  • backup connectivity

Typical bandwidth guide:

Call type Bandwidth guide per concurrent call
Standard VoIP call Around 100 kbps
HD voice Around 150 kbps
Teams / UCaaS call 150-250 kbps
Video plus voice 500 kbps+

Bandwidth requirements scale with simultaneous calls, not total users.

Example:

10 concurrent calls × 150 kbps = around 1.5 Mbps of stable bandwidth.

Small teams can often use business broadband or FTTP.

Call-heavy teams, contact centres and multi-site businesses may need stronger connectivity, QoS, 4G/5G backup or a leased line.

 

how does voip work

 

Call quality requirements (jitter/latency/bandwidth)

Metric Good target
What happens when it is poor
Latency Under 150 ms
Delays, talk-over and awkward pauses
Jitter Under 30 ms
Choppy or robotic audio
Packet loss Below 1%
Missing words, distortion and dropped calls

Poor VoIP quality is often caused by the network rather than the VoIP provider alone.

Before switching, check:

  • broadband speed
  • upload stability
  • router quality
  • Wi-Fi coverage
  • Ethernet for desk phones
  • QoS settings
  • number of simultaneous calls
  • peak-time internet usage
  • backup connection options

 

When Is VoIP Worth It?

VoIP is worth comparing for most UK businesses, especially if you still use traditional phone lines, need remote working, want better call routing or are preparing for the PSTN switch-off, and it can help with:

  • flexible remote working
  • lower reliance on landlines
  • easier call routing
  • voicemail-to-email
  • call queues and auto-attendants
  • mobile and desktop calling
  • CRM integrations
  • call recording
  • easier user management
  • multi-site phone systems
  • scaling users up or down

However, savings are not guaranteed.

A simple hosted VoIP system can be cost-effective for small businesses, but advanced features such as call recording, contact centre tools, international bundles, CRM integrations, handsets and managed support can increase the monthly cost.

VoIP gives the best value when the package matches your actual call volume, user count, internet connection and feature needs.

Compare Business VoIP Quotes

Free quotes • No obligation • Compare UK providers

Get tailored quotes for your business

 

Who Should Use Business VoIP?

Business VoIP is ideal for:

  • small businesses replacing landlines
  • growing SMEs needing call routing
  • remote and hybrid teams
  • sales and support teams
  • multi-site businesses
  • companies using Microsoft 365
  • businesses preparing for digital phone lines

VoIP may be less suitable if your internet connection is unstable or your business needs a very complex contact centre setup without proper planning.

 

VoIP features that matter

Most businesses should focus on useful everyday features first.

Feature Who needs it?
Call forwarding Almost every business
Voicemail-to-email Small teams and remote workers
Auto-attendant Businesses wanting professional call routing
Call queues Support, sales and busy reception teams
Hunt groups Teams sharing incoming calls
Mobile app Remote and hybrid workers
Desktop softphone Staff working from laptops
Call recording Sales, support and regulated workflows
CRM integration Sales and customer service teams
Analytics and reporting Managers and call-heavy teams
Time-based routing Businesses with opening hours
International calling Businesses calling overseas
Number porting Businesses keeping existing numbers
999 address management All businesses using VoIP
Failover routing Businesses needing resilience

 

Not sure which provider fits your business?

Different VoIP providers suit different types of businesses.

Compare providers based on:

  • number of users
  • simultaneous calls
  • hosted VoIP vs SIP vs Teams Phone
  • call recording needs
  • CRM integration
  • Microsoft 365 usage
  • remote-working requirements
  • call queues and IVR
  • handsets or softphones
  • setup and number porting
  • contract length
  • support level
  • broadband readiness

Compare Business VoIP Providers

Free quotes • No obligation • Compare UK phone system providers

Get tailored quotes for your business

 

VoIP migration checklist

A smooth VoIP migration needs planning.

1. Audit your current phone setup

List:

  • landline numbers
  • ISDN lines
  • PBX equipment
  • fax lines
  • alarm lines
  • lift lines
  • door entry lines
  • payment terminal lines
  • call routing
  • voicemail setup
  • contract end dates

2. Confirm your users and call volume

Work out:

  • number of users
  • simultaneous calls
  • remote users
  • desk phone users
  • softphone users
  • call-heavy teams
  • call recording needs
  • international calling needs

3. Check internet and network readiness

Check:

  • broadband type
  • upload speed
  • router quality
  • Wi-Fi coverage
  • Ethernet availability
  • QoS
  • backup connectivity
  • whether a leased line is needed

4. Choose hosted VoIP, Teams Phone or SIP

Your setup depends on your current system and future needs.

  1. Replacing landlines: hosted VoIP or Teams Phone
  2. Already using Microsoft 365: Teams Phone may be worth comparing
  3. Keeping a PBX: SIP trunking
  4. Call-heavy team: advanced hosted VoIP or contact centre
  5. Multi-site business: managed cloud VoIP or SIP

5. Plan number porting

Do not cancel your old service until number porting is complete.

You will need:

  • Letter of Authority
  • proof of number ownership
  • correct billing details
  • list of numbers
  • temporary numbers
  • agreed port date

6. Configure call flows

Set up:

  • auto-attendants
  • opening hours
  • call queues
  • voicemail
  • hunt groups
  • call forwarding
  • out-of-hours routing
  • mobile failover
  • emergency address information

7. Test before go-live

Test:

  • inbound calls
  • outbound calls
  • internal transfers
  • voicemail
  • mobile apps
  • desktop apps
  • call quality at peak times
  • emergency location settings
  • failover routing

8. Train staff

Make sure users know how to:

  • answer calls
  • transfer calls
  • use voicemail
  • use apps
  • change presence
  • record calls if permitted
  • use headsets
  • report issues

 

VoIP security and compliance

VoIP can be secure, but the setup matters.

Check whether providers support:

  • encryption
  • secure admin access
  • multi-factor authentication
  • role-based permissions
  • call recording controls
  • audit logs
  • fraud monitoring
  • strong password policies
  • secure number porting
  • emergency services configuration
  • GDPR-supporting data processes
  • UK-based support if needed
  • call recording storage controls
  • retention settings
  • user offboarding

Businesses should also train staff to avoid phishing, password reuse and call fraud.

how to choose a voip system

 

How to choose a VoIP Provider in the UK

Essential factors:

  • Reliability & uptime- 99.9%+ SLA
  • Security -Encryption, compliance (GDPR)
  • Scalability -Add users/features easily
  • Support quality -24/7 helpdesk matters
  • Transparent pricing – Watch out for hidden add-ons
  • Feature-fit -Choose only what you need

 

How Much Does VoIP Cost?

 

Compare business VoIP providers

Once you know which type of system you need, the next step is to compare providers using the same specification.

Leading UK options include:

  • RingCentral;
  • 8×8;
  • Gamma Horizon;
  • Vodafone Business;
  • BT Cloud Voice;
  • bOnline;
  • Vonage;
  • Aircall;
  • Dialpad;
  • Microsoft Teams Phone.

Each provider suits a different type of organisation.

For example:

  • a small business may prioritise low pricing and simple setup;
  • a hybrid company may prioritise desktop and mobile applications;
  • a sales team may need CRM integration and call recording;
  • a multi-site company may prioritise resilience and managed support;
  • a Microsoft-based organisation may prefer Teams Phone.

See our complete Best Business VoIP Providers UK comparison for detailed pricing, features and recommendations.

Provider Best for Typical pricing Why businesses choose them Full review
Microsoft Teams Phone Microsoft 365 users £7-£15 per user / month Seamless Teams & Outlook integration, strong value, ideal for hybrid teams
View full review →
RingCentral Feature-rich VoIP £20-£35 per user / month Advanced call management, analytics, international calling
View full review →
Gamma Horizon UK SMEs £10-£25 per user / month Reliable UK network, reseller-friendly, scalable hosted PBX
View full review →
Vodafone Business VoIP Mobile-first teams £15-£30 per user / month VoIP bundled with mobile & connectivity, strong brand trust
View full review →
8×8 Data-driven teams £20-£40 per user / month Powerful reporting, call quality monitoring, global reach
View full review →
Aircall Sales & support teams £30-£50 per user / month CRM-centric VoIP, fast setup, ideal for call-heavy teams
View full review →

Not sure which VoIP provider fits your business?

Different VoIP platforms suit different needs, and we can help you find the perfect match.

👉 Compare all options side-by-side here:

We want to remind you that the best VoIP provider will change based on a company or individual’s needs, so be sure to run a full market comparison based on your specific needs with our handy comparison engine here. If your business uses VoIP, you’ll also benefit from a fast leased line connection, which we can also help with.

✅ Compare the Best VoIP Deals for Your Business:

Get a quote

 

Best VoIP system by business type

Business type Setup to compare first Why
Sole trader Basic hosted VoIP or mobile VoIP
Low cost and professional number
Small office Hosted VoIP
Simple migration from landlines
Remote team Hosted VoIP or Teams Phone
Mobile and desktop apps
Microsoft 365 business Teams Phone
Calls inside Teams
Sales team Hosted VoIP with CRM integration
Call recording, reporting and follow-ups
Support team Contact centre VoIP
Queues, routing and analytics
Multi-site business Managed cloud VoIP
Centralised routing and reporting
Existing PBX user SIP trunking
Keep existing phone system
Hotel Hosted VoIP or SIP with specialist features
Rooms, reception and internal calling
School Managed VoIP
Safeguarding, routing and resilience
Call centre Contact centre platform
Agent and supervisor tools

 

Business VoIP FAQs

What is a business VoIP phone system?

A business VoIP phone system lets companies make and receive calls over the internet instead of using traditional analogue phone lines.

How much does business VoIP cost in the UK?

Most UK business VoIP systems cost around £10-£30 per user per month, depending on provider, users, call bundles, support and features.

Is VoIP cheaper than traditional landlines?

VoIP can be cheaper than traditional landlines, but savings are not guaranteed. Costs depend on licences, call bundles, hardware, setup, broadband and optional features.

What is hosted VoIP?

Hosted VoIP is a cloud phone system managed by a provider. Businesses usually pay per user per month and access features such as voicemail, call routing, apps and call queues.

What is SIP trunking?

SIP trunking connects an existing PBX phone system to the internet and is often priced per channel, where each channel supports one simultaneous call.

What is Microsoft Teams Phone?

Microsoft Teams Phone adds external phone calling to Microsoft Teams. It can suit businesses already using Microsoft 365 and Teams every day.

What is the difference between hosted VoIP and SIP trunking?

Hosted VoIP gives you a full cloud phone system. SIP trunking connects an existing PBX to internet-based calling.

What is the difference between hosted VoIP and Teams Phone?

Hosted VoIP is a dedicated cloud phone system. Teams Phone adds business calling into Microsoft Teams and may need calling plans, direct routing or operator support.

Do I need special broadband for VoIP?

Not always. Small teams can often use business broadband or FTTP. Call-heavy teams may need stronger connectivity, QoS, backup broadband or a leased line.

What internet speed do I need for VoIP?

A standard VoIP call usually needs around 100 kbps per concurrent call. Allow extra capacity for other business internet use.

What causes poor VoIP call quality?

Common causes include high latency, jitter, packet loss, poor Wi-Fi, weak routers, overloaded broadband and lack of voice traffic prioritisation.

Can I keep my business phone number with VoIP?

Yes. Most VoIP providers support number porting, but you should not cancel your old service until the port is complete.

How long does VoIP number porting take?

Simple ports may take around 7-14 working days, but complex ports, multiple numbers or incorrect billing details can take longer.

Is VoIP suitable for remote and hybrid teams?

Yes. VoIP is well suited to remote and hybrid teams because staff can use mobile apps, desktop apps or softphones from different locations.

Is VoIP secure?

VoIP can be secure when configured properly with strong passwords, encryption, MFA, secure admin access, fraud monitoring and reputable providers.

Does VoIP work during an internet outage?

VoIP depends on internet and power, but businesses can use failover options such as call forwarding to mobiles, 4G/5G backup or secondary broadband.

Is VoIP replacing landlines in the UK?

Yes. The UK is moving from analogue phone lines to digital services, and the PSTN switch-off deadline is 31 January 2027.

Do I need VoIP before the PSTN switch-off?

If your business uses analogue landlines, ISDN or phone-line-dependent services, you should review digital alternatives before 31 January 2027.

Is VoIP good for call centres?

Yes, but call centres should compare contact-centre VoIP platforms with call recording, queues, analytics, CRM integration and supervisor tools.

Do I need new phones for VoIP?

Not always. Some businesses use softphones on laptops and mobiles. Others use VoIP desk phones, headsets or compatible existing devices.

 

Compare business VoIP phone systems

The best VoIP system depends on your users, call volumes, existing equipment and required features.

Comparing quotes can help you understand:

  • which system type suits your business;
  • how much each provider would charge;
  • what calls and features are included;
  • whether equipment or connectivity upgrades are required;
  • the total cost across the contract.

Compare hosted VoIP, Microsoft Teams Phone and SIP providers using one free comparison.

Get a quote

 

Related VoIP Guides & Resources

Compare VoIP Systems & Costs

  • https://compareyourbusinesscosts.co.uk/voip-service-uk
  • https://compareyourbusinesscosts.co.uk/hosted-voip-solutions
  • https://compareyourbusinesscosts.co.uk/office-telephone-systems
  • https://compareyourbusinesscosts.co.uk/business-phone-systems-24
  • https://compareyourbusinesscosts.co.uk/phone-systems-for-small-businesses
  • https://compareyourbusinesscosts.co.uk/cloud-pbx
  • https://compareyourbusinesscosts.co.uk/pbx-telephone-systems
  • https://compareyourbusinesscosts.co.uk/telephone-exchange-system
  • https://compareyourbusinesscosts.co.uk/sip-providers-in-the-uk

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VoIP Comparisons & Buying Decisions

  • https://compareyourbusinesscosts.co.uk/voip-vs-landline
  • https://compareyourbusinesscosts.co.uk/vonage-vs-ringcentral
  • https://compareyourbusinesscosts.co.uk/3cx-vs-ringcentral
  • https://compareyourbusinesscosts.co.uk/microsoft-teams-phone-vs-ringcentral
  • https://compareyourbusinesscosts.co.uk/dialpad-vs-ringcentral
  • https://compareyourbusinesscosts.co.uk/ringcentral-vs-zoom-phone

Best VoIP Systems by Use Case

  • https://compareyourbusinesscosts.co.uk/voip-for-remote-teams
  • https://compareyourbusinesscosts.co.uk/best-voip-for-call-centres
  • https://compareyourbusinesscosts.co.uk/voip-for-sales-teams
  • https://compareyourbusinesscosts.co.uk/voip-phone-systems-for-schools
  • https://compareyourbusinesscosts.co.uk/telephone-systems-for-hotels

VoIP Providers UK

  • https://compareyourbusinesscosts.co.uk/bt-cloud-voice
  • https://compareyourbusinesscosts.co.uk/vodafone-business-voip
  • https://compareyourbusinesscosts.co.uk/gamma-voip
  • https://compareyourbusinesscosts.co.uk/three-business-voip
  • https://compareyourbusinesscosts.co.uk/zen-voip
  • https://compareyourbusinesscosts.co.uk/colt-voip
  • https://compareyourbusinesscosts.co.uk/daisy-communications-voip
  • https://compareyourbusinesscosts.co.uk/spitfire-voip
  • https://compareyourbusinesscosts.co.uk/focus-group-voip
  • https://compareyourbusinesscosts.co.uk/redcentric-voip
  • https://compareyourbusinesscosts.co.uk/gradwell-communications-voip
  • https://compareyourbusinesscosts.co.uk/amvia-voip
  • https://compareyourbusinesscosts.co.uk/openreach-voip
  • https://compareyourbusinesscosts.co.uk/vaioni-business-voip
  • https://compareyourbusinesscosts.co.uk/radius-connect-voip
  • https://compareyourbusinesscosts.co.uk/community-fibre-voip
  • https://compareyourbusinesscosts.co.uk/aspire-voip
  • https://compareyourbusinesscosts.co.uk/xln-telecom
  • https://compareyourbusinesscosts.co.uk/4com

VoIP Software & Cloud Phone Platforms

  • https://compareyourbusinesscosts.co.uk/ring-central
  • https://compareyourbusinesscosts.co.uk/8×8-phone-systems
  • https://compareyourbusinesscosts.co.uk/3cx-phone-systems
  • https://compareyourbusinesscosts.co.uk/aircall
  • https://compareyourbusinesscosts.co.uk/vonage
  • https://compareyourbusinesscosts.co.uk/dialpad
  • https://compareyourbusinesscosts.co.uk/avaya
  • https://compareyourbusinesscosts.co.uk/cisco
  • https://compareyourbusinesscosts.co.uk/mitel-phone-systems
  • https://compareyourbusinesscosts.co.uk/grasshopper
  • https://compareyourbusinesscosts.co.uk/google-voice
  • https://compareyourbusinesscosts.co.uk/microsoft-teams-phone-system
  • https://compareyourbusinesscosts.co.uk/ringover-phone-systems
  • https://compareyourbusinesscosts.co.uk/nuacom
  • https://compareyourbusinesscosts.co.uk/hihi
  • https://compareyourbusinesscosts.co.uk/lily-comms
  • https://compareyourbusinesscosts.co.uk/goto-meeting

VoIP Features, Setup & Performance

  • https://compareyourbusinesscosts.co.uk/how-much-bandwidth
  • https://compareyourbusinesscosts.co.uk/voip-call-quality-uk
  • https://compareyourbusinesscosts.co.uk/acceptable-jitter-latency
  • https://compareyourbusinesscosts.co.uk/voip-for-mobile
  • https://compareyourbusinesscosts.co.uk/voip-with-video-conferencing
  • https://compareyourbusinesscosts.co.uk/10-voip-integrations
  • https://compareyourbusinesscosts.co.uk/ai-powered-voip
  • https://compareyourbusinesscosts.co.uk/is-zoom-a-voip
  • https://compareyourbusinesscosts.co.uk/private-line-services

VoIP Security & Compliance

  • https://compareyourbusinesscosts.co.uk/voip-security-checklist
  • https://compareyourbusinesscosts.co.uk/data-protection

VoIP Hardware & Equipment

  • https://compareyourbusinesscosts.co.uk/polycom-conference-phones
  • https://compareyourbusinesscosts.co.uk/dect-phone
  • https://compareyourbusinesscosts.co.uk/hands-free-telephone

VoIP FAQs & Help Guides

  • https://compareyourbusinesscosts.co.uk/voip-faqs
  • https://compareyourbusinesscosts.co.uk/virtual-conference-platforms

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James Ward
James Ward( CEO & Founder )

James Ward is the CEO & Founder of Compare Your Business Costs — a UK-verified comparison platform helping SMEs save money on business broadband, leased lines, phone systems, mobile telecoms, managed services and IT support. With over 10 years of experience in telecoms and technology procurement, James is a trusted UK business expert featured in national media and verified on Companies House.

compareyourbusinesscosts.co.uk/james-ward-cybc

Co Authors :

Ally Cox
Ally Cox( Blogger )

Hi, I’m Ally Cox, a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.
With 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.
Before joining CompareYourBusinessCosts, I worked across various industries, gaining hands-on experience in HR, copywriting, and business operations- from clocking-in systems to card machines and office technology.
My goal is simple: to help UK businesses make informed, confident decisions when choosing products and services that improve efficiency and save money.

compareyourbusinesscosts.co.uk/ally-cox-blogger-compareyourbusinesscosts-co-uk
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