Best UK Leased Line Providers 2026 | Compare Prices, SLAs & Quotes Quick Answer
The best leased line provider depends heavily on your business postcode, required speed, fibre availability, SLA, installation route, resilience requirements and budget.
UK businesses commonly compare providers including:
BTnet Virgin Media Business TalkTalk Business Zen Internet Spitfire Daisy Communications Colt Vodafone Business regional and specialist fibre providers
There is no provider that is cheapest or best at every UK address. A provider with fibre close to your premises may be able to offer a substantially better installation route or price than another national supplier.
Provider Worth comparing for Current published signal
BTnet
Strong SLA and established UK business connectivity
100% availability SLA; 5-hour target fix
Virgin Media Business
Competitive DIA where its network is available
100Mbps DIA currently advertised from £185/month
TalkTalk Business
SMEs comparing SLA, managed networking and high speeds
Up to 10Gbps; 99.995% uptime; 4-hour maximum fix
Zen Internet
SMEs prioritising support and resilience options
99.9% uptime standard; 100% resilience option
Spitfire
Businesses wanting transparent published prices and technical SLAs
100Mbps currently from £139/month; 1Gbps from £203/month
The headline monthly price is only part of the decision. Compare installation, excess construction charges, wayleaves, router management, resilience, service credits and total contract cost before signing.
Compare leased line provider quotes →
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: September 2026
Leased Line Cost Calculator UK Estimate your monthly leased line cost, annual spend, total contract value and whether dedicated internet is likely to be worth comparing for your business.
Required leased line speed
100Mbps 200Mbps 500Mbps 1Gbps 2Gbps 10Gbps Choose the committed speed your business needs.
Bearer size
100Mbps bearer 1Gbps bearer 10Gbps bearer A larger bearer can make future speed upgrades easier.
Business usage
Standard office use VoIP, video calls and cloud software Heavy uploads, backups or large files Critical operations / cannot trade offline Enterprise, data-heavy or multi-site Higher usage may increase recommended resilience and speed.
Location type
City / strong network availability Town / mixed availability Rural / limited availability Business park / complex install Leased line pricing is highly postcode-specific.
Contract length
12 months 24 months 36 months 60 months Longer contracts usually reduce the monthly price.
Resilience requirement
No extra resilience 4G/5G or broadband backup Diverse backup circuit Useful if downtime would stop trading.
SLA requirement
Standard business SLA Enhanced SLA / faster fix Critical SLA / maximum uptime focus Higher SLA expectations can affect provider choice.
Your estimated leased line cost
Estimated monthly cost
£0
Estimated cost per Mbps
£0
Recommended option
Leased line
Difference vs broadband
£0
Enter your details to estimate your leased line cost.
Recommendation will appear here.
This calculator is an estimate only. Actual leased line costs vary by postcode, network availability, bearer size, contract length, installation, excess construction charges, SLA, resilience, provider and survey results.
Key Takeaways
Leased line prices are highly postcode-specific.
BTnet currently advertises a 100% availability SLA and 5-hour target fix time.
Virgin Media Business currently advertises 100Mbps DIA from £185/month where available.
TalkTalk Business currently advertises up to 10Gbps, 99.995% uptime and a 4-hour maximum fix time.
Zen currently provides a 99.9% uptime SLA as standard with a 100% resilience option.
Spitfire currently publishes 100Mbps leased lines from £139/month and 1Gbps from £203/month.
Installation route and excess construction charges can matter as much as monthly rental.
Businesses that cannot tolerate downtime should compare resilience as well as the primary leased line.
Smaller businesses with less critical connectivity requirements should compare FTTP/business broadband before committing to a leased line.
Best UK Leased Line Providers Compared
Provider Worth comparing for Speed / service positioning SLA / resilience signal What to check
BTnet Businesses prioritising SLA and national provider scale
Dedicated symmetrical connectivity up to 10Gbps
100% availability SLA; 5-hour target fix
Quote, installation, bearer, router and resilience options
Virgin Media Business Sites within Virgin’s business fibre footprint
DIA from 100Mbps with symmetrical speeds
Dedicated business connectivity
Exact network availability and installation charges
TalkTalk Business
SMEs wanting competitive DIA and managed options
Symmetrical leased lines up to 10Gbps
99.995% uptime; 4-hour maximum fix
Router, security, resilience and contract offer
Zen Internet Businesses prioritising support and resilience
Dedicated symmetrical connectivity up to 10Gbps
99.9% standard; 100% with resilience
Service tier, hardware and resilience cost
Spitfire SMEs wanting engineering-led connectivity and published prices
100Mbps to 10Gbps
100% uptime target; 5-hour fix target
Availability, install route and resilient-build options
Daisy Communications SMEs wanting connectivity bundled with managed communications
Business connectivity and managed services
Service dependent
Underlying network, support model and bundled contract
Colt Enterprise, major urban and international requirements
Enterprise fibre and network services
Enterprise service options
On-net coverage and wider network requirement
Vodafone Business
Businesses combining fixed and mobile connectivity
Business fixed-network services
Useful to compare for resilience strategies
Availability, backup design and SLA
Provider availability and pricing should always be checked for the exact business address.
BTnet Leased Lines BTnet is worth comparing where service guarantees and an established national business provider are priorities.
BT currently advertises:
dedicated, uncontended connectivity
symmetrical speeds up to 10Gbps
a 100% availability SLA
a 5-hour target fix time
managed Cisco and Meraki router options
resilience options
BT also states that its UK network latency SLA is a maximum of 20ms, great for businesses where downtime carries a significant operational cost, although the actual commercial comparison still depends on your site-specific quote.
See our BT leased line guide for more detail.
Virgin Media Business Leased Lines Virgin Media Business calls its dedicated service Dedicated Internet Access (DIA), and they currently advertise:
symmetrical upload and download speeds
speeds up to 10Gbps
100Mbps DIA from £185/month
The £185 price is subject to service availability and contract terms, and installation charges can apply.
Virgin Media Business is therefore particularly worth comparing where its own fibre network is close to your premises.
See our Virgin Media leased line guide .
TalkTalk Business Leased Lines TalkTalk Business currently advertises dedicated symmetrical connectivity at speeds up to 10Gbps, and their leased-line proposition currently includes:
99.995% uptime
a 4-hour maximum fix time
24/7 UK support
1Gbps bearer as standard
10Gb bearer options
optional managed routers and security
TalkTalk Business is worth comparing for SMEs where both dedicated connectivity and managed-network options are relevant.
Zen Internet Leased Lines Zen currently offers several Ethernet service tiers ranging from an entry-level Ethernet Light product to dedicated 10Gbps connectivity and they advertise:
99.9% uptime SLA as standard
a 100% resilience option
symmetrical speeds up to 10Gbps
Cisco and Fortinet router/firewall options
24/7 proactive monitoring
Zen is therefore worth comparing where service support and resilience are high priorities.
Spitfire Leased Lines Spitfire’s current advertised packages include:
100Mbps from £139/month 1Gbps from £203/month speeds up to 10Gbps
100% uptime target
5-hour fix target
24/7 support
standard, protected and diversely routed resilience options
These remain subject to availability and contract conditions, but they provide a useful public benchmark when comparing postcode-specific quotes.
What Does a Leased Line Cost? As a broad UK guide:
Speed
Indicative monthly cost
100Mbps
Approximately £140–£300+
500Mbps
Approximately £200–£600+
1Gbps
Approximately £200–£800+
10Gbps
Often £1,000+ depending on location and network
These figures are only comparison ranges. Actual prices depend heavily on network availability and installation.
For detailed pricing rather than provider selection, see our leased line cost guide .
Why Does Leased Line Pricing Vary by Postcode? A leased line is not priced like an ordinary off-the-shelf broadband package.
The provider needs to understand:
where your premises are
which fibre networks are nearby
whether new fibre needs building
the required speed
bearer size
building access
contract length
Two otherwise identical 1Gbps leased lines can therefore have very different prices at two addresses.
This is why postcode-level provider comparison is more useful than simply finding the provider with the lowest national advertised price.
What Should You Compare Between Leased Line Providers?
Factor Why it matters
Monthly rental
Determines ongoing connectivity cost
Installation
May materially affect first-year cost
ECCs
Extra construction can make a cheap quote expensive
Speed
Should match current and expected demand
Bearer
Determines future upgrade capacity
Availability SLA
Defines provider availability commitments
Fix target
Important when downtime affects trading
Service credits
Explains what happens when SLA commitments are missed
Router
Changes support responsibility and management
Resilience
Reduces dependence on a single circuit
Contract length
Affects both pricing and flexibility
Support
Particularly important for critical connectivity
What Is a Leased Line SLA? A Service Level Agreement defines performance commitments associated with the circuit so depending on the provider, this can cover:
availability
fault repair
latency
packet loss
installation commitments
service credits
Do not compare percentages without checking the actual terms.
For example:
BTnet currently advertises a 100% availability SLA and 5-hour target fix.
TalkTalk Business currently advertises 99.995% uptime and a 4-hour maximum fix.
Zen currently advertises 99.9% as standard with 100% available through resilience.
Spitfire currently advertises a 100% uptime target and 5-hour fix target.
The exact service-credit and exclusion terms still matter.
Which Leased Line Provider Is Best for VoIP? You do not need a specific leased line brand simply because you use VoIP.
For voice-heavy businesses, prioritise:
stable latency
low jitter
low packet loss
sufficient bandwidth
appropriate QoS
fast fault response
resilience
Spitfire, for example, currently publishes specific latency, jitter and packet-loss performance targets on its leased-line service, while BTnet includes network latency within its SLA.
If your main problem is VoIP performance rather than choosing connectivity, see our VoIP call quality guide .
Which Leased Line Provider Is Best for Small Businesses? There is no single SME winner, so you should compare providers such as:
TalkTalk Business
Zen
Spitfire
BTnet
Daisy
Virgin Media Business
local fibre providers
The cheapest provider can vary dramatically by postcode.
A strong local network route may be more valuable than choosing a nationally recognisable brand.
Which Provider Is Best for Enterprise Leased Lines? Larger businesses and multi-site organisations may need more than one dedicated internet circuit.
Relevant providers can include:
BT
Colt
Vodafone
Virgin Media Business
managed network specialists
The buying decision may also need to include SD-WAN , managed WAN or private-network services rather than treating each internet circuit independently.
Do You Need a Managed Leased Line?
Option Best suited to
Managed leased line
Businesses wanting the provider to manage router/connectivity
Wires-only / unmanaged
Businesses with their own IT team or MSP
Managed security
Businesses wanting firewall/security support included
Leased line + SD-WAN
Multi-site organisations
Before comparing price, establish who will be responsible for the router, firewall, configuration and fault diagnosis.
What Are Excess Construction Charges? Excess construction charges, or ECCs , are additional costs that can arise when extra engineering work is required to connect your site.
They can result from:
new ducting
blocked ducts
roadworks
complex building access
long fibre routes
private land
A low initial monthly quote can become much less attractive if significant ECCs appear after survey.
For more detail, see our leased line installation guide .
What Is a Wayleave? A wayleave is permission allowing telecoms infrastructure to be installed across or within land or buildings owned by another party and commonly matters where:
your business rents its premises
fibre needs to cross common areas
a landlord or freeholder must approve work
Wayleave delays can affect installation dates, so start the process early if one is likely to be required.
Should You Choose a Leased Line or Business Broadband?
Business broadband / FTTP Leased line
Cost
Lower
Higher
Bandwidth
Shared service
Dedicated
Upload/download
Can be asymmetric
Symmetrical
SLA
Usually weaker
Business-grade SLA
Installation
Usually faster
Can take considerably longer
Best for
Standard SME connectivity
Critical connectivity and demanding workloads
A smaller business with good full fibre should not automatically buy a leased line, and a leased line becomes more compelling where downtime, slow uploads, congestion or weak service guarantees create a meaningful business risk.
Questions to Ask a Leased Line Provider
What is the full monthly rental?
Is installation included?
Could excess construction charges apply?
What bearer size is included?
Can we upgrade speed during the contract?
What availability SLA applies?
What is the fault-fix target?
What service credits apply?
Is the router included and managed?
Can we use our own firewall?
What resilience options are available?
Is the backup circuit physically diverse?
What is the minimum contract term?
Are there annual price increases?
What is the expected installation date?
Will a wayleave be required?
Our Verdict: Which Leased Line Provider Is Best? There is no single best leased line provider for every UK business because the physical network route to your premises has such a large effect on cost and installation.
Based on current published information:
BTnet is worth comparing where a strong national SLA and managed options matter.Virgin Media Business is particularly relevant where its own network is available.TalkTalk Business is worth comparing for SMEs looking at dedicated connectivity and managed-network services.Zen is relevant where support and resilience options are priorities.Spitfire is particularly useful as a price comparison because it currently publishes clear 100Mbps and 1Gbps starting prices.Colt and other enterprise network providers become more relevant for complex and multi-site requirements.
The best approach is to compare several providers using the same postcode, speed, SLA and resilience requirement .
Free quotes • No obligation • Compare UK dedicated internet providers
Frequently Asked Questions Who are the best leased line providers in the UK?
Major providers worth comparing include BTnet, Virgin Media Business, TalkTalk Business, Zen, Spitfire, Daisy, Colt and Vodafone, alongside regional fibre specialists. The best option depends heavily on your postcode.
Which leased line provider is cheapest?
There is no universally cheapest provider because pricing depends on network availability and installation route. Spitfire currently publishes 100Mbps from £139/month, while Virgin Media Business advertises 100Mbps DIA from £185/month, subject to availability and terms.
How much does a 100Mbps leased line cost?
A 100Mbps leased line can broadly cost around £140-£300+ per month. Actual prices vary by postcode, installation and provider.
How much does a 1Gbps leased line cost?
1Gbps leased lines can broadly cost around £200-£800+ per month, although network availability and installation can materially change the quote.
Which leased line provider has the best SLA?
Do not choose based on the headline availability figure alone. BTnet currently advertises a 100% availability SLA and 5-hour target fix, TalkTalk Business advertises 99.995% uptime and a 4-hour maximum fix, while other providers offer different resilience and service-credit structures.
Is BTnet a good leased line provider?
BTnet is worth comparing where national network scale, dedicated bandwidth, a 100% availability SLA and managed options are important.
Is Virgin Media Business good for leased lines?
Virgin Media Business is particularly worth comparing where its DIA network is available. It currently advertises 100Mbps symmetrical DIA from £185/month.
Is TalkTalk Business good for leased lines?
TalkTalk Business is worth comparing for SMEs and larger businesses. It currently advertises up to 10Gbps, 99.995% uptime and a 4-hour maximum fix time.
Is Zen good for leased lines?
Zen is worth comparing where support and resilience are important. It currently advertises 99.9% uptime as standard with a 100% resilience option.
What are excess construction charges?
ECCs are additional engineering costs that can arise when extra work is needed to connect your premises, such as new ducts, roadworks or complex fibre routing.
How long does leased line installation take?
Installation can take weeks or months depending on the existing network, survey, wayleaves, civil engineering and excess construction requirements.
Should I compare leased line providers by postcode?
Yes. Exact location is one of the biggest factors affecting provider availability, installation route and monthly cost.
Is a leased line better for VoIP?
A leased line can provide dedicated symmetrical bandwidth and strong service guarantees, which can be valuable for call-heavy businesses. However, many smaller VoIP deployments work well over stable FTTP or business broadband.
Related Leased Line Guides
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.
