Business broadband is suitable for many small organisations, while a leased line is designed for businesses that require dedicated capacity, symmetrical speeds and stronger service commitments. The right choice depends less on headline speed and more on how severely an outage or inconsistent connection would affect your operations.
A fast Full Fibre broadband connection may comfortably support cloud applications, video meetings and everyday office activity. A leased line becomes more attractive when connectivity is business-critical, upload demand is high or predictable performance matters more than keeping the monthly cost as low as possible.
Business broadband vs leased line at a glance
| Feature | Business broadband | Leased line |
|---|---|---|
| Connection type | Standard broadband service | Dedicated point-to-point Ethernet connection |
| Download and upload speeds | Often faster download than upload | Normally symmetrical |
| Capacity | Not reserved exclusively for one customer | Sole-use connection for the customer |
| Performance | Suitable for many normal business workloads | More predictable for business-critical workloads |
| Service levels | Depends on the provider and package | Usually supplied with enhanced service commitments |
| Installation | Usually simpler where service is available | May require surveying, construction and a longer lead time |
| Cost | Generally lower | Generally higher |
| Best suited to | Small offices and normal cloud usage | Businesses where connectivity failure would cause serious disruption |
These are general differences. Exact speeds, service levels, installation arrangements and contract terms vary between providers.
What is business broadband?
Business broadband is an internet service sold for commercial use. It may use Full Fibre, Fibre to the Cabinet or another access technology, depending on what is available at the premises.
Business packages may offer advantages over residential broadband, including:
- Business-focused technical support
- A static IP address
- Different router and firewall options
- Higher upload speeds on selected products
- Improved fault-response options
- Minimum guaranteed speed commitments from participating providers
Modern Full Fibre broadband, also known as Fibre to the Premises or FTTP, uses fibre optic cable all the way to the premises. This avoids the final copper section used by older Fibre to the Cabinet connections.
Openreach currently advertises business Full Fibre packages capable of download speeds of up to 1Gbps and upload speeds of up to 220Mbps. Availability and the packages offered to customers depend on the chosen internet service provider.
You can read more in Openreach’s guide to Full Fibre broadband for business.
What is a leased line?
A leased line is a dedicated business connection, commonly delivered using Ethernet over fibre.
Unlike standard broadband, the point-to-point connection is provided for the sole use of the customer. It normally delivers the same capacity in both directions, known as symmetrical bandwidth.
For example, a 500Mbps leased line would normally provide up to 500Mbps for downloads and 500Mbps for uploads.
A leased line may also be described as:
- Ethernet Access Direct
- Ethernet over fibre
- Dedicated Internet Access
- Business Ethernet
- A dedicated fibre circuit
The precise product and network design vary, so quotations should be compared carefully rather than assuming every service described as a leased line is identical.
Openreach describes its Ethernet service as a dedicated, sole-use connection with symmetrical upload and download speeds. See its overview of broadband and Ethernet services for businesses.
The main differences between business broadband and a leased line
Dedicated capacity
A leased line provides a dedicated point-to-point connection for the customer. Standard broadband does not reserve an equivalent sole-use circuit exclusively for one organisation.
This does not mean that Full Fibre broadband is automatically slow or unreliable. It means the service is designed and sold differently from a dedicated Ethernet circuit.
Download and upload speeds
Standard broadband products are commonly asymmetrical: their download speed is higher than their upload speed.
This works well for many businesses because employees often download more information than they upload. However, upload capacity becomes increasingly important when the organisation regularly:
- Sends large design, media or project files
- Backs up data to the cloud
- Hosts services at its premises
- Uses cloud-based telephone systems
- Runs frequent video meetings
- Synchronises substantial amounts of data
- Provides remote access to on-site systems
A leased line’s symmetrical capacity can therefore be more valuable than a higher headline download speed with limited upload performance.
Service levels and fault response
Business broadband packages offer different levels of technical support. Some include improved response targets, while others remain closer to residential support arrangements.
Leased lines are normally purchased with stronger contractual service levels because they are intended for organisations that depend heavily on connectivity.
Before selecting either service, ask:
- Is support available 24 hours a day?
- How quickly must the provider acknowledge a fault?
- What is the contractual repair target?
- Are weekends and public holidays included?
- Does the service level provide compensation or service credits?
- Who manages communication during a major outage?
- Is an alternative connection included while repairs take place?
Do not rely only on phrases such as “business support” or “priority repair”. Check the actual contractual commitments.
Minimum guaranteed speeds
A broadband package may be advertised using an “up to” speed, but the actual performance available at the premises can differ.
Ask the provider for:
- The estimated download and upload speeds
- The minimum guaranteed download speed
- What remedy applies if the service falls below that level
- Whether the provider participates in Ofcom’s broadband speed code
Ofcom’s voluntary broadband speed codes include a right to leave a contract without penalty where the provider cannot resolve speeds that remain below the promised minimum, subject to the relevant terms.
See Ofcom’s information on minimum guaranteed broadband speeds and exit rights.
Installation time
Business broadband can often be installed relatively quickly where a suitable service already reaches the premises.
A leased line usually requires a survey and may need new fibre, ducting, permissions or construction work. Installation can therefore take considerably longer.
Before committing to a move, new office or contract end date, confirm:
- The estimated installation lead time
- Whether a survey is required
- Whether landlord or wayleave permission is needed
- Whether additional construction charges may apply
- What temporary connectivity will be provided
- Whether the existing service should remain active during installation
Do not cancel an existing connection until the replacement has been installed, tested and confirmed ready for business use.
Cost and contract length
Business broadband is generally the less expensive option. Leased-line pricing reflects the dedicated circuit, service commitments and installation work that may be required.
Prices vary significantly according to:
- Premises location
- Required bandwidth
- Available network infrastructure
- Construction requirements
- Contract term
- Service levels
- Whether resilience or a backup connection is included
Compare the complete contract cost rather than only the monthly rental. Installation charges, routers, firewalls, support, excess construction and early termination terms may all affect the total.
When is business broadband sufficient?
A good Full Fibre business broadband service may be sufficient where:
- The organisation has a relatively small number of users
- Most activity involves email, web browsing and ordinary cloud applications
- Upload demand is moderate
- A short interruption would be inconvenient rather than critical
- A separate 4G, 5G or second broadband connection provides acceptable failover
- The provider offers an appropriate business support package
- The connection meets the organisation’s measured peak usage
For many small businesses, investing in reliable Full Fibre broadband plus a separate backup connection can be more appropriate than purchasing a leased line immediately.
When should a business consider a leased line?
A leased line is worth considering where:
- The internet connection is essential to almost every business process
- An outage would stop employees working or customers being served
- The organisation uses cloud-based telephone systems extensively
- Large uploads and file transfers are routine
- Upload performance is as important as download performance
- The premises supports a large number of simultaneous users
- Services are hosted at the premises
- Remote employees depend on systems located at the site
- Predictable capacity and latency are important
- Stronger contractual service levels are required
- Customers or contracts require a particular connectivity standard
The commercial question is not simply whether the leased line costs more. It is whether the cost of inadequate connectivity or an extended outage would be greater.
A leased line is not automatically a resilient connection
A dedicated leased line can still fail. Fibre can be damaged, local equipment can lose power and provider infrastructure can experience faults.
Businesses that cannot tolerate losing internet access should consider a separate failover connection.
Possible resilience options include:
- A second Full Fibre broadband connection
- A second leased line
- A connection supplied over a different network
- 4G or 5G mobile failover
- Satellite connectivity for hard-to-reach locations
The backup route should ideally avoid relying on exactly the same cable, duct, network equipment and power supply as the primary connection.
Automatic failover should also be tested. A backup connection provides little reassurance if nobody knows whether the firewall will switch to it correctly during an outage.
Do you need a leased line for cloud telephony?
Not necessarily. Cloud telephone systems can work well over a suitably designed business broadband connection.
The organisation should assess:
- Available upload and download bandwidth
- Latency and connection stability
- The number of simultaneous calls
- Other traffic competing for bandwidth
- Router and firewall configuration
- Quality-of-service settings
- What happens to calls during an internet outage
A leased line may improve predictability for heavily used cloud telephony, but resilience and network configuration remain important whichever connection is chosen.
How much bandwidth does your business need?
User count alone is not enough to determine the correct speed.
Review what employees actually do, including:
- Video conferencing
- Cloud applications
- Large file transfers
- Online backup
- Voice over IP calls
- Remote desktop and virtual desktops
- Guest Wi-Fi
- Security cameras and connected equipment
- Software updates and device management
Measure current utilisation during busy periods and allow capacity for growth. The connection should not operate permanently close to its maximum, because short periods of increased demand could then cause poor performance.
Upload usage should be assessed separately rather than assuming that a large download figure solves every performance problem.
Questions to ask before signing a connectivity contract
- What download and upload speeds will the service provide?
- Are the speeds symmetrical?
- Is the capacity dedicated to our business?
- What minimum speed is contractually guaranteed?
- What are the support hours and repair targets?
- What installation work is required?
- Could excess construction charges apply?
- What is the estimated installation date?
- What equipment is included?
- Does the service include a managed router or firewall?
- What backup or failover connection is provided?
- How is failover tested?
- What is the minimum contract term?
- What are the early termination conditions?
- Can the bandwidth be increased during the contract?
How Secure IT can help
Secure IT can help businesses assess connectivity requirements, compare available services and plan the network, firewall, Wi-Fi and failover arrangements around the chosen connection.
The review should consider current usage, future growth, cloud services, telephony, remote working, site layout and the operational cost of losing connectivity.
For a wider overview of ongoing technology management, read our guide to what managed IT support includes.
Contact the Secure IT team to discuss business broadband, leased lines, connectivity resilience or cloud telephony.
Frequently asked questions
Is Full Fibre broadband the same as a leased line?
No. Both can use fibre optic infrastructure, but standard Full Fibre broadband and a dedicated Ethernet leased line are different commercial and technical services. A leased line provides a sole-use point-to-point connection and normally symmetrical speeds.
Is a leased line faster than business broadband?
Not in every comparison. A Full Fibre broadband package may advertise a higher download speed than a lower-bandwidth leased line. The leased line’s advantages are dedicated capacity, symmetrical performance and stronger service commitments rather than the headline download figure alone.
Can a small business use a leased line?
Yes. Business size is not the only consideration. A small organisation may justify a leased line if internet access is essential to its operations or if it regularly transfers large quantities of data.
Does a leased line guarantee that the internet will never fail?
No. It can provide a more controlled service with stronger repair commitments, but circuits and equipment can still fail. Businesses requiring continuous connectivity should have a separate resilience plan.
Can 4G or 5G replace a leased line?
Mobile connectivity can be useful as a primary service in some locations or as temporary and backup connectivity. Performance depends on coverage, signal quality, network demand and data allowances, so it should be tested at the premises.
Choose connectivity according to business impact
A leased line is not automatically necessary simply because a business uses cloud services. Equally, the cheapest broadband package may be a false economy where an outage would stop the organisation operating.
Assess speed, upload demand, service levels, resilience and the financial impact of downtime. The best connection is the one that supports the way the business actually works and has a realistic recovery plan when something fails.
