Connectivity matters more than ever. We’re online, all the time - and the people and processes that are the backbone of your business rely on stable internet to stay connected.
Simply put, a leased line is a secure internet connection built purely for your business, so you don’t share bandwidth with other users. It’s also known as dedicated internet access, DIA or a dedicated leased line.
Business leased lines give you fixed, symmetrical bandwidth; keeping speeds consistent no matter the time of day and ensuring video calls, cloud backups and SaaS apps are lag-free.
A business might need a leased line for a number of reasons; they’re more reliable, more resilient and faster than broadband. In fact, we believe that any business aside from the very smallest of micro-SME will benefit from connecting through a dedicated leased line, rather than broadband.
This guide breaks down what leased lines are, how they work, what they cost and when they make sense.
Let’s get into the details. What exactly is a leased line connection?
A leased line is a dedicated, private connection between your business and your internet provider. Unlike broadband, the line is completely yours. You get dedicated bandwidth, without contention, so your internet speeds never drop at peak times.
Broadband connections, such as ADSL, VDSL or fibre-to-the-cabinet (FTTC), offer ‘up to’ certain speeds that are shared with other users, meaning actual performance can fluctuate. In contrast, leased lines provide a dedicated, symmetrical connection, delivering consistent speeds regardless of the time of day.
You might have heard other terms or variations like ‘internet leased line’, ‘dedicated leased line' or even ‘lease line’. They’re all referring to the same thing.
The benefits of leased lines include speed, reliability, scalability and better overall support for business applications. A real standout benefit, though, is the level of support you can expect with a leased line. As a business specific solution, leased lines are supported by stringent service level agreements (SLAs) that ensure minimal downtime and prioritised fixes.
While broadband is often more than enough for home use or for very small businesses with casual internet needs, leased lines are really the only option for any business requiring reliable, high-speed access for operations such as cloud services, large file transfers, video conferencing or hosting.
The big benefit and the main reason most businesses would benefit from a leased line is the genuinely business grade SLAs and available uptime.
With dedicated connectivity, there are fewer bandwidth variables, so providers can guarantee the bandwidth and uptime a business will get; and build robust SLAs around it.
The guaranteed uptime and 4-hour fix commitments are some of the biggest differences between standard broadband and a leased line.
While it’s now possible to get symmetrical, uncontended broadband services, they still typically can’t match the service guarantees, resilience and support levels that come with a dedicated leased line connection.
A leased line is a ‘point-to-point’ fibre connection directly linking your business to your internet service provider (ISP). As it’s completely dedicated to you, your ISP will install a direct line (often fibre-optic) from your building directly to their network.
And because the connection is dedicated, speeds are symmetrical. Uploads are as fast as downloads, which in real terms means your video calls, file sharing and cloud backups aren’t affected by other users sharing bandwidth outside your business. Leased lines are engineered to deliver the same speed in both directions, so if you pay for 100 Mbps, you get 100 Mbps both upstream and downstream. In a broadband connection, ISPs would typically prioritise download speeds, which is why - for businesses - the dedicated line and lack of contention is important.
So let’s look in a little more detail at that uncontended bandwidth. Think of contended broadband as a motorway with drivers sharing lanes; your speed depends on the traffic. Uncontended leased line bandwidth is like having your own private lane - you can drive at full speed anytime.
ISPs measure ‘contention ratios’ to determine how many other businesses or residences you’ll be sharing bandwidth with. A contention ratio shows how many users share the same bandwidth. The higher the ratio, the more likely broadband speeds will drop during peak times. Leased lines are uncontended (1:1), giving consistent, full-speed access at all times. Most standard broadband connections have contention ratios ranging from 20:1 to 50:1; so you can see why - if many users in your area are online at the same time - your ‘up to’ 100 Mbps speed might drop significantly.
Another term you might come across while looking for a business internet provider is ‘latency’. Latency refers to the delay between sending data and receiving a response. Essentially, it’s how quickly information travels across a network. Leased lines provide an ultra-low latency connection, so user experience feels more fluid and less frustrating; pages loads quickly, documents save and share rapidly and video calls don’t get stuck buffering
Different businesses might benefit from different kinds of leased line setups; let’s take a look at the main types of delivery methods businesses might use.
Fibre leased lines deliver fast, symmetrical, highly reliable connectivity using fibre-optic cables, ideal for bandwidth-intensive businesses needing stable performance. Commonly used by medium to large organisations, data-heavy teams and cloud-driven companies. Speeds scale from 10 Mbps up to 10 Gbps+.
Copper leased lines use older copper infrastructure, offering lower speeds and performance than fibre but still providing dedicated, uncontended connectivity. They’re suitable for small businesses with modest needs or areas lacking fibre availability. But be wary of the fact that copper lines are being rapidly phased out. The government has plans for a full fibre roll out to complete in the next few years, so copper leased lines are not a very future proofed option, and you might be hard pressed to find a provider that would install them.
Wireless leased lines deliver dedicated connectivity via point-to-point radio signals, ideal for rural, temporary or hard-to-reach locations. They’re often used by construction sites, pop up events and remote offices; basically any business needing fast or temporary deployment. They’re also a great choice for diverse backup for businesses looking for 100% uptime.
EFM provides dedicated symmetrical connectivity by bonding multiple copper or fibre pairs, offering a cost-effective leased line alternative for smaller businesses. Ideal for startups or offices needing reliable speeds without full fibre pricing. Scalability typically ranges from 2 Mbps to around 35–100 Mbps.
Speeds can vary significantly across leased line types. You’ll want to consider which connection type will best future-proof your business infrastructure based on both the speeds the connection can scale up to, and the future longevity of the connection type itself.
There’s a big difference between leased lines and broadband; even broadband that claims to be ‘built for business’ or ‘business grade’. Let’s start with a quick comparison of some key parameters across the two technologies.
Broadband varies because it uses shared infrastructure and can be affected by distance from the cabinet, peak-time congestion and local faults. Outages may last longer and performance often fluctuates.
Leased lines are extremely reliable due to the fact they’re dedicated solely to you. Performance is consistent, stable and guaranteed by strict - genuinely business-appropriate - SLAs. Latency, uptime and speed are far more predictable.'
Broadband is a contended connection; the bandwidth is shared with many other users. Speeds often drop at busy times, especially for uploads.
Leased lines are completely uncontended. You never share bandwidth, so speeds remain constant even during peak demand.
Broadband typically comes with standard support packages, sometimes the same level as residential. That means no guaranteed fix times, so it could take days to resolve faults.
Leased lines are genuinely business grade and come with appropriate, premium support. That includes guaranteed response and fix times, and the reassurance of providers that monitor lines proactively and prioritise repairs.
As we’ve mentioned, we believe that every business apart from the very smallest micro-SME can benefit from a leased line. Thanks to their in-built reliability, security and speed. There are certain businesses though that should be looking to upgrade to leased lines as a matter of course.
The high headcount: the more people that are on the network, the more strain it will face, and the more chance your people will end up facing the frustration of laggy calls and circle of doom downloads. A leased line is typically recommended for businesses with 10 or more users who rely on consistent, high-speed internet.
The cloud-native: the more your operations rely on the cloud, the more important it is to have the connectivity to support it. Most business users spend eight hours a day connected to workflow tools, collaborative design tools, video conferencing, VoIP and transfer tools; that’s without even considering any hosting infrastructure underneath it.
The multi-site: for businesses that need reliable, high-speed connections between sites, leased lines facilitate seamless collaboration and access to shared resources.
While broadband connections are mostly ‘plug and play’, built to support mass market users and shared connections, leased line connectivity is extremely versatile. With leased lines, configurations can be customised across single and multiple sites, so your business gets exactly the benefits it needs from the leased line.
These customisations can include things like routing (where you determine how traffic passes over your network), static IPs (to support hosting services or secure remote access) and VLANs (often used to isolate traffic between departments, improving security and performance).
As we’ve already covered, leased lines are significantly more reliable than other connection types. And this reliable performance is essential for modern business applications, where delays or dropouts can disrupt productivity.
Leased lines come with strong SLAs, which guarantee uptime, fault resolution protocols and priority support from the provider. And because the connection is dedicated to your business, security is intrinsically improved compared to shared broadband. Your connection has less exposure to congestion-related vulnerabilities or cyber threats.
While leased lines offer significant benefits, it’s worth noting a few considerations. They’re more expensive than standard broadband and installation can take longer, especially if fibre infrastructure isn’t already in place. For very small businesses with minimal internet demands, the cost may outweigh the benefits.
But for companies that rely on consistent, high-speed connectivity, secure data transfer and uninterrupted communication, these drawbacks are minor compared to the advantages.
For some real life applications and examples, read stories from our customers across sectors as diverse as logistics, retail, healthcare and finance to see how leased lines have benefitted their operations.
Different businesses might benefit from different kinds of leased line setups; let’s take a look at the main types of delivery methods businesses might use.
Start by evaluating your requirements. Consider the number of users, types of applications (cloud services, VoIP, video conferencing), locations and desired speeds you’ll need to accommodate. Leased lines can range from 10 Mbps to 10 Gbps+, so knowing your current and future needs will help determine the right package both for now and to scale with you.
Contact providers to request quotes. Many will (and should!) perform a site survey to assess your location, existing infrastructure and installation requirements. This ensures accurate pricing and realistic installation timelines.
Compare not just cost, but also contract length, SLA guarantees, scalability and support. A strong SLA ensures quick fault resolution, while scalability allows your line to grow as your business expands.
Once you select a provider, they’ll schedule installation. Fibre is usually preferred, but options like copper or wireless may be used depending on location. Installation typically involves laying or connecting the line and configuring your network. Activation usually follows within days to a few weeks, depending on infrastructure availability.
After activation, test your connection and monitor performance. Providers often offer monitoring tools to ensure speeds, uptime and latency meet expectations.
There are a number of elements that make leased lines a slightly more expensive solution than broadband, from bandwidth to custom infrastructure to planning fees. With average prices for 100Mb leased lines coming in at around £240 a month, cost can be an issue for smaller businesses. At Elevate, our leased line rates are around 18% less (conservatively) than average.
Other factors, unique to your business, will also be taken into consideration when your leased line provider is determining price point. They include:
Distance: the further your location is from the provider’s nearest point of presence (PoP), the higher the cost, as additional infrastructure is needed to make the connection.
Location: urban areas tend to have lower costs due to better-established infrastructure. Remote areas can incur higher charges due to longer installation routes.
Features: add-ons like backup lines, managed services or enhanced security can increase the overall price. Dedicated customer service can also ramp up costs, although that's not a factor at Elevate, as we offer this as standard.
Fees: in some locations, permits may be required to lay the leased line, which can contribute to the cost.
At Elevate, we’ve invested significantly in building wireless connectivity across our Hypercities. So if your business is based in London, Manchester, Leeds, Liverpool, Birmingham or Cardiff, you could get a leased line for less.
We offer a number of commercial options to fit needs. For example, our leased line contract options range from 1 day to 60 months, so you can find the right solution for everything from temporary events to office connectivity and connected buildings.
The installation of a wireless leased line costs considerably less than a fibre leased line because there are no excess construction charges (known as ECCs). There is a setup fee for your wireless leased line, which involves installing a receiver on your building and connecting to our nearest transmitter, but it’s typically a fraction of the price most fibre leased line providers would expect you to pay.
Once your leased line is installed, it’s important to verify that it is performing correctly and properly configured.
Start by checking the line is active. Your provider usually gives access to a management portal or dashboard, showing line status, bandwidth and uptime. You can also use speed test tools to verify upload and download speeds. Remember, leased lines are symmetrical, so your upload speed should match your download speed; a quick way to confirm it isn’t a standard broadband connection.
Unlike broadband, leased lines are uncontended and dedicated. You can check your public IP against your ISP documentation; leased lines often come with a static IP. Speed consistency and low latency are also indicators.
Setup involves connecting the leased line to a business router. Providers may offer managed services, where they configure and monitor the router for you, or unmanaged services, where your IT team handles setup.
Your leased line is backed by an SLA guaranteeing uptime and repair times. Use your provider’s dashboard to track performance and log any issues immediately to ensure SLA support.
So when does a business need a leased line? Simply put, when your operations, communications, and systems rely on a stable internet connection, ‘good enough most of the time’ isn't good enough. And that's all broadband can offer.
Slow or unreliable broadband; speeds slow down or fluctuate, causing delays in daily work.
VoIP or video call problems; dropped calls, lag, poor video quality and sound issues.
Heavy cloud reliance; uploading/downloading large files or using cloud apps slows down.
Multiple sites sharing data; offices or teams struggle with slow inter-site connectivity.
If you’re seeing any of these issues, consider upgrading to a leased line, for the dedicated, symmetrical speeds, reliable performance and enhanced security to keep things running smoothly.
Our installation is typically completed in 10–20 days. With Preconnect, we can get you online in as little as 48 hours.
Generally speaking, yes. The very highest tier broadband may offer comparable speeds to leased lines; but leased lines also offer much reliability, consistency and security.
A leased line is a dedicated, high-speed internet connection built exclusively for your business. Your bandwidth isn't shared with other users, so your speed is consistent at all times.
The first step is to use your ISP’s dashboard or portal, which usually displays current throughput, latency, packet loss and uptime. These tools provide a reliable way to confirm the line is performing as expected. You can also use independent speed test websites like Speedtest by Ookla, nPerf, or Fast.com, running multiple tests at different times of day to ensure consistency.
For more precise measurements, IT teams can use local network testing tools to test speeds between the router and internal servers, ensuring internal hardware isn’t limiting performance. Results should be documented and compared against the agreed SLAs. If speeds or reliability fall below guaranteed levels, your provider is obligated to address issues.
Leased lines are a more expensive internet access option than plain old broadband. But, they are also the only type of connectivity suitable for business, and certainly worth the increased price tag if you’re looking for reliability, speed and service that are suitable for your business’ needs.
Average prices for 100Mb leased lines come in at around £233.33 / month in London and £248.50 / month in Manchester. At Elevate, our leased line rates are around 18% less (conservatively) than that average.
Yes, leased lines typically include one or more static IP addresses as part of the service. Unlike dynamic IPs, which can change periodically, static IPs remain constant, essential for many business applications.
In the UK, several providers dominate the leased line market. Some provide national coverage, some are stronger in city areas. Some have focused specifically on expanding reach to remote areas. Some focus on customer needs by business size. Most offer dedicated leased lines through full fibre infrastructure.
At Elevate, we’ve emerged as a reliable, modern and service-driven option, offering both fibre and wireless leased lines with speeds up to 10 Gbps. Because we’ve built our own networks and have our own engineers, we handle installation, monitoring and support - so you get rapid deployment and strong SLAs, particularly in our Hypercities.
We only sell leased lines, because broadband simply doesn't meet the performance standards businesses need. Broadband is fundamentally a consumer-grade service, built for casual use, not for the demands of business-critical applications. It lacks the guarantees, consistency, and reliability that modern businesses depend on.
A leased line delivers dedicated, uncontended, and symmetrical internet with consistent high speeds, low latency, and strong reliability. Businesses benefit from predictable performance for VoIP, video conferencing, cloud services, large file transfers and all the other cloud-dependent systems and processes businesses rely on today.
While costs are higher than standard broadband, ROI comes from reduced downtime, fewer slowdowns, and enhanced productivity. With robust SLAs and dedicated support, a leased line ensures critical operations run smoothly, making it an investment that directly supports business continuity, efficiency, and growth. For companies relying on constant connectivity, it’s not an expense, it’s a strategic choice.
If you’re ready to explore how a leased line could strengthen your business connectivity, get in touch with Elevate to find the right setup for you.
