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Leased Line for Business Your Complete Guide to UK Connectivity

  • Tim Garratt
  • December 17, 2025
  • 9:49 am

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A leased line for business is a private, dedicated internet connection that you rent directly from a provider. The best way to think of it is like having your own exclusive motorway to the internet—no traffic jams, no sharing with other users, just a guaranteed speed limit in both directions.

What Is a Leased Line and Is It Right for Your Business

Modern building showcasing 'DEDICATED CONNECTION' text, a yellow cable, and a woman working on a laptop.

Standard business broadband is more like a busy public A-road. Your connection speed gets squeezed by how many other businesses in your area are online at the same time. During peak hours, this shared network can lead to slowdowns, choppy video calls, and frustratingly slow cloud uploads.

A leased line gets rid of these common headaches by giving you a private, uncontended fibre optic connection that’s exclusively yours. This means the performance you pay for is exactly what you get, 24/7.

The connection is also symmetrical, so you get equally fast upload and download speeds. This is a game-changer for modern businesses that depend on cloud-based software, VoIP phone systems, and shifting large files around.

Who Truly Benefits From This Investment

A leased line for business isn't a one-size-fits-all solution, but it’s an essential investment for any organisation that simply can't afford internet downtime or patchy performance. If your day-to-day operations rely on a rock-solid, fast connection, a leased line is almost certainly the right move.

Ask yourself if your business deals with any of these:

  • Critical Cloud Applications: You use tools like Microsoft 365, Salesforce, or other cloud software where any slowdown kills productivity.
  • Frequent Video Conferencing: Your team needs smooth, high-quality video calls with clients and colleagues, free from buffering or dropouts.
  • Large File Transfers: You regularly send or receive big files, like design proofs, video footage, or data backups.
  • VoIP Phone Systems: Your entire business phone system runs over the internet, and you can't risk poor call quality.

A leased line is more than just an internet connection; it's a business utility. It provides the digital foundation for predictable performance, making sure your internet is a reliable tool for growth, not a source of daily frustration.

The real value is in that guaranteed reliability. While it's easy to find information on standard landline and broadband packages, a leased line is built specifically for businesses where connectivity is mission-critical. It's the go-to solution for any company that sees its internet connection as being just as vital as its electricity supply.

What Are the Real Business Benefits of a Dedicated Connection?

Two people viewing a video conference on a monitor with "Guaranteed Performance" text overlay.

Opting for a leased line is about more than just a speed boost. It's an investment in a predictable, guaranteed utility for your business. This dedicated connection turns your internet from a potential headache into a rock-solid asset, and it all starts with its powerful symmetrical speeds.

Unlike standard broadband, which almost always prioritises download speed over upload speed, a leased line delivers the same high performance in both directions. For any modern business, sending data is just as critical as receiving it, and this is where that difference really shows.

Symmetrical Speeds: The Engine for Modern Work

Just think about your team's day-to-day work. Symmetrical speeds mean they can join a video conference without the picture freezing, back up huge volumes of data to the cloud without it taking all night, or send chunky design files to a client in minutes instead of hours.

This balanced performance gets rid of frustrating bottlenecks and genuinely improves productivity. A dedicated connection is a must-have for any company that relies on managed cloud computing services or other critical infrastructure. It simply ensures all your cloud-based tools run exactly as they're supposed to.

Unshakeable Reliability and the SLA Guarantee

You could argue that reliability is the single biggest advantage of a leased line for business. Because the connection is exclusively yours, it’s completely immune to the digital traffic jams that slow down shared broadband networks. When everyone else in the business park is complaining about the internet grinding to a halt at 3 PM, yours will be running at full tilt.

This isn't just a promise; it's backed by a Service Level Agreement (SLA). Think of the SLA as a contractual insurance policy for your internet connection. This document legally guarantees specific standards of service, including:

  • Uptime Guarantee: Most providers promise 99.9% uptime or even higher, so you can be confident your connection will be there when you need it.
  • Rapid Fix Times: Should an issue ever crop up, SLAs commit the provider to a fix within a strict timeframe—often as fast as four to six hours, any time of day, any day of the year.

An SLA turns your internet from a 'best effort' service into a financially backed promise. It gives you peace of mind, knowing that if anything does disrupt your operations, it will be fixed with absolute urgency.

The cost of unreliable internet can be staggering. A 2023 report revealed that UK businesses lost over 50 million working hours due to internet failures, which translates to a massive £3.7 billion in lost productivity. This is precisely why organisations in finance, healthcare, and manufacturing see SLA-backed leased lines as essential.

The SLA is fundamental to business continuity, and it’s a great foundation for building a more resilient IT setup. If you're interested in making your infrastructure more robust, our guide on what is network redundancy is a great next step.

Leased Line vs Business Broadband Head-to-Head

Trying to choose between a dedicated leased line and standard business broadband? It can feel a bit daunting, but when you put them side-by-side, the right choice for your business becomes much clearer. The fundamental difference really boils down to this: are you happy with a public, shared service, or do you need a private, guaranteed one?

Standard business broadband, even the super-fast fibre-to-the-premises (FTTP) stuff, runs on a shared network. The best way to think about it is like a public road. Most of the time it gets you where you need to go, but during rush hour, it gets clogged with traffic and everything slows down. That traffic is what we call contention in the internet world, and it's the reason your connection can grind to a halt at the busiest times of the day.

A leased line for business, on the other hand, is your own private, three-lane motorway. It’s an exclusive, 1:1 connection straight from the exchange to your office. The bandwidth you pay for is 100% yours, 24/7. This completely eliminates the performance dips and slowdowns you see on shared networks, giving you a rock-solid, predictable connection you can build your business on.

Leased Line vs Business Broadband At a Glance

To really get a feel for how different these two services are, let's break down the key features. The differences go way beyond the advertised "up to" speeds and get to the heart of what your business can rely on day in, day out.

Here’s a simple table to show you exactly what you're getting with each option.

Feature Leased Line for Business Standard Business Broadband (FTTP/FTTC)
Connection Type Private & Uncontended (1:1) Shared & Contended
Speed Symmetrical (equal upload/download) Asymmetrical (faster download than upload)
Performance Guaranteed & Consistent Variable & 'Up To' Speeds
Reliability SLA-backed (e.g., 99.9% uptime) Best-Effort Service
Fix Times Guaranteed (often 4-6 hours) Variable (often days)
Cost Higher Monthly Investment Lower Monthly Fee

As you can see, it's not just a like-for-like comparison. With a leased line, you’re investing in guarantees, not just bandwidth.

What This Means for Your Business

That table makes it pretty clear: with a leased line, you're paying for peace of mind. The Service Level Agreement (SLA) isn't just a piece of paper; it’s a legally binding contract that promises a certain level of uptime (often 99.9%) and rapid-response repairs. That's a world away from the "we'll get to it when we can" reality of many standard broadband services.

While a business broadband bundle can be a great, cost-effective option for some, it’s still fundamentally a shared service at its core.

If your business simply cannot function without the internet, that SLA is worth its weight in gold. It turns your internet connection from a simple utility into a resilient, insured business asset that protects you from the crippling cost of downtime. For a closer look at the different types of fibre technology, this guide comparing Fiber Optic vs Cable Internet for Business is a great resource.

Ultimately, a leased line provides a level of assurance that standard broadband was never designed to offer.

Understanding Leased Line Costs and Contracts

Financial professional calculating house costs with a document and calculator, highlighting transparent pricing.

Figuring out the price of a leased line for business isn't as complicated as it might seem. Unlike off-the-shelf broadband deals, a leased line quote is built around your specific business. Think of it less as a product and more as a bespoke service for your company's digital backbone.

The final monthly cost comes from a few key ingredients. Once you understand what they are, you can budget properly and see exactly where the value lies. Let's break down what goes into a typical quote.

Core Factors That Determine Your Monthly Cost

When a provider puts together a price for you, they're mainly looking at three things. Each one has a direct impact on the engineering work and service levels needed to get your private connection up and running.

  • Required Bandwidth: The speed you need is the single biggest factor. Common speeds are 100Mbps, 1Gbps, and 10Gbps, and the price goes up with the speed. It makes sense—a 1Gbps pipe has much more capacity than a 100Mbps one, so it costs more to deliver.
  • Physical Location: Your postcode really does matter here. If your office is in a well-connected city centre, you'll likely pay less than a business in a rural area where new cables might need to be laid just to reach you.
  • Contract Length: Providers like commitment. Signing up for a longer term, like 36 or 60 months, will nearly always get you a better monthly price than a shorter 12-month deal.

Realistic Cost Brackets in the UK

So, what should you actually expect to pay? Looking at recent market rates, a typical 100Mbps to 1Gbps leased line for business in the UK generally costs somewhere between £150 and £450 per month. That price can swing quite a bit depending on where you are and the contract length you choose.

For businesses needing serious firepower, like a 10Gbps service, costs often start from around £500 to £1,000+ per month, particularly in competitive urban hubs like London.

The price reflects the guarantee. You are not just buying speed; you are investing in a contractually guaranteed level of performance, uptime, and rapid support, which is defined in your Service Level Agreement.

Installation and One-Off Charges

On top of the monthly fee, don't forget about the initial setup. A standard installation fee usually covers the basic engineering work to get your service live and kicking.

But sometimes, more work is needed. If engineers have to dig up roads or cross private land to run a new fibre optic cable to your building, you might face what are called Excess Construction Charges (ECCs). Any good provider will be upfront about these potential costs after they’ve done a proper site survey, so you won’t get any nasty surprises down the line. It's all part of the formal agreement, and it pays to know what you're signing up for. To get more familiar with this, have a look at our guide on what to expect from IT Service Level Agreements.

How to Choose the Right Leased Line Provider

Picking a leased line provider is a big commitment. You’re not just buying an internet connection; you're choosing a partner to manage what is arguably your business's most critical utility. It's tempting to just go for the cheapest option, but that can backfire spectacularly when something goes wrong.

The right provider is the bedrock of your digital operations. They'll give you a solid network, a straightforward contract, and expert support that gets how crucial it is to keep you online. Think of it as an insurance policy for your company's connectivity.

Look Beyond the Price Tag

When you're shopping for a leased line for business, the cheapest quote is almost never the best value. A slightly higher monthly cost might be the difference between a provider that fixes a fault in four hours and one that leaves you offline for an entire day. You have to look a bit deeper.

First, ask about their core network. Is it resilient? Do they have multiple connection points around the country to reroute your traffic if there's a problem? A strong network infrastructure is your first line of defence against downtime.

Then, you need to get forensic with the Service Level Agreement (SLA). This contract details every promise the provider makes about performance, uptime, and support.

A provider's SLA is the most important document you'll review. Pay close attention to the guaranteed fix times and the compensation process—this tells you how seriously they take their commitment to keeping your business connected.

Key Questions to Ask Potential Providers

Going in with the right questions helps you cut through the sales pitch and compare providers on what truly matters. Before you even think about signing a contract, make sure you get clear, written answers to these points.

  • What is your target fix time, and is it guaranteed 24/7/365? You should be looking for a commitment of four to six hours. Make sure this applies on weekends and bank holidays, too.
  • Is your customer support team based in the UK? When you have a problem, you want to speak to someone local who can get things sorted quickly, without communication barriers.
  • Can you explain your core network diversity and resilience? A good provider will happily walk you through how their network is designed to handle faults without it affecting your service.
  • What are your standard installation lead times? You need a realistic timeline, which is often somewhere between 30 to 90 days, so you can plan the switch properly.
  • Are all potential installation charges, including ECCs, outlined upfront? Insist on total transparency about any possible one-off costs before you sign on the dotted line.

By prioritising reliability, the quality of support, and a transparent contract, you'll find a provider you can actually trust. This approach turns your leased line from a simple utility into a dependable asset that will support your business as it grows.

Getting Your Leased Line Up and Running

So, you’ve decided a leased line is right for your business. Great! But it’s important to know that getting one installed isn’t like flicking a switch on a standard broadband connection. Think of it more like a small-scale construction project – it’s a planned process with a few distinct steps.

It all starts with a survey. Your provider will first conduct a desk-based survey, using mapping software to sketch out the most likely path for the new fibre cable to reach your office. If everything looks good on paper, they’ll send an engineer out for a physical site survey to check the route in person, spot any potential roadblocks, and figure out the practicalities of getting the connection into your building.

This planning phase is absolutely vital. It’s where the final route is locked in and where everyone gets a clear picture of what’s needed – whether that’s digging a trench, getting permission to cross a neighbour's land, or navigating a tricky building entrance.

How Long Does It Take, and What Can Slow Things Down?

Be prepared for a bit of a wait. A typical leased line installation takes anywhere from 30 to 90 working days, and sometimes longer if hurdles pop up. The biggest and most common cause of delays? Getting legal permission to run the cable across land that isn't public property.

This permission is officially known as a wayleave agreement. It involves a legal negotiation with the landowner, and unfortunately, this part of the process can be slow and is often completely out of your provider's hands.

Other common snags include:

  • Road Closures: If your new line needs to run under a public road, your provider has to get permits from the local council, which can easily add weeks to the timeline.
  • Complex Building Access: Getting into a shared office block, a historic listed building, or a tightly-secured industrial estate can require extra paperwork and coordination.

The best way to think about the installation is as a mini construction project. While your provider will do everything they can to keep things moving, external factors like wayleave negotiations or waiting on council permits can really stretch the timeline.

Knowing about these potential delays from the outset helps you manage your own expectations and plan accordingly. The key is to keep the lines of communication wide open with your provider. A good one will keep you updated every step of the way, working with you to get your dedicated leased line for business activated as smoothly as possible.

Common Questions About Leased Lines for Business

Thinking about getting a dedicated connection for your business? You're not alone. Most people have the same initial questions buzzing around their heads about the practicalities, what happens if things go wrong, and how secure it all is. Let's clear up a few of the most common ones.

Can I Get a Leased Line to a Rural Business Location?

The short answer is: usually, yes, but it can be more complicated. Thanks to the ongoing nationwide full-fibre rollout, getting a leased line to a more remote location is more achievable than ever.

The key step is a physical site survey. This is where an engineer checks exactly what it will take to get a fibre cable to your front door. If it requires significant extra work—like digging up long stretches of road—you might face what are known as Excess Construction Charges (ECCs). The survey gives you a definitive answer on feasibility and any extra costs.

What Happens If My Leased Line Goes Down?

This is where your Service Level Agreement (SLA) becomes your best friend. The moment a fault is reported, the clock starts ticking for your provider.

Most SLAs promise a target fix time of around 4-6 hours, and this support is active 24/7, 365 days a year. If the provider doesn't meet that target, you’re usually entitled to compensation in the form of service credits. It’s this guarantee of a rapid, expert response that really sets a leased line apart from standard business broadband.

Is a Leased Line More Secure Than Business Broadband?

Absolutely. Its security comes from its design. A leased line is a private, dedicated circuit just for your business. You aren’t sharing the connection with anyone else.

This private link between your premises and the internet exchange dramatically cuts down the risk of network-based threats that can be a problem on shared public networks. Think of it as having your own private road to the internet, rather than using the public motorway.

A lot of questions also circle around how long the whole process takes. This timeline gives a good overview of the main stages involved.

Leased line installation timeline infographic with three steps: survey, plan, and install, showing days.

As you can see, you should typically budget for anywhere between 30 to 90 working days from signing the contract to having your new connection up and running.


Ready to get a reliable, high-performance connection that your business can depend on? The expert team at HGC IT Solutions provides bespoke leased line solutions and managed IT services to keep you connected and productive. Get in touch with us today to discuss your requirements.

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