“How much is a leased line?” is the most common question we get, and the honest answer is: it depends, more than almost any other telecoms product. Two businesses on the same street can get very different quotes. Rather than dodge it, here is exactly what drives the cost of a leased line, why the quotes vary so much, and the practical ways to bring the price down.
Why there is no single price
A leased line is not an off-the-shelf package; it is a dedicated fibre connection built to your specific building. Because the work involved is different at every address, it is always quoted per site. That is also good news: it means there is real room to influence the cost, once you understand what the quote is actually made of.
What drives the cost
| Factor | Why it matters | What you can do |
|---|---|---|
| Distance to fibre | The biggest factor. The further your building is from the nearest usable fibre, the more civil work is needed | Check if your building is already close to, or on, a fibre network |
| Construction (ECCs) | Excess Construction Charges cover digging, ducting and wayleaves where fibre has to be brought to you | Ask for the ECC position early; providers often contribute |
| Bandwidth | A faster port and a bigger bearer cost more | Right-size it; start on a lower port you can upgrade later |
| Contract length | Longer terms usually reduce the monthly cost | A 3 or 5 year term can lower the monthly price |
| Location | Rural and hard-to-reach sites cost more than on-net buildings | Know your options before committing to a site |
| Resilience | Adding a second, diverse line or failover adds cost | Match resilience to how critical uptime really is |
The one that catches people out: construction charges
If there is no usable fibre near your building, someone has to physically bring it to you, and that civil engineering, digging up pavements, pulling cable through ducts, securing landlord permissions, is where a leased line quote can leap. These Excess Construction Charges are the single biggest reason two quotes differ so wildly. The good news is they are often reduced or absorbed: providers frequently contribute towards them, a longer contract can offset them, and where they are available, government gigabit voucher schemes can help cover the build. Always get the construction position confirmed up front, because it changes everything.
How to bring the cost down
- Check if your building is on-net. If fibre is already in or near the building, you skip most of the construction cost. This is the biggest single lever.
- Right-size the bandwidth. A leased line has a bearer (the maximum it can carry) and a port (what you pay for today). Take a bigger bearer with a smaller port, and you can scale up later without a rebuild.
- Consider the contract term. A longer commitment usually lowers the monthly figure and can soak up construction charges.
- Ask about funding. Where a gigabit voucher scheme is running in your area, it can meaningfully reduce the build cost.
- Make sure you actually need one. If a dedicated line is more than you require, full fibre may do the job for less.
The number that moves a leased line quote the most is not the speed, it is the distance to fibre and the construction it triggers. Nail that down first, and the rest of the quote starts to make sense.
Is a leased line even right for you?
A leased line gives you dedicated, uncontended, symmetric bandwidth with a strong fix-time guarantee, which is why uptime-critical businesses choose it. But it is not the only option. If you want to weigh it against the cheaper alternative, our guides on leased line vs full fibre and contended vs dedicated connections lay out the trade-offs. And if timing matters, see how long a leased line takes to install.
Frequently asked questions
Why are leased lines so expensive?
Because you are not sharing the connection with anyone. A leased line is dedicated fibre built to your building, with guaranteed speeds and fix times. Where fibre has to be dug in to reach you, construction charges add to the cost, which is why quotes vary so much between sites.
What are Excess Construction Charges?
They are the cost of the physical build needed to bring fibre to your premises, digging, ducting and landlord wayleaves, when there is no usable fibre nearby. They are often the biggest variable in a quote, and providers frequently contribute towards them.
Can I get a grant towards a leased line?
Sometimes. Government gigabit voucher schemes have, at various times, helped businesses cover the build cost of a fast connection. Availability changes, so it is worth checking what is running in your area when you get a quote.
How can I make a leased line cheaper?
Choose a building that is on or near fibre, right-size the bandwidth with room to grow, consider a longer contract term, and ask about construction contributions and any funding. Getting multiple carrier quotes also helps.
How Synergy Max helps
We take the guesswork out of leased line pricing. We check whether your building is already on-net, get quotes from multiple carriers rather than one, confirm the construction position before you commit, and right-size the bandwidth so you are not paying for headroom you will never use. Where funding is available, we flag it. Explore our leased lines and we will get you a real quote for your actual building, not a vague ballpark.