1Gbps Leased Line Costs in the UK: 2025 Price Guide

The cost of a 1Gbps leased line has fallen significantly over the past five years, driven by increased competition from alternative network providers and greater fibre infrastructure density across the UK. What once required a significant capital commitment is now within reach for mid-sized businesses — though costs still vary considerably depending on where you are located and which carriers serve your area.

What Does a 1Gbps Leased Line Cost?

The monthly recurring charge for a 1Gbps leased line in the UK typically falls into these ranges:

• City centre and major urban business parks: £400–£600/month
• Suburban commercial areas: £550–£800/month
• Semi-rural or hard-to-reach locations: £750–£1,200/month

These are indicative figures for a 36-month contract. The single biggest variable is your proximity to existing dark fibre or lit fibre infrastructure. A business in a large city centre office building that already has multiple carriers running fibre to the basement will receive very different pricing from a business on an out-of-town industrial estate where the nearest duct is 500 metres away.

What Drives the Price?

Last Mile Distance

The cost of the physical fibre connection from your building to the carrier's nearest point of presence (PoP) is the dominant cost driver. Carriers use a concept called the excess construction charge (ECC) — the additional cost of building infrastructure to reach you. If existing fibre ducts run past your building, the ECC can be zero. If significant groundwork is required, it can add tens of thousands of pounds, which providers either charge upfront or amortise into the monthly recurring charge.

Contract Length

Most providers offer leased lines on 12, 24, 36 or 60-month terms. A 36-month contract is the standard benchmark for pricing comparisons. Moving to a 60-month agreement can reduce the monthly charge by 10–20%. Shorter 12-month contracts carry a significant premium and are typically only worth the extra cost when your business has genuine uncertainty about future premises.

Provider and Network Used

There are dozens of leased line providers in the UK, but most ultimately deliver their service over one of a small number of underlying networks — primarily BT Openreach, Virgin Media Business, CityFibre, or a mix of independent dark fibre carriers. The provider you buy from is not always the network you run over. This matters because different underlying networks have different coverage maps, so the right provider for your location depends on which carrier has infrastructure nearest to you.

SLA Grade

Standard leased line SLAs commit to a four-hour P1 response and a mean time to repair (MTTR) of under eight hours. Some carriers offer enhanced SLAs with two-hour response, guaranteed restoration within four hours, and higher financial credits for missed targets. These premium SLAs add typically £50–£150/month to the cost.

One-Off Connection Costs

Beyond the monthly charge, many leased line contracts include a one-off connection fee covering survey, installation and commissioning. Depending on the provider and location, this can range from:

• £0 — waived on promotional deals or where no civil works are required
• £500–£1,500 — standard installation charge
• £2,000–£10,000+ — where significant groundwork, road opening permits or wayleave negotiations are required

Always confirm the total cost of ownership, including any installation charge, before comparing quotes. A provider offering a lower monthly rate but a high connection fee may be more expensive overall.

What Is Included in a 1Gbps Leased Line Contract?

A well-structured 1Gbps leased line should include:

• A dedicated 1Gbps symmetric circuit — 1,000Mbps upload and download
• A managed CPE router (often a Cisco, Juniper or white-label device)
• A block of static IPv4 addresses (typically a /29, providing five usable addresses)
• IPv6 addressing
• 24/7 network operations centre monitoring
• A formal SLA with defined response, repair and availability targets
• An online portal for fault logging and circuit performance monitoring

Is a 1Gbps Leased Line Worth the Cost?

For the right business, absolutely. A 1Gbps circuit is well-suited to:

• Organisations with 100–400 staff relying heavily on cloud infrastructure
• Businesses running their own data centre or co-location facility
• Multi-site organisations using the main site as a hub for SD-WAN or MPLS
• Businesses that produce or distribute large media files
• Professional services firms where internet downtime has an immediate commercial cost

AMVIA works with a range of UK carriers and can benchmark live pricing from multiple networks for your specific postcode. In many cases, having a specialist broker run the RFQ process returns quotes 15–25% lower than going directly to a single provider.

How Does 1Gbps Compare to 100Mbps?

The price gap between 100Mbps and 1Gbps leased lines has narrowed considerably. In many urban locations, a gigabit circuit costs only £150–£250 more per month than a 100Mbps circuit from the same provider. Given the substantial increase in headroom, many businesses find the upgrade compelling when they are already spending at the lower end of the leased line market.

If you are currently on a 100Mbps leased line approaching renewal, it is worth requesting a 1Gbps quote at the same time. The marginal cost often justifies the capacity increase.