How much does a BT leased line cost per month?

A BTnet dedicated leased line typically costs between £350 and £950 per month for 100Mb to 1Gb symmetrical bandwidth, and roughly £1,800 to £3,200 per month for 10Gb, ex VAT on 3 or 5 year terms. Standard connection is free and BT funds the first £2,800 of excess construction charges. Exact pricing is site-specific, so a formal BT quote is always required.

Why do BT leased line quotes vary so much between sites?

BTnet rentals depend on whether fibre already serves the building, the distance to the nearest BT exchange or aggregation node, and any civil engineering required. Two offices in the same town can receive different quotes. This is why Netify publishes indicative bands rather than a fixed price list.

Does a BTnet leased line include installation?

Yes. Standard connection is free on 3 and 5 year BTnet terms, and BT funds the first £2,800 of excess construction charges per circuit. If a site survey identifies civils work above that figure, the excess is quoted before you commit.

Is a 5-year BTnet contract cheaper than a 3-year one?

The monthly rental on a 5-year term is typically 5 to 10% lower than the equivalent 3-year rental. The trade-off is flexibility: a 3-year term suits businesses expecting to move site or re-tender connectivity sooner.

What does BTnet cost inside a data centre?

BTnet Data Centre Access is priced at significantly reduced rentals compared with premises delivery, typically around a third less, because the access infrastructure already exists. It also delivers in as little as 15 working days versus 60 to 90 for premises circuits.

What do BTnet Security and Wi-Fi add to the monthly cost?

BTnet Security is £100 per month with the small Cisco Meraki router (up to 500Mb) or £200 per month with the large router at 1Gb. BTnet Wi-Fi access points cost £8 to £10 per access point per month on a 5-year term, with the first access point free.

BTnet pricing guide, reviewed 3 July 2026

BT Leased Line Cost Calculator

A BTnet dedicated leased line typically costs £350 to £950 per month for 100Mb to 1Gb symmetrical bandwidth on 3 or 5 year terms, and roughly £1,800 to £3,200 per month at 10Gb, ex VAT. Standard connection is free and BT funds the first £2,800 of construction charges. Exact pricing is site-specific: estimate your configuration below, then request an exact costed quote.

Bandwidth

Contract term

Where is the circuit delivered?

Resilience option

BTnet Security (Cisco Meraki)

Additional Wi-Fi 6 access points (first AP free)

Typical monthly rental

£725

per month, ex VAT

Indicative range

£550 - £950

site-specific: fibre presence and civils

3-year term total

£26,100

at the typical monthly figure

BTnet circuit (1Gb on a 1Gb bearer, 3-year): £725/month
One-off connection (3 and 5 year terms): £0 standard

Circuit rentals are indicative Netify market estimates, not a BT quote: BTnet pricing is generated per site by BT and varies with existing fibre, distance and civils. Free standard connection applies on 3 and 5 year terms and BT funds the first £2,800 of excess construction charges per circuit. BTnet Security and Wi-Fi access point prices are published BT figures. All figures ex VAT.

Request an exact costed quote IT company? Resell BTnet at 35% commission

Who this calculator is for

IT managers and finance leads budgeting a first dedicated internet connection, multi-site businesses comparing an upgrade from FTTP or SOGEA broadband, and procurement teams sanity-checking a BT quote against the market. If you are an IT company or MSP looking to sell BTnet to your own customers, the commercial model lives on the BT Business Internet reseller programme page.

What drives the cost of a BTnet leased line

Factor	Effect on price
Bandwidth and bearer	The single biggest driver. A 100Mb service on a 1Gb bearer costs materially less than 1Gb, and 10Gb steps up again. Ordering a 1Gb bearer lets you upgrade bandwidth later without new civils.
Existing fibre at the site	Buildings already served by BT fibre price at the low end of a band. Sites needing new fibre runs price higher and take longer to deliver.
Contract term	5-year terms carry roughly 5 to 10% lower monthly rentals than 3-year terms in exchange for a longer commitment.
Delivery location	BTnet Data Centre Access, delivered inside a supported third-party UK data centre, is significantly cheaper than premises delivery and installs in as little as 15 working days.
Resilience	A Failover second line roughly doubles the circuit element. Backup with Quick Connect adds around a third. Load Balancing sits in between and keeps both lines active.
Excess construction charges	BT funds the first £2,800 of civils per circuit. Rural or hard-to-reach sites can exceed that; the excess is quoted after survey, before you commit.

What every BTnet circuit includes

Symmetrical, uncontended bandwidth (1:1 contention) from 30Mb to 10Gbps with unlimited usage.
100% availability SLA with service credits, a five-hour target fix time and 24/7 UK support.
UK latency under 20ms, with Quality of Service prioritisation for voice and real-time applications.
Free standard connection on 3 and 5 year terms, plus the first £2,800 of excess construction charges funded by BT.
Free standard allocation of IPv4 static addresses and online bandwidth reporting.
Managed router with engineer installation, with a Cisco Meraki option that includes BTnet Security by default.

What buyers miss when budgeting a leased line

Lead times, not just price. Premises delivery typically takes 60 to 90 working days where civils are needed. If the site sits inside a supported UK data centre, Data Centre Access delivers in as little as 15 working days.
The bearer decision. Ordering 100Mb on a 1Gb bearer costs slightly more per month than a 100Mb bearer but makes the future upgrade to 500Mb or 1Gb a config change rather than a new circuit.
Excess construction charges. The £2,800 BT contribution covers most urban sites. Budget contingency for rural sites and always wait for the survey before committing fit-out dates.
Resilience scoped too late. Adding Failover or Backup after go-live means a second delivery project. Scope it in the original order if downtime carries real cost.
Broadband as backup. Many buyers pair BTnet with an FTTP broadband circuit as a low-cost backup rather than a second leased line, which the calculator models under resilience.

Frequently asked questions

How much does a BT leased line cost per month?: A BTnet dedicated leased line typically costs between £350 and £950 per month for 100Mb to 1Gb symmetrical bandwidth, and roughly £1,800 to £3,200 per month for 10Gb, ex VAT on 3 or 5 year terms. Standard connection is free and BT funds the first £2,800 of excess construction charges. Exact pricing is site-specific, so a formal BT quote is always required.
Why do BT leased line quotes vary so much between sites?: BTnet rentals depend on whether fibre already serves the building, the distance to the nearest BT exchange or aggregation node, and any civil engineering required. Two offices in the same town can receive different quotes. This is why Netify publishes indicative bands rather than a fixed price list.
Does a BTnet leased line include installation?: Yes. Standard connection is free on 3 and 5 year BTnet terms, and BT funds the first £2,800 of excess construction charges per circuit. If a site survey identifies civils work above that figure, the excess is quoted before you commit.
Is a 5-year BTnet contract cheaper than a 3-year one?: The monthly rental on a 5-year term is typically 5 to 10% lower than the equivalent 3-year rental. The trade-off is flexibility: a 3-year term suits businesses expecting to move site or re-tender connectivity sooner.
What does BTnet cost inside a data centre?: BTnet Data Centre Access is priced at significantly reduced rentals compared with premises delivery, typically around a third less, because the access infrastructure already exists. It also delivers in as little as 15 working days versus 60 to 90 for premises circuits.
What do BTnet Security and Wi-Fi add to the monthly cost?: BTnet Security is £100 per month with the small Cisco Meraki router (up to 500Mb) or £200 per month with the large router at 1Gb. BTnet Wi-Fi access points cost £8 to £10 per access point per month on a 5-year term, with the first access point free.

Methodology and sources

Circuit rental bands are indicative market estimates drawn from Netify quoting experience as a BT Authorised Partner since 2012, reviewed on 3 July 2026. They are deliberately shown as ranges because BTnet pricing is generated per site by BT. BTnet Security, Wi-Fi access point pricing, the free standard connection, the £2,800 construction contribution, the 100% availability SLA and the five-hour fix target are published BT figures. Netify is listed on the official BT Business authorised partners directory. Robert Sturt, Managing Director, is the named reviewer for the accuracy of this page.

Related Netify resources

What is a BT leased line (BTnet)? The plain-English explainer.
Why choose BTnet: key benefits explained.
The BTnet Fortinet NGFW option for security-led deployments.
BT Cloud Voice pricing calculator for the voice service most BTnet buyers attach.
Resell BT Business Internet if you are an IT company selling to your own customers.