Leased Lines vs Business Broadband: What's the Difference?

Most businesses run perfectly well on standard business broadband. But for some, especially anywhere with heavy upload traffic, multiple sites, or genuinely mission-critical connectivity, a leased line is the better fit. Here's what actually separates the two, and how to tell which one a business needs.

What Is a Leased Line?

A leased line, also called dedicated internet access (DIA), is a private connection that runs exclusively to one business — nobody else's traffic shares it, in either direction. Unlike broadband, which is a "contended" service (bandwidth shared across a local area, with speed dropping at busy times), a leased line delivers the same guaranteed speed, symmetrically, whether it's 3am or the middle of a Monday rush.

What Is Business Broadband (FTTC / FTTP)?

Business broadband typically comes in two forms: FTTC (Fibre to the Cabinet), where fibre runs to a local street cabinet and the final stretch to the building is still copper, and FTTP (Fibre to the Premises), where fibre runs all the way to the building itself. FTTP is faster and more reliable than FTTC, but both are still contended, shared services — and both are typically asymmetric, meaning download speed is significantly faster than upload speed.

Leased Line vs Broadband: The Key Differences

	Leased Line	Business Broadband (FTTC/FTTP)
Shared or dedicated?	Dedicated — exclusively yours	Shared/contended with other users
Upload vs download	Symmetrical (equal speeds)	Usually asymmetric (download faster)
Speed at busy times	Guaranteed, doesn't drop	Can slow down during peak usage
Typical cost	Higher	Lower
Service Level Agreement	Usually includes guaranteed uptime and fix times	Typically best-effort, no guarantee

Which One Does a Business Actually Need?

For most small and medium businesses, good quality FTTP business broadband is genuinely sufficient — it's considerably cheaper, and modern FTTP is fast and reliable enough for day-to-day use including VoIP and video calls.

A leased line becomes the better choice when:

• Upload speed matters as much as download — large file transfers, cloud backups, hosting your own services.
• Downtime is genuinely costly — businesses where an internet outage directly stops revenue or operations, and a guaranteed SLA with fix-time commitments matters.
• Multiple sites need connecting together — leased lines are often used to build private, dedicated connections between offices.
• A high, consistent number of simultaneous VoIP calls or video conferences run through the connection, where shared bandwidth dropping at peak times would be a real problem.

Connectivity Through Plustel

Plustel has a strategic partnership with the UK's leading award-winning ISP, giving partners access to a wide range of connectivity options — from SoGEA and full-fibre FTTP business broadband through to leased lines — at competitive wholesale prices. Every connection includes full provisioning and a comprehensive range of fault diagnostic tools through the partner portal, so day-to-day management doesn't depend on waiting for a support ticket.

Whether a customer needs straightforward FTTP broadband or a dedicated leased line with guaranteed uptime, the Business Connectivity page has the details, and the team can help work out which option actually fits a specific customer's needs.