Business Broadband

Do you actually need a leased line?

A leased line is the gold standard, but it isn't the right answer for every business. Understanding when you truly need one — and when FTTP will serve you just as well — protects your budget.

5 min readUpdated Jun 2026
Key points
  • A leased line gives symmetric speed and much stronger SLAs
  • FTTP + 4G failover is often enough under 25 users
  • Uptime-critical operations should default to a leased line
  • Allow 45–90 working days for a leased-line install

What a leased line actually gives you

Uncontended bandwidth, symmetric upload/download, and much stronger SLAs. You get the full speed you pay for, 24/7, with a target fix time in hours rather than days.

When FTTP is enough

For teams under about 25 people using standard SaaS tools, a well-provisioned FTTP line with good routing usually keeps up. Add a 4G/5G failover and you have a resilient setup at a fraction of the cost.

When you truly need a leased line

Contact centres, trading floors, medical practices, video-production houses and any site with a strict uptime SLA to their own customers should be on a leased line.

Contract length and install lead time

Leased-line contracts run 12–60 months and installs can take 45–90 working days. Plan renewals early — the switch takes real project time.

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