Business internet has never had more options - or more confusing names. Full fibre, FTTC, leased lines, SoGEA, 5G: the labels multiply while the real question stays simple. What does your office actually need to work reliably, and what are you overpaying or underbuying for? This guide explains the realistic choices in plain terms, and which one fits a typical UK small business.
The two questions that decide everything
Before comparing packages, answer two questions, because together they point straight at the right type of connection. First: how badly would an outage hurt? An hour offline is an annoyance for some businesses and a disaster for others. Second: how much do you upload, not just download?
That second one trips people up. Consumer broadband is built for downloading - streaming, browsing - so its upload speed is far slower. But a modern office uploads constantly: cloud backups, sending large files, video calls, putting documents into Microsoft 365. If your work lives in the cloud, upload speed and reliability matter as much as the headline download figure. Understanding what 'fast' even means helps here - see bandwidth vs throughput vs latency.
The main options, plainly
Strip away the brand names and there are a handful of genuinely different connection types. Here they are from cheapest-and-simplest to most-robust, with who each suits.
- •Standard broadband (FTTC / part-fibre): fibre to the street cabinet, copper to your office. Cheap and widely available, but slower uploads and ageing - fine for very small or backup use.
- •Full fibre (FTTP): fibre all the way to the building. Fast both ways and far more reliable; the sensible default for most offices where it is available.
- •Business-grade fibre with a better service level: the same full fibre but with faster fault-fix guarantees and business support - worth the extra if downtime hurts.
- •Leased line (dedicated line): a private connection that is yours alone, with symmetric speed (upload equals download) and a strong uptime guarantee. The gold standard for firms that cannot afford to be offline.
- •Mobile (4G/5G): quick to install and excellent as a backup or for temporary and rural sites; usable as a primary line where fixed options are poor.
Contended vs dedicated: the difference you pay for
The biggest hidden distinction in business broadband is whether your connection is shared or dedicated. Ordinary broadband, even full fibre, is contended - you share capacity with other users nearby, so speeds can dip when everyone is online at once. A leased line is dedicated and uncontended: the speed is yours, guaranteed, at any time of day.
This is also why a leased line's quoted speed is one you genuinely get, while broadband's headline number is a best case. For many small offices, good full fibre is the right balance of cost and performance. For firms where being offline means losing money - or where lots of staff rely on steady cloud and voice all day - a dedicated line's guarantees justify the higher price. Match the spend to how much certainty the business actually needs.
Resilience: the part most offices skip
Here is the uncomfortable truth: almost every business now depends on its internet completely, yet most have a single connection with no fallback. When that one line fails - and lines do fail - the whole office stops. For a cloud-reliant firm, internet resilience is no longer optional.
The fix is a second, different connection that takes over automatically if the main one drops, ideally over a different technology - for example a 5G backup behind a full-fibre primary, so a single street fault cannot take you fully offline. The clever bit is having something switch between them seamlessly, which is exactly what SD-WAN does. Even a simple automatic failover transforms reliability. If the internet matters to your business - and it does - one line is a risk you can design out.
Avoiding the common mistakes
A few errors recur when businesses buy connectivity, and all of them are avoidable once you know to look. The theme is that the cheapest or fastest-sounding option is rarely the best-value one for an office.
Do not buy a consumer package for a business - you lose the support, the upload performance and the fault-fix guarantees you will need. Do not fixate on the download number while ignoring upload and reliability. Do not assume the Wi-Fi is the line's fault: a great connection behind a weak office network still feels slow, which is why wired vs Wi-Fi for business matters. And do not forget security at the edge - your connection meets the internet through a firewall, so pair the right line with sensible network security.