The general rule is 25 Mbps per employee for basic usage (email, web browsing, cloud apps) and 50-100 Mbps per employee for heavy usage (video conferencing, large file transfers, streaming). But there are a few things most guides leave out:
Upload speed matters just as much as download
If you use any cloud-based software, take video calls, or have a VoIP phone system, your upload speed is doing as much work as your download speed. Most cable internet plans give you fast download but much slower upload. Fiber gives you symmetrical speeds, meaning upload and download are the same. For a business that lives in the cloud, this is a real difference you will feel every day.
Reliability matters more than raw speed
A restaurant with a 50 Mbps fiber connection that never drops is better off than a restaurant with 200 Mbps cable that goes down during the lunch rush. Your POS system does not need a lot of bandwidth, but it needs to be online 100% of the time. When the internet goes down, you cannot process credit cards. That is the conversation most people skip.
Plan for where you will be in 2-3 years, not just today
If you sign a 36-month contract at a speed that barely covers your current needs, you are going to outgrow it. Think about: Are you hiring more people? Adding more cloud software? Planning to offer guest Wi-Fi? Building out a second location? Factor that in now so you are not stuck later.
Guest Wi-Fi is a hidden bandwidth drain
If you offer Wi-Fi to customers or visitors, those devices add up fast. A busy coffee shop or waiting room can have 20-30 devices connected at once, each streaming or scrolling. If your guest traffic runs on the same connection as your business systems, it can slow everything down. The solution is either a separate network for guests or enough bandwidth to handle both.