Wondering how much broadband speed your business actually needs?
It is one of the most common questions we hear from Bristol businesses, and one of the easiest to get wrong. Pay for too little and your team struggles through slow video calls and dropped phone lines. Pay for too much and you are funding speed you will never use.
This guide explains what speed means in plain English, what different business activities actually use, and how to work out the right figure for your team without needing a technical background.
At Bytes Digital, based in Clevedon just down the M5, we help businesses across Bristol and the South West choose connectivity that fits how they really work.
The Short Answer
There is no single number, but there is a simple method: add up what your team uses at its busiest moment, then add headroom of around 25 to 50 per cent. The result is the speed to aim for.
As a rough guide, a small team doing email, browsing and the occasional call can manage on a modest connection. Once you add cloud software, a VoIP phone system and regular video meetings, most businesses are better served by full fibre. We cover the options in more depth in our guide to the best broadband for business in Bristol.
Speed, Bandwidth and Latency: What They Mean
These three terms are often used as if they mean the same thing. They do not.
- Speed (or bandwidth) is how much data your connection can carry at once, measured in Mbps (megabits per second). Think of it as the width of a pipe.
- Upload and download are the two directions. Download is data coming to you, such as loading a web page. Upload is data leaving you, such as sending a file or your side of a video call.
- Latency is the delay, in milliseconds, before data starts to move. High latency makes calls feel laggy even when speed looks fine.
For most businesses, the number that causes problems is not download speed. It is upload speed and stability.
What Do Everyday Business Activities Use?
Here is a rough guide to what common activities use. Figures vary by platform and settings, but they are a useful starting point.
- Email and web browsing: a few Mbps per person at busy moments.
- Cloud software (accounting, CRM, hosted systems): moderate and steady, heavier when large files or reports are loaded.
- VoIP phone call: roughly 0.1 Mbps per call, in both directions.
- HD video call (Teams, Zoom): roughly around 1.5 to 2.5 Mbps up and 2.5 to 4 Mbps down, depending on quality and meeting size.
- Cloud backups and large file uploads: can take up all of your upload capacity if not scheduled sensibly.
Notice that phone calls use very little. The real pressure comes from video meetings, large uploads and lots of people doing things at the same time.
How to Work Out Your Number
Use this simple approach. You do not need to be precise. A sensible estimate is enough.
- Count your busiest moment. How many people are on video calls, and how many phone calls run at once?
- Add background use. Cloud software, general browsing, updates and backups running at the same time.
- Add headroom. A buffer of 25 to 50 per cent covers growth, new software and unexpected peaks.
A worked example
- Download: video ~18 Mbps, calls ~1 Mbps, cloud and browsing ~35 Mbps = around 55 Mbps
- Upload: video ~18 Mbps, calls ~1 Mbps, cloud ~5 Mbps, backup ~20 Mbps = around 45 Mbps
- With 30% headroom: roughly 70 Mbps down and 60 Mbps up.
A basic “100 Mbps” package often only has 20 Mbps upload, which would struggle here.
This is an illustration, not a quote. Your own figure depends on what your team does, but the method works for any size of business.
A Starting Point by Team Size
- 1 to 5 people: email, browsing, cloud documents and occasional calls. SoGEA is usually enough, or entry-level full fibre if it is available.
- 6 to 15 people: cloud software, VoIP phones and regular video meetings. Full fibre is usually the sensible choice.
- 16 to 50 people: heavy cloud use, several meetings at once and regular backups. Full fibre with higher-upload business tier plus a backup connection.
- 50+ people, or data-heavy work: large file transfers, hosted systems and no tolerance for downtime. High-capacity full fibre or a leased line.
These are starting points, not rules. A design studio sending large files may need more than a larger office that mostly sends email.
Why Upload Speed Matters More Than You Think
Most broadband adverts talk about download speed. But in a modern business, a lot of work goes the other way: video calls, cloud backups, shared files and hosted systems all depend on upload.
Many standard connections have much lower upload than download. Part fibre (SoGEA) typically reaches up to around 80 Mbps download, with far less upload. Full fibre is much faster, although most full fibre packages still upload more slowly than they download. A leased line works differently and gives you matching upload and download speeds. If your team lives on video calls or sends large files, ask about upload speed, not just the headline figure.
Why Your Broadband Might Feel Slow Even When the Speed Is Fine
Sometimes the speed is not the problem. If your team complains about a slow connection but you are paying for plenty, check these first:
- Wi-Fi coverage. A weak signal in one part of the office feels like slow internet.
- An ageing router or network equipment. Old hardware can become the bottleneck.
- Too much running at once. Backups or updates scheduled during working hours compete with calls.
- Line quality. On part fibre, distance from the cabinet affects performance.
This is where a managed network and proper monitoring make a difference. Our managed IT support team can look at the whole picture, not just the line.
Speed and VoIP Phone Systems
If you use or plan to use a cloud phone system, your broadband matters even more. Calls themselves need very little speed, but they need a stable connection, and they stop completely if the line fails. That is why a backup connection matters alongside speed. Read more in our guide to VoIP phone systems in Bristol and our business broadband backup guide.
The UK’s analogue phone network (PSTN) will be switched off on 31 January 2027. Copper-based broadband such as SOGEA is unaffected, but any phones, alarms or card machines still on analogue lines need to move before then.
Choosing the Right Connection for Your Speed
Once you know your number, the connection type follows. Our guide to the different types of business broadband explains each option, and our fibre broadband page and leased lines page cover the higher-capacity choices. If you are still deciding between a standard connection and a dedicated one, see our leased line vs broadband comparison.
Frequently Asked Questions: Business Broadband Speed
How much broadband speed does a small business need?
It depends on how many people use the connection at once and what they do. A very small team doing email and browsing needs little. Add cloud software, VoIP phones and video calls and you will usually want full fibre.
Is 100 Mbps enough for a business?
For many small and medium businesses, yes. A team of around 20 doing cloud software, calls and video meetings can often work comfortably at around that level, as long as upload speed and stability are good. Upload speed needs checking too, as entry packages are often only 20 Mbps up.
What is more important, download or upload speed?
Both matter, but upload is often overlooked. Video calls, backups and shared files all depend on it, so it is worth checking.
How much bandwidth does a video call use?
Roughly 1.5 to 4 Mbps per person in each direction, depending on the platform, video quality and meeting size.
How much speed does a VoIP phone call need?
Very little, roughly 0.1 Mbps per call. What matters more is a stable connection and a backup in case the line goes down.
Why is my business broadband slow?
It may not be the speed. Weak Wi-Fi, old equipment, backups running during the day and line quality can all make a good connection feel slow.
Can I upgrade my business broadband speed?
Often, yes. Whether you can move to full fibre or a faster product depends on what is available at your address, which we can check for you.
Not Sure How Much Speed You Need?
The simplest way to find out is to talk it through. Our team can look at how your business works, what you run over the internet and which options are available at your Bristol or South West premises.
