Connectivity·5 min read·April 22, 2025

How Much Internet Speed Does Your Business Actually Need?

Most businesses either overpay for speed they don't use or underbuy and create bottlenecks. Here's a practical framework for calculating exactly how much bandwidth your office needs.

Why Bandwidth Sizing Matters

Buying too little internet speed creates real problems — slow applications, dropped video calls, sluggish file uploads. Buying too much is just money wasted.

Most businesses arrive at their current bandwidth one of two ways: they bought what their carrier rep recommended (which tends toward overselling), or they bought what they had before and added a bit more (which doesn't account for how dramatically cloud application adoption has changed bandwidth needs since 2018).

A simple calculation framework gets you to the right number.

How to Calculate Your Required Bandwidth

Step 1: Count your concurrent users

How many employees will be actively using the internet at the same time during peak hours? This is usually 60–80% of your total headcount for knowledge workers.

*Example: 40 employees × 75% = 30 concurrent users*

Step 2: Add up per-user bandwidth by application

|---|---|---|

For a typical knowledge worker doing web browsing, video calls, and cloud file sync: 8–14 Mbps down, 6–10 Mbps up.

Step 3: Apply a contention factor

Not everyone is doing the heaviest activity at once. A contention factor of 0.6–0.8 accounts for realistic variance.

Step 4: Add overhead for shared services

On-site servers, NAS devices: add 20–50 Mbps depending on usage
IP security cameras: 2–5 Mbps per camera at 1080p
POS systems: minimal, 1–2 Mbps total for most retail environments
IoT/building management systems: typically negligible

Step 5: Add a 30–50% growth buffer

Bandwidth needs typically grow 20–30% per year in cloud-heavy environments. Buy enough headroom that you won't need to upgrade within 12–18 months.

Quick Reference by Business Size

These estimates assume a cloud-first workforce (Microsoft 365 or Google Workspace, VoIP, video calls, and cloud file sync):

|---|---|---|

Application	Download (per user)	Upload (per user)
Web browsing + email	2–5 Mbps	1 Mbps
Video calls (1080p)	3–4 Mbps	3–4 Mbps
VoIP calls	0.1 Mbps	0.1 Mbps
Cloud file sync (active)	2–5 Mbps	2–5 Mbps
Streaming video (training, etc.)	3–5 Mbps	0.5 Mbps
Remote desktop	2–4 Mbps	2–4 Mbps
Company Size	Minimum	Recommended
1–10 employees	50 Mbps / 20 Mbps up	100 Mbps symmetric
11–25 employees	150 Mbps / 50 Mbps up	250–500 Mbps symmetric
26–50 employees	300 Mbps / 100 Mbps up	500 Mbps–1 Gbps symmetric
51–100 employees	500 Mbps / 200 Mbps up	1 Gbps symmetric
100+ employees	1 Gbps+ / 500 Mbps up	1–10 Gbps symmetric DIA

*"Symmetric" means equal upload and download speeds — important for cloud-first environments.*

The Upload Speed Trap

Most shared broadband products (cable, DSL) provide dramatically asymmetric speeds — fast downloads, slow uploads. Typical cable business internet: 500 Mbps down / 50 Mbps up.

In 2025, this is often insufficient. Your employees' video calls are uploading as much as they're downloading. Cloud backups, file syncs, and remote desktop sessions all depend on upload bandwidth.

If your business relies heavily on cloud collaboration, video conferencing, or remote access, symmetric fiber or DIA is worth the cost premium. Budget for upload bandwidth, not just download.

Warning Signs You're Bandwidth-Constrained

Employees complain of slow speeds in the afternoon (shared network congestion peak)

Video calls drop quality or disconnect during busy periods

Cloud file syncs are always running behind

VPN connections are slow for remote employees connecting to office systems

Large file uploads take hours instead of minutes

If you're experiencing any of these, run a bandwidth test (speedtest.net/business) during peak hours. Compare the result to your provisioned speed — if actual throughput is significantly below what you're paying for, there's a problem worth investigating.

Getting the Right Package at the Right Price

Carriers often structure their packages to encourage upselling to the next tier. The most cost-effective approach is to calculate what you actually need, then request quotes for that specific tier from multiple carriers. A telecom broker does this across 300+ carriers simultaneously, often finding pricing 15–25% below what you'd get going directly to a carrier.

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