Uncapped vs Capped Fibre: The Truth About Data Limits
Don't get caught out by hidden limits. Learn the difference between uncapped, capped, and 'pure' uncapped fibre.
Uncapped vs Capped Fibre: Navigating the Data Maze
Executive Summary
In the early days of the internet, "Capped" data was the norm. Today, almost every fibre package in South Africa is marketed as "Uncapped." However, the term "Uncapped" has become a marketing umbrella that hides a variety of Fair Use Policies (FUPs), shaping, and throttling. This guide explains what you're actually signing up for and how to spot a truly unlimited connection.
The Three Types of Data Plans
- Capped: You have a fixed amount of data (e.g., 200GB). When it's gone, you're disconnected or charged for top-ups. (Rare in 2025).
- Uncapped (with FUP): You have "unlimited" data, but if you exceed a certain threshold (e.g., 1TB), your speed is slowed down (throttled).
- Pure Uncapped: No limits, no thresholds, and no throttling. This is the gold standard for power users.
Comparison: Data Plan Features
| Feature | Capped | Uncapped (FUP) | Pure Uncapped |
|---|---|---|---|
| Monthly Limit | Yes (Hard) | No (Soft) | No |
| Throttling | No (Cut off) | Yes (After limit) | No |
| Shaping | No | Often | No |
| Best For | Very light users | Average families | Power users / Gamers |
Understanding Shaping and Throttling
These are the two tools ISPs use to manage their network capacity.
What is Shaping?
Shaping is the practice of prioritizing certain types of traffic over others. For example, an ISP might prioritize "Real-time" traffic (Zoom, Gaming, Netflix) over "Non-real-time" traffic (Torrents, large Windows updates). This ensures that your movie doesn't buffer just because your neighbor is downloading a 100GB game.
What is Throttling?
Throttling is a permanent reduction in your line speed for a specific period (usually until the end of the month). This usually happens when you exceed a "Fair Use" threshold. For example, your 100Mbps line might be slowed to 10Mbps after you use 1.5TB of data.
Practical Checklist: Spotting a "Pure" Plan
- Check the FUP Document: Every ISP has one. Look for the "Thresholds" section.
- Look for "Unshaped": If the marketing says "Unshaped," it means all traffic is treated equally.
- Ask about "Star" Ratings: Some ISPs use a star system to show how much you've used relative to others.
- Verify the "Clawback": Ensure the "Uncapped" nature isn't tied to a restrictive contract.
Next Steps
Find a plan that actually lets you use the data you pay for.
Related Guides
Frequently Asked Questions
Is 'Uncapped' really unlimited?
Technically yes, you won't be cut off. But practically, if you are throttled to 1Mbps, the internet becomes almost unusable for modern tasks.
How much data does an average family use?
In 2025, an average South African family of four uses between 400GB and 800GB per month.
Does 'Pure Uncapped' cost more?
Yes, usually. You are paying a premium for the ISP to guarantee your full speed regardless of how much you download.
Next Steps
Ready to put this knowledge into practice? Use our tools to find the best fibre connection for your home or office.