Microsoft Fabric vs Power BI: What's the Difference, and Do You Need Fabric?

Power BI is Microsoft's reporting and dashboard tool. You connect it to your data, build reports and share them with your team. Most businesses license it per person, with Power BI Pro or Premium Per User (PPU).

Fabric is a bigger platform that brings several data tools together:

• OneLake, a single storage layer for your organisation's data
• Data Factory, for moving and transforming data
• Data engineering, with Spark notebooks
• Data warehouse, for SQL workloads
• Real-Time Intelligence, for streaming data
• Power BI, for reports and dashboards

All of these share one pool of computing power, called a capacity. Power BI is now one part of Fabric, rather than a separate product sitting next to it.

Microsoft is retiring Power BI Premium per capacity, the “P” SKUs such as P1. When your current agreement ends, you can't renew it. You move to a Fabric capacity, an “F” SKU, instead.

The default swap is simple: a P1 maps to an F64, a P2 to an F128, and so on. Moving your workspaces across is mostly a case of assigning them to the new capacity.

Power BI Pro and Premium Per User aren't affected. If that's how you license Power BI today, nothing changes for now.

Here's the detail that trips people up. On an F64 capacity or bigger, people with a free Power BI licence can view reports. On smaller capacities (F2 up to F32), everyone who views content still needs a Pro or PPU licence. Report authors need Pro or PPU on any size.

So the right size depends on how many people read your reports, not just how much data you have. If hundreds of people view your dashboards, an F64 can work out cheaper than buying Pro licences for all of them. If you have 30 users, it almost certainly won't.

You probably don't need Fabric yet if:

• your team is small and everyone already has Pro licences
• your data comes from a handful of sources and Power BI handles it fine
• your reports refresh happily and your data models fit within Pro limits

Fabric starts to make sense if:

• you're on Power BI Premium capacity and your renewal is coming up
• you have a large number of report viewers
• you need to bring data from many systems into one place
• you run a separate data warehouse or pipeline tool and want everything under one roof
• your data models have outgrown what Pro can handle

Shared capacity. Every workload draws on the same capacity, so a heavy data job can slow your dashboards down. Capacity monitoring isn't optional.

Size it on real usage. The P1 to F64 mapping is a starting point, not a rule. Check your actual usage in the Fabric Capacity Metrics app before you commit. Many organisations can run on less.

The rand. Cloud prices are set against the US dollar, so a weaker rand pushes your costs up. Reserving capacity, or choosing a smaller one, gives you more control.

Get the data right first. Fabric won't fix messy data. If your numbers don't match between reports today, they won't match on Fabric either. Our guide to getting your data AI-ready covers the basics.

1. List who builds reports and who only reads them.
2. Check your current Power BI licences and any Premium renewal date.
3. Look at where your data lives and how many systems feed your reports.
4. Pull your real capacity usage for the last few months.
5. Compare the cost of Pro licences with an F capacity of the right size.

If that sounds like a lot, it's exactly what we look at in a Power BI health check.

At Big Data SA, we help South African teams get more from Power BI, plan their move to Fabric and build data platforms that last. See our analytics and BI service and our data engineering service, try the free AI and data readiness check, or talk to us about Fabric.