Definition
Utilisation rate measures how much of your paid software is genuinely in use. It compares the number of active users against the number of seats assigned over a set period, and expresses the result as a percentage. A high utilisation rate means most of what you buy returns value. A low one means a large slice of the spend is sitting idle and can likely be reclaimed or not renewed.
The metric matters because invoices show seats bought, not seats used. Utilisation rate is the bridge between the two. It is the number that tells a finance team whether a tool that costs a quarter of a million dollars a year is delivering against that cost or quietly carrying hundreds of dormant accounts.
How to calculate utilisation rate
The calculation is simple. Divide active users by assigned seats over a chosen window, then convert to a percentage. If three hundred seats are assigned and two hundred of them were active in the last sixty days, the utilisation rate is roughly sixty seven percent, which flags about a hundred seats worth reviewing. The two inputs each carry a definition worth pinning down: an assigned seat is any license allocated to a person, set out in seat based licensing, while an active user is someone who actually used the tool in the window, defined in active user.
The window you choose shapes the result, so it should fit the tool. Thirty days suits a daily app, ninety suits an occasional one. The practical mechanics of measuring this across a stack are covered in measuring SaaS license utilisation.
What counts as a good utilisation rate
There is no single target that fits every tool, because healthy usage patterns differ. A core collaboration platform that most of the company touches daily should sit high, and anything well below full usage there signals reclaimable seats. An occasional but critical tool, such as a signing platform used mainly at quarter end, can run lower without being wasteful. The useful test is not hitting a fixed percentage, it is the size of the gap between seats paid for and seats used, because that gap is the spend a buyer can recover.
Why utilisation rate drives savings
Utilisation rate is the evidence behind almost every right sizing decision. It quantifies how many seats can be reclaimed, how strong the case is for downgrading a plan tier, and how much leverage a buyer holds heading into a renewal. It also exposes the quiet cost of shelfware, the licenses paid for and never used that are defined in shelfware. Without a utilisation figure, reclamation is an argument. With one, it is a calculation, and calculations get approved. To put the metric to work across your estate, the broader discipline is mapped in the spend and licensing glossary.