Cost modeling
True cost per active user calculator
Per-seat cost lies when half your seats sit idle. Enter licensed seats, monthly cost, and weekly active users, get the real cost per actual user. Often 2-4× the per-seat sticker.
When this calculator helps
- Quarterly stack review with finance.
- Killing low-utilization tools that survive on inertia.
- Negotiating tier downgrades based on real usage, not the headline seat count.
When to look elsewhere
- Compliance or security tools where activation is binary (it works whether or not it's clicked).
- Tools where 'weekly active' is the wrong cadence (annual planning tools, etc.).
Worked example
A 50-person company is paying $3,500 per month for 60 Notion seats, but the vendor dashboard shows only 28 weekly active users. Sticker per seat: $3,500 divided by 60, or $58. True cost per active user: $3,500 divided by 28, or $125. The cost per actual user is more than double the headline number.
Idle seats: 32. Annual waste on those idle seats: 32 times 58 times 12, or $22,272 per year being paid for licenses that are not in use. The right action is twofold: at renewal, drop the seat count to 35 (slightly above active usage to allow for growth), and audit which teams hold idle seats so they get reassigned rather than simply removed.
How this calculator works
The model separates the per-seat sticker price (what you appear to pay per license on paper) from the true per-active-user cost (what you are actually paying per real user). The difference between the two reveals stack waste that the vendor's per-seat invoice does not surface. Annual waste is calculated as idle seats times sticker price times twelve.
Choice of activity window matters. For collaboration and productivity tools (Notion, Slack, Asana), weekly active is the right metric because anything less frequent is effectively unused. For tools used episodically (annual planning, HR review cycles, contract management), monthly active is a more honest denominator. The activation rate output uses whichever cadence you input; choose deliberately based on how the tool is actually used.
Frequently asked questions
What activation rate is acceptable?
80%+ is healthy. 60-80% means review at next renewal. Under 60% means kill, replace, or downgrade.
Should I use weekly or monthly active users?
Weekly is the standard for collaboration tools. For tools used episodically (HR, expense, contract management) monthly active is fine.