SaaS True Cost Open calculator

Cost modeling

True cost per active user calculator

Short answer

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.

Sticker per seat
True cost per active user
Annual waste on idle seats
Activation rate

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.).

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.