Cost shape and forecasting

Per seat vs usage-based pricing

Per seat pricing charges a rate for each user, so the cost is predictable once the seat count is known and it drifts upward as an organization grows. Usage-based pricing charges for what is consumed, so the rate is knowable but the bill is not. The two require different controls: seat pricing needs periodic review of who actually uses the product, usage pricing needs monitoring and an alert.

The Vendor Squeezer team. Last reviewed 2026-08-08. General guidance on contract structures, not legal advice, and not a statement about any particular vendor's terms.

What each model makes easy and what it hides

Per seat pricing is easy to budget and easy to overpay for, because seats are added when someone joins and rarely removed when they leave a team. The overpayment is invisible on an invoice, which shows a total rather than the number of accounts that have not been opened in six months.

Usage-based pricing is the opposite. It is hard to budget and hard to overpay for in a static way, because you pay for what you consume. The risk moves to variance: a change in how the product is used can move the bill substantially without anyone signing anything.

Seats provisioned, seats assigned, seats used

Three numbers travel under the word seats and they are usually different. Provisioned is what the contract commits to. Assigned is how many accounts exist. Used is how many people actually opened the product in a recent period.

Only the vendor's own reporting or your identity system can tell you the third number, and it is the one that decides whether the renewal quantity is right. Assuming assigned equals used is how a seat count ratchets upward for years.

Controls that fit each model

The controls are not interchangeable, which is why recording the model matters operationally and not only for the forecast.

  • Per seat: a periodic review of assigned versus active accounts, and a leaver process that removes seats.
  • Per seat: knowing whether seats can be reduced mid-term or only at renewal.
  • Usage based: a consumption alert set below the point at which the bill would be a surprise.
  • Usage based: knowing whether any committed minimum applies regardless of consumption.

Questions to ask about your own agreement

  1. 1.How many seats are committed, and how many are actually active?
  2. 2.Can seats be reduced during the term, or only at renewal?
  3. 3.For usage pricing, what is the unit and the rate, with its currency?
  4. 4.Is there a minimum charge that applies even at low usage?
  5. 5.What would a doubling of usage cost, and would anyone notice before the invoice?

Common questions

Which model is cheaper?

Neither in general. Which is cheaper depends on your usage pattern relative to the rates offered, which is specific to your agreement and your consumption. What is general is that they fail differently: seat pricing drifts, usage pricing spikes.

Can I move between models?

Sometimes at renewal, if the vendor offers both. It is a commercial question rather than a contractual right, and it is worth asking during a renewal review rather than mid-term.

Put this against your own vendors

Record the term, the notice deadline, and the exit cost against the vendor once, and the next renewal review starts from an answer instead of a search. Free while in early access.

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These guides describe contract structures that are common across vendors. They do not state any named vendor's prices, terms, renewal behaviour, or negotiating position, because those vary by agreement and are not ours to publish. Any figure shown is labelled as illustrative and is not drawn from a real agreement. Nothing here is legal advice.