Find the billing unit
Per-user, contact, event, task, token, storage and percentage-based pricing transfer different risks to the buyer. Ask what creates a charge and what is excluded.
A single business outcome may generate several billable events. Map the workflow before multiplying the published unit price.
Model three usage cases
Create current, next-milestone and peak-month scenarios. Include growth, retries, guests, test activity, archived records and seasonal spikes where they count.
Use ranges when usage is uncertain. A precise forecast built on an unknown event volume is false confidence.
Locate feature cliffs
SSO, audit logs, advanced permissions, API access, data retention and a single integration can sit on a much higher tier. Mark each must-have against the plan matrix.
Ask whether the feature is required now, required by policy or merely desirable. This prevents one preference from silently doubling cost.
Read commitment and overage terms
Compare monthly and annual commitments, renewal notice, minimum spend, overage behavior and what happens when limits are reached.
A discount is valuable only when the product has passed the workflow test and the organization can accept the commitment.
Add ownership and switching cost
Implementation, administration, training and migration are not subscription line items, but they affect total cost. Estimate internal hours and external services.
Document a future exit while data volume is still small. A cheap plan can become expensive when leaving requires a manual reconstruction.