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Cal.com bills teams and organizations based on the number of seats used during each billing period. Depending on your plan, you may see one of two billing models in your billing settings: high water mark billing or active user billing.

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High water mark billing

With high water mark (HWM) billing, you are billed for the peak number of team members at any point during your billing cycle — not just the count at the end of the month. For example, if your team starts the month with 10 members, grows to 15 mid-month, then drops back to 12, you are billed for 15 seats that month.

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What you see in billing settings

When HWM billing is active, the Seat billing section appears on your team or organization billing page. It shows:
  • Current members — the number of members on your team right now
  • Peak seats this period — the highest member count recorded since the billing period started
  • Billed seats — the number of seats you are charged for (the higher of current members or peak seats, with a minimum of 1)
The billing period start date is displayed so you can see when the current tracking window began.

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Active user billing

With active user billing, you are billed based on how many team members were actively involved in bookings during the billing period — either as a host or an attendee.

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What you see in billing settings

When active user billing is enabled, the Active users section appears on your billing page. It shows:
  • Total members — everyone on your team
  • Active users — the number of members who hosted or attended at least one booking during the period
  • Minimum seats commitment — if your plan includes a minimum seat commitment, it appears here
  • Billed seats — the higher of your active user count or minimum seat commitment
You can also see a table listing each active user, their email, and whether they were active as a host or attendee. Selecting a user shows their bookings for the period.

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Viewing your seat billing details

1

Go to billing settings

Navigate to your Team Settings or Organization Settings and select Billing.
2

Review seat information

Scroll to the Seat billing or Active users section (depending on your billing model) to see your current usage and billed seats.
3

Manage your subscription

Select Billing portal to open Stripe, where you can update your payment method, view invoices, or make changes to your subscription.
Seat billing details only appear for teams and organizations on a paid plan. If you are on a free or trial plan, this section is not shown.

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How seat changes are tracked

Every time a member is added to or removed from your team, Cal.com logs the change. For high water mark billing, the system automatically checks whether the new member count exceeds the previous peak. If it does, the peak is updated. This ensures billing reflects the maximum number of seats used at any point in the period. Seat tracking resets at the start of each billing cycle.