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An upgrade describes the process of a customer switching to a higher-priced option, including:
  1. Switching to a higher tier.
  2. Switching to a longer commitment.
  3. Increasing the unit quantity (e.g. increasing the seat count).
  4. Adding an add-on.
  5. Increasing the quantity of a specific add-on.
When a customer upgrades their subscription in the middle of their billing cycle, they’re immediately charged the prorated amount of the upgraded subscription until the end of the current billing cycle. This means that the customer gets access to their higher-priced option and will be charged the difference for the rest of the billing period immediately.
When updating a subscription manually via the Stigg app, you can override the default proration and billing anchor behavior. See Updating subscriptions for details.