> ## Documentation Index > Fetch the complete documentation index at: https://docs.famulor.io/llms.txt > Use this file to discover all available pages before exploring further. # Credit balances & transfers > Track prepaid credits and fund customer workspaces Calling is prepaid. Every workspace has a credit balance, and completed calls reduce that balance according to the workspace's pricing. ## How balances change A balance can change when: * included plan credits are added, * the workspace buys a top-up, * calls use credits, or * a white-label reseller transfers credits to or from one of its customer workspaces. Every change appears in the balance history with its date, amount, reason, and any note supplied with a transfer. ## Transfer credits White-label workspace owners and admins can fund their customer workspaces from their own available balance. They can also reclaim unused credits, provided the customer workspace has enough remaining balance. Transfers are immediate and never allow either workspace to fall below zero. ## Buy additional credits Workspace owners can purchase top-up packages from **Billing**. Once payment is confirmed, the new credits appear in the active workspace. ## Where to see usage * **Customers** shows the balance for each customer workspace and provides the transfer action. * **Usage** shows your active workspace's consumption by day and by call. Balances are credits, not cash. Plan pricing and included usage are described in [Plans & limits](/admin/plans-and-limits) and [Minutes & billing](/billing/minutes).