# Storage (Characters) - Add Ons
### Storage (Characters) Re-Billing
Build your offer to sell additional storage (characters) to your clients.
**FAQ - Storage Re-Billing**\
How does storage re-billing work?
* When a client runs out of characters in their storage sub-account's storage balance and needs to add more information to an AI agent's knowledge base ,they can purchase more characters from your agency at whatever profit margin you set.
How are my client's charged?
* When a client purchases more storage from you, their wallet will be deducted with the amount you set. Example: If you are charging your client $10/mo for an additional 1M characters of storage, their wallet balance is reduced by $10 and 1M characters are reduced from your storage balance and transferred to their sub-account's storage balance.
How am I (the agency) charged?
* The amount of storage the client purchases will be deducted from your storage balance.
Will my credit card be charged?
* No, the $5/month cost (per 1M characters) will be deducted from your wallet balance.
What is 1M characters equivalent to?
* 1 million characters of storage is roughly equal to 100 website pages, or about 2,500 pages from a book.
Example Scenario
* A client wants to upload thousands of documents or scrape thousands of web pages and add all of that data to an AI agent's knowledge base. In this scenario where they might exceed the default amount of storage (characters) provided in their plan, they can purchase more characters from you for the amount you set. Their wallet balance is reduced, and their storage balance increases.
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