Usage tiers are assigned automatically. There's no deposit or purchase that moves you up, and you don't need to take any action.
If you need higher limits, you can request them in the Claude Console once you're using at least 50% of your current limits. You can view your tier and current limits in the Claude Console.
For custom limits or committed capacity, contact our sales team.
Refer to our Claude Platform Docs to read more about rate limits and usage tiers.