> ## Documentation Index > Fetch the complete documentation index at: https://runinfra.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Top-up presets > Use the available top-up choices to add prepaid credits and restore a negative workspace balance. Top-up presets are checkout shortcuts for adding prepaid credits to your workspace. They are credit purchases, not plans or subscriptions. You can choose $10, $25, $50, $100, $250, or $500. You can also enter a custom amount or use automatic recharge. ## Add credits 1. Open [Settings > Cost](https://runinfra.ai/settings/cost#credits). 2. Select a preset or enter a custom amount. 3. Complete checkout. 4. After the payment succeeds, RunInfra adds the purchased credits to your workspace balance and records the purchase in credit activity. A successful paid top-up also increases your lifetime purchase total for [spend tiers](/docs/faq/spend-tiers). ## Recover a negative balance Work already in progress can settle after your balance reaches zero. This can leave a small negative balance and pause new billable work. When your balance is negative, the top-up prompt shows the minimum amount needed to return to zero. A successful top-up first offsets the negative amount. The negative-balance restriction clears only when the resulting balance is zero or higher. If the top-up adds more than the amount needed to reach zero, the remaining credits are available for new work. ## Automatic recharge Automatic recharge adds credits when your balance reaches the threshold you set. A successful automatic recharge follows the same balance and spend-tier rules as a manual top-up. It offsets any negative balance first and counts toward lifetime paid credit purchases. ## Related See how RunInfra links settled charges to exact usage. Review the prepaid billing model and negative-balance behavior.