> For the complete documentation index, see [llms.txt](https://kenna-ai.gitbook.io/kenna-ai-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kenna-ai.gitbook.io/kenna-ai-docs/billing-and-credits/how-credits-work.md).

# How Credits Work

Every AI generation costs credits. The cost depends on the tool:

Free: Color Extractor. 2-credit tools: Recolor, Seamless Pattern, Remove Branding. 3-credit tools: Sketch to Image (Basic), Create Variation, Edit with AI (Basic), Convert to Line Art, Extract Product, Extract Graphics, Background, Apply Pattern, Generate Asset, Multiple Angles, Packaging.

5-credit tools: Sketch to Image (Pro), Edit with AI (Pro), Virtual Try-On, Relight, Upscale & Enhance, and Line Builder (charged per product body).

Credits reset to your plan's full amount on your monthly billing date. Unused credits do not roll over between billing periods. However, purchased credit packs do carry over and never expire.

You can check your remaining credits at the top of any page in the studio.