> For the complete documentation index, see [llms.txt](https://options-docs-v2.avisplus.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://options-docs-v2.avisplus.io/pricing-and-upsell/add-charge-add-ons/add-charge-by-character.md).

# Add-charge by Character

The "Add-charge by Character" feature allows merchants to charge customers additional fees based on the number of characters entered by customers in a Single Line Text option. 

This feature is particularly useful for products that require customization, such as engraving, monogramming, or personalized messages. 

<figure><img src="/files/4rKRFPgfUuvdZ4ERWK4b" alt=""><figcaption></figcaption></figure>