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## Resource: Introduction

## Article: About Additional Fees

## Article Link: https://dev.wix.com/docs/api-reference/business-solutions/e-commerce/extensions/additional-fees/introduction.md

## Article Content:

# About Additional Fees

Additional Fees enable businesses to add custom charges and fees to carts and checkouts based on business-specific calculations and logic. This functionality allows businesses to implement specialized fee structures like handling charges, processing fees, insurance costs, or any custom charges that need to be calculated dynamically during the purchase flow.

This section covers:

- **[Additional Fees Service Plugin](https://dev.wix.com/docs/rest/business-solutions/e-commerce/extensions/additional-fees/additional-fees-service-plugin/introduction.md)**: Integrate custom fee calculation logic with the eCommerce platform to add calculated fees to carts and checkouts.

## See also

- [About Extensions](https://dev.wix.com/docs/rest/business-solutions/e-commerce/extensions/introduction.md)
- [About Purchase Flow](https://dev.wix.com/docs/rest/business-solutions/e-commerce/purchase-flow/introduction.md) 
- [Extend the eCommerce Platform with Service Plugins](https://dev.wix.com/docs/rest/business-solutions/e-commerce/guides/extend-the-e-commerce-platform-with-service-plugins.md)