Picto thématique

Rule n° 40 - The detailed sub-total is indicated before final validation of the order.

Transparency always benefits the user. A global price detailing taxes is good. A sub-total breaking down all costs is even better.

#e-commerce #Conception #Development


  • Provide users with details of the prices of their orders.
  • Remove an obstacle to order placement.


Indicate on the order summary form and before validation, the detailed subtotal of the cost of the product or service ordered.


In an online sales website:

  • Carry out a test order;
  • Check that there are detailed subtotals (quantities, amounts, costs, insurance, etc.) before validation.

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Business application and benefits

The rules should be applied to your projects from the design phase through to post-implementation , and they should be understood by all professionals with web and customer experience (CX) responsibilities: from strategy to operations, marketers to project managers, and editorial to technical staff. The benefits of using this ruleset are numerous, including improving customer satisfaction, web performance, and e-commerce, and expanding your client base, while also decreasing your errors and costs.

Multidisciplinary verticles - accessiiblity, SEO, e-commerce, ecodesign etc..- starting from the foundational Opquast base.

The objective of these rules and the Opquast community mission is ‘making the web better’ for your customers and for everyone! Opquast rules cover the key major areas of risk that can negatively affect website users such as privacy, ecodesign, accessibility and security.

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