Commerce Price Rule

Price Rules allow store owners to customise product prices based on a variety of conditions, such as based on user role, product type or product variation type, for specific products or specific product variations, or other custom conditions such as the IP address or the country of the customer. When conditions are met, the product's price is calculated based on the defined calculation method which can be a percentage or fixed amount off the base product price, a price defined on a price list, or a custom solution.

How is this different to Promotions

Promotions do not change the base price of the product. Instead they change the order subtotal on the cart and checkout pages.

Price Rules change the base product price as it is displayed on product pages. Users do not have to do anything to get the special price because the conditions are automatically calculated. Users may not be necessarily aware of why they see the price they see (that may be developed as a future enhancement), and on a different visit where conditions are different, such logged out vs logged in, they may be displayed different base prices.

Also, have a look at https://www.drupal.org/node/2900583

How is this different to Price List

The Price Rule module was written as a more generic solution, of which price lists is a sub-case. It also adds conditions to the mix.

Installation and usage

Install as any module, preferrably via composer. Create one or more Price Rules, and make sure that you use the Calculated Price field formatter wherever you would like users to see the customised prices.

Development status

The module implements the first part of the architecture described at https://www.drupal.org/node/2899158. Search API integration may be added as a submodule. Price Lists are currently part of the main module, but to avoid creating tables on the database for users that don't need them it will likely be moved to a submodule. The core functionality should be expected to work and it has already been used in production for a large site, but it is still work in progress. Please test and let us know about any problems in the issue queue. We won't be supporting upgrade paths before reaching a release candidate version. If you have already installed a previous version and you want to get the latest code, you may have to uninstall the module, update the code and then install it again.