This article answers the question: if a product in a shared catalog has a custom price and the base price of the product changes (for example after a scheduled update), which price applies in the shared catalog?
If the custom price for a product in a shared catalog has been set to Percentage, the product’s shared catalog price is implicitly updated after changing the base price.
In other words, when the base price gets updated (via a normal or a scheduled update), the shared catalog price also changes after applying the percent discount.
If the custom price for a product in a shared catalog has been set to Fixed, the price in the shared catalog never changes – no matter the way we update the base price (via scheduled update, Adobe Commerce Admin, API, or importing).
If the product’s base price changes and becomes less than the corresponding shared catalog price, the Storefront displays the base price as the lowest price available in the system.
Set Pricing and Structure for a Shared Catalog in our user guide.