Starting next month, Amazon sellers utilizing Premium Shipping must comply with new delivery requirements, notably maintaining a 97% on-time delivery rate assessed over 30 days. From June 29, this requirement will decrease to 93.5% with weekly evaluations. Non-compliance will lead to warnings and eventual removal from the program. To succeed, sellers should collaborate with reliable carriers like UPS and FedEx and consistently fulfill orders. Additionally, changes to Seller Fulfilled Prime will mandate a minimum shipment of 100 packages monthly to avoid volume limits on Prime orders.

Source: https://www.supplychaindive.com/news/amazon-premium-shipping-2025-changes-sfp/749072/