Amazon has been looking for new ways to operate, like expanding its retail footprint to real-life businesses like Kohl's and Whole Foods. This new free shipping option for business members makes a lot of sense; it puts Amazon squarely up against office supply retailers like Office Depot and Staples, as well as big box stores like Sam's Club and Costco.

The new membership scales according to the size of your business, with annual memberships coming in at $499 for up to 10 users, $1299for up to 100 users and $10,099 for more than that. Once you've chosen a tier, everyone on your business account will be notified of the new free shipping options, and any new users will be added automatically. "Business Prime Shipping enables businesses with multiple users to further simplify their procurement procedures and increasingly rely on Amazon Business to deliver," said Amazon VP Prentis Wilson in a statement. "Customers can now get unlimited fast delivery across their organization on a vast selection of products while maintaining increased visibility on their business purchases."