Starting today, you can split your shared costs within your AWS Cost Categories by defining Split Charge rules. AWS Cost Categories enables you to group your cost and usage information into meaningful categories based on dimensions such as accounts, tags, services, charge types, and even other Cost Categories. Every organization has a set of costs that are shared by multiple teams, business units, or financial owners, for instance, data transfer costs, enterprise support, or operational costs of a central infrastructure team. These costs are not directly attributable to a single owner, and so cannot be categorized into a singular Cost Category value. With Split Charge rules, you can now equitably allocate these costs across your Cost Category values.
Source:: Amazon AWS