AWS provides best practices for tagging resources to facilitate cost tracking, automation, and organization, but ensuring consistent implementation across all projects can be challenging. This article discusses utilizing Policy as Code to enforce tagging strategies and Infrastructure as Code techniques to automate the application of tags across resources, ensuring adherence to organizational policies. Tags are key/value labels that help manage, search, and filter AWS resources and can include technical, automation, business, and security tags based on business requirements. The article demonstrates how to apply and enforce tagging policies using Pulumi's policy packs and highlights an automated approach to inject tags into AWS resources using global stack transformations, eliminating manual errors and simplifying the tagging process. The approach not only ensures compliance with tagging requirements but also streamlines the management of AWS resources by automatically applying necessary tags, thus reducing manual effort and potential oversight.