> ## Documentation Index > Fetch the complete documentation index at: https://docs.vantage.sh/llms.txt > Use this file to discover all available pages before exploring further. # Cost Allocation > Welcome to the Cost Allocation learning track on Vantage University! ## What Is Cost Allocation? Cost allocation is the process of assigning costs to different parts of an organization, such as teams, projects, or business units, to accurately track and manage expenses. In Vantage, cost allocation is built on virtual tags. Virtual tags allow you to create consistent and standardized tags across all cloud providers within Vantage. You can tag costs without needing to make changes to your existing cloud infrastructure. Virtual tags are useful for ensuring uniform tagging practices. With [nested virtual tags](/tagging#nested-virtual-tags), you can also build hierarchies, such as mapping applications to teams and teams to business units, and then view that allocation in Cost Reports. ## Why Should I Use Cost Allocation? Using virtual tags in Vantage helps you gain better control over your cloud spending. Virtual tags ensure consistent and accurate cost tagging across all cloud providers, making your financial reporting more reliable. Nested virtual tags let you organize that tagged data into a hierarchy that mirrors your organization, so you can allocate costs effectively and find costs that have not been assigned an owner. ## Cost Allocation Use Cases As a **financial analyst**, you can: * Use **virtual tags** to standardize tagging across all cloud providers without involving the engineering team, ensuring that your financial reports are uniform and reliable. * Use **nested virtual tags** to roll tagged costs up to business units or cost centers, then group a Cost Report by that tag to see which costs still lack an owner. This improves financial accountability by ensuring no costs are overlooked in your financial reports. As a **cloud operations manager**, you can: * Use **virtual tags** for tag consolidation. You may manage a large infrastructure with an inconsistent tagging schema. You also need reports that help you quickly filter and group cloud resources to identify cost-saving opportunities and optimize resource usage, such as changing instance types or selected databases. * Use **nested virtual tags** to map costs to the different cloud operations teams and their corresponding applications you are responsible for, providing a detailed and organized view of cost distribution across your division. ## Lesson 1: Introduction to Tagging