Business units Business units are parts of your organization that are in charge of certain operations, such as Finance, HR, IT, and so on. Business units typically comprise departments and are associated with a company. By default, the IT chart of accounts includes a segment for business units, departments, and vendors, which are companies with the Vendor option selected. With this chart of accounts setup, you can allocate expenses to specific business units, departments, or vendors, or have expense allocations roll up to them. You can configure both departments and companies as part of user management. Create business unitsCreate a business unit to define your organizational functions. A business unit is also necessary to set up the top-most segment in the IT chart of accounts to create rollup rules and have expenses roll up to these business units.