Which invoice feature allows tracking costs in a project based on a quote?

The feature that allows tracking costs in a project based on a quote is sales invoicing. When you create a sales invoice in Xero, it can reference quotes that have been generated for a project. This association helps to maintain accurate financial records by ensuring that the costs associated with the project are in line with what was initially proposed in the quote. Sales invoicing also enables users to manage and monitor payments against the quoted project, allowing for better project budget management and financial forecasting.

Tasks and Expenses creation, while helpful for managing project-related tasks and tracking expenses, does not directly link to the invoice tracking function. Similarly, expense reports and time tracking are useful components of project management but do not directly involve tracking costs against invoices based on quotes. Therefore, sales invoicing is the most relevant feature when it comes to tracking project costs as per a quote.