This document discusses the methodology used by the EU to track biodiversity-related expenses in its budget from 2014-2020. It summarizes that the EU has committed to tracking biodiversity spending to help further mainstream biodiversity into the budget. The methodology uses "Rio markers" to categorize spending into projects that support biodiversity conservation, sustainable use, and benefit-sharing. Data is presented showing billions of Euros allocated across several EU funds towards biodiversity-related objectives each year. The tracking system is identified as an effective tool for "green budgeting," and upcoming work is noted to adapt it for the next EU budget period and incorporate lessons learned.