The FFGI Methodology encompasses:
- Assessing Financial Institutions' approach to sustainability issues across 23 influential cross-cutting themes, including corruption, human rights, gender, and climate change;
- Assessing publicly available information on how financial institutions' (FIs) incorporate sustainability considerations into their operations;
- Research data compiled and used by civil society organizations to conduct constructive, evidence-based dialogue with key financial sector actors responsible for promoting sustainable financial policies and practices.
 
The Fair Finance Guide International Methodology is developed based on existing international standards and conventions such as those of the International Labour Organisation, as well as a range of other widely accepted guidelines in areas pertaining to responsible businesses such as the UNGPs, and responsible finance such as the Principles for Responsible Investment and the Equator Principles.