This paper provides a series of simple tools to help parties to the UNFCCC consider what should count towards the target of $100 billion per year of climate finance by 2020.

We distill the debate into five key variables that have emerged as relevant to what parties consider to "count" as climate finance:

• Motivation – the extent to which a financial flow was explicitly designed to reduce greenhouse gas emissions or support climate adaptation.

• Concessionality / source – the legitimacy of public versus private sources of climate finance, and the degree of 'softness' of the finance reflecting the benefit to the recipient compared to a loan at market rate. (To simplify categorisation and facilitate debate we combine 'source' with 'concessionality', though recognise this is imperfect).

• Causality – the extent to which a contributor’s intervention, whether public finance or policy, can be said to have mobilised further investment in climate-relevant activities.

• Geographic origin

• Recipient