OECD is funded by its member countries. National contributions are based on a formula which takes account of the size of each member's economy. 

Countries may also make voluntary contributions to financially support outputs in the OECD programme of work.

The size of OECD's budget and its programme of work are determined on a two-year basis by member countries. The Organisation's planning, budgeting and management are all organised on a results-based system.

Independent external auditing of the Organisation’s accounts and financial management is performed by a Supreme Audit Institution of an OECD member country, appointed by the Council.

Unlike the World Bank or the International Monetary Fund, OECD does not dispense grants or make loans.