BDO International is the fifth largest accountancy network in the world, a worldwide professional services network of public accountancy firms, serving national and international clients. As of 2013, BDO has Member Firms in 144 countries, employs 55,000 workers in 1,204 offices throughout the world.
Global Fee income of all BDO Member Firms for the year ending 30 September 2013 totalled € 4.92 billion (US$ 6.45 billion).
Each BDO Member Firm is an independent legal entity in its own country. The network, originally formed in 1963 as Binder Seidman International by firms from Canada, Germany, the Netherlands, UK and US, is coordinated by BDO Global Coordination B.V., with an office in Brussels, Belgium. The name BDO, first devised in 1973, is an acronym of Binder Dijker Otte & Co.