Congress membership is about 4 million and spans the public and private sectors of the economy. It has 40 affiliate unions and 37 state councils. The affiliates also have corresponding structure in the states. However, the membership excludes the military and para-military services as well as some civil establishments that offer services classified by law as essential. An example is the Central Bank of Nigeria.
Nigeria's massive and dynamic informal sector is also largely unorganised although the modalities for its unionisation are now the subject of internal debates in the movement.