From the Olympic Charter, section 15...

The IOC is an international non-governmental not-for-profit organisation, of unlimited
duration, in the form of an association with the status of a legal person, recognised by the Swiss Federal Council in accordance with an agreement entered into on 1 November 2000.


From Wikipedia...

Revenue
The Olympic Movement generates revenue through five major programs. The International Olympic Committee (IOC) manages broadcast partnerships and the TOP worldwide sponsorship program. The Organizing Committees for the Olympic Games (OCOGs) manage domestic sponsorship, ticketing and licensing programs within the host country under the direction of the IOC. The Olympic Movement generated a total of more than US$4 billion in revenue during the most recent Olympic quadrennium (2001-2004). Revenue distribution
The IOC distributes some of Olympic marketing revenue to organizations throughout the Olympic Movement to support the staging of the Olympic Games and to promote the worldwide development of sport. The IOC retains approximately 8% of Olympic marketing revenue for the operational and administrative costs of governing the Olympic Movement.