Quick! What are the largest sources of revenue for nonprofit organizations? The public usually thinks the right answer is charitable giving, and this is certainly where most of the attention goes. But according to the Urban Institute’s Nonprofit Almanac 2008, 50 percent comes from fees for services and goods from private sources, and another 29.4 percent comes from government grants and fees for services. That’s nearly 80 percent of all of our revenue! Private contributions account for only a little more than 12 percent.