The total size of the sector, including nonprofits that are not registered as charities, is much larger, but there are no comprehensive counts of their size or number. The number of charitable organizations has been increasing at a significant pace. Charitable nonprofits come in a range of sizes, with different organizational and legal structures, and provide a wide variety of services to different groups of individuals. Most of their revenue comes from governments. Religious organizations account for a large proportion of all organizations, but are far smaller on average than other charities.
Religious organizations depend heavily on donations and volunteer support.
Other charities include a diverse array of social service and community service organizations. This includes some large, national organizations, and many very small units. Almost half of their revenue comes from governments, while 13 percent of their receipts are from individual and corporate donations. Government is the most important stakeholder in charities, accounting for 60 percent of all revenues. While donations account for a modest share of all revenues, individuals also make an important contribution through their volunteer labor, and corporations provide in-kind gifts of time and supplies.