A nonprofit organization (NPO) or non-profit organisation, also known as a non-business entity, or nonprofit institution, is a legal entity organized and operated for a collective, public or social benefit, in contrary with an entity that operates as a business aiming to generate a profit for its owners. A nonprofit is subject to the non-distribution constraint: any revenues that exceed expenses must be committed to the organization's purpose, not taken by private parties. An array of organizations are nonprofit, including some political organizations, schools, business associations, churches, social clubs, and consumer cooperatives. Nonprofit entities may seek approval from governments to be tax-exempt, and some may also qualify to receive tax-deductible contributions, but an entity may incorporate as a nonprofit entity without securing tax-exempt status.

Key aspects of nonprofits are accountability, trustworthiness, honesty, and openness to every person who has invested time, money, and faith into the organization. Nonprofit organizations are accountable to the donors, founders, volunteers, program recipients, and the public community. Theoretically, for a nonprofit that seeks to finance its operations through donations, public confidence is a factor in the amount of money that a nonprofit organization is able to raise. Supposedly, the more a nonprofit focuses on their mission, the more public confidence they will gain. This will result in more money for the organization. The activities a nonprofit is partaking in can help build the public's confidence in nonprofits, as well as how ethical the standards and practices are.