Stock photography involves photographers submitting photos to agencies that license the photos for businesses and other clients to use. Agencies make money by charging clients licensing fees to use the photos and photographers typically earn $1-200 per photo licensed. Popular stock photo agencies include Getty Images, Corbis, and ShutterStock. To get started, photographers can upload photos to free sharing sites like MorgueFile to build their portfolio and get feedback before submitting to paid agencies. Photographers need to understand copyright and licensing issues to succeed in stock photography.