"Though Comcast doesn't disclose it specifically, analysts have estimated that Comcast's profit margins on broadband service are 80 percent or higher. In 2008,

"Though Comcast doesn't disclose it specifically, analysts have estimated that Comcast's profit margins on broadband service are 80 percent or higher. In 2008, Sanford C. Bernstein & Co. analyst Craig Moffett estimated Comcast's data margins at 80 percent, and Credit Suisse reported in fall 2010 that Comcast's gross margins on high-speed data were 93 percent." https://www.freepress.net/sites/default/files/resources/Comcast%20New%20Caps%20Factsheet_FINAL.pdf https://www.freepress.net/sites/default/files/resources/Comc...