Comcast makes money by charging households and businesses a monthly fee to connect to the internet, watch video, and use wireless service. Its Xfinity brand pipes broadband into roughly 31 million American homes. Its Sky brand does the same across the United Kingdom and Italy. On top of that connectivity business, Comcast owns NBC and Telemundo broadcast networks, the Peacock streaming service, Universal Pictures film studios, and Universal theme parks. Every month, tens of millions of customers pay a recurring subscription fee, which means Comcast collects revenue whether or not a single new customer signs up that day. The diagram below traces where the money goes.
Five years of financial data tell a story that is simultaneously stable and stagnant. Revenue climbed from $116.4 billion in 2021 to $123.7 billion in 2025, a gain of roughly $7 billion over four years. That sounds like growth, but the last two years show revenue completely flat at $123.7 billion. The business is large, but it is not expanding in any obvious way right now.
Free cash flow, which is the money left over after the company pays its operating costs and capital spending, tells a more complicated story. It dropped from $20.0 billion in 2021 to $15.5 billion in 2024, then jumped back to $21.9 billion in 2025. That 2025 jump was partly helped by the $9.4 billion pre-tax gain Comcast recorded when it sold its stake in Hulu. Strip out that one-time event and the underlying cash generation looks less dramatic. Operating cash flow, which excludes capital spending, rose to $33.6 billion in 2025, the strongest figure in the five-year window.
Debt is the number that deserves a close look. Net debt rose from $86.1 billion in 2021 to $91.8 billion in 2024, then edged down slightly to $89.5 billion in 2025. For a company that generates roughly $27 billion to $34 billion in operating cash each year, that debt load is manageable but it is not small. Interest expense reached $4.4 billion in 2025, money that flows out the door before shareholders see a cent.
Underneath the stable headline numbers, two forces are pulling in opposite directions. The old video cable business is shrinking fast. Comcast lost 1.253 million domestic video customers in 2025 alone, and now has 11.3 million left, down from 12.5 million the year before. Video revenue fell to $26.4 billion in 2025. That decline is not reversing. At the same time, broadband remains the core profit engine, and the Comcast Business segment, which serves small companies and large enterprises, grew revenue 5.5 percent to $10.2 billion in 2025. Wireless lines added 1.479 million customers in 2025 to reach 9.3 million total, a fast-growing but still small piece of the whole.
Comcast's wireless service works this way. It does not own cell towers. Instead it pays Verizon to use Verizon's network, then sells wireless plans under the Xfinity Mobile brand. This keeps upfront costs lower but means Comcast pays access fees that grow as more customers join. Direct product costs, which include those network access fees and the cost of devices sold, rose 14.7 percent in 2025 to $7.6 billion across the Connectivity and Platforms business.
The Versant separation matters for what it signals. Comcast is deliberately cutting away the parts of the media business that depend on traditional cable subscribers, a group that keeps shrinking. What remains after the separation is a company that bets heavily on broadband as its foundation, Peacock as its streaming future, and theme parks as a growing physical entertainment business. Epic Universe, a new Universal theme park in Orlando, opened in May 2025. Theme Parks revenue grew 14.2 percent to $9.8 billion in 2025 as a result.
Peacock is the piece of the story with the most unresolved questions. The streaming service brought in $5.4 billion in revenue in 2025, up from $4.9 billion in 2024. But it cost $6.5 billion to run in 2025. Peacock is losing money. Paid subscribers grew from 36 million to 44 million in 2025, a meaningful jump, but a big portion of that growth came from customers who received Peacock as part of a bundle from a third party, not from customers actively choosing to pay for Peacock on its own.
The risks Comcast faces are specific and documented. Sports rights are the biggest cost pressure. Comcast holds agreements covering the NBA through the 2035 to 2036 season, the NFL through the 2033 to 2034 season, and the Olympics through 2036. These are valuable but expensive. If those rights costs rise faster than advertising and subscription revenue, profit margins shrink. Second, traditional video customers are leaving at a steady pace and that trend is described in the company's own filings as expected to continue. Third, fiber competitors including AT&T and Verizon are building faster networks directly into Comcast's service areas. Domestic broadband customers fell by 711,000 in 2025 to 31.3 million, the second straight year of losses. Government subsidies are funding some of those competing fiber buildouts, which Comcast cannot control. Fourth, a major cyberattack or data breach could disrupt operations and damage the company's reputation. Fifth, new federal or state rules on broadband pricing could limit what Comcast charges.
Broadband penetration dropped from 49.8 percent in 2024 to 47.6 percent in 2025. That single metric captures the core competitive tension: Comcast passes more homes than ever, 65 million at the end of 2025, but a shrinking share of those homes choose Comcast for internet. The company responded in 2025 by simplifying its broadband pricing and offering a free wireless line for one year to new and existing customers. Its own filings note this will negatively affect average broadband revenue per customer in the near term.