Comcast Sheds 144,000 Broadband Subscribers in Q3

Comcast lost 144,000 residential broadband subscribers in the third quarter, a steeper decline than Wall Street expected and a signal that competitive pressure on the largest US cable operator is intensifying rather than easing.

The company ended September with 28.34 million domestic residential broadband customers, according to results reported from Washington on October 22, 2026. A year earlier the base stood at 28.90 million. The comparison shows the erosion is not a one-quarter wobble: Comcast has shed roughly 560,000 residential broadband customers over twelve months.

How bad was the quarter?

By two separate measures, the third quarter came in worse than expected. The 144,000-subscriber loss exceeded the consensus estimate. Analysts surveyed by FactSet had braced for a decline of about 116,800.

The result also marks an acceleration from the same period a year before. In the third quarter of 2025, Comcast lost 91,000 residential broadband customers. The new figure is nearly 60 percent larger than that prior-year loss, which itself had already been flagged as a warning sign for the cable sector.

For a company of Comcast's scale, the arithmetic matters more than the headline. A 144,000-customer loss represents roughly half of one percent of the base in a single quarter. Spread across a year, however, the trend compounds, and each departing subscriber takes recurring monthly revenue along.

Who is taking the customers?

The company's own account of the quarter points to two distinct competitive fronts. The first is fiber. Overbuilders and incumbent telcos expanding fiber-to-the-home networks continue to challenge cable's traditional dominance in fixed-line internet, particularly in markets where fiber operators can market symmetric upload and download speeds.

The second front is fixed wireless access. Mobile operators are selling home internet service delivered over their cellular networks, an offering that requires no construction, no truck roll beyond a self-install kit, and often a lower price. For price-sensitive households, fixed wireless has become an easy first step away from cable.

The two threats work differently, and that is what makes the combination difficult for cable operators. Fiber wins on performance and tends to pull the highest-value, heaviest-usage households. Fixed wireless wins on price and convenience, skimming customers at the value end of the market. Comcast sits between them, defending a network that is strong on download speeds but built on a technology generation that fiber rivals now outspec.

What does this mean going forward?

The quarterly number will feed an ongoing debate about whether cable's broadband losses are structural or cyclical. A loss that widens from 91,000 to 144,000 year over year, while beating analysts' pessimism, leans toward the structural reading. Investors and analysts will watch the next several quarters for evidence of whether the decline stabilizes or continues to steepen as fiber buildouts reach more of Comcast's footprint and fixed wireless carriers keep adding coverage and capacity.

For now, the third-quarter result sets the benchmark: 28.34 million residential broadband customers, a shrinking base, and competition that the company itself describes as continuing to challenge the cable business from both the fiber and wireless directions.