Why Does Comcast Have So Much Debt? Its $90 Billion Balance Sheet Explained
Comcast carries a large debt load because it spent decades buying major businesses, building networks and financing long-lived assets. The biggest jump came with its 2018 acquisition of Sky.
Comcast reported $90.4 billion of total debt at June 30, 2026. Most of that debt came from financing large acquisitions and long-term investment, not from routine Xfinity operating losses.
Sky was the biggest single driver. Comcast paid about $39.4 billion for Sky in 2018 and financed much of the deal with new borrowing. Comcast’s total debt rose from about $64.6 billion at the end of 2017 to $111.7 billion at the end of 2018.
Why Comcast has so much debt
Comcast used debt to help finance major deals, including NBCUniversal and Sky. Those transactions added businesses, assets and cash flow, but they also increased borrowings.
Xfinity requires steady spending on fiber backhaul, nodes, gateways, line extensions and DOCSIS upgrades. Comcast’s Connectivity & Platforms capital expenditures were $8.7 billion in 2025.
Comcast also owns theme parks, studios and international telecom assets, all of which require continuing investment.
Comcast uses cash for debt reduction, capital spending, dividends and share repurchases rather than sending every available dollar to bondholders.
Sky and NBCUniversal explain much of the increase
Comcast paid £30.2 billion for Sky, about $39.4 billion using exchange rates at the time. The financing included $27 billion of senior notes, about $8.7 billion of sterling term loans and another $3 billion term loan.
Sky also brought existing debt onto Comcast’s consolidated balance sheet. Comcast said Sky had about $11 billion of indebtedness when the deal closed.
NBCUniversal added debt before Sky. In 2013, Comcast paid about $16.7 billion for General Electric’s remaining 49% stake in NBCUniversal and bought related real estate for another $1.4 billion. That transaction also used a mix of senior debt, commercial paper, credit facilities and cash.
For more on how those businesses fit into the company now, see our guide to Comcast’s planned split between Xfinity and its media assets.
Comcast still spends billions on its network
Acquisitions explain the biggest debt jumps, but Comcast’s broadband business still requires heavy investment.
In 2025, Comcast reported $8.7 billion of capital expenditures in Connectivity & Platforms. That included customer equipment, network capacity, line extensions and other infrastructure.
Xfinity mainly uses hybrid fiber-coaxial infrastructure. Our guide to how Xfinity’s cable-and-fiber network works explains where fiber ends and coax begins, while our DOCSIS 3.1 explainer covers the cable technology Comcast uses to deliver gigabit-class service over existing coaxial lines.
| 2025 Connectivity & Platforms capex | Amount | Main use |
|---|---|---|
| Customer premises equipment | $2.19bn | Gateways and equipment installed at customer locations. |
| Scalable infrastructure | $3.16bn | Network capacity and technology upgrades. |
| Line extensions | $2.69bn | Extending the network to more homes and businesses. |
| Support capital | $0.69bn | Other operational and infrastructure spending. |
During the first half of 2026, Comcast generated about $15.0 billion of operating cash flow while spending $5.3 billion on capital expenditures. It also paid dividends, repurchased shares and reduced debt.
Is Comcast’s debt a problem?
The debt is large and carries a real cost. Comcast paid about $1.84 billion of cash interest in the first six months of 2026 and $3.87 billion during 2025.
At the same time, Comcast generated $33.6 billion of operating cash flow in 2025. Most of its debt is fixed-rate, and a large portion does not mature for many years.
S&P still rates Comcast investment grade at A-, although it placed the rating on CreditWatch Negative in June 2026 after Comcast announced its proposed corporate split.
The key point is that a large debt number does not automatically mean financial distress. Cash flow, interest costs, maturity dates and access to capital all matter.
For customers, debt matters mainly if it starts constraining investment or service quality. Our Xfinity Internet review looks at the service itself, including pricing, speeds and customer fit.
The bottom line
Comcast has so much debt mainly because it borrowed to buy large companies and build long-lived infrastructure. Sky was the biggest single contributor to the jump, while NBCUniversal financing and continued network investment also played a role.
Comcast’s debt is still substantial at $90.4 billion, but it has been falling. The company reported about $111.7 billion of debt at the end of 2018 and had reduced that by more than $21 billion by June 2026.
Comcast debt FAQs
How much debt does Comcast have?
Comcast reported $90.4 billion of total debt at June 30, 2026, down from $98.9 billion at December 31, 2025.
Why does Comcast have so much debt?
The main reasons are large acquisitions, especially Sky and NBCUniversal, plus years of investment in broadband networks, theme parks and other long-lived assets.
Is Comcast’s debt a problem?
The debt is significant and produces billions of dollars of annual interest expense, but Comcast still generates substantial operating cash flow and remains investment grade.
Did buying Sky cause Comcast’s debt to rise?
Yes. Comcast paid about $39.4 billion for Sky in 2018 and financed much of the purchase with new debt. Total debt rose from about $64.6 billion at the end of 2017 to about $111.7 billion at the end of 2018.
Sources
- Comcast: Form 10-Q for the quarter ended June 30, 2026 — debt, cash flow, repayments, interest and capital spending
- Comcast: 2025 Form 10-K — debt structure, interest rates, capital expenditure and shareholder returns
- Comcast: 2018 Form 10-K — Sky purchase price and acquisition financing
- Comcast: 2013 filing — NBCUniversal transaction financing
- Comcast: Debt disclosure as of June 30, 2026
- S&P Global Ratings: Comcast A- rating placed on CreditWatch Negative following proposed split, June 29, 2026