T-Mobile US, Inc.

(NASDAQ Global Select)
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Somewhat Bearish -25

What Could Derail T-Mobile Stock?

Company update Financial outlook AI-generated analysis

📉 T-Mobile stock has lost 31.6% over the past twelve months, significantly underperforming the S&P 500 which returned 13.3%.

⚠️ Management warned that rising phone costs are forcing increased subsidies, threatening margins during the high-churn holiday season.

📊 Postpaid account churn rose to 1.09% in Q3 2026 from 0.97% a year earlier, indicating customer retention pressure.

💰 T-Mobile projects $76.8 billion in service revenue for 2026, an 8% increase over the prior year driven by postpaid growth.

📉 Gross margins compressed to 57.8% in Q4 2025 from 64.8% in Q3 2025 due to higher device costs and subsidies.

📈 The company raised its full-year postpaid ARPA growth forecast to approximately 3.5%, up from the previous 2.5% estimate.

🎯 Management expects postpaid account net additions of about 1 million for 2026 despite a volatile fourth quarter outlook.

📉 The stock trades at a P/E of 14.0x, which is lower than the S&P 500's 22.8x and near the low end of its historical range.

🔮 T-Mobile is expected to report its fourth quarter results in February 2027 following a staggered iPhone launch.

Bullish Signals
  • The company raised its forecast for full-year postpaid ARPA growth to about 3.5%, an increase from the previous estimate of 2.5%.
  • Management expects the postpaid business to lead growth with total service revenue reaching approximately $76.8 billion in 2026, up 8% from 2025.
  • The stock currently trades at a P/E ratio of 14.0x, which is significantly lower than the S&P 500's 22.8x and near the low end of its historical range since 2016.
Risk Factors
  • Management warned that rising phone costs are forcing increased subsidies, which could erode margins during the critical holiday season.
  • Postpaid account churn rose to 1.09% in Q3 2026 from 0.97% a year earlier, signaling increasing difficulty in retaining customers.
  • Gross margins compressed to 57.8% in Q4 2025 from 64.8% in Q3 2025 due to higher device costs and increased subsidies.
  • The stock has lost 31.6% over the past twelve months, underperforming the S&P 500 which returned 13.3% during the same period.
  • Management expects a less predictable fourth quarter with more variable competition and higher churn due to staggered iPhone launches.
Full Analysis
T-Mobile US (TMUS) faces near-term headwinds as management warns of rising phone subsidy costs and increased customer churn during the critical holiday season. On its October 28 earnings call, executives highlighted that higher device prices are forcing carriers to offer larger discounts, which could erode margins and make it harder to retain customers in a competitive fourth quarter. Despite these risks, T-Mobile expects its postpaid business to drive growth, projecting total service revenue of approximately $76.8 billion for 2026, representing an 8% increase from the previous year. The company has already seen signs of pressure with postpaid account churn rising to 1.09% in the third quarter compared to 0.97% a year earlier. Financial metrics reflect a stock that has underperformed significantly over the last twelve months, losing 31.6% while the broader market gained. Currently trading at a P/E ratio of 14.0x versus the S&P 500's 22.8x, the stock price appears to anticipate a difficult path ahead, with management expecting variable competition and higher churn rates in the upcoming quarter. Management has raised its full-year forecast for postpaid Average Revenue Per Account (ARPA) growth to roughly 3.5%, up from 2.5%. The key metric to monitor will be postpaid account net additions, which are expected to reach about 1 million for 2026, as the company navigates the challenges of expensive devices and a volatile holiday market.