T-Mobile's Three-Year Upside Depends More on Revenue Than a Rerating

T-Mobile shares could reach about $226.72 in three years under a scenario built on higher revenue, a stable net margin and a partial recovery in the price-to-earnings ratio. From the October 15 close of $157.03, that would be a 44.4% gain before dividends. It is a scenario, not a forecast, and most of the upside requires the business to keep expanding.

The model assumes revenue rises from $92.2 billion to $117 billion, net income reaches roughly $13.6 billion and the valuation moves from about 16.2 times earnings to 18 times. Its own attribution is revealing: 64.6% of the gain comes from selling more, while the higher multiple supplies most of the rest.

The operating case has support

T-Mobile reported second-quarter 2026 service revenue of $19.0 billion, up 9% from a year earlier. Postpaid service revenue rose 13%, adjusted free cash flow increased 4% to $4.8 billion and postpaid average revenue per account reached $152.91, up 2%. Those figures show that customer economics, not just headline subscriber additions, are carrying the story.

Management's February 2026 long-range update projected service revenue of about $77 billion for 2026 and $80.5 billion to $81.5 billion for 2027. It also expected adjusted free cash flow of $18.0 billion to $18.7 billion in 2026 and $19.5 billion to $20.5 billion in 2027. The three-year scenario therefore asks growth to extend beyond the company's published 2027 outlook.

Where the model can break

The most sensitive assumption is revenue. If annual growth were 6.2% instead of 8.2%, the modeled upside would fall to 36.5%. If the valuation stayed at roughly 16.2 times earnings instead of rising to 18.1 times, upside would shrink to 28.9%.

Margins also deserve attention. The trailing net margin was 11.5% through June 2026, down from 14.5% a year earlier. Integration costs related to UScellular affected reported profit, but continued margin pressure would make the scenario harder to reach even if service revenue grows.

The next quarterly report should be read for account additions, revenue per account, churn and free cash flow together. T-Mobile does not need a dramatic valuation rerating for the stock to work, but it does need years of execution. That makes the revenue path, rather than the $226.72 target itself, the useful part of the exercise.