What Could T-Mobile Stock Be Worth In Three Years? Trefis Team Fri, October 16, 2026 at 10:00 AM EDT 4 min read TMUS +1.06% ^GSPC -0.00% T +0.55% VZ +0.73% CMCSA +1.58% Explore stocks on Coinbase Trading disclosure Trading disclosure The above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for certain activity generated through this link. Prices displayed are informational.
T-Mobile US (TMUS) stock lost 30.1% over the year to October 15, 2026, dividends included. During the same period, the S&P 500 gained 17.9%. The decline has left a company still growing its sales priced below its own historical baseline: the shares currently trade at 16.2 times earnings, against an average of 21.9 across its last twelve fiscal quarter-ends. So how much of that lost ground could T-Mobile win back over the next three years?
What T-Mobile Shares Would Be Worth On These Assumptions
Under these assumptions, T-Mobile shares would be worth about $226.72 in three years, compared with $157.03 at the October 15, 2026 close. That represents a 44.4% gain before dividends, and it would return the shares to about their highest close of the past year, reached on October 20, 2025.
Here is the scenario beside T-Mobile's figures today.
Most of the gain, 64.6%, would come from T-Mobile selling more. A higher P/E accounts for most of the remainder. The company saw revenue grow in fiscal Q2 2026 on growth in its postpaid business, and management said postpaid service revenue rose 13% that quarter. The higher P/E is a Trefis assumption rather than a finding: the scenario moves today's multiple 40% of the way back toward its own past, capping that historical baseline at 1.3 times today's P/E.
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T-Mobile Has To Keep Adding Accounts And Charging More
To achieve that gain, T-Mobile has to keep adding customers and getting more from each one. So far, its sales growth has accelerated. Revenue grew 0.7% in the twelve months to June 2024 and 6.3% in the twelve months to June 2025. Over the twelve months to June 2026, revenue grew 9.7%, a pace faster than the scenario assumes for the next three years.
T-Mobile added 277,000 postpaid accounts in fiscal Q2 2026. Management's fiscal 2026 guidance, issued in a July 23 release, includes postpaid net account additions of 950,000 to 1,050,000. That estimate sits alongside targets for profit, cash flow and capital spending. Management also expects revenue per postpaid account to grow 2.5% to 3% in fiscal 2026.
In July, management said it expected about 250,000 net postpaid account additions in fiscal Q3 2026, the quarter that ended in September. It also noted that its rate plan modernization is expected to lift account churn for a while.
How Does T-Mobile's Upside Change In Different Scenarios?
Each row below changes one assumption and keeps the other two as in the scenario.
Net margin of 12.1% in year three instead of 11.6%
T-Mobile starts from a lower net margin than usual. Its net margin was 11.5% over the twelve months to June 2026, against an average of 12.1% at the twelve quarter-ends from June 2023 to March 2026. The margin has fallen at each quarter-end since the twelve months to June 2025, when it was 14.5%.
Taken one at a time, revenue could shrink 4.2% a year for three years before the share price ends where it started. That compares with revenue growth of 9.7% in the twelve months to June 2026. The net margin could fall to 8.1%, against 11.5% today, with the same result. The same holds for a P/E of 12.4, compared with 16.2 today.
Most of the gain in this scenario would come from T-Mobile selling more. Its twelve-month revenue growth is the measure to watch, starting with the fiscal Q3 2026 report, which is still to come.
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