T-Mobile US Inc. (NASDAQ:TMUS)

The income tax expense exhibited significant fluctuations over the five-year period. A notable increase in both current and deferred tax expenses contributed to a substantial rise in total income tax expense from 2021 to 2023, followed by a stabilization in 2024 and 2025.

Current Tax Expense

Current tax expense began at US$130 million in 2021, decreased to US$64 million in 2022, and then increased to US$82 million in 2023. A substantial jump occurred in 2024, reaching US$253 million, with a further increase to US$425 million in 2025. This indicates a growing tax liability related to current taxable income.

Deferred Tax Expense

Deferred tax expense demonstrated a more dramatic pattern. Starting at US$197 million in 2021, it rose sharply to US$492 million in 2022, and then experienced a considerable increase to US$2,600 million in 2023. While remaining high, deferred tax expense decreased slightly to US$3,120 million in 2024 and then to US$2,864 million in 2025. This suggests significant changes in temporary differences between book and tax accounting, potentially related to asset valuations or liability recognition.

Total Income Tax Expense

Total income tax expense, the sum of current and deferred tax expenses, mirrored the trends of its components. It increased from US$327 million in 2021 to US$556 million in 2022, then surged to US$2,682 million in 2023. The expense remained elevated in 2024 at US$3,373 million, before decreasing modestly to US$3,289 million in 2025. The substantial increases in 2023 and 2024 warrant further investigation to understand the underlying drivers.

The deferred tax expense consistently represented a larger portion of the total income tax expense throughout the period, particularly from 2022 onwards. The fluctuations observed suggest potential impacts from changes in tax laws, accounting standards, or significant business transactions affecting the company’s tax position.

The effective income tax rate exhibited a notable upward trend over the observed period. While the U.S. federal statutory income tax rate remained constant at 21.00%, the effective income tax rate fluctuated, increasing from 9.80% in 2021 to 24.40% in 2023 before stabilizing around 23.00% in 2024 and 2025.

Effective Income Tax Rate Trend

In 2021, the effective income tax rate was significantly below the statutory rate, suggesting the presence of substantial tax benefits or credits reducing the company’s tax liability. A substantial increase was observed in 2022, rising to 17.70%, indicating a reduction in these benefits or a change in the company’s earnings mix. The rate continued to climb in 2023, reaching 24.40%, exceeding the statutory rate by 3.40 percentage points. This suggests a potential shift in the composition of income, possibly including items subject to different tax rates, or a decrease in tax-exempt income. The rate then moderated slightly in 2024 and 2025, settling at 22.90% and 23.00% respectively, indicating a relative stabilization of the factors influencing the effective tax rate.

The divergence between the statutory and effective tax rates highlights the impact of various factors influencing the company’s tax burden. These factors could include tax credits, deductions, state taxes differing from the federal rate, and the geographic distribution of earnings. The increasing trend in the effective tax rate warrants further investigation to understand the underlying drivers and potential implications for future profitability.

Potential Drivers of Change

The initial low effective tax rate in 2021 could be attributed to research and development tax credits, net operating loss carryforwards, or other tax planning strategies. The subsequent increases suggest a diminishing benefit from these strategies or a change in the company’s operational or financial structure. The stabilization in 2024 and 2025 may indicate that the company has reached a new equilibrium in its tax position.

Continued monitoring of the effective income tax rate is recommended to assess the sustainability of the current trend and to identify any potential risks or opportunities related to tax planning and compliance.

The composition of deferred tax assets and liabilities exhibits notable shifts over the five-year period. A general trend indicates a growing net deferred tax liability, increasing in magnitude each year. This is driven by changes in both deferred tax asset and deferred tax liability components.

Loss Carryforwards

Loss carryforwards, a significant component of gross deferred tax assets, initially increased from US$4,414 million in 2021 to US$6,641 million in 2022. Subsequently, these carryforwards decreased steadily over the following three years, reaching US$2,537 million in 2025. This decline suggests a reduction in the amount of past losses available to offset future taxable income.

Lease Liabilities

Deferred tax liabilities related to lease liabilities remained relatively stable, fluctuating between US$7,781 million and US$8,837 million throughout the period. The initial increase from 2021 to 2022 was followed by a slight decrease, with values remaining consistent in the later years.

Reserves and Accruals

Reserves and accruals contributing to deferred tax assets demonstrated a moderate increase from US$1,280 million in 2021 to US$1,526 million in 2022, followed by a decline to US$958 million in 2024. A slight recovery to US$1,160 million was observed in 2025.

Other Deferred Tax Assets & Liabilities

The ‘Other’ category for both deferred tax assets and liabilities showed considerable fluctuation. Deferred tax assets in this category decreased from US$3,292 million in 2021 to US$2,932 million in 2025. Deferred tax liabilities in the ‘Other’ category experienced a more moderate decline, moving from US$1,283 million to US$739 million over the same period.

Gross Deferred Tax Assets

Gross deferred tax assets peaked at US$21,726 million in 2022 before declining to US$14,443 million in 2025. This decrease is attributable to the combined effect of reductions in loss carryforwards, reserves and accruals, and the ‘Other’ category.

Valuation Allowance

The valuation allowance against deferred tax assets has consistently decreased from US$435 million in 2021 to US$240 million in 2025. This suggests increasing confidence in the realization of deferred tax assets.

Spectrum Licenses

Deferred tax liabilities related to spectrum licenses represent the largest component of total deferred tax liabilities and have consistently increased from US$18,060 million in 2021 to US$20,105 million in 2025. This continuous growth significantly contributes to the overall increase in net deferred tax liabilities.

Property and Equipment

Deferred tax liabilities associated with property and equipment increased substantially from US$380 million in 2021 to US$6,399 million in 2025. This represents a significant increase in deferred tax liabilities related to this asset class.

Lease Right-of-Use Assets

Deferred tax liabilities related to lease right-of-use assets decreased gradually from US$6,761 million in 2021 to US$6,543 million in 2025, though the change is relatively small compared to other components.

Net Deferred Tax Assets (Liabilities)

The net deferred tax position transitioned from a liability of US$10,216 million in 2021 to a liability of US$19,583 million in 2025. This increasing net liability is primarily driven by the growth in deferred tax liabilities, particularly those related to spectrum licenses and property and equipment, outpacing the changes in deferred tax assets.

Deferred tax liabilities exhibited a consistent upward trend over the five-year period. The values increased annually from 2021 to 2025, indicating a growing difference between the tax basis and financial reporting basis of assets and liabilities.

Overall Trend

A clear increasing trend is observed in deferred tax liabilities. The magnitude of the increase appears to be accelerating over time.

Year-over-Year Changes

The increase from 2021 to 2022 was approximately 6.5% (US$668 million). The increase from 2022 to 2023 was approximately 23.6% (US$2,574 million), a significantly larger increase. From 2023 to 2024, the liabilities grew by approximately 24.1% (US$3,242 million). Finally, from 2024 to 2025, the increase was approximately 17.3% (US$2,883 million). While still substantial, the percentage increase slowed slightly in the final year of the observed period.

Magnitude of Increase

The absolute dollar increase in deferred tax liabilities grew substantially from 2021-2023, then moderated somewhat in 2024-2025. This suggests that the initial drivers of the increase may have been particularly impactful in the earlier years, and subsequent increases reflect continued, but less dramatic, changes in the underlying temporary differences.

Final Value

By December 31, 2025, deferred tax liabilities reached US$19,583 million, nearly doubling from the US$10,216 million reported as of December 31, 2021.

The consistent growth in deferred tax liabilities warrants further investigation to understand the underlying causes, such as changes in accounting methods, acquisitions, or differences in depreciation methods between financial reporting and tax purposes. The accelerating growth in the earlier part of the period, followed by a slight moderation, suggests evolving factors influencing the deferred tax position.

The financial information reveals adjustments made to reported figures, primarily concerning deferred tax assets and liabilities. These adjustments impact both the balance sheet and the income statement over the observed period. A consistent pattern emerges where reported liabilities are reduced and reported stockholders’ equity is increased through these adjustments.

Total Liabilities

Reported total liabilities demonstrate a generally increasing trend from $137,461 million in 2021 to $160,034 million in 2025. However, the adjusted total liabilities exhibit a more moderate increase, starting at $127,245 million in 2021 and reaching $140,451 million in 2025. The difference between reported and adjusted liabilities widens initially, then narrows between 2023 and 2024, before expanding again in 2025. This suggests a fluctuating impact from the deferred tax adjustments on the overall liability position.

Stockholders’ Equity

Reported stockholders’ equity shows a decline from $69,102 million in 2021 to $59,203 million in 2025. Conversely, adjusted stockholders’ equity remains relatively stable, moving from $79,318 million in 2021 to $78,786 million in 2025. The consistent positive adjustment to equity indicates the removal of deferred tax liabilities, which directly boosts the reported equity value. The stability of the adjusted equity suggests the deferred tax adjustments are offsetting the decline in other equity components.

Net Income

Reported net income fluctuates over the period, with a low of $2,590 million in 2022 and a high of $11,339 million in 2024, ending at $10,992 million in 2025. Adjusted net income consistently exceeds reported net income in each year. The adjusted net income also exhibits a similar trend to the reported net income, but with higher values. The difference between reported and adjusted net income increases significantly from $198 million in 2021 to $3,120 million in 2024, before decreasing slightly to $2,864 million in 2025. This indicates that the removal of deferred tax expenses or the recognition of deferred tax benefits is positively impacting reported earnings.

In summary, the adjustments related to deferred taxes consistently increase both net income and stockholders’ equity while moderating the growth of total liabilities. The magnitude of these adjustments varies year to year, but the overall effect is a more favorable financial presentation when considering the impact of removing deferred tax items.

The financial metrics demonstrate a consistent pattern when deferred taxes are removed from the calculations. Generally, the adjusted ratios exhibit slightly higher values than their reported counterparts, indicating that deferred tax assets and liabilities have a suppressing effect on reported profitability and returns. Over the observed period, a clear upward trend emerges in most adjusted ratios, particularly from 2021 to 2024, followed by a slight moderation in 2025.

Profitability

Reported net profit margin increased substantially from 3.25% in 2022 to 13.93% in 2024, before decreasing slightly to 12.45% in 2025. The adjusted net profit margin mirrors this trend, starting at 3.87% in 2022, peaking at 17.76% in 2024, and then declining to 15.69% in 2025. The difference between reported and adjusted margins remains relatively stable, suggesting a consistent impact from deferred taxes on reported earnings. The adjusted margins consistently exceed the reported margins, indicating that recognizing deferred tax items reduces reported profitability.

Leverage

Reported financial leverage shows a steady increase from 2.99 in 2021 to 3.70 in 2025. Conversely, adjusted financial leverage remains comparatively stable, ranging from 2.60 to 2.78 over the same period. The removal of deferred tax impacts results in a lower leverage ratio, suggesting that deferred tax liabilities contribute to the reported leverage position. The difference between reported and adjusted leverage widens slightly over time, indicating a growing impact from deferred taxes on the reported leverage.

Returns on Equity (ROE)

Reported ROE follows a similar trajectory to net profit margin, increasing significantly from 3.72% in 2022 to 18.37% in 2024, and then decreasing to 18.57% in 2025. The adjusted ROE exhibits the same pattern, starting at 3.83% in 2022, reaching 18.43% in 2024, and declining to 17.59% in 2025. The adjusted ROE consistently exceeds the reported ROE, indicating that deferred tax items reduce reported returns to equity holders. The difference between reported and adjusted ROE remains relatively consistent.

Returns on Assets (ROA)

Reported ROA increases from 1.23% in 2022 to 5.45% in 2024, before decreasing to 5.01% in 2025. The adjusted ROA mirrors this trend, starting at 1.46% in 2022, peaking at 6.95% in 2024, and then declining to 6.32% in 2025. Similar to the other ratios, the adjusted ROA consistently exceeds the reported ROA, indicating that deferred tax items reduce reported returns on assets. The difference between reported and adjusted ROA remains relatively consistent.

In summary, the adjustments for deferred taxes consistently result in improved profitability and returns metrics, and a lower leverage ratio. The trends observed in the adjusted ratios suggest a period of significant improvement from 2022 to 2024, followed by a slight moderation in 2025. The consistent difference between reported and adjusted figures highlights the ongoing impact of deferred tax accounting on the reported financial position.

The period under review demonstrates significant fluctuations and overall growth in both reported and adjusted net income, which are reflected in corresponding profit margin trends. A notable divergence exists between reported and adjusted figures, suggesting the impact of specific adjustments to net income. The adjusted net profit margin consistently exceeds the reported net profit margin throughout the analyzed timeframe.

Reported Net Profit Margin

The reported net profit margin began at 3.77% in 2021, decreased to 3.25% in 2022, and then experienced substantial growth, reaching 10.59% in 2023. This upward momentum continued into 2024, with the margin peaking at 13.93%, before slightly declining to 12.45% in 2025. The initial decrease followed by strong growth indicates potential shifts in operational efficiency or external economic factors impacting reported earnings.

Adjusted Net Profit Margin

The adjusted net profit margin followed a similar pattern to the reported margin, starting at 4.02% in 2021 and decreasing to 3.87% in 2022. However, the subsequent increase was more pronounced, reaching 13.90% in 2023. The margin further increased to 17.76% in 2024, representing the highest value in the observed period, and then decreased to 15.69% in 2025. The consistently higher adjusted margin suggests that the adjustments made to net income positively impact profitability.

Relationship Between Reported and Adjusted Margins

The difference between the reported and adjusted net profit margins remained relatively stable between 0.25% and 0.30% in 2021 and 2022. However, this difference widened considerably in 2023, 2024, and 2025, reaching 3.31%, 3.83%, and 3.24% respectively. This expansion indicates that the adjustments made to net income are having an increasingly significant effect on the overall profitability picture. Further investigation into the nature of these adjustments would be beneficial.

Overall Trend

Despite a slight dip in the final year, an overall upward trend is evident in both reported and adjusted net profit margins. The substantial growth observed from 2022 to 2024 suggests successful strategic initiatives or favorable market conditions. The slight decrease in 2025 warrants monitoring to determine if it represents a temporary fluctuation or the beginning of a new trend.

An examination of the financial information reveals trends in stockholders’ equity and associated financial leverage ratios over a five-year period. Reported stockholders’ equity generally decreased from 2021 to 2025, while adjusted stockholders’ equity exhibited more stability. Correspondingly, reported financial leverage increased consistently, whereas adjusted financial leverage remained relatively flat with a slight increase in the final year.

Stockholders’ Equity

Reported stockholders’ equity began at US$69.102 billion in 2021 and declined to US$59.203 billion by 2025, representing an overall decrease of approximately 14.3%. Adjusted stockholders’ equity started at US$79.318 billion in 2021, experienced a dip to US$78.173 billion in 2023, and then showed a modest recovery, reaching US$78.786 billion in 2025. The difference between reported and adjusted equity suggests the presence of items impacting reported equity that are adjusted for in the latter calculation.

Reported Financial Leverage

Reported financial leverage demonstrated a consistent upward trend, increasing from 2.99 in 2021 to 3.70 in 2025. This indicates a growing proportion of financing derived from debt relative to equity, as measured by reported figures. The increase suggests a greater reliance on financial leverage over the period.

Adjusted Financial Leverage

Adjusted financial leverage remained comparatively stable throughout the period, fluctuating between 2.60 and 2.78. It began at 2.60 in 2021, peaked at 2.66 in 2023, experienced a slight decrease in 2024, and then rose to 2.78 in 2025. The relative stability of this metric, despite the decline in reported equity, suggests that the adjustments made to equity are mitigating the impact on the leverage ratio. The final year’s increase warrants further investigation.

The divergence between the trends in reported and adjusted financial leverage highlights the significance of the adjustments made to stockholders’ equity. The consistent increase in reported leverage, coupled with the stable adjusted leverage, suggests that the adjustments are related to items that reduce reported equity but are considered less indicative of true financial risk when evaluating leverage.

Reported net income demonstrates volatility over the observed period. Initially decreasing from 3,024 US$ million in 2021 to 2,590 US$ million in 2022, it experiences substantial growth in subsequent years, peaking at 11,339 US$ million in 2024 before a slight decline to 10,992 US$ million in 2025. Adjusted net income mirrors this trend, exhibiting similar fluctuations and overall growth, consistently exceeding reported net income. Stockholders’ equity, based on reported figures, generally declines from 69,102 US$ million in 2021 to 59,203 US$ million in 2025. Conversely, adjusted stockholders’ equity remains relatively stable, fluctuating between 78,173 US$ million and 80,540 US$ million throughout the period.

Reported Return on Equity (ROE)

Reported ROE shows a decrease from 4.38% in 2021 to 3.72% in 2022, coinciding with the decline in reported net income. A significant increase is then observed, rising to 12.85% in 2023 and further to 18.37% in 2024, driven by the substantial growth in reported net income. The ROE remains high in 2025 at 18.57%, indicating sustained profitability relative to reported equity.

Adjusted Return on Equity (ROE)

Adjusted ROE follows a similar pattern to the reported ROE, though with slightly lower values. It decreases from 4.06% in 2021 to 3.83% in 2022, then increases to 13.97% in 2023 and 18.43% in 2024. A slight decrease to 17.59% is noted in 2025. The consistency between reported and adjusted ROE suggests that adjustments to net income and stockholders’ equity have a relatively proportional impact on the calculated return.

The divergence between reported and adjusted ROE, while not substantial, suggests that adjustments made to net income and stockholders’ equity are impacting the overall return calculation. The stability of adjusted stockholders’ equity, in contrast to the declining reported equity, contributes to the higher adjusted ROE values. The overall trend indicates improving profitability relative to equity, particularly from 2022 onwards, as evidenced by the increasing ROE values.

The period under review demonstrates a notable progression in both reported and adjusted net income, alongside corresponding increases in return on assets. While reported net income fluctuates, adjusted net income consistently shows growth, particularly from 2022 onwards. This trend is reflected in the ROA figures, with adjusted ROA consistently exceeding reported ROA throughout the observed timeframe.

Reported Net Income

Reported net income decreased from US$3,024 million in 2021 to US$2,590 million in 2022, representing a decline. However, a substantial increase is then observed, rising to US$8,317 million in 2023, and continuing to US$11,339 million in 2024. A slight decrease to US$10,992 million is noted in 2025.

Adjusted Net Income

Adjusted net income exhibits a more consistent upward trajectory. It increased from US$3,221 million in 2021 to US$3,082 million in 2022, followed by significant growth to US$10,917 million in 2023. This positive trend continues with US$14,459 million in 2024 and US$13,856 million in 2025.

Reported Return on Assets (ROA)

Reported ROA mirrors the fluctuations in reported net income. It decreased from 1.46% in 2021 to 1.23% in 2022. A substantial increase is then observed, reaching 4.00% in 2023, and further increasing to 5.45% in 2024. A slight decrease to 5.01% is recorded in 2025.

Adjusted Return on Assets (ROA)

Adjusted ROA demonstrates a consistent upward trend. It increased from 1.56% in 2021 to 1.46% in 2022, then shows significant growth to 5.26% in 2023. This upward momentum continues with 6.95% in 2024 and 6.32% in 2025. The adjusted ROA consistently exceeds the reported ROA across all observed years.

The divergence between reported and adjusted net income, and consequently ROA, suggests the presence of items impacting reported earnings that are adjusted for in the calculation of adjusted net income. The sustained growth in adjusted ROA indicates improving profitability relative to the asset base, even with a slight decrease in the most recent year. The overall trend suggests a strengthening financial performance when considering adjusted figures.