Income Tax Accounting Policy
Income Tax Expense (Benefit)
Effective Income Tax Rate (EITR)
Components of Deferred Tax Assets and Liabilities
Deferred Tax Assets and Liabilities, Classification
Analyst Adjustments: Removal of Deferred Taxes
Adjusted Ratios: Removal of Deferred Taxes (Summary)
Adjusted Current Ratio
Adjusted Net Profit Margin
Adjusted Total Asset Turnover
Adjusted Financial Leverage
Adjusted Return on Equity (ROE)
Adjusted Return on Assets (ROA)

Deferred tax assets and liabilities are recognized based on temporary differences between the financial statement and tax bases of assets and liabilities using enacted tax rates expected to be in effect when these differences are realized. A valuation allowance is recorded when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of a deferred tax asset depends on the ability to generate sufficient taxable income of the appropriate character and in the appropriate taxing jurisdictions within the carryforward periods available.

T-Mobile accounts for uncertainty in income taxes recognized in the financial statements in accordance with the accounting guidance for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. T-Mobile assesses whether it is more likely than not that a tax position will be sustained upon examination based on the technical merits of the position and adjusts the unrecognized tax benefits in light of changes in facts and circumstances, such as changes in tax law, interactions with taxing authorities and developments in case law.

Source: 10-K (filing date: 2019-02-07).

T-Mobile US Inc., income tax expense (benefit), continuing operations

US$ in millions

	12 months ended	Dec 31, 2018		Dec 31, 2017		Dec 31, 2016		Dec 31, 2015		Dec 31, 2014
	Federal
	State
	Puerto Rico
	Current tax expense (benefit)
	Federal
	State
	Puerto Rico
	Deferred tax expense (benefit)
	Income tax expense (benefit)

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

Item	Description	The company
Current tax expense (benefit)	Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.	T-Mobile US Inc.’s current tax expense (benefit) increased from 2016 to 2017 and from 2017 to 2018.
Deferred tax expense (benefit)	Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.	T-Mobile US Inc.’s deferred tax expense (benefit) declined from 2016 to 2017 but then increased from 2017 to 2018 exceeding 2016 level.
Income tax expense (benefit)	Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.	T-Mobile US Inc.’s income tax expense (benefit) declined from 2016 to 2017 but then increased from 2017 to 2018 exceeding 2016 level.

T-Mobile US Inc., effective income tax rate (EITR) reconciliation

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	Federal statutory income tax rate
	Change in valuation allowance
	State taxes, net of federal benefit
	Equity-based compensation
	Puerto Rico taxes, net of federal benefit
	Permanent differences
	Federal tax credits, net of reserves
	Other, net
	Effective income tax rate, before effect of law and rate changes
	Effect of law and rate changes
	Effective income tax rate

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

Item	Description	The company
Effective income tax rate, before effect of law and rate changes	Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.	T-Mobile US Inc.’s effective income tax rate, before effect of law and rate changes declined from 2016 to 2017 and from 2017 to 2018.

T-Mobile US Inc., components of deferred tax assets and liabilities

US$ in millions

		Dec 31, 2018		Dec 31, 2017		Dec 31, 2016		Dec 31, 2015		Dec 31, 2014
	Loss carryforwards
	Deferred rents
	Reserves and accruals
	Federal and state tax credits
	Debt fair market value adjustment
	Other
	Deferred tax assets, gross
	Valuation allowance
	Deferred tax assets, net
	Spectrum licenses
	Property and equipment
	Other intangible assets
	Other
	Deferred tax liabilities
	Net deferred tax assets (liabilities)

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

Item	Description	The company
Deferred tax assets, gross	Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.	T-Mobile US Inc.’s deferred tax assets, gross declined from 2016 to 2017 but then slightly increased from 2017 to 2018.
Deferred tax assets, net	Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.	T-Mobile US Inc.’s deferred tax assets, net declined from 2016 to 2017 but then increased from 2017 to 2018 not reaching 2016 level.
Net deferred tax assets (liabilities)	Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.	T-Mobile US Inc.’s net deferred tax assets (liabilities) increased from 2016 to 2017 but then slightly declined from 2017 to 2018 not reaching 2016 level.

T-Mobile US Inc., deferred tax assets and liabilities, classification

US$ in millions

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	Current deferred tax assets, net
	Non-current deferred tax liabilities, net

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

Item	Description	The company
Non-current deferred tax liabilities, net	Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.	T-Mobile US Inc.’s non-current deferred tax liabilities, net declined from 2016 to 2017 but then increased from 2017 to 2018 not reaching 2016 level.

T-Mobile US Inc., adjustments to financial data

US$ in millions

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	Adjustment to Current Assets
	Current assets (as reported)
	Less: Current deferred tax assets, net
	Current assets (adjusted)
	Adjustment to Total Assets
	Total assets (as reported)
	Less: Current deferred tax assets, net
	Total assets (adjusted)
	Adjustment to Total Liabilities
	Total liabilities (as reported)
	Less: Noncurrent deferred tax liabilities, net
	Total liabilities (adjusted)
	Adjustment to Stockholders’ Equity
	Stockholders’ equity (as reported)
	Less: Net deferred tax assets (liabilities)
	Stockholders’ equity (adjusted)
	Adjustment to Net Income
	Net income (as reported)
	Add: Deferred income tax expense (benefit)
	Net income (adjusted)

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

T-Mobile US Inc., Financial Data: Reported vs. Adjusted

T-Mobile US Inc., adjusted ratios

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	Current Ratio
	Reported current ratio
	Adjusted current ratio
	Net Profit Margin
	Reported net profit margin
	Adjusted net profit margin
	Total Asset Turnover
	Reported total asset turnover
	Adjusted total asset turnover
	Financial Leverage
	Reported financial leverage
	Adjusted financial leverage
	Return on Equity (ROE)
	Reported ROE
	Adjusted ROE
	Return on Assets (ROA)
	Reported ROA
	Adjusted ROA

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

Ratio	Description	The company
Adjusted current ratio	A liquidity ratio calculated as adjusted current assets divided by adjusted current liabilities.	T-Mobile US Inc.’s adjusted current ratio deteriorated from 2016 to 2017 but then slightly improved from 2017 to 2018.
Adjusted net profit margin	An indicator of profitability, calculated as adjusted net income divided by total revenue.	T-Mobile US Inc.’s adjusted net profit margin improved from 2016 to 2017 and from 2017 to 2018.
Adjusted total asset turnover	An activity ratio calculated as total revenue divided by adjusted total assets.	T-Mobile US Inc.’s adjusted total asset turnover improved from 2016 to 2017 and from 2017 to 2018.
Adjusted financial leverage	A measure of financial leverage calculated as adjusted total assets divided by adjusted total equity. Financial leverage is the extent to which a company can effect, through the use of debt, a proportional change in the return on common equity that is greater than a given proportional change in operating income.	T-Mobile US Inc.’s adjusted financial leverage declined from 2016 to 2017 and from 2017 to 2018.
Adjusted ROE	A profitability ratio calculated as adjusted net income divided by adjusted shareholders’ equity.	T-Mobile US Inc.’s adjusted ROE improved from 2016 to 2017 and from 2017 to 2018.
Adjusted ROA	A profitability ratio calculated as adjusted net income divided by adjusted total assets.	T-Mobile US Inc.’s adjusted ROA improved from 2016 to 2017 and from 2017 to 2018.

T-Mobile US Inc., Ratios: Reported vs. Adjusted

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	As Reported
	Selected Financial Data (US$ in millions)
	Current assets
	Current liabilities
	Ratio
	Current ratio¹
	Adjusted for Deferred Taxes
	Selected Financial Data (US$ in millions)
	Adjusted current assets
	Current liabilities
	Ratio
	Adjusted current ratio²

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

2018 Calculations

¹ Current ratio = Current assets ÷ Current liabilities
= hidden ÷ hidden = hidden

² Adjusted current ratio = Adjusted current assets ÷ Current liabilities
= hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted current ratio	A liquidity ratio calculated as adjusted current assets divided by adjusted current liabilities.	T-Mobile US Inc.’s adjusted current ratio deteriorated from 2016 to 2017 but then slightly improved from 2017 to 2018.

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	As Reported
	Selected Financial Data (US$ in millions)
	Net income
	Revenues
	Ratio
	Net profit margin¹
	Adjusted for Deferred Taxes
	Selected Financial Data (US$ in millions)
	Adjusted net income
	Revenues
	Ratio
	Adjusted net profit margin²

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

2018 Calculations

¹ Net profit margin = 100 × Net income ÷ Revenues
= 100 × hidden ÷ hidden = hidden

² Adjusted net profit margin = 100 × Adjusted net income ÷ Revenues
= 100 × hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted net profit margin	An indicator of profitability, calculated as adjusted net income divided by total revenue.	T-Mobile US Inc.’s adjusted net profit margin improved from 2016 to 2017 and from 2017 to 2018.

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	As Reported
	Selected Financial Data (US$ in millions)
	Revenues
	Total assets
	Ratio
	Total asset turnover¹
	Adjusted for Deferred Taxes
	Selected Financial Data (US$ in millions)
	Revenues
	Adjusted total assets
	Ratio
	Adjusted total asset turnover²

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

2018 Calculations

¹ Total asset turnover = Revenues ÷ Total assets
= hidden ÷ hidden = hidden

² Adjusted total asset turnover = Revenues ÷ Adjusted total assets
= hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted total asset turnover	An activity ratio calculated as total revenue divided by adjusted total assets.	T-Mobile US Inc.’s adjusted total asset turnover improved from 2016 to 2017 and from 2017 to 2018.

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	As Reported
	Selected Financial Data (US$ in millions)
	Total assets
	Stockholders’ equity
	Ratio
	Financial leverage¹
	Adjusted for Deferred Taxes
	Selected Financial Data (US$ in millions)
	Adjusted total assets
	Adjusted stockholders’ equity
	Ratio
	Adjusted financial leverage²

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

2018 Calculations

¹ Financial leverage = Total assets ÷ Stockholders’ equity
= hidden ÷ hidden = hidden

² Adjusted financial leverage = Adjusted total assets ÷ Adjusted stockholders’ equity
= hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted financial leverage	A measure of financial leverage calculated as adjusted total assets divided by adjusted total equity. Financial leverage is the extent to which a company can effect, through the use of debt, a proportional change in the return on common equity that is greater than a given proportional change in operating income.	T-Mobile US Inc.’s adjusted financial leverage declined from 2016 to 2017 and from 2017 to 2018.

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	As Reported
	Selected Financial Data (US$ in millions)
	Net income
	Stockholders’ equity
	Ratio
	ROE¹
	Adjusted for Deferred Taxes
	Selected Financial Data (US$ in millions)
	Adjusted net income
	Adjusted stockholders’ equity
	Ratio
	Adjusted ROE²

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

2018 Calculations

¹ ROE = 100 × Net income ÷ Stockholders’ equity
= 100 × hidden ÷ hidden = hidden

² Adjusted ROE = 100 × Adjusted net income ÷ Adjusted stockholders’ equity
= 100 × hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted ROE	A profitability ratio calculated as adjusted net income divided by adjusted shareholders’ equity.	T-Mobile US Inc.’s adjusted ROE improved from 2016 to 2017 and from 2017 to 2018.

		Dec 31, 2018	Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014
	As Reported
	Selected Financial Data (US$ in millions)
	Net income
	Total assets
	Ratio
	ROA¹
	Adjusted for Deferred Taxes
	Selected Financial Data (US$ in millions)
	Adjusted net income
	Adjusted total assets
	Ratio
	Adjusted ROA²

Based on: 10-K (filing date: 2019-02-07), 10-K (filing date: 2018-02-08), 10-K (filing date: 2017-02-14), 10-K (filing date: 2016-02-17), 10-K (filing date: 2015-02-19).

2018 Calculations

¹ ROA = 100 × Net income ÷ Total assets
= 100 × hidden ÷ hidden = hidden

² Adjusted ROA = 100 × Adjusted net income ÷ Adjusted total assets
= 100 × hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted ROA	A profitability ratio calculated as adjusted net income divided by adjusted total assets.	T-Mobile US Inc.’s adjusted ROA improved from 2016 to 2017 and from 2017 to 2018.

	T-Mobile US Inc.	Other companies (not purchased previously)
Financial Statements
Common-Size Financial Statements
Ratios
Relative Valuation
Discounted Cash Flow (DCF) Valuation
Economic Value Added (EVA)
Long-term Trends
Analysis
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Financial Statements
Common-Size Financial Statements
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Relative Valuation
Discounted Cash Flow (DCF) Valuation
Economic Value Added (EVA)
Long-term Trends
Analysis
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T-Mobile US Inc. (TMUS)

Analysis of Income Taxes

Income Tax Accounting Policy

Income Tax Expense (Benefit)

Effective Income Tax Rate (EITR)

Components of Deferred Tax Assets and Liabilities

Deferred Tax Assets and Liabilities, Classification

Analyst Adjustments: Removal of Deferred Taxes

T-Mobile US Inc., Financial Data: Reported vs. Adjusted

Adjusted Ratios: Removal of Deferred Taxes (Summary)

T-Mobile US Inc., Ratios: Reported vs. Adjusted

Adjusted Current Ratio

Adjusted Net Profit Margin

Adjusted Total Asset Turnover

Adjusted Financial Leverage

Adjusted Return on Equity (ROE)

Adjusted Return on Assets (ROA)