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)

AT&T provides deferred income taxes for temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the computed tax basis of those assets and liabilities. AT&T provides valuation allowances against the deferred tax assets (included, together with the deferred income tax assets, as part of the reportable net deferred income tax liabilities on the consolidated balance sheets), for which the realization is uncertain. AT&T reviews these items regularly in light of changes in federal and state tax laws and changes in the business.

AT&T has included the estimated impact of the recently enacted tax reform in the financial results at or for the period ended December 31, 2017. The Securities and Exchange Commission has issued guidance that provides a "measurement period" whereby registrants can provide a reasonable estimate of the tax reform impact in their financial statements but can adjust that amount during the measurement period (expected to be a year or less). AT&T’s future results could include additional adjustments, and those adjustments could be material.

As of January 1, 2017, AT&T adopted Accounting Standards Update (ASU) No. 2016-16, "Income Taxes (Topic 740)" (ASU 2016-16), with modified retrospective application, resulting in the recognition of an immaterial adjustment to retained earnings. Under ASU 2016-16, AT&T recognizes the income tax effects of intercompany sales or transfers of assets other than inventory (e.g., intellectual property or property, plant and equipment) during the period of intercompany sale or transfer instead of the period of either sale or transfer to a third party or recognition of depreciation or impairment.

Source: 10-K (filing date: 2018-02-20).

AT&T Inc., income tax expense (benefit), continuing operations

USD $ in millions

	12 months ended	Dec 31, 2017		Dec 31, 2016		Dec 31, 2015		Dec 31, 2014		Dec 31, 2013
	Federal
	State and local
	Foreign
	State, local and foreign
	Current
	Federal
	State and local
	Foreign
	State, local and foreign
	Deferred
	Income tax expense (benefit)

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

Item	Description	The company
Current	Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.	AT&T Inc.’s current increased from 2015 to 2016 but then declined significantly from 2016 to 2017.
Deferred	Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.	AT&T Inc.’s deferred declined from 2015 to 2016 and from 2016 to 2017.
Income tax expense (benefit)	Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.	AT&T Inc.’s income tax expense (benefit) declined from 2015 to 2016 and from 2016 to 2017.

AT&T Inc., effective income tax rate (EITR) reconciliation

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	Statutory federal income tax rate
	Effective tax rate

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

Item	Description	The company
Effective tax rate	Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.	AT&T Inc.’s effective tax rate declined from 2015 to 2016 and from 2016 to 2017.

AT&T Inc., components of deferred tax assets and liabilities

USD $ in millions

		Dec 31, 2017		Dec 31, 2016		Dec 31, 2015		Dec 31, 2014		Dec 31, 2013
	Depreciation and amortization
	Licenses and nonamortizable intangibles
	Employee benefits
	Deferred fulfillment costs
	Net operating loss and other carryforwards
	Other, net
	Subtotal
	Deferred tax assets valuation allowance
	Net deferred tax assets (liabilities)

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

Item	Description	The company
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.	AT&T Inc.’s net deferred tax assets (liabilities) declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.

AT&T Inc., deferred tax assets and liabilities, classification

USD $ in millions

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	Current deferred tax assets
	Noncurrent deferred tax assets
	Noncurrent deferred tax liabilities

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

Item	Description	The company
Noncurrent deferred tax assets	Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting and classified as noncurrent.	AT&T Inc.’s noncurrent deferred tax assets increased from 2015 to 2016 but then declined significantly from 2016 to 2017.
Noncurrent deferred tax liabilities	Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.	AT&T Inc.’s noncurrent deferred tax liabilities increased from 2015 to 2016 but then declined significantly from 2016 to 2017.

AT&T Inc., adjustments to financial data

USD $ in millions

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	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
	Less: Noncurrent 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 Attributable To AT&T
	Stockholders’ equity attributable to AT&T (as reported)
	Less: Net deferred tax assets (liabilities)
	Stockholders’ equity attributable to AT&T (adjusted)
	Adjustment to Net Income Attributable To AT&T
	Net income attributable to AT&T (as reported)
	Add: Deferred income tax expense (benefit)
	Net income attributable to AT&T (adjusted)

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

AT&T Inc., Financial Data: Reported vs. Adjusted

AT&T Inc., adjusted ratios

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	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: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

Ratio	Description	The company
Adjusted current ratio	A liquidity ratio calculated as adjusted current assets divided by adjusted current liabilities.	AT&T Inc.’s adjusted current ratio improved from 2015 to 2016 and from 2016 to 2017.
Adjusted net profit margin	An indicator of profitability, calculated as adjusted net income divided by total revenue.	AT&T Inc.’s adjusted net profit margin deteriorated from 2015 to 2016 and from 2016 to 2017.
Adjusted total asset turnover	An activity ratio calculated as total revenue divided by adjusted total assets.	AT&T Inc.’s adjusted total asset turnover improved from 2015 to 2016 but then deteriorated significantly from 2016 to 2017.
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.	AT&T Inc.’s adjusted financial leverage declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.
Adjusted ROE	A profitability ratio calculated as adjusted net income divided by adjusted shareholders’ equity.	AT&T Inc.’s adjusted ROE deteriorated from 2015 to 2016 but then improved from 2016 to 2017 exceeding 2015 level.
Adjusted ROA	A profitability ratio calculated as adjusted net income divided by adjusted total assets.	AT&T Inc.’s adjusted ROA deteriorated from 2015 to 2016 and from 2016 to 2017.

AT&T Inc., Ratios: Reported vs. Adjusted

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	As Reported
	Selected Financial Data (USD $ in millions)
	Current assets
	Current liabilities
	Ratio
	Current ratio¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted current assets
	Current liabilities
	Ratio
	Adjusted current ratio²

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

2017 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.	AT&T Inc.’s adjusted current ratio improved from 2015 to 2016 and from 2016 to 2017.

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	As Reported
	Selected Financial Data (USD $ in millions)
	Net income attributable to AT&T
	Operating revenues
	Ratio
	Net profit margin¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted net income attributable to AT&T
	Operating revenues
	Ratio
	Adjusted net profit margin²

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

2017 Calculations

¹ Net profit margin = 100 × Net income attributable to AT&T ÷ Operating revenues
= 100 × hidden ÷ hidden = hidden

² Adjusted net profit margin = 100 × Adjusted net income attributable to AT&T ÷ Operating 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.	AT&T Inc.’s adjusted net profit margin deteriorated from 2015 to 2016 and from 2016 to 2017.

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	As Reported
	Selected Financial Data (USD $ in millions)
	Operating revenues
	Total assets
	Ratio
	Total asset turnover¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Operating revenues
	Adjusted total assets
	Ratio
	Adjusted total asset turnover²

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

2017 Calculations

¹ Total asset turnover = Operating revenues ÷ Total assets
= hidden ÷ hidden = hidden

² Adjusted total asset turnover = Operating 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.	AT&T Inc.’s adjusted total asset turnover improved from 2015 to 2016 but then deteriorated significantly from 2016 to 2017.

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	As Reported
	Selected Financial Data (USD $ in millions)
	Total assets
	Stockholders’ equity attributable to AT&T
	Ratio
	Financial leverage¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted total assets
	Adjusted stockholders’ equity attributable to AT&T
	Ratio
	Adjusted financial leverage²

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

2017 Calculations

¹ Financial leverage = Total assets ÷ Stockholders’ equity attributable to AT&T
= hidden ÷ hidden = hidden

² Adjusted financial leverage = Adjusted total assets ÷ Adjusted stockholders’ equity attributable to AT&T
= 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.	AT&T Inc.’s adjusted financial leverage declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	As Reported
	Selected Financial Data (USD $ in millions)
	Net income attributable to AT&T
	Stockholders’ equity attributable to AT&T
	Ratio
	ROE¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted net income attributable to AT&T
	Adjusted stockholders’ equity attributable to AT&T
	Ratio
	Adjusted ROE²

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

2017 Calculations

¹ ROE = 100 × Net income attributable to AT&T ÷ Stockholders’ equity attributable to AT&T
= 100 × hidden ÷ hidden = hidden

² Adjusted ROE = 100 × Adjusted net income attributable to AT&T ÷ Adjusted stockholders’ equity attributable to AT&T
= 100 × hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted ROE	A profitability ratio calculated as adjusted net income divided by adjusted shareholders’ equity.	AT&T Inc.’s adjusted ROE deteriorated from 2015 to 2016 but then improved from 2016 to 2017 exceeding 2015 level.

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	As Reported
	Selected Financial Data (USD $ in millions)
	Net income attributable to AT&T
	Total assets
	Ratio
	ROA¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted net income attributable to AT&T
	Adjusted total assets
	Ratio
	Adjusted ROA²

Based on: 10-K (filing date: 2018-02-20), 10-K (filing date: 2017-02-17), 10-K (filing date: 2016-02-18), 10-K (filing date: 2015-02-20), 10-K (filing date: 2014-02-21).

2017 Calculations

¹ ROA = 100 × Net income attributable to AT&T ÷ Total assets
= 100 × hidden ÷ hidden = hidden

² Adjusted ROA = 100 × Adjusted net income attributable to AT&T ÷ 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.	AT&T Inc.’s adjusted ROA deteriorated from 2015 to 2016 and from 2016 to 2017.

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AT&T Inc. (T)

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

AT&T Inc., Financial Data: Reported vs. Adjusted

Adjusted Ratios: Removal of Deferred Taxes (Summary)

AT&T 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)