Income Tax Expense (Benefit)
Effective Income Tax Rate (EITR)
Components of Deferred Tax Assets and Liabilities
Analyst Adjustments: Removal of Deferred Taxes
Adjusted Ratios: Removal of Deferred Taxes (Summary)
Adjusted Net Profit Margin
Adjusted Financial Leverage
Adjusted Return on Equity (ROE)
Adjusted Return on Assets (ROA)

Comcast Corp., 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
	Foreign
	Current expense
	Federal
	State
	Foreign
	Deferred expense (benefit)
	Income tax expense (benefit)

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

Item	Description	The company
Current expense	Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.	Comcast Corp.’s current expense declined from 2015 to 2016 and from 2016 to 2017.
Deferred expense (benefit)	Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.	Comcast Corp.’s deferred expense (benefit) increased from 2015 to 2016 but then declined significantly 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.	Comcast Corp.’s income tax expense (benefit) increased from 2015 to 2016 but then declined significantly from 2016 to 2017.

Comcast Corp., effective income tax rate (EITR) reconciliation

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	Federal statutory tax rate
	Effective income tax rate

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

Item	Description	The company
Effective income tax rate	Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.	Comcast Corp.’s effective income tax rate declined from 2015 to 2016 and from 2016 to 2017.

Comcast Corp., 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
	Net operating loss carryforwards
	Differences between book and tax basis of investments
	Nondeductible accruals and other
	Deferred tax assets, gross
	Valuation allowance
	Deferred tax assets, net
	Differences between book and tax basis of property and equipment and intangible assets
	Differences between book and tax basis of investments
	Differences between book and tax basis of long-term debt
	Differences between book and tax basis of foreign subsidiaries and undistributed foreign earnings
	Deferred tax liabilities
	Net deferred tax asset (liability)

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

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.	Comcast Corp.’s deferred tax assets, gross declined from 2015 to 2016 and from 2016 to 2017.
Deferred tax assets, net	Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.	Comcast Corp.’s deferred tax assets, net increased from 2015 to 2016 but then declined significantly from 2016 to 2017.
Net deferred tax asset (liability)	Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.	Comcast Corp.’s net deferred tax asset (liability) declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.

Comcast Corp., adjustments to financial data

USD $ in millions

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	Adjustment to Total Liabilities
	Total liabilities (as reported)
	Less: Noncurrent deferred tax liabilities, net
	Total liabilities (adjusted)
	Adjustment to Total Comcast Corporation Shareholders’ Equity
	Total Comcast Corporation shareholders’ equity (as reported)
	Less: Net deferred tax assets (liabilities)
	Total Comcast Corporation shareholders’ equity (adjusted)
	Adjustment to Net Income Attributable To Comcast Corporation
	Net income attributable to Comcast Corporation (as reported)
	Add: Deferred income tax expense (benefit)
	Net income attributable to Comcast Corporation (adjusted)

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

Comcast Corp., Financial Data: Reported vs. Adjusted

Comcast Corp., adjusted ratios

		Dec 31, 2017	Dec 31, 2016	Dec 31, 2015	Dec 31, 2014	Dec 31, 2013
	Net Profit Margin
	Reported net profit margin
	Adjusted net profit margin
	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: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

Ratio	Description	The company
Adjusted net profit margin	An indicator of profitability, calculated as adjusted net income divided by total revenue.	Comcast Corp.’s adjusted net profit margin improved from 2015 to 2016 and 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.	Comcast Corp.’s adjusted financial leverage increased from 2015 to 2016 but then slightly declined from 2016 to 2017.
Adjusted ROE	A profitability ratio calculated as adjusted net income divided by adjusted shareholders’ equity.	Comcast Corp.’s adjusted ROE improved from 2015 to 2016 and from 2016 to 2017.
Adjusted ROA	A profitability ratio calculated as adjusted net income divided by adjusted total assets.	Comcast Corp.’s adjusted ROA improved from 2015 to 2016 and from 2016 to 2017.

Comcast Corp., 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)
	Net income attributable to Comcast Corporation
	Revenue
	Ratio
	Net profit margin¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted net income attributable to Comcast Corporation
	Revenue
	Ratio
	Adjusted net profit margin²

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

2017 Calculations

¹ Net profit margin = 100 × Net income attributable to Comcast Corporation ÷ Revenue
= 100 × hidden ÷ hidden = hidden

² Adjusted net profit margin = 100 × Adjusted net income attributable to Comcast Corporation ÷ Revenue
= 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.	Comcast Corp.’s adjusted net profit margin 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)
	Total assets
	Total Comcast Corporation shareholders’ equity
	Ratio
	Financial leverage¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Total assets
	Adjusted total Comcast Corporation shareholders’ equity
	Ratio
	Adjusted financial leverage²

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

2017 Calculations

¹ Financial leverage = Total assets ÷ Total Comcast Corporation shareholders’ equity
= hidden ÷ hidden = hidden

² Adjusted financial leverage = Total assets ÷ Adjusted total Comcast Corporation shareholders’ 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.	Comcast Corp.’s adjusted financial leverage increased from 2015 to 2016 but then slightly declined 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 Comcast Corporation
	Total Comcast Corporation shareholders’ equity
	Ratio
	ROE¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted net income attributable to Comcast Corporation
	Adjusted total Comcast Corporation shareholders’ equity
	Ratio
	Adjusted ROE²

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

2017 Calculations

¹ ROE = 100 × Net income attributable to Comcast Corporation ÷ Total Comcast Corporation shareholders’ equity
= 100 × hidden ÷ hidden = hidden

² Adjusted ROE = 100 × Adjusted net income attributable to Comcast Corporation ÷ Adjusted total Comcast Corporation shareholders’ equity
= 100 × hidden ÷ hidden = hidden

Ratio	Description	The company
Adjusted ROE	A profitability ratio calculated as adjusted net income divided by adjusted shareholders’ equity.	Comcast Corp.’s adjusted ROE 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 Comcast Corporation
	Total assets
	Ratio
	ROA¹
	Adjusted for Deferred Taxes
	Selected Financial Data (USD $ in millions)
	Adjusted net income attributable to Comcast Corporation
	Total assets
	Ratio
	Adjusted ROA²

Based on: 10-K (filing date: 2018-01-31), 10-K (filing date: 2017-02-03), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-27), 10-K (filing date: 2014-02-12).

2017 Calculations

¹ ROA = 100 × Net income attributable to Comcast Corporation ÷ Total assets
= 100 × hidden ÷ hidden = hidden

² Adjusted ROA = 100 × Adjusted net income attributable to Comcast Corporation ÷ 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.	Comcast Corp.’s adjusted ROA improved from 2015 to 2016 and from 2016 to 2017.

	Comcast Corp.	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
Financial Reporting Quality

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Financial Statements
Common-Size Financial Statements
Ratios
Relative Valuation
Discounted Cash Flow (DCF) Valuation
Economic Value Added (EVA)
Long-term Trends
Analysis
Financial Reporting Quality

Comcast Corp. (CMCSA)

Analysis of Income Taxes

Income Tax Expense (Benefit)

Effective Income Tax Rate (EITR)

Components of Deferred Tax Assets and Liabilities

Analyst Adjustments: Removal of Deferred Taxes

Comcast Corp., Financial Data: Reported vs. Adjusted

Adjusted Ratios: Removal of Deferred Taxes (Summary)

Comcast Corp., Ratios: Reported vs. Adjusted

Adjusted Net Profit Margin

Adjusted Financial Leverage

Adjusted Return on Equity (ROE)

Adjusted Return on Assets (ROA)