Quarterly report pursuant to Section 13 or 15(d)

Income Taxes

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Income Taxes
6 Months Ended
Jun. 30, 2016
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
We file a consolidated federal income tax return for all of our wholly-owned subsidiaries, including Sirius XM.  Income tax expense for the three months ended June 30, 2016 and 2015 was $108,260 and $45,421, respectively, and $217,603 and $184,350 for the six months ended June 30, 2016 and 2015, respectively. Our effective tax rate for the three and six months ended June 30, 2016 was 38.5% and 38.7%, respectively. We estimate our annual effective tax rate for the year ending December 31, 2016 will be 38.0%. Our effective tax rate for the three and six months ended June 30, 2015 was 30.6% and 46.9%, respectively, primarily due to the effect of a tax law change in the District of Columbia during the three months ended March 31, 2015 and in New York City during the three months ended June 30, 2015. The tax law change in the District of Columbia will reduce our future taxes and thus we will use less of certain net operating losses in the future which resulted in a $44,392 increase in our valuation allowance during the three months ended March 31, 2015. The tax law change in New York City will increase certain net operating losses to be utilized in the future which resulted in a $16,945 increase in our deferred tax asset during the three months ended June 30, 2015.
As of June 30, 2016 and December 31, 2015, we had a valuation allowance related to deferred tax assets of $47,773 and $49,095, respectively, that were not likely to be realized due to certain net operating loss limitations and acquired net operating losses that we were not more likely than not going to utilize.