Income Taxes	9 Months Ended
Oct. 04, 2015
Income Taxes	Q. Income Taxes The effective tax rate for the three months ended October 4, 2015 and September 28, 2014 was 18.3% and 17.6%, respectively. The effective tax rates for these periods were lower than the expected federal statutory rate of 35% primarily because of the favorable effect of statutory rates applicable to income earned outside the United States. The tax rate for the three months ended October 4, 2015 was increased by additions to the uncertain tax positions for transfer pricing included in the projected annual effective tax rate, partially offset by $3.3 million of discrete tax benefits composed of $1.8 million of benefit attributable to a United States Tax Court opinion regarding intercompany cost sharing arrangements, $0.6 million of reductions in uncertain tax positions resulting from the expiration of statutes and $0.9 million from other discrete tax benefits. The tax rate for the three months ended September 28, 2014 was increased by $5.6 million of discrete tax expense composed of $7.2 million of additions to the uncertain tax positions for transfer pricing net of $0.9 million of discrete tax benefits resulting from increases in credit carry forwards and $0.7 million from other discrete tax benefits. The effective tax rate for the nine months ended October 4, 2015 and September 28, 2014 was 20.9% and 15.9%, respectively. The effective tax rates for these periods were lower than the expected federal statutory rate of 35% primarily because of the favorable effect of statutory rates applicable to income earned outside the United States. The tax rate for the nine months ended October 4, 2015 was increased by additions to the uncertain tax positions for transfer pricing included in the projected annual effective tax rate, partially offset by $5.0 million of discrete tax benefits composed of $1.8 million of benefit attributable to a United States Tax Court opinion regarding intercompany cost sharing arrangements, $1.3 million of reductions in uncertain tax positions resulting from the expiration of statutes and the settlement of an audit, $0.9 million from disqualifying dispositions of incentive stock options and employee stock purchase plan shares and $1.0 million from other discrete tax benefits. The tax rate for the nine months ended September 28, 2014 was increased by $2.6 million of discrete tax expense composed of $7.2 million of additions to the uncertain tax positions for transfer pricing net of $1.7 million of discrete tax benefits from disqualifying dispositions of incentive stock options and employee stock purchase plan shares, $0.9 million of discrete tax benefits resulting from increases in credit carry forwards and $2.0 million from other discrete tax benefits. On a quarterly basis, Teradyne evaluates the realizability of the deferred tax assets by jurisdiction and assesses the need for a valuation allowance. As of October 4, 2015, Teradyne believes that it will ultimately realize the deferred tax assets recorded on the condensed consolidated balance sheet. However, should Teradyne believe that it is more likely than not that the deferred tax assets would not be realized, the tax provision would increase in the period in which Teradyne determined that the realizability was not likely. Teradyne considers the probability of future taxable income and historical profitability, among other factors, in assessing the realizability of the deferred tax assets. As of October 4, 2015 and December 31, 2014, Teradyne had $33.3 million and $30.4 million, respectively, of reserves for uncertain tax positions. The $2.9 million net increase in reserves for uncertain tax positions relates primarily to transfer pricing exposures. As of October 4, 2015, Teradyne anticipated the liability for uncertain tax positions could decrease by approximately $0.1 million over the next twelve months, primarily as a result of the expiration of statutes of limitations. The potential decrease is related to transfer pricing exposures. Teradyne recognizes interest and penalties related to income tax matters in income tax expense. As of October 4, 2015 and December 31, 2014, $0.3 million and $0.6 million, respectively, of interest and penalties were included in the reserve for uncertain tax positions. Teradyne qualifies for a tax holiday in Singapore by fulfilling the requirements of an agreement with the Singapore Economic Development Board under which certain headcount and spending requirements must be met. The tax savings due to the tax holiday for the nine months ended October 4, 2015 was $9.9 million, or $0.05 per diluted share. The tax savings due to the tax holiday for the nine months ended September 28, 2014 was $12.3 million, or $0.05 per diluted share. The tax holiday is currently expected to expire on December 31, 2015. Teradyne is in discussion with the Singapore Economic Development Board with respect to extension of the tax holiday for periods after December 31, 2015.

Q. Income Taxes

The effective tax rate for the three months ended October 4, 2015 and September 28, 2014 was 18.3% and 17.6%, respectively. The effective tax rates for these periods were lower than the expected federal statutory rate of 35% primarily because of the favorable effect of statutory rates applicable to income earned outside the United States. The tax rate for the three months ended October 4, 2015 was increased by additions to the uncertain tax positions for transfer pricing included in the projected annual effective tax rate, partially offset by $3.3 million of discrete tax benefits composed of $1.8 million of benefit attributable to a United States Tax Court opinion regarding intercompany cost sharing arrangements, $0.6 million of reductions in uncertain tax positions resulting from the expiration of statutes and $0.9 million from other discrete tax benefits.

The tax rate for the three months ended September 28, 2014 was increased by $5.6 million of discrete tax expense composed of $7.2 million of additions to the uncertain tax positions for transfer pricing net of $0.9 million of discrete tax benefits resulting from increases in credit carry forwards and $0.7 million from other discrete tax benefits.

The effective tax rate for the nine months ended October 4, 2015 and September 28, 2014 was 20.9% and 15.9%, respectively. The effective tax rates for these periods were lower than the expected federal statutory rate of 35% primarily because of the favorable effect of statutory rates applicable to income earned outside the United States. The tax rate for the nine months ended October 4, 2015 was increased by additions to the uncertain tax positions for transfer pricing included in the projected annual effective tax rate, partially offset by $5.0 million of discrete tax benefits composed of $1.8 million of benefit attributable to a United States Tax Court opinion regarding intercompany cost sharing arrangements, $1.3 million of reductions in uncertain tax positions resulting from the expiration of statutes and the settlement of an audit, $0.9 million from disqualifying dispositions of incentive stock options and employee stock purchase plan shares and $1.0 million from other discrete tax benefits.

The tax rate for the nine months ended September 28, 2014 was increased by $2.6 million of discrete tax expense composed of $7.2 million of additions to the uncertain tax positions for transfer pricing net of $1.7 million of discrete tax benefits from disqualifying dispositions of incentive stock options and employee stock purchase plan shares, $0.9 million of discrete tax benefits resulting from increases in credit carry forwards and $2.0 million from other discrete tax benefits.

On a quarterly basis, Teradyne evaluates the realizability of the deferred tax assets by jurisdiction and assesses the need for a valuation allowance. As of October 4, 2015, Teradyne believes that it will ultimately realize the deferred tax assets recorded on the condensed consolidated balance sheet. However, should Teradyne believe that it is more likely than not that the deferred tax assets would not be realized, the tax provision would increase in the period in which Teradyne determined that the realizability was not likely. Teradyne considers the probability of future taxable income and historical profitability, among other factors, in assessing the realizability of the deferred tax assets.

As of October 4, 2015 and December 31, 2014, Teradyne had $33.3 million and $30.4 million, respectively, of reserves for uncertain tax positions. The $2.9 million net increase in reserves for uncertain tax positions relates primarily to transfer pricing exposures.

As of October 4, 2015, Teradyne anticipated the liability for uncertain tax positions could decrease by approximately $0.1 million over the next twelve months, primarily as a result of the expiration of statutes of limitations. The potential decrease is related to transfer pricing exposures.

Teradyne recognizes interest and penalties related to income tax matters in income tax expense. As of October 4, 2015 and December 31, 2014, $0.3 million and $0.6 million, respectively, of interest and penalties were included in the reserve for uncertain tax positions.

Teradyne qualifies for a tax holiday in Singapore by fulfilling the requirements of an agreement with the Singapore Economic Development Board under which certain headcount and spending requirements must be met. The tax savings due to the tax holiday for the nine months ended October 4, 2015 was $9.9 million, or $0.05 per diluted share. The tax savings due to the tax holiday for the nine months ended September 28, 2014 was $12.3 million, or $0.05 per diluted share. The tax holiday is currently expected to expire on December 31, 2015. Teradyne is in discussion with the Singapore Economic Development Board with respect to extension of the tax holiday for periods after December 31, 2015.