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Income Taxes
 6 Months Ended
Jul. 04, 2021
Income Taxes
S. INCOME TAXES
A reconciliation of the United States federal statutory corporate tax rate to Teradyne’s effective tax rate was as follows:
 
    
For the Three Months

Ended
    
For the Six Months

Ended
  
    
July 4,

2021
    
June 28,

2020
    
July 4,

2021
    
June 28,

2020
  
U.S. statutory federal tax rate
      21.0 %      21.0 %      21.0 %      21.0 % 
Foreign taxes
      (4.3 )      (4.6 )      (4.5 )      (5.1 ) 
International provisions of the U.S. Tax Cuts and Jobs Act of 2017
      (1.7 )      (1.9 )      (1.6 )      (1.1 ) 
Tax credits
      (1.2 )      (1.4 )      (1.2 )      (1.6 ) 
Discrete benefit related to equity compensation
      (0.2 )      (0.1 )      (2.4 )      (2.0 ) 
Other, net
      0.9       0.1       0.9       0.7  
    
 
 
    
 
 
    
 
 
    
 
 
  
Effective tax rate
      14.5 %      13.1 %      12.2 %      11.9 % 
    
 
 
    
 
 
    
 
 
    
 
 
  
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 July 4, 2021, 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 July 4, 2021 and December 31, 2020, Teradyne had $16.6 million and $17.9 million, respectively, of reserves for uncertain tax positions. The $1.3 million net decrease in reserves for uncertain tax positions is primarily related to U.S. state research and development credits generated in prior years, as well as U.S. federal research and development credits generated in the current year.
As of July 4, 2021, Teradyne estimates that it is reasonably possible that the balance of unrecognized tax benefits may decrease approximately $1.6 million in the next twelve months because of a lapse of statutes of limitation. The estimated decrease relates to loss carryforwards, research credits and U.S. manufacturing activities deductions.
Teradyne recognizes interest and penalties related to income tax matters in income tax expense. As of July 4, 2021 and December 31, 2020, $1.4 million and $1.2 million, respectively, of interest and penalties were accrued for uncertain tax positions. For the six months ended July 4, 2021 and June 28, 2020, expense of $0.2 million and $0.3 million, respectively, was recorded for interest and penalties related to income tax items.
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 six months ended July 4, 2021 was $15.9 million, or $0.08 per diluted share. The tax savings due to the tax holiday for the six months ended June 28, 2020 was $13.6 million, or $0.08 per diluted share. In November 2020, Teradyne entered into an agreement with the Singapore Economic Development Board which extended its Singapore tax holiday under substantially similar terms to the agreement which expired on December 31, 2020. The new tax holiday is scheduled to expire on December 31, 2025.