Teradyne generally provides a one-year warranty on its products, commencing upon installation, acceptance or shipment. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience. Related costs are charged to the warranty accrual as incurred. The balance below is included in other accrued liabilities.


	For the Three Months Ended
	March 30, 2025			March 31, 2024
	(in thousands)
Balance at beginning of period	$	12,962		$	15,698
Accruals for warranties issued during the period		5,946			3,259
Accruals related to pre-existing warranties		(552	)		(683	)
Settlements made during the period		(5,280	)		(2,950	)
Balance at end of period	$	13,076		$	15,324

When Teradyne receives revenue for extended warranties, beyond one year, it is deferred and recognized on a straight-line basis over the contract period. Related costs are expensed as incurred. The balance below is included in short and long-term deferred revenue and customer advances.


	For the Three Months Ended
	March 30, 2025			March 31, 2024
	(in thousands)
Balance at beginning of period	$	41,624		$	34,897
Deferral of new extended warranty revenue		7,938			6,914
Recognition of extended warranty deferred revenue		(5,250	)		(7,302	)
Balance at end of period	$	44,312		$	34,509