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INCOME TAXES (Tables)

12 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax Expense

Income before income tax expense consisted of the following (in thousands):

			Fiscal Year Ended March 31,
			2025						2024						2023
Domestic			$	(386,859)					$	(169,657)					$	56,463
Foreign			21,065						25,147						11,952
			$	(365,794)					$	(144,510)					$	68,415

Schedule of Components of Income Tax Expense

The components of the income tax expense are as follows (in thousands):

			Fiscal Year Ended March 31,
			2025						2024						2023
Current income tax expense:
Federal			$	21,766					$	32,798					$	48,853
State			4,548						6,161						5,766
Foreign			12,353						10,238						7,879
			38,667						49,197						62,498
Deferred income tax benefit:
Federal			(30,403)						(36,402)						(47,297)
State			(5,267)						(7,611)						(4,006)
Foreign			(1,869)						(1,960)						(2,428)
			(37,539)						(45,973)						(53,731)
			$	1,128					$	3,224					$	8,767

Schedule of Federal Statutory Income Tax Rate to Effective Tax Rate

The income tax expense computed using the U.S. statutory federal income tax rate differs from NetScout's effective tax rate primarily due to the following:

			Fiscal Year Ended March 31,
			2025						2024						2023
U.S. statutory federal income tax rate			21.0		%				21.0		%				21.0		%
State taxes, net of federal tax effect			(0.5)						(0.6)						3.6
U.S. federal and state research and development tax credits			2.0						6.4						(9.0)
Effect of foreign operations			(0.7)						1.5						1.8
Meals and entertainment			(0.2)						(0.9)						0.4
Change in valuation allowance			(0.6)						(4.1)						3.5
Goodwill impairment			(22.0)						(28.5)						—
Stock compensation			(1.3)						(1.0)						(0.6)
Divestiture			—						(0.6)						—
Global intangible low taxed income			—						(0.2)						—
Foreign derived intangible income			3.2						6.3						(11.7)
Foreign withholding			(1.3)						(1.4)						4.1
Other permanent differences			0.1						(0.1)						(0.3)
			(0.3)		%				(2.2)		%				12.8		%

Schedule of Components of Net Deferred Tax Assets

The components of net deferred tax assets and liabilities are as follows (in thousands):

			Fiscal Year Ended March 31,
			2025						2024
Deferred tax assets:
Accrued expenses			$	5,056					$	4,986
Capitalized R&D expenses			92,427						71,205
Deferred revenue			20,356						21,482
Reserves			2,378						2,650
Pension and other retiree benefits			2,265						2,733
Net operating loss carryforwards			6,532						8,199
Tax credit carryforwards			32,042						29,109
Share-based compensation			7,140						8,233
Operating lease liability			10,503						12,292
Total gross deferred tax assets			178,699						160,889
Valuation allowance			(23,088)						(21,183)
Net deferred tax assets			155,611						139,706
Deferred tax liabilities:
Intangible assets			(65,979)						(86,170)
Operating lease right-of-use asset			(9,067)						(10,481)
Depreciation			(2,494)						(3,472)
Other deferred tax liabilities			(14,420)						(13,190)
Total deferred tax liabilities			$	63,651					$	26,393

Schedule of Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits, excluding interest and penalties, for the fiscal years ended March 31, 2025, 2024 and 2023 is as follows (in thousands):

			Fiscal Year Ended March 31,
			2025						2024						2023
Balance at April 1,			$	1,052					$	1,024					$	638
Additions based on tax positions related to the current year			28						28						28
Reductions of prior years tax positions due to lapse of statute of limitations			(356)						—						—
Increase in unrecognized tax benefits as a result of a tax position taken during a prior period			—						—						358
Balance at March 31,			$	724					$	1,052					$	1,024

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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