Exhibit 99.1
Return on Invested Capital ("ROIC") and Economic Return Calculations GAAP to non-GAAP reconciliation (dollars in thousands):
			Fiscal year ended
			October 1,			October 2,			October 3,
			2022			2021			2020
Operating income, as reported			$	178,185		$	176,268		$	153,372
Restructuring and impairment charges			2,021			3,267			6,003
Adjusted operating income			180,206			179,535			159,375
Tax rate			13.0		%	13.0		%	14.0		%
Adjusted operating income (tax effected)			$	156,779		$	156,195		$	137,062
Average invested capital			$	1,207,357		$	1,014,742		$	979,981
ROIC			13.0		%	15.4		%	14.0		%
WACC			9.3		%	8.1		%	8.8		%
Economic Return			3.7		%	7.3		%	5.2		%
Average Invested Capital	Fiscal 2022
	October 1,		July 2,			April 2,			January 1,			October 2,		Average invested capital
	2022		2022			2022			2022			2021
Equity	$	1,095,731	$	1,058,190		$	1,040,591		$	1,044,095		$	1,028,232
Plus:
Debt and finance lease obligations - current	273,971		250,012			222,393			151,417			$	66,313
Operating lease obligations - current (1)	7,948		8,640			9,266			9,507			$	9,877
Debt and finance lease obligations - long-term	187,776		184,707			186,069			187,075			$	187,033
Operating lease obligations - long-term	33,628		32,270			34,347			36,343			$	37,970
Less:
Cash and cash equivalents	(274,805)		(276,608)			(307,964)			(217,067)			$	(270,172)
	$	1,324,249	$	1,257,211		$	1,184,702		$	1,211,370		$	1,059,253	$	1,207,357
Average Invested Capital	Fiscal 2021
	October 2,		July 3,			April 3,			January 2,			October 3,		Average invested capital
	2021		2021			2021			2021			2020
Equity	$	1,028,232	$	1,020,450		$	1,013,952		$	1,006,959		$	977,480
Plus:
Debt and finance lease obligations - current	66,313		60,468			50,229			148,408			146,829
Operating lease obligations - current (1)	9,877		9,130			9,314			9,351			7,724
Debt and finance lease obligations - long-term	187,033		187,690			188,730			188,148			187,975
Operating lease obligations - long-term	37,970		33,193			34,751			37,052			36,779
Less:
Cash and cash equivalents	(270,172)		(303,255)			(294,370)			(356,724)			(385,807)
	$	1,059,253	$	1,007,676		$	1,002,606		$	1,033,194		$	970,980	$	1,014,742

Average Invested Capital	Fiscal 2020
	October 3,		July 4,		April 4,		January 4,		September 28,		Average invested capital
	2020		2020		2020		2020		2019
Equity	$	977,480	$	944,821	$	892,558	$	908,372	$	865,576
Plus:
Debt and finance lease obligations - current	146,829		145,993		107,880		67,847		100,702
Operating lease obligations - current (1) (2)	7,724		8,061		8,546		9,102		—
Debt and finance lease obligations - long-term	187,975		188,626		186,327		186,827		187,278
Operating lease obligations - long-term (2)	36,779		38,077		39,617		41,764		—
Less:
Cash and cash equivalents	(385,807)		(296,545)		(225,830)		(252,914)		(223,761)
	$	970,980	$	1,029,033	$	1,009,098	$	960,998	$	929,795	$	979,981

(1)	Included in other accrued liabilities on the Consolidated Balance Sheets.
(2)	In fiscal 2021, Plexus adopted and applied Topic 842 to all leases using the modified retrospective method of adoption. The prior year comparative information has not been restated and continues to be reported under the accounting standards in effect for fiscal 2019.