The components of net periodic pension costs (NPPC) and net periodic benefit costs (NPBC) for HEI consolidated and Hawaiian Electric consolidated were as follows:


	Three months ended September 30								Nine months ended September 30
	Pension benefits				Other benefits				Pension benefits				Other benefits
(in thousands)	2024		2023		2024		2023		2024		2023		2024		2023
HEI consolidated
Service cost	$	12,061	$	11,418	$	270	$	385	$	34,590	$	34,210	$	833	$	1,072
Interest cost	26,542		26,022		1,808		2,075		79,554		77,265		5,542		6,389
Expected return on plan assets	(35,993)		(35,238)		(3,490)		(3,426)		(107,957)		(105,630)		(10,462)		(10,236)
Amortization of net prior period gain	—		—		—		(218)		—		—		—		(656)
Amortization of net actuarial (gain)/losses	188		138		(763)		(518)		410		515		(2,188)		(1,416)
Net periodic pension/benefit cost (return)	2,798		2,340		(2,175)		(1,702)		6,597		6,360		(6,275)		(4,847)
Impact of PUC D&Os	17,406		17,663		2,052		1,536		53,585		53,929		5,827		4,385
Net periodic pension/benefit cost (return) (adjusted for impact of PUC D&Os)	$	20,204	$	20,003	$	(123)	$	(166)	$	60,182	$	60,289	$	(448)	$	(462)
Hawaiian Electric consolidated
Service cost	$	11,670	$	11,071	$	266	$	380	$	33,502	$	33,108	$	822	$	1,060
Interest cost	24,615		24,116		1,721		1,981		73,869		71,513		5,279		6,107
Expected return on plan assets	(33,769)		(33,029)		(3,438)		(3,374)		(101,321)		(98,972)		(10,306)		(10,081)
Amortization of net prior period gain	—		—		—		(218)		—		—		—		(654)
Amortization of net actuarial (gain)/losses	51		(16)		(742)		(503)		74		21		(2,130)		(1,370)
Net periodic pension/benefit cost (return)	2,567		2,142		(2,193)		(1,734)		6,124		5,670		(6,335)		(4,938)
Impact of PUC D&Os	17,406		17,663		2,052		1,536		53,585		53,929		5,827		4,385
Net periodic pension/benefit cost (return) (adjusted for impact of PUC D&Os)	$	19,973	$	19,805	$	(141)	$	(198)	$	59,709	$	59,599	$	(508)	$	(553)