Expenses Classified by Nature (Tables)

12 Months Ended

Dec. 31, 2024

Expenses classified by nature for the years ended December 31, 2022, 2023 and 2024 are as follows:


		2022
		Selling and administrative expenses		Cost of sales		Total

		In millions of won
Raw materials used	￦		—		34,832,581		34,832,581
Power purchase			—		41,984,858		41,984,858
Salaries			1,142,360		4,329,099		5,471,459
Retirement benefit expense			109,758		505,612		615,370
Welfare and benefit expense			155,781		540,058		695,839
Insurance expense			20,835		106,672		127,507
Depreciation			244,676		12,056,455		12,301,131
Amortization of intangible assets			85,661		70,499		156,160
Bad debt expense			23,634		—		23,634
Commission			420,390		351,557		771,947
Advertising expense			33,739		10,552		44,291
Training expense			7,327		14,813		22,140
Vehicle maintenance expense			10,749		10,275		21,024
Publishing expense			3,732		3,014		6,746
Business promotion expense			3,198		3,340		6,538
Rent expense			47,680		186,439		234,119
Telecommunication expense			7,945		9,677		17,622
Transportation expense			1,012		113,845		114,857
Taxes and dues			122,177		554,320		676,497
Expendable supplies expense			9,617		47,159		56,776
Water, light and heating expense			17,950		60,002		77,952
Repairs and maintenance expense			152,449		2,586,975		2,739,424
Ordinary development expense			213,932		513,878		727,810
Travel expense			16,062		78,999		95,061
Clothing expense			13,044		8,778		21,822
Survey and analysis expense			1,126		4,322		5,448
Membership fee			1,469		16,912		18,381
Others			143,119		1,902,903		2,046,022

	￦		3,009,422		100,903,594		103,913,016


		2023
		Selling and administrative expenses		Cost of sales		Total

		In millions of won
Raw materials used	￦		—		27,135,770		27,135,770
Power purchase			—		38,304,309		38,304,309
Salaries			1,098,460		4,416,706		5,515,166
Retirement benefit expense			89,533		370,769		460,302
Welfare and benefit expense			152,836		542,367		695,203
Insurance expense			27,726		119,964		147,690
Depreciation			241,533		12,623,380		12,864,913
Amortization of intangible assets			88,648		74,526		163,174
Bad debt expense			62,808		—		62,808
Commission			460,644		341,124		801,768
Advertising expense			30,305		8,856		39,161
Training expense			7,900		16,064		23,964
Vehicle maintenance expense			9,044		9,128		18,172
Publishing expense			3,281		2,879		6,160
Business promotion expense			2,559		2,523		5,082
Rent expense			44,807		161,749		206,556
Telecommunication expense			7,813		9,706		17,519
Transportation expense			1,099		102,502		103,601
Taxes and dues			112,449		574,617		687,066
Expendable supplies expense			7,252		47,252		54,504
Water, light and heating expense			16,207		41,200		57,407
Repairs and maintenance expense			154,062		2,620,200		2,774,262
Ordinary development expense			217,319		500,242		717,561
Travel expense			16,265		77,232		93,497
Clothing expense			10,450		9,490		19,940
Survey and analysis expense			1,068		4,156		5,224
Membership fee			1,503		15,164		16,667
Others			196,011		1,567,652		1,763,663

	￦		3,061,582		89,699,527		92,761,109


		2024
		Selling and administrative expenses		Cost of sales		Total

		In millions of won
Raw materials used	￦		—		21,070,280		21,070,280
Power purchase			—		34,659,893		34,659,893
Salaries			1,180,379		4,887,006		6,067,385
Retirement benefit expense			104,036		428,163		532,199
Welfare and benefit expense			151,840		546,124		697,964
Insurance expense			30,460		130,904		161,364
Depreciation			231,114		13,598,350		13,829,464
Amortization of intangible assets			88,920		74,647		163,567
Bad debt expense			35,232		—		35,232
Commission			429,977		426,976		856,953
Advertising expense			32,205		11,359		43,564
Training expense			8,911		17,156		26,067
Vehicle maintenance expense			9,218		9,416		18,634
Publishing expense			2,857		2,750		5,607
Business promotion expense			2,687		2,627		5,314
Rent expense			48,474		182,358		230,832
Telecommunication expense			9,406		9,920		19,326
Transportation expense			1,108		52,532		53,640
Taxes and dues			98,714		624,475		723,189
Expendable supplies expense			6,976		50,451		57,427
Water, light and heating expense			15,009		42,180		57,189
Repairs and maintenance expense			197,942		2,750,014		2,947,956
Ordinary development expense			217,975		555,956		773,931
Travel expense			18,726		74,843		93,569
Clothing expense			11,216		9,299		20,515
Survey and analysis expense			871		4,382		5,253
Membership fee			1,709		15,995		17,704
Others			134,064		1,726,104		1,860,168

	￦		3,070,026		81,964,160		85,034,186