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Operating costs and expenses (Tables)

12 Months Ended

Dec. 31, 2024

Notes and other explanatory information [abstract]

Schedule of operating costs and expenses


	2024	2023	2022
Operating costs
Salaries, payroll charges and benefits	(2,357,526)	(2,717,005)	(2,285,765)
Pension plan obligations	(23,704)	(36,998)	(29,796)
Construction costs (Note 28)	(6,085,895)	(5,474,729)	(4,754,383)
General supplies	(345,771)	(356,481)	(369,381)
Treatment supplies	(577,639)	(558,557)	(598,993)
Outsourced services	(1,915,851)	(1,843,213)	(1,724,347)
Electricity	(1,573,067)	(1,514,542)	(1,497,644)
General expenses	(1,246,474)	(967,148)	(831,503)
Depreciation and amortization	(2,477,146)	(2,583,193)	(2,259,091)
	(16,603,073)	(16,051,866)	(14,350,903)

Selling expenses
Salaries, payroll charges and benefits	(335,382)	(347,536)	(306,864)
Pension plan obligations	(3,825)	(3,359)	(4,021)
General supplies	(4,679)	(6,746)	(7,121)
Outsourced services	(423,964)	(439,995)	(418,632)
Electricity	(658)	(673)	(1,001)
General expenses	(98,800)	(116,933)	(107,313)
Depreciation and amortization	(50,281)	(68,818)	(67,015)
	(917,589)	(984,060)	(911,967)

Bad debt expense, net of recoveries (Note 10 (c))	(557,789)	(652,920)	(782,057)

Administrative expenses
Salaries, payroll charges and benefits	(602,217)	(423,948)	(284,562)
Pension plan obligations	(78,428)	(122,248)	(84,670)
General supplies	(108,901)	(23,008)	(23,664)
Outsourced services	(391,637)	(287,744)	(250,293)
Electricity	(1,297)	(2,020)	(1,896)
General expenses	(898,587)	(509,984)	(548,626)
Depreciation and amortization	(149,215)	(138,575)	(124,743)
Tax expenses	(81,156)	(90,021)	(80,053)
	(2,311,438)	(1,597,548)	(1,398,507)

Operating costs and expenses
Salaries, payroll charges and benefits	(3,295,125)	(3,488,489)	(2,877,191)
Pension plan obligations (Note 24 (v))	(105,957)	(162,605)	(118,487)
Construction costs (Note 28)	(6,085,895)	(5,474,729)	(4,754,383)
General supplies	(459,351)	(386,235)	(400,166)
Treatment supplies	(577,639)	(558,557)	(598,993)
Outsourced services	(2,731,452)	(2,570,952)	(2,393,272)
Electricity	(1,575,022)	(1,517,235)	(1,500,541)
General expenses	(2,243,861)	(1,594,065)	(1,487,442)
Depreciation and amortization	(2,676,642)	(2,790,586)	(2,450,849)
Tax expenses	(81,156)	(90,021)	(80,053)
Bad debt expense, net of recoveries (Note 10 (c))	(557,789)	(652,920)	(782,057)
	(20,389,889)	(19,286,394)	(17,443,434)