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Current and deferred income tax (Tables)
 12 Months Ended
Dec. 31, 2024
Current And Deferred Income Tax  
Schedule of reconciliation of income tax (expense) benefit
     
  2024 2023 2022
(Loss) income before income tax (71,851) (296,084) 227,971
Luxembourg statutory income tax rate 24.94% 24.94% 24.94%
       
Expected income tax benefit (expense) at statutory rate 17,920 73,843 (56,856)
ICMS tax incentives permanent difference - 10,995 19,277
Tax effects of translation of non-monetary assets/liabilities to functional currency (1,323) 13,686 6,279
 Withholding tax on dividends paid by subsidiaries - - (5,263)
Impairment loss of goodwill - (12,585) (18,247)
Special mining levy and special mining tax (7,868) (5,366) (13,321)
Difference in tax rate of subsidiaries outside Luxembourg 12,591 24,665 (10,373)
Tax voluntary disclosure – VAT matters (i) (2,403) (29,548) -
Unrecognized deferred tax on net operating losses (ii) (25,515) (52,091) (66,069)
Adjustment to uncertain income tax (iii) (94,764) (5,194) (3,866)
Other permanent tax differences (14,194) (14,131) (2,544)
Income tax (expense) benefit (115,556) 4,274 (150,983)
       
 Current   (205,674) (80,935) (150,735)
 Deferred   90,118 85,209 (248)
Income tax (expense) benefit (115,556) 4,274 (150,983)
Schedule of analysis of deferred income tax assets and liabilities
       
    2024   2023
  Tax credits on net operating losses   242,278   228,283
         
  Tax credits on temporary differences        
Environmental liabilities   10,847   18,407
Asset retirement obligations   22,498   25,492
Inventory provisions   10,903   10,850
Tax, labor and civil provisions   7,886   9,588
Provision for employee benefits   5,196   7,319
Revaluation of derivative financial instruments   36   111
Others   10,773   16,938
         
 Tax debits on temporary differences        
Depreciation, amortization and asset impairment   (70,985)   (29,612)
Added value of assets   (131,663)   (148,798)
Foreign exchange gains   14,222   (26,766)
Capitalized interest   (17,054)   (23,060)
Others   (585)   (20,085)
    104,352   68,667
         
Deferred income tax assets   236,887   235,073
Deferred income tax liabilities   (132,535)   (166,406)
    104,352   68,667
Schedule of effects of deferred tax on income statement and other comprehensive income
     
  2024 2023 2022
 Balance at the beginning of the year 68,667 (24,886) (37,277)
 Effect on loss for the year 90,118 85,209 (248)
 Effect on other comprehensive income – Fair value adjustment 981 (1,269) 998
 Effect on other comprehensive income – hedge accounting   535 198 (178)
Effect on other comprehensive income – Translation effect included in cumulative translation adjustment     (50,565) 9,415 8,481
 Derecognition of Nexa's share of Enercan's deferred income taxes - - 3,338
 Divestments – note 1 (a) (3,348) - -
 Others (2,036) - -
 Balance at the end of the year 104,352 68,667 (24,886)