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RESULTS FOR THE YEAR - A reconciliation of Genmab's effective tax (Details) - DKK (kr)
kr in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
RESULTS FOR THE YEAR      
Net result before tax kr 2,859 kr 1,612 kr 1,064
Computed 22% (2018 & 2017: 22%) 629 355 234
Recognition of previously unrecognized tax losses and deductible temporary differences (19) (267) (286)
Non-deductible expenses/non-taxable income and other permanent differences, net 75 53 14
All other 8 (1) (2)
Total tax effect 64 (215) (274)
Total tax expense (income) 693 140 (40)
Total tax for the period in shareholders' equity kr (24) kr (89) kr (72)
Applicable tax rate 22.00% 22.00% 22.00%