All units have extra upkeep, which is taken as a percentage of the player's req income. For example, A Tyranid player with 3 Hormagaunt squads and a Ripper squad would have (340 - 20.4) * (1 - 0.00425*24) req income; 340 is the base HQ income, 20.4 is the traditional upkeep cost from squads above 30 pop (1 of those hormagaunt squads), 0.00425*24 is the upkeep percentage from 3 squads of 8 hormagaunts (3 * 8 = 24), each at 0.425%.
alguien q tradusca esto me casi no comprender