Ibišević was loaned to Hertha BSC on 30 August 2015, making the deal permanent in July 2016. Ibišević debuted for his new club against VfB Stuttgart on 12 September 2015. On 22 September, he scored twice in a 2–0 home win over 1. FC Köln, ending a 25-game goal drought. On 3 October, Ibišević scored two goals in three minutes in a 3–0 win over Hamburger SV. On 17 October, Ibišević received a straight red card in the 18th minute against Schalke 04 for a challenge on Max Meyer in an eventual 2–1 loss, which got him suspended for four games. Ibišević scored his third brace of the season against Darmstadt 98 on 12 December to take his tally up to six for the season, with all his goals coming in pairs.