Board Thread:Versus Debates/@comment-30168027-20161030085406/@comment-734582-20161211113052

Kakashisologod wrote: Yeah cost a lot of chakra for kaguya,and now it didnt took 10% of his chakra right? Keep in mind that Kaguya didn't open portals between dimensions but rather summoned entire dimensions, as it was called. She also regularly spammed high-power techniques between them and did it a ton of times. Obito opened 3 portals with his own and Sakura's chakra, and since it's not his own space-time it would cost extra.

So yes, interdimensional portals cost a lot of chakra. I think many a Kage would die from exhaustion and still fail. But it's not so much that it requires biju-levels of chakra, whereas we've seen Sasuke use techniques that seem to be Biju-level.

Drawing a conclusion, it cost Sasuke quite a bit of chakra but i'd dare say less than half his reserves. Compare that to Naruto, and i think Naruto lost (both percentage-wise and in absolute numbers) more chakra.