Kakashi did not borrow any chakra

[Takos]

Many people said that the reason for Kakashi using all these kamui and not collapsing yet is because he is given chakra by Bee or Naruto.
I thought it's pretty unlikely as long as it's not confirmed in the manga and it seems that I was right. Kakashi did not borrow any chakra, he used his own all that time.

Spoiler

In the latest chapter Kakashi states he has a small amount of chakra left, which seems to prove he wasn't given any.

I dunno why people prefer to come with new theories on Kakashi's chakra while not accepting what has been confirmed in the manga - Kakashi improves all the time, including his kamui proficiency.

 

[6PathsofKami]

I knew aswell, if he did borrow chakra it would have been clearly shown by kishi, people were just saying it because kakashi used kamui more than the usual without collapsing but we know everytime hes used it in a new fight he could use more kamuis.

 

[Takos]

Additionally, I think the latest chapter made it clear that it's not like Kakashi cannot go blind from using his MS. We could see his eye bleeding.

My guess is that he just didn't want to go blind so he used kamui really as a last resort technique - unlike Itachi and even more Sasuke (who spammed it so much he went blind in like a month :sy who depend on their MS all the time.