The sisters said their clothing stores and their kids' clothing line have always been business savvy, reported the New York Post.
"I think our brand is all about empowering other women to be successful," Kim said.
The reality TV stars said they reevaluated their brand in 2013 and decided to only pursue projects which they are extremely passionate about.
And even though their businesses are now booming, things were not always so great for the sisters.
According to them, they originally were not taken seriously as entrepreneurs.