Kylie Jenner to Become The World's Youngest Self-Made Billionaire Jenner is now the 27th-richest self-made woman in the US, beating out the rest of her famous family. According to 'Forbes,' Kyle's Jenner's net worth is around $900 billion. She even graced the cover of the 'Forbes' August 2018 issue and was featured as one of 'America's Women Billionaires.' The 20-year-old's fortune has skyrocketed thanks to the success of Kylie Cosmetics. Forbes values the company at $800 million, with an estimated $330 million in sales last year. Jenner is both the face of the company and the sole owner.