Rob Kardashian. AP Rob Kardashian's net worth is unclear, although some unverified estimates have put it around $10 million. In 2018, amid his child custody battle with ex-girlfriend Blac Chyna, he reported his monthly income had dropped from $100,000 to $10,000, according to court documents obtained by The Blast. The only Kardashian brother does have a few product lines, including apparel company Halfway Dead and sock brand Arthur George, which is now part-owned by his mother. He launched Grandeza, a vegan hot sauce brand, with his mom last year, and in January, he also announced he was coming out with a new vanilla cream soda drink with Exotic Pop.