Mark Cuban says he split rent with 5 roommates at 24. He shared the math and the floor plan.

The billionaire former "Shark Tank" investor has been open about the broke student mindset that ruled his 20s and helped him launch his first business, MicroSolutions. In an X post on Sunday, he went into the nitty-gritty of just how frugal he had been.

Cuban said that at age 24, he lived in an apartment in Dallas that, today, costs $2,388. He said he shared it with five roommates, and his share of the rent came to what would have been $400 in 2026.

He shared the floor plan of his old apartment in a complex called "The Village." The floor plan showed a three-bedroom layout with two bathrooms, a…