Rishi Sunak nació el 12 de mayo de 1980 en Southampton, Hampshire, Inglaterra. Está casado con Akshata Murty Sunak desde el 30 de agosto de 2009. Tienen dos niños.
Although he announced his decision to run for prime minister of the United Kingdom on 8 July 2022, the day after Boris Johnson's resignation, he had already registered the internet domain for his leadership bid's website on 23 December 2021.