[5] Prior to his List A debut, he was in the England squad for the 2018 Under-19 Cricket World Cup,[6] where he played all six games, including the last as captain.
[11] In June 2021, Jacks scored English cricket's third fastest Twenty20 fifty off 15 balls as Surrey beat local rivals Middlesex.
In December 2022, Jacks was bought by Royal Challengers Bangalore for ₹3.2 crore ahead of the 2023 season of the Indian Premier League (IPL).
[18] In a league stage match against Gujarat Titans on 28 April, Jacks scored an unbeaten century in 41 balls, in a successful run-chase.
[19] In 2024, he and his teammate from Royal Challengers Bangalore, Reece Topley, are heading back to England for "international duties" [20] In May 2020, Jacks was named in a 55-man group of players to begin training ahead of international fixtures starting in England following the COVID-19 pandemic.
[28] In February 2023, Jacks was named in both England's ODI and T20I squad as an injury replacement for Tom Abell for the away series against Bangladesh.