He said the tournament, which currently involves seven teams, would be held every four years and would boost revenues for the global sports body further.
Currently, the top teams of every continental competition as well as the hosts' national champion battle it out for the Club World Cup title.
He said FIFA expected revenues of $11 billion for the four-year period between 2022 and 2026 but that did not include the new club World Cup format in 2025.
"This 11 billion figure is without the club World Cup (in 2025). At the end of the four years we will make even more revenue," Infantino told a news conference.
The 2026 World Cup will be hosted by the United States, Canada and Mexico.
Infantino also said that the 2022 Club World Cup, traditionally held in December but delayed this year due to the ongoing World Cup in Qatar, will be hosted by Morocco between Feb. 1-11 2023.
The decision was taken by the FIFA Council following its meeting on Friday.