The 35-year-old Busquets will rejoin his buddy and former teammate Lionel Messi after opting not to extend his contract at Barca after 18 years.
The 2010 World Cup champion will join the team soon and take a spot as a Designated Player, the club announced.
Manager Jorge Mas remarked, "I am thrilled to welcome Sergio Busquets to Inter Miami." "Our goal has been to bring the top players in the globe since day one. The work Sergio has produced speaks for itself.
"I'm very happy to be part of Inter Miami." - Sergio Busquets pic.twitter.com/Uqmpfqw0U6
— Inter Miami CF (@InterMiamiCF) July 17, 2023
The former Barcelona captain, who resigned from international duty last year, won nine La Liga titles, seven Copa del Rey titles, three Champions League trophies, and three Club World Cups with the Spanish champions.
According to media reports, Al Hilal and Al Nassr made offers for Busquets' services, raising the possibility of his moving to Saudi Arabia.
Busquets is expected to be eligible for Miami's League Cup opener against Mexican club Cruz Azul next Saturday when Messi is expected to make his debut.
Due to the Designated Player Rule, teams are permitted to sign up to three players whose combined salaries and acquisition costs are more than the salary cap.