Osimhen's transfer shattered the previous record set by Fenerbahce when they signed Youssef En-Nesyri from Sevilla on a five-year contract for 20 million euros in July last year.

As part of the agreement, 10 percent of any future profit from Osimhen's next transfer will be paid to SSC Napoli, Galatasaray said.

"A four-year contract has been signed with the player, starting from the 2025-2026 season" Galatasaray said.

According to the agreement, the 26 year-old will receive net guaranteed salary of 15.0 million euros for each season.

Osimhen will also get a net loyalty bonus of 1.0 million euros per season and 5.0 million euros as image rights payments — compensating for the use of his name, image, and likeness in the club's branding and promotional activities.

Napoli also confirmed the terms of the deal.

Osimhen had been linked with a move away from Napoli last year but the Nigeria international had seen a permanent move collapse on deadline day of the close season transfer window.

He subsequently joined Galatasaray on loan for the 2024-2025 season, where he delivered in an outstanding campaign with 37 goals and eight assists in 41 appearances across all competitions, leading it to a 25th Turkish league title.