Neymar has signed a new five-year contract with Barcelona, which keeps him at the club until 2021.
The Nou Camp club announced earlier this week, that they had reached an agreement with the Brazilian. But he officially put pen to paper on Friday.
Barcelona have fixed his buy-out clause at £181m for the first year, £200m for the second and £226m for the remaining three years of his new deal.
In a statement earlier this week, the La Liga champions said: “Since his arrival at the club, Neymar has cemented his position as one of the best players in the world thanks to his outstanding talent.
“The Brazilian finished third in the 2015 Ballon d’Or award behind the winner his team-mate Leo Messi. After three seasons with FC Barcelona, Neymar’s statistics are outstanding.
“In 141 games for the club he has scored 85 goals, 15 in his first season, 39 in his second and 31 in his third.”
Neymar joined Barcelona from Santos in 2013.