The France global, who scored the opening goal in his country's 3-1 victory over Italy on Friday, joined Barcelona from Lyon in 2016. The extension will see the Frenchman remain at Camp Nou till June 30, 2023, putting an end to Manchester United's hopes of signing him.
Umtiti will officially sign the contract on Monday morning at the Nou Camp before holding a press conference shortly after.More news: Rohr confirms Simmy Nwankwo for World Cup
Umtiti joined Barcelona in 2016 after a productive spell with Lyon, and he established himself as one of the world's best defenders in the first half of this season.
While no mention was made of a release clause in his new deal yet, the club are expected to announce an increase on the original £53m in his current contract on Monday, with Mundo Deportivo reporting it will be €500m.More news: Kim Jong Un sends Trump 'very nice' letter - and it's huge
Umtiti is part of Didier Deschamps' 23-man France squad for this summer's World Cup.
"Barcelona and the player Samuel Umtiti have reached an agreement for the renewal of a contract that will bind both parties for the next five seasons", Barca signalled in a statement released on Sunday.More news: WWDC 2018 will be all about software: No new hardware announcements
"I'm at a club that allowed me to realise my dream of playing there". As far as Manchester United are concerned, they will now have to turn their attention elsewhere, with the player committed to Barcelona.