Hall, 22, will become one of Newcastle's highest earners after committing his future to the club until the summer of 2031, extending an existing deal that had been due to expire in 2029. He follows team-mates Lewis Miley, Sven Botman and Harvey Barnes in signing new terms at St James' Park this year, part of a wider effort by the club to tie down its most valued players.
United had identified Hall as their long-term successor to Luke Shaw at left-back and made contact with Newcastle over a potential deal during the summer, only to be told in no uncertain terms that he was not for sale regardless of the fee on offer.
The Old Trafford club were prepared to offer as much as £60 million, but Newcastle's stance never wavered, leaving Michael Carrick's side to explore alternatives including Barcelona's Alejandro Balde before the window closed without a left-back arriving.
Hall joined Newcastle United from Chelsea, initially on loan before a £35 million permanent deal was triggered in 2024, and has gone on to make 102 appearances for the club across all competitions, contributing ten goal involvements along the way.
He scored his first Newcastle goal in a League Cup win over Manchester United at Old Trafford during his loan spell, and later netted his first Premier League goal in a defeat to the same opponents, giving this saga an added personal edge for United supporters who watched him develop into exactly the kind of player their club wanted to sign.
He has established himself as Newcastle's first-choice left-back and earned senior England recognition in the process, developments that persuaded the club's hierarchy to move quickly on fresh terms once Manchester United's interest became public over the summer.
New head coach Matthias Jaissle has also offered Hall a role within the squad's leadership group, underlining the extent to which he is now viewed as a central figure in Newcastle's plans rather than merely a squad player to be sold for the right price. United are expected to revisit their interest in a left-back next summer, but a longer contract only strengthens Newcastle's negotiating position should that interest resurface.