The Telegraph have reported that The Magpies are looking to complete a deal for the Scotland youth international with Kilmarnock understood to be willing to let the player make a move to the Premier League side.
Should he sign, McArthur will become Newcastle’s third summer arrival after youngster Alex Murphy from Galway United and Matt Targett from Aston Villa.
Like Murphy, McArthur would be expected to join up with the club’s under-23s side for the start of pre-season in July.
Sunderland AFC transfer gossip: Aiden McGeady urges Celtic's James McCarthy to join Alex Neil on Wearside
Transfer news: Leeds United set to sign Sunderland 'target' with ex-Wigan Athletic and Everton man set for move
The stunning £975m market values of Championship squads this season and where Sunderland rank alongside Sheffield United, Middlesbrough and co
Sunderland AFC transfer news: Cats miss out on £2.5m 'target' as ex-defender makes Switzerland move
Sunderland target left out of Premier League squad amidst transfer and contract speculation
Who is Charlie McArthur and why do Newcastle United want to sign him?
McArthur, who turned 17 in May, has been lauded as one of the brightest young prospects in Scottish football having captained his country at under-17s level and also breaking into Kilmarnock’s first team. He appeared four times for the Scottish Championship winners last season.
Due to his potential, the 6ft 2in central-defender has attracted interest from several other Premier League clubs including Manchester City, Liverpool, Brighton, West Ham and Wolves with a £275,000 bid previously reported.
While Newcastle are actively looking to strengthen their first team squad this summer, they are also planning for the future and looking to establish a competitive academy set-up.
Newcastle’s under-18s side finished bottom of the league last season while the under-23s failed to make the play-offs in the Premier League 2 Division 2.
What Charlie McArthur has said about his future
Last month, McArthur said: "I'll speak to the manager when I get back [from the Under-17 Euros] and see what the plans are and go from there. I'm still under contract for another year so I am still a Kilmarnock player.
"Derek McInnes has been good to work for. I'll just need to see what happens when I go back and it'll all work out.
"It's not difficult to focus despite the speculation because at this moment in time I'm not playing in England.
"It was brilliant to make my league debut for Kilmarnock at Raith Rovers a few weeks ago. It's been great around the club.
"The players have all been buzzing. We are a good group and everyone can't wait to play in the [Scottish] Premier League next season.”