Newcastle are reportedly forking out more than £100,000 each week to pay players who no longer represent the Premier League club.
The Magpies became the wealthiest club in the world when a Saudi-backed consortium completed a takeover last October, ending Mike Ashley's unpopular 14-year reign at St James' Park. The new owners have since revamped the playing squad and coaching staff.
Eddie Howe replaced Steve Bruce as manager last November and brought in several players in January and the summer - including Kieran Trippier, Nick Pope, Sven Botman, Bruno Guimaraes, Chris Wood, Alexander Isak, Dan Burn, Matt Targett and Loris Karius.