The latest figures emerged in a detailed filing to the New York Stock Exchange on Thursday, a day after United published its accounts for the financial year ending June 30.
The additional borrowing means the Premier League giants' overall debt remains above £1 billion, despite a series of cost-cutting measures introduced by Sir Jim Ratcliffe following his acquisition of a minority stake in the club in 2024.
United completed three major signings during the summer transfer window, bringing in Andrey Santos from Chelsea on July 13, Youri Tielemans from Aston Villa the following day and Carlos Baleba from Brighton on August 25.
The transfer fees disclosed by the club when the deals were announced totalled £153 million. However, United subsequently confirmed total summer expenditure of £191.7 million on new players, leaving questions over the additional £38.7 million.
The club has been approached for clarification on the difference between the figures.
Fresh Borrowing
United's latest financial filing showed that the club made three further drawdowns from its revolving credit facility after the end of June.
The withdrawals, made on July 29, July 31 and August 28, amounted to £120 million. United subsequently repaid £30 million on September 21, leaving a net additional borrowing of £90 million.
The development has pushed the club's overall debt to approximately £1.15 billion.
That figure comprises £578 million in historic debt, £200 million outstanding on the club's revolving credit facility and a further £375 million in transfer fees still owed to other clubs.
Although the transfer-fee debt represents a £72 million reduction from the £447 million recorded in United's 2024-25 accounts, the outstanding amount remains substantial.
Of the £375 million owed in transfer fees, £104.8 million is due to be paid between one and two years, while another £51.9 million is scheduled for payment between two and five years.
The remainder is due within the next 12 months.
United said payments relating to their most recent acquisitions “are due within the next five years.”
Cost-Cutting Under Ratcliffe
The latest figures come despite efforts by Ratcliffe and his INEOS-led management team to reduce operating costs since taking a minority stake in the club.
The measures have included significant attempts to lower the wage bill and reduce the club's overall expenditure, but the latest financial disclosures underline the scale of United's existing financial commitments.
The club's continued reliance on its revolving credit facility, coupled with outstanding transfer obligations, means that its financial position remains closely tied to its ability to manage both existing debt and future spending.
With £1.15 billion now listed as total debt, the latest borrowing adds another layer to the financial challenges facing one of the world's most commercially prominent football clubs.