Manchester United have been forced to write off £6.7m for Bastian Schweinsteiger following José Mourinho’s exclusion of the World Cup winner from his squad. According to the club’s latest accounts the sum is the value of Schweinsteiger, who was told by the manager he would train with junior players, as a player asset.

A statement in the document read: “Exceptional costs for the year were £15.1m, of which £8.4m related to compensation to the former manager and certain members of the coaching staff for loss of office and £6.7m related to a registrations’ impairment charge regarding a reduction in the carrying value of a player no longer considered to be a member of the first team playing squad. Exceptional costs for the prior year were £2.3m.”

The £8.4m figure relates to the sacking of Louis van Gaal and his staff before Mourinho replaced the Dutchman.

Schweinsteiger stressed towards the end of the transfer window that United would be his last club in Europe. The former Germany captain was omitted from United’s Europa League squad but was included in the Premier League group, although that was compulsory under league guidelines.

United, meanwhile, have become the first British club to earn more than half a billion pounds in a single year, having announced a total revenue of £515.3m in their accounts up to 30 June.

Life at Old Trafford was often uncomfortable during the 2015-16 campaign, with FA Cup glory not enough to ensure Van Gaal kept his job as manager.

A fifth-place finish in the Premier League meant United missed out on Champions League qualification, but matters away from the pitch were far more successful. It was just short, however, of Barcelona’s revenue of £570m that was announced in July. United’s revenue is predicted to be £530m to £540m at the end of the next financial year, having achieved a record operating profit of £68.9m in 2015-16.

The executive vice-chairman, Ed Woodward, said: “Our record fiscal 2016 financial performance reflects the continued underlying strength of the business and the club is on target to achieve record revenues in 2017, even without a contribution from the Champions League.

“This strong financial performance has enabled us to invest in our squad, team management and facilities to position us to challenge for, and win, trophies in the coming years.”

Commercial revenue rose 36.3% to £268.3m in a year that the agreement with Adidas came into play, helping retail revenues rise 207.9%. Broadcasting revenue was up 30.4% to £140.4m and match-day revenues rose 17.7% to £106.6m.