Mourinho has been a big spender in previous seasons, but does not expects a significant change this year.
He told Chelsea magazine: “The spenders will be Liverpool, Manchester United, Tottenham and maybe Arsenal. It won’t be Chelsea for sure.
“Maybe at the beginning of next season they will say that Chelsea are not the favourites anymore because the club did not spend so much money.”
Mourinho added: “People ask Chelsea, ‘Last season you won two trophies, why did you not win four?’ But not many journalists ask Liverpool boss Rafael Benitez and Arsenal manager Arsene Wenger, ‘Why zero?’ And not many people ask Manchester United, ‘Why only the Premiership?’
“Is it about money? If it is, I hope that next season the media put pressure on the big spenders because the big spenders, for sure, will not be Chelsea.”
