Manager Phillip Cocu also deferred part of their salary, his coaching staff, executives and non-playing staff.
"The first team players have voluntarily agreed on a substantial deferral that is significantly more than reported in the media, while Phillip Cocu and his coaching team, as well as Chief Executive Stephen Pearce and his staff, have also agreed on substantial deferences," Derby said in a statement.
"Club-wide talks were held in a spirit of unity and cooperation and everyone was fully committed to assisting and playing their part.
"The club would like to specifically thank the team captain Wayne Rooney and Curtis Davies, the club representative of the Professional Footballers Association, for their help and support."
Derby seems set for another second tier season as they lay 12th in the table when last month's COVID-19 outbreak brought football to a halt.
Failure to complete the season is predicted to cost Premier League clubs an estimated £1bn ($1.2bn).
However, further down the football pyramid, the effects of the economic crisis could be even more severe, as many clubs face a battle to survive.