The Football League's latest figures show that Chesterfield spent no money on agents' fees for the second successive year.
The Spireites were one of 14 clubs not to commit to agents in the 2009/10 season.
However, the publication of Football League clubs' spending on agents' fees has revealed that money committed has increased in the last 12 months from £8.8million to £12.7million.
Football League chairman Greg Clarke voiced his concern, saying: "Given the current economic climate, it is worrying to see such a significant amount leaking from the game.
"This year`s figures demonstrate a considerable increase on those of last season and it is essential that clubs work to reduce this liability over the coming campaign."