The publication of fees paid to agents by Football League Clubs for the 2013/14 season shows a total of £17.7m - down 18% on the previous season of £21.5m.
During this period, Barnsley Football Club committed a total of £162,114.
The Football League's Chief Executive, Shaun Harvey, said: "The 2013/14 campaign was the first season against which sanctions will be applied in all three of our divisions under The Football League's Financial Fair Play rules. It is therefore notable that we have seen a significant fall in payments to agents. Hopefully this is a sign that they are having a positive effect but it's too early to know for definite at this stage.
"Whilst a reduction of £4m is welcome there is still a very significant sum leaving the game to pay agents. Under the financial reporting arrangements in place for clubs these liabilities are provided for in club business plans going forward."