MK Dons would have been unable to sign winger Carl Baker and defender Jordan Spence without their League Cup run, says executive director Andrew Cullen.
"We've been able to make two signings, as well as give new contracts to Mark Randall and Dele Alli," Cullen told BBC Three Counties Radio.
"We wouldn't have been able to do that without this cup run."
Tuesday night was MK's first ever appearance in the last 16, but the run will be most fondly remembered by supporters for the second-round upset against Manchester United.
|MK Dons' League Cup run|
|Round one: MK 3-1 AFC Wimbledon|
|Round two: MK 4-0 Man Utd|
|Round three: MK 2-0 Bradford|
|Round four: MK 1-2 Sheff Utd|
That game in August attracted a crowd of 26,969 - the biggest in the club's 10-year history - and, combined with the finances from a win over rivals AFC Wimbledon in the previous round, former West Ham defender Spence and ex-Coventry man Baker were offered deals.
It also gave boss Karl Robinson the ability to hand an improved contract to in-demand midfielder Dele Alli.
But Cullen also hopes the run will have as long-lasting affect on the future of the club.
"Beating Manchester United certainly created a buzz around Milton Keynes and encouraged more people to come to the stadium," he said.
"We've seen a three-fold increase in the number of junior members and it gives us a lot to look forward to."