The Rossoneri official stated that the club will never be able to match the midfielder's salary at Madrid, while revealing that Malaga have enquired about Robinho's availability
The 30-year-old has been linked with a new challenge after enduring an injury-blighted spell with Los Blancos since joining the club in 2009.
Italian sources had reported that the Rossoneri were interested in swapping Zlatan Ibrahimovic for Kaka, but Galliani says that the Serie A outfit would need to break the bank to be able to match the Brazilian's wages at the Santiago Bernabeu.
"He has a salary which is impossible to be supported by Italian clubs," Galliani told reporters. "He has another three years on his contract with Real Madrid.
"Our tax system does not allow Italian clubs to pay those wages. I am 100 per cent sure that he will not return to Milan."
The Rossoneri are reportedly ready to listen to offers for Robinho as they look to generate funds after refusing Paris Saint-Germain's €46 million offer for Thiago Silva.
"Robinho to Malaga? There have only been informal talks with the Spanish club, nothing concrete," Galliani added.