Well, half of it anyway.
Speaking to journalist Armando Torno on Italy's Radio 24, he disclosed that he'll be paying over nearly half of both the $1m Birgit Nilsson and the recently-awarded Paolo Borsellino prize money to the Italian taxman.
He took the opportunity to lash out at colleagues who criticise Italian political policies whilst living outside the country as tax exiles. "That is their choice and everyone is free to do whatever he wants," he said, "but you cannot keep up residence outside Italy and spit on your country."
Muti wisely mentioned no names, but the Italian papers were quick to point out that he might have been thinking of Luciano Pavarotti, Andrea Bocelli, Ennio Morricone and Claudio Abbado, all of whom are or were Monaco residents at some point.