The Argentina striker has reportedly not been paid his estimated ?200,000-a-week salary since the end of November and has been fined ?1.2m for gross misconduct over his unauthorised exile in his homeland. Tevez has appealed against the fine.
He is also believed to have forfeited ?6m in loyalty bonuses over his repeated requests to leave the club.
The 27-year-old has not played for City since apparently refusing to come on as a substitute during a Champions League game at Bayern Munich on September 27, which saw him fined two weeks' wages for breach of contract.
City are seeking to sell Tevez in the current transfer window, but mooted moves to AC Milan, Inter Milan and Paris Saint-Germain have failed to materialise.
In a rare move, the club's chairman, Khaldoon al-Mubarak, spoke out to criticise the conduct of Milan, who Tevez has identified as his preferred destination.
"As things stand, AC Milan are not an option for Carlos," Al-Mubarak told Abu Dhabi's The National newspaper.
"If they want to be a consideration in this transfer window, they would do better to stop congratulating one another and begin to look at how they would meet our terms.
"Carlos remains a player with contractual obligations to Manchester City for the next two-and-a-half seasons.
"Unless we receive an offer we deem appropriate, the terms of his contract will be enforced.
"Inter Milan and Paris Saint-Germain approached discussions with us in good faith. It is always a positive experience to deal with people with a professional approach."
City are believed to be holding out for ?25m plus add-ons for Tevez, who joined the club in 2009 after a two-year loan spell at city rivals Manchester United.
His current contract is due to expire in June 2014.