As much as three quarters of this year's bonuses awarded to Citigroup bankers could come in the form of cash and common stock options that could be sold as early as April, according to a source close to the bank.

Bankers at Citigroup will receive between 25% and 40% of their total bonus package in the form of deferred, restricted shares which will vest at regular intervals, the source said. That means between 60% and 75% would be paid either in cash or stock that could be sold within three months.