Tillman was not part of the spate of new contracts offered to players in their final year of their respective deals at the Bears and will likely be a free agent when the market opens in March.
"I'm not really worried about it," Tillman told the Chicago Tribune. "I have some decisions I have to make in the next couple of weeks, couple of months.
"I am just going to see what happens. I have some options, I have some thoughts."
The 32-year-old played eight games and had 42 tackles and three interceptions in the 2013 season.