Connecticut heavily relies on its state income tax to pay the bills. It covered about half of general fund revenue in fiscal year 2017 by bringing in $8.42 billion to Connecticut's coffers, according to the state Comptroller's Office.

A good chunk that money comes from a handful of communities, with Greenwich, Stamford, Fairfield and Westport residents paying more than $1.2 billion in 2016.

A 2014 report by the Department of Revenue Service found that the top 357 households paid $682 million in personal income tax, which was about 11.7 percent of all Connecticut income tax collected for that year. A handful of those in the .02% moving or changing their tax filings can have a large effect on the state's coffers.