5 ILCS 420/1-105.6
"Income" means, for the purposes of Sections 4A-102 and 4A-103, pension income and any income from whatever source derived, required to be reported on the filer's federal income tax return, including, but not limited to: compensation received for services rendered or to be rendered (as required to be reported on any Internal Revenue Service forms, including, but not limited to, Forms W-2, 1099, or K-1); earnings or capital gains from the sale of assets; profit; interest or dividend income from all assets; revenue from leases and rentals, royalties, prizes, awards, or barter; forgiveness of debt; and earnings derived from annuities or trusts other than testamentary trusts. "Income" does not include compensation earned for service in the position that necessitates the filing of the statement of economic interests, or investment or interest returns on items excluded from the definition of "asset", or income from the sale of a personal residence or personal vehicle.
5 ILCS 420/1-105.6