While it is only a suggestion, and you may choose to give more or less, the Chicagoland Chamber of Commerce Political Action Committee suggests the following annual contributions amounts:

$25,000 - $50,000   Chairman’s Trust

$10,000 - $24,999   Business Roundtable

$5,000 - $9,999   Champion’s Club

$1,000 - $4,999    Guardian of Free Enterprise

$250 - $999   Business Leader