HB 2003 -- Missouri Middle Class Tax Cut Act Sponsor: Harris (23) This bill establishes the Missouri Middle Class Tax Cut Act which specifies that, beginning with tax year 2006, a resident taxpayer with a combined Missouri taxable income of less than $100,000 will be taxed at the rate of 5.5% instead of the current 6% for taxable income over $9,000.Copyright (c) Missouri House of Representatives