AN ACT CONCERNING THE AFFECTED BUSINESS ENTITY TAX AND THE CREDIT RELATED THERETO AND ESTABLISHING A SURCHARGE ON THE AMOUNT OF FEDERAL QUALIFIED BUSINESS INCOME DEDUCTIONS CLAIMED BY CERTAIN FILERS.

HB 5186 adjusts Connecticut's affected business entity tax and related credits for businesses claiming federal qualified business income deductions. It adds a 1% surcharge on the business entity tax and a 10% surcharge on federal deductions claimed by filers in the highest tax bracket. The bill also modifies tax credits: reducing the credit to 83.6% for high-bracket filers while increasing it to 93.01% for lower-bracket filers. These changes directly impact businesses using federal pass-through income deductions, particularly those in Connecticut's top tax rate category.