IL SB1800

Amends Section 803 of the Illinois Income Tax Act regarding payment of estimated taxes for taxpayers.

Increases the estimated tax threshold from $500 to $1,000 for taxable years ending on or after December 31, 2019.

Maintains threshold of $250 for taxable years ending before December 31, 2001, and $500 for taxable years ending between December 31, 2001 and December 31, 2018.

Requires four equal installments of estimated tax payments due on April 15, June 15, September 15, and January 15 (individuals) or December 15 (corporations).

Takes effect upon becoming law.