Current Iowa Corporation Tax Rates (Effective 1981-2009, so far)
Taxable income over:	But not over:	The tax is:			Of the amount over:
$0	$25,000		+	6%	$0
$25,000	$100,000	$1,500.00	+	8%	$25,000
$100,000	$250,000	$7,500.00	+	10%	$100,000
$250,000		$22,500.00	+	12%	$250,000