A tax created to prevent high-income individuals, corporations, trusts, and estates from escaping tax requirements through legal tax breaks. It is increasingly affecting more and more people. The AMT adds specific tax-preference items back into adjusted gross income and applies a different rate (25% and 28%) from the regular tax to larger amounts of income. In 2007, tax payers who paid the AMT in 2003 or earlier became eligible for a 20% (or at least $5,000) tax credit on their paid AMT plus 20% of the remaining balance over each of the next four years. This refundable credit applies to individuals with an adjusted gross income (AGI) of over $156,400 and to married couples with over $234,600 AGI.