Alternative Minimum Tax (AMT) A tax calculation that adds certain tax preference items back into adjusted gross income. If AMT is higher than the regular tax liability for the year, the regular tax and the amount by which the AMT exceeds the regular tax are paid. Investopedia Says: AMT is designed to prevent taxpayers from escaping their fair share of tax liability by using certain tax breaks. Related Terms: Adjusted Gross Income - AGI Income Tax Tax Fairness Tax Increase Prevention and Reconciliation Act of 2005 - TIPRA |