780 / What adjustments are made to taxable income in computing alternative minimum taxable income (AMTI)?

In general, the following adjustments are made to taxable income in computing alternative minimum taxable income (see Q 778, generally): (1) generally, property must be depreciated using a less accelerated method or the straight line method over a period which is longer than that used for regular tax purposes, except that a longer period is not required for property placed in service after 1998; (2) the AMT net operating loss is deductible only up to 90 percent of AMTI determined without regard to such net operating loss; (3) no deduction is allowed for miscellaneous itemized deductions; (4) generally, no deduction is allowed for state and local taxes unless attributable to a trade or business, or property held for the production of income (recovery of state tax disallowed for AMT purposes in a previous year is not added to AMTI in the year recovered); (5) medical expenses are allowed as a deduction only to the extent such expenses exceed 7.5 percent of adjusted gross income; (6) interest on indebtedness secured by a primary or second residence is generally deductible (within dollar limitations) if incurred in acquiring, constructing, or substantially improving the residence; however, the amount of refinanced indebtedness with regard to which interest is deductible is limited to the amount of indebtedness immediately prior to refinancing; (7) no standard deduction is allowed; (8) no deduction for personal exemptions is allowed; (9) the limitation on itemized deductions for upper-income taxpayers does not apply; (10) the taxpayer will include any amount realized due to a transfer of stock pursuant to the exercise of an incentive stock option; (11) AMTI is determined using losses from any tax shelter farm activity (determined by taking into account the AMTI adjustments and tax preferences) only to the extent that the taxpayer is insolvent or when the tax shelter farm activity is disposed of; and (12) passive activity losses (determined by taking into account the adjustments to AMTI and tax preferences) are not allowed in determining AMTI except to the extent that the taxpayer is insolvent.¹

1.  IRC §§ 56, 58.