(1) Passive activity losses (determined by taking into account the adjustments to AMTI and tax preferences) are not allowed in calculating AMTI.1(2) Generally, in calculating AMTI, equipment must be depreciated using a 150 percent declining balance method switching to the straight-line method at a time to maximize the deduction over the regular recovery periods.
Property is assigned to various class lives in Revenue Procedure 88-22.2 These class lives can also be found in IRS Publication 946.
1. IRC § 58(b).
2. 1988-1 CB 785.