material participation is not required. this is the reason some taxpayers may elect to amortize
Intangible drilling cost (IDC) is either capitalized and amortized or written off as an expense in the current year. If written off, there is a possibility that a portion of the entire excess IDC amount is included as a tax preference item subject to the alternative minimum tax. If capitalized and amortized, there is no tax preference on IDC.
