Time and manner of making election
(b) Time and manner of making election. A taxpayer is deemed to have made an election under section 195(b) to amortize start-up expenditures as defined in section 195(c)(1) for the taxable year in which the active trade or business to which the expenditures relate begins. A taxpayer may choose to forgo the deemed election by affirmatively electing to capitalize its start-up expenditures on a timely filed Federal income tax return (including extensions) for the taxable year in which the active trade or business to which the expenditures relate begins. The election either to amortize start-up expenditures under section 195(b) or to capitalize start-up expenditures is irrevocable and applies to all start-up expenditures that are related to the active trade or business. A change in the characterization of an item as a start-up expenditure is a change in method of accounting to which sections 446 and 481(a) apply if the taxpayer treated the item consistently for two or more taxable years. A change in the determination of the taxable year in which the active trade or business begins also is treated as a change in method of accounting if the taxpayer amortized start-up expenditures for two or more taxable years.