Pre S corp start-up expenses
Are business expenses incurred in starting an S corp tax deductible even though they were incurred prior to the official corporation start date e.g. purchasing computer, filing fees, legal expenses?
Are business expenses incurred in starting an S corp tax deductible even though they were incurred prior to the official corporation start date e.g. purchasing computer, filing fees, legal expenses?

Yes these get entered by journal entry to start up costs.
Marc Barnes
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For business start-up and organization costs paid or incurred after September 8, 2008, a corporation can deduct up to $5000.00 of such costs for the year it begins business. The $5000.00 deduction is reduced by the amount the total cost exceeds $50,000.00. If the total costs are $55,000.00 or more, the deduction is reduced to zero. Any costs not deducted must be amortized over a 180 month period, beginning with the month the corporation begins business.