Generally, taxpayers can deduct interest expenses paid or accrued in the taxable year. However, if the section 163(j) limitation applies, the amount of deductible business interest expense in a taxable year cannot exceed the sum of: the taxpayer's business interest income for the taxable year; 30% of the taxpayer's adjusted taxable income (ATI) for the taxable year; and the taxpayer's floor plan financing interest expense for the taxable year.