How the One Big Beautiful Bill Act reaches Alabama
ADOR’s executive summary (October 31, 2025, updated November 10) says Alabama conforms to certain federal provisions on a rolling basis, and then marks each provision Yes or No. Individual income tax starts from Alabama adjusted gross income rather than federal taxable income, which is why several of the new below-the-line federal deductions do not carry over.
- Tied to federal: 100% bonus depreciation, the higher Section 179 limits, Section 174A domestic research expensing, the Section 163(j) change for individuals and corporations, and the SALT cap change.
- Not tied: the qualified tips deduction (federal maximum $25,000), the qualified overtime deduction and the senior deduction.
- Vehicle loan interest is tied to federal, with Alabama authority in section 40-18-15. The federal cap is $10,000 a year.