Car loan interest deduction by state
The deduction itself is federal — it applies in all 50 states if your vehicle and income qualify. What changes state to state is whether your state income tax also reflects it. Find your state below.
The federal car loan interest deduction is above-the-line, so it lowers your federal AGI whether or not you itemize. States fall into two groups: those with no income tax (nothing extra to consider — the federal deduction is your whole benefit) and those with an income tax, where the deduction usually flows through if the state conforms to federal AGI — but you should confirm your state hasn't decoupled from this brand-new 2025 provision.
No state income tax 9
No state income tax means no state conformity question — the federal deduction is your entire benefit.
States with an income tax 42
The federal deduction applies; whether it also lowers your state tax depends on your state's conformity — each page explains what to confirm.