Understanding the OBBBA car loan interest deduction
The IRS has released proposed regulations explaining how the new car loan interest deduction—created under the One Big Beautiful Bill Act (OBBBA)—is expected to operate. While the deduction has received significant attention for potentially reducing the cost of buying a new vehicle, the rules contain strict eligibility criteria and numerous technical limitations. As a result, many taxpayers may not qualify despite the provision's broad initial appeal. Because these regulations are still in proposed form, they may change before becoming final, and taxpayers should monitor future guidance.
The following questions and answers (Q&A) summarize the core elements of the proposal.
The deduction may be claimed by:
- Individuals
- Decedents’ estates
- Non grantor trusts
Taxpayers may claim the deduction whether they itemize or take the standard deduction.
The deduction applies to:
- Tax years beginning after Dec. 31, 2024, and before Jan. 1, 2029
- Loans originated after Dec. 31, 2024
Keep in mind that only interest paid or accrued during these tax years qualifies for the deduction.
The deduction is subject to (1) income limits and (2) an annual cap.
1. Income limits
The available deduction phases out based on modified adjusted gross income (MAGI):
- Phaseout begins at:
o $100,000 for single filers
o $200,000 for married filing jointly
- Fully phased out at:
o $150,000 for single filers
o $250,000 for married filing jointly
Taxpayers with MAGI within these ranges receive only a partial deduction; those above the upper thresholds receive none.
2. Annual cap
The deduction is capped at $10,000 per return. This limit applies regardless of filing status–single and joint filers have the same $10,000 cap.
Only new vehicles that meet specific requirements (detailed below) are eligible. Used vehicles do not qualify. Those vehicles meeting the requirements are defined as a ‘qualifying vehicle.’
A qualifying vehicle is one that must:
-
Be brand‑new (original use begins with the taxpayer);
-
Be used primarily for personal purposes (more than 50%);
-
Have its final assembly occur in the United States; and
-
Fall within one of the following categories:
- Passenger car
- SUV
- Minivan
- Pickup truck
- Certain motorcycles
Taxpayers may confirm U.S. final assembly using the vehicle’s information label or VIN, detailed in the proposed regulations. Vehicles used for commercial, fleet or business purposes (other than as an employee) generally do not qualify.
To qualify, the loan must:
- Originate after Dec. 31, 2024;
- Be secured by the vehicle via a first lien;
- Be used exclusively to purchase the qualifying vehicle;
- Have interest paid or accrued by the taxpayer during the tax year;
- Generally not be a refinance;
- Not be from a related party; and
- Not be a lease (leases do not qualify)
Taxpayers must also report the vehicle identification number (VIN) each year the deduction is claimed.
Monitor for further guidance and evaluate eligibility carefully
The new car loan interest deduction has generated excitement for offering up to $10,000 in annual interest deductions on qualifying new vehicle loans. However, the proposed regulations impose strict income limits, narrow vehicle and loan requirements, and detailed reporting obligations. Many taxpayers may find that the deduction provides limited or no benefit once these limitations are applied. Since the regulations are not yet final, taxpayers and lenders should monitor future IRS updates and evaluate eligibility carefully before relying on this deduction for tax planning or reporting purposes.
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