Car Loan Interest Deduction Calculator: Is Your Loan Eligible — and for How Much?
The Omnibus Budget & Broad-Based Relief Act (OBBBA) introduces a new tax break for auto loans. You can deduct up to $10,000 of interest paid per year (from 2025 to 2028), provided your loan and vehicle meet 5 strict eligibility rules.
Live calculation updated for 2026.
OBBBA Car Loan Deduction
What is the Quick Answer for the OBBBA Car Loan Deduction?
Under the OBBBA, you can deduct up to $10,000 of auto loan interest per year from 2025 through 2028. To qualify, you must have a new vehicle with final assembly in the United States, and the loan must have originated after December 31, 2024. This is an above-the-line deduction on Schedule 1-A, meaning it is fully cumulative with your standard deduction.
Why Does This Deduction Exist and Who Really Benefits?
While many tax calculators only give you the rules, here is the exclusive insight into how the car loan deduction actually works in practice.
Why Is the Income Phase-Out So Aggressive?
The phase-out for the car loan deduction is twice as steep ($200 per $1,000 over) compared to the tax-free tips or overtime deductions. This was intentionally designed to limit the benefit to the middle class and prevent wealthy buyers of luxury vehicles from subsidizing their purchases.
Why Do Auto Loans Benefit Most in Year 1?
Because auto loans are front-loaded with interest (amortization), you pay the vast majority of your interest in the first 24 months. By Year 4, the deduction is almost negligible.
Why Was Final Assembly the Deciding Factor?
The final assembly rule was chosen over a "domestic brand" rule to satisfy trade agreements and incentivize manufacturing jobs specifically within US borders, regardless of corporate headquarters.
What Are the 5 Rules That Decide Your Eligibility?
Unlike the other OBBBA tax breaks (like those for tips or overtime), the car loan deduction is highly restrictive. Your loan must meet all 5 criteria to be eligible:
How Can You Check "Final Assembly in the United States"?
Just because you bought an "American brand" (like Ford or Chevrolet) does not mean the vehicle was assembled in the US. Similarly, many "foreign brands" (like Toyota or Honda) assemble vehicles in the US.
The definitive way to check is using the Vehicle Identification Number (VIN). The first character of the VIN indicates the country of origin. A 1, 4, or 5 generally indicates the United States. However, you should use the official NHTSA VIN decoder or check the Monroney sticker on the window of the new car to confirm the final assembly point.
Note: You will be required to report the VIN on Schedule 1-A Part IV to claim this deduction.
| Loan Amount | APR | Year 1 Interest | Year 2 Interest | Year 3 Interest |
|---|---|---|---|---|
| $30,000 | 6% | $1,634 | $1,310 | $966 |
| $40,000 | 8% | $2,945 | $2,382 | $1,770 |
| $60,000 | 10% | $5,578 | $4,557 | $3,428 |
| $80,000 | 10% | $7,437 | $6,075 | $4,571 |
How Does the Income Phase-Out Work?
The car loan deduction phases out for higher earners based on Modified Adjusted Gross Income (MAGI). This phase-out is twice as aggressive as the ones for overtime or tips, reducing your deduction by $200 for every $1,000 your MAGI exceeds the threshold.
- Single / Head of Household: Phase-out begins at $100,000 and the deduction is completely zeroed out at $150,000.
- Married Filing Jointly: Phase-out begins at $200,000 and the deduction is completely zeroed out at $250,000.
How Do You Claim It on Schedule 1-A Part IV?
When you file your taxes, you will use Schedule 1-A to claim this deduction. Specifically, Part IV handles the car loan deduction. You will need to enter:
- The vehicle's VIN.
- The total interest paid during the year (from your lender's annual statement or Form 1098).
- Your MAGI calculation to apply any phase-out limits.
Should You Buy a New Car Just for the Deduction?
In a word: no. Tax deductions only return a percentage of what you spent based on your marginal tax bracket. For example, if you pay $10,000 in interest and are in the 22% bracket, the deduction saves you $2,200 in taxes. You still spent $7,800 net on interest. Furthermore, new cars depreciate rapidly. You should never buy a new vehicle or take on debt solely to harvest a tax deduction. However, if you are already planning to buy a new car, you should certainly prioritize a US-assembled vehicle to take advantage of the savings.
What Are Frequently Asked Questions?
Does the deduction apply to used cars?
No. Used cars are entirely excluded from this deduction. The vehicle must be brand new.
Are vehicle leases eligible for the deduction?
No. Leases do not qualify for the OBBBA auto loan interest deduction.
Can I deduct interest on a motorcycle or RV?
The law specifies "passenger vehicle". You should carefully consult the Schedule 1-A instructions or a tax professional regarding motorcycles, RVs, or heavy-duty trucks.
Is a loan from 2024 eligible if I pay interest in 2026?
No. The loan must have originated after December 31, 2024.
Is the $10,000 limit per year or total?
The $10,000 cap is an annual limit. You can deduct up to $10,000 of eligible interest paid each year from 2025 through 2028.
When does the car loan deduction expire?
The OBBBA auto loan interest deduction is a temporary measure that is scheduled to expire at the end of 2028.