Unlock Tax Savings with the New Auto Loan Interest Deduction

Every tax season brings a mix of pressure and possibilities. For business owners who have been building for several years, staying current with tax law is not just about compliance. It is about recognizing opportunities to steward your resources wisely and retain more of what you earn.

A new federal tax provision, created under the “One Big Beautiful Bill,” introduces a temporary deduction for interest paid on certain auto loans. While the law is in effect, some of the detailed guidance is still in proposed form, which makes it especially important to understand how the rules apply.

If you regularly track expenses in QuickBooks and pay close attention to your financial categories, this is one area worth adding to your radar.

What Is the Deduction?

For tax years 2025 through 2028, eligible taxpayers may deduct up to $10,000 per year in interest paid on loans used to purchase qualifying new vehicles.

To qualify:

• The loan must be originated after December 31, 2024

• The vehicle must be new (not used)

• The loan must be secured by a first lien on the vehicle

• The vehicle must be purchased primarily for personal use

  
  

This deduction is claimed below the line, meaning you can take it whether you itemize deductions or use the standard deduction. It will be reported on a new Schedule 1-A, and you will need to include the vehicle’s VIN on your return.

Who Is Eligible?

Individuals and Pass-Through Owners

This deduction is primarily designed for individuals, but it also applies to:

• Sole proprietors

• Single-member LLCs (disregarded entities)

• Certain trusts and estates

  
  

If your business income flows through to your personal return, this likely applies to you.

Income Limitations

The deduction begins to phase out based on income:

• $100,000 for single filers

• $200,000 for married couples filing jointly

The reduction is gradual, decreasing by $200 for every $1,000 of income above these thresholds.

Important note: To claim this deduction, married taxpayers generally must file jointly.

Deduction Cap

• Maximum deduction: $10,000 per tax return per year

  
  

What Vehicles Qualify?

Not every vehicle is eligible. The rules are designed to encourage domestic manufacturing.

To qualify, the vehicle must:

• Be a new passenger vehicle (car, SUV, pickup truck, minivan, van, or motorcycle)

• Have a gross vehicle weight rating under 14,000 pounds

• Be assembled in the United States

  
  

You can verify the final assembly by:

• Checking the vehicle label at the dealership

• Using the VIN

• Looking it up through the NHTSA VIN decoder

  
  

What Interest Qualifies?

Eligible interest generally includes:

• Interest on the vehicle purchase price

• Interest on sales tax and required vehicle fees

• Interest on service contracts or extended warranties financed with the vehicle

  
  

However, some items are excluded:

• Interest on negative equity rolled into the loan

• Interest on insurance products

• Interest tied to unrelated items (such as trailers)

  
  

What About Refinancing?

If you refinance your loan:

• You may continue to deduct interest only on the remaining balance of the original loan

• Any additional cash taken out does not qualify

  
  

Mixed-Use Vehicles: Personal and Business

This is where many business owners need to pay close attention.

If you use your vehicle for both personal and business purposes, there are coordination rules between:

• Business interest deductions, and

• This new personal auto loan interest deduction

  
  

Unlike a simple percentage split, the rules allow for some flexibility in how the interest is treated, depending on your situation.

In practice:

• You may deduct a portion as a business expense

• You may deduct some or all remaining interest under this new personal deduction

• The total benefit is still subject to the $10,000 annual cap

  
  

Because of this complexity, accurate mileage tracking remains essential. Clean records will give you options when it comes time to prepare your return.

Loan Requirements: What Matters

To qualify:

• The loan must be secured by the vehicle (first lien)

• The loan must be used specifically to purchase the vehicle

• The lender must not be a related party (for example, a family member)

  
  

Loans from banks, credit unions, and dealerships generally qualify as long as these requirements are met.

Leases do not qualify.

Documentation and Reporting

Lender Reporting

If you pay $600 or more in interest, your lender is expected to provide a new form:

• Form 1098-VLI

  
  

Transitional Rule for 2025

For the first year (2025):

• Lenders may provide a statement showing interest paid instead of the official form

  
  

Be sure to keep this documentation with your tax records.

Strategic Considerations for Business Owners

This deduction is more than a tax break. It is a planning opportunity.

1. Monitor Your Income

If your income is near the phaseout thresholds, there may be value in:

• Deferring income

• Accelerating expenses

  
  

2. Evaluate Timing of Vehicle Purchases

If a vehicle purchase is already in your plans, confirm:

• U.S. assembly

• Loan structure

  
  

This can make a meaningful difference in your total tax savings.

3. Strengthen Your Bookkeeping

Ensure your records clearly separate:

• Business vehicle expenses

• Personal vehicle interest

  
  

This will make it significantly easier to apply the rules correctly and maximize your benefit.

Final Thoughts

This new deduction introduces a meaningful opportunity, but it also adds a layer of complexity. Between income limits, vehicle qualifications, and mixed-use considerations, it is easy to overlook details that could either reduce your benefit or create risk.

With thoughtful planning and clean records, this is one more way to align your financial strategy with the long-term health of your business.

If you are considering purchasing a vehicle or want to understand how this fits into your broader tax strategy, now is a good time to have that conversation.