The rules at a glance
| Federal | Massachusetts | |
|---|---|---|
| Deduction | Up to $10,000 of qualified interest a year | Not allowed |
| Income phaseout | Above $100,000 MAGI ($200,000 joint) | Not applicable |
| Loan date | Originated after 31 December 2024 | Not applicable |
| Vehicle | New (original use starts with you), final assembly in the U.S., under 14,000 lbs gross vehicle weight rating | Not applicable |
| Use | Personal use, not business or commercial | Not applicable |
| Itemizing needed? | No; available with the standard deduction | Not applicable |
| Where claimed | Schedule 1-A, with the VIN | Not adopted (TIR 26-4) |
Which vehicles qualify
The IRS describes a qualified vehicle as a car, minivan, van, SUV, pickup truck or motorcycle with a gross vehicle weight rating under 14,000 pounds that has undergone final assembly in the United States. The original use must start with you, so used vehicles do not qualify, even if bought with a new loan.
The loan must have been used to buy the vehicle, and the vehicle must be for personal use rather than business or commercial use.
- New, not used
- Final assembly in the United States
- Car, minivan, van, SUV, pickup or motorcycle under 14,000 lbs GVWR
- Loan originated after 31 December 2024
- Personal use
What Massachusetts does
Massachusetts does not allow the deduction. DOR's guidance on differences from federal law says so directly, and TIR 26-4 lists the car loan interest provision as not conforming. There is no Massachusetts deduction for personal car loan interest.
So the deduction lowers only your federal tax. If you bought a new vehicle in 2025 or 2026 on a loan, the Form 1 will look the same as if you had paid cash.
Illustrative example. A single buyer in Mansfield with $70,000 of income finances a new, U.S.-assembled SUV in March 2025 and pays $2,400 of interest during 2025. The full $2,400 is deductible on the federal Schedule 1-A because income is below $100,000. At a 22% federal bracket that is worth about $528. On the Massachusetts return, nothing changes.
Records to keep
Lenders must file information returns with the IRS and send borrowers a statement of qualified interest. Keep that with the purchase paperwork, because the return needs the VIN, and the final-assembly location is a condition of the deduction.
- Lender's year-end statement of interest paid
- Purchase contract showing the vehicle was new and the date
- Loan agreement showing the origination date
- The Vehicle Identification Number (VIN)
- Evidence of U.S. final assembly, such as the window sticker
What the deduction is worth
The deduction reduces taxable income, so its value depends on your federal bracket. It has no effect on Massachusetts tax. The table uses round, illustrative interest amounts for a single filer below the $100,000 phaseout.
| Interest paid in the year | At 12% bracket | At 22% bracket | At 24% bracket |
|---|---|---|---|
| $1,500 | $180 | $330 | $360 |
| $3,000 | $360 | $660 | $720 |
| $6,000 | $720 | $1,320 | $1,440 |
Dates that decide eligibility
Two dates matter. The loan must have originated after 31 December 2024, so a loan signed in December 2024 does not qualify even though interest is paid in 2025. And the deduction runs only for tax years 2025 through 2028, so interest paid in 2029 on a qualifying loan is not deductible under this provision unless Congress extends it.
The deduction is also limited to interest actually paid during the year, as shown on the lender's statement, not the total interest over the life of the loan.
- Loan signed on or after 1 January 2025: may qualify
- Loan signed in 2024 or earlier: does not qualify
- Interest paid 2025 through 2028: deductible within the limits
- Used vehicle, whenever bought: does not qualify
Where we come in
We check the vehicle and loan against each condition before claiming the deduction, and keep it off the Massachusetts return. Before we start, we give you a scope and a price in writing.
Figures on this page were checked against the IRS and Massachusetts sources listed alongside on 28 Sep 2026. They change — confirm the current amount before relying on one.
General information for owner-led businesses, not advice for your specific situation. Tax and accounting rules change, and how they apply depends on facts particular to your business. Talk to us — or to another qualified professional — before acting on anything here.
