Private-Party Car Loan Interest Deduction Calculator
For credit-union and P2P loans on private sales.
The short answer: At the numbers below, the deduction is $2,400 — $288 back at 12% ($11 per paycheck).
New, US-assembled vehicle only
Modified Adjusted Gross Income
Car Loan Interest Deduction
$2,400
✅ You qualify for the full deduction
⚠️ This calculator provides estimates for informational and educational purposes only. It is not tax advice. Results are based on the One Big Beautiful Bill Act (OBBBA) and IRS Schedule 1-A. Consult a qualified tax professional for your specific situation.
Where You Buy Doesn't Matter
The deduction follows the loan being a qualified vehicle loan — a credit-union private-party loan qualifies exactly like dealer financing.
- • Credit union private-party loans → qualify
- • Personal unsecured loan used to buy a car → doesn't qualify (not secured by the vehicle)
- • Seller-financed (owner carries the note) → qualifies if documented as a vehicle loan
Worked Example
Single buyer, $2,400 of interest on a private-party loan.
- • Deduction $2,400; $288 at 12%
Keep Reading
Frequently Asked Questions
Do private-party car loans qualify for the interest deduction?
Yes when structured as a vehicle loan secured by the car — the common credit-union private-party product. Unsecured personal loans do not.
What if I paid the seller with a personal loan?
A signature loan isn't a vehicle loan; its interest doesn't qualify. Restructure as a secured auto loan if you want the deduction.