84-Month Car Loan Interest Deduction Calculator
For stretched terms on expensive vehicles.
The short answer: At the numbers below, the deduction is $4,400, worth $528 at 12% ($20 per paycheck).
New, US-assembled vehicle only
Modified Adjusted Gross Income
Car Loan Interest Deduction
$4,400
✅ 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.
Seven Years of Interest
84-month loans maximize lifetime interest — and the deduction merely claws back a fraction of it.
- • Interest deductible to $10,000/year
- • The deduction offsets, never justifies, long terms
- • Refinancing later resets the interest curve
Worked Example
MFJ borrower, $4,400 of annual interest.
- • Deduction $4,400; $528 at 12%
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Frequently Asked Questions
Do 84-month car loans qualify for the interest deduction?
Yes — any qualified auto loan's interest qualifies regardless of term.
Is the deduction a reason to stretch my term?
No — you save 12–35 cents per dollar of interest deducted. The deduction softens interest costs; it doesn't reverse them.