It appears that you’re running into the phase-out logic for the new "No Tax on Car Loan Interest" deduction (One Big Beautiful Bill Act (OBBBA) for the 2025 tax year). Single filer in 2025: the c...
See more...
It appears that you’re running into the phase-out logic for the new "No Tax on Car Loan Interest" deduction (One Big Beautiful Bill Act (OBBBA) for the 2025 tax year). Single filer in 2025: the car loan interest deduction begins to phase out at a Modified Adjusted Gross Income (MAGI) of $100,000 ($200,000 MFJ) and is completely gone at $150,000. The IRS reduces your maximum allowable deduction (not your actual expense) by $200 for every $1,000 you are over that $100,000 threshold. Full Deduction: $100,000 or less No reduction: $10,000 Your Situation: $138,000 ($38,000 over limit X $200/$1,000): $2,400 Fully Phased Out: $150,000 or more ($50,000 over limit X $200/$1,000): $0 Your MAGI is $138,000, so your personal cap for this deduction is $2,400. However, there is a secondary rule in the 2025 tax code (found in the new Schedule 1-A instructions): If your calculated "Allowable Deduction" (the $2,400 cap) is already significantly reduced by the phase-out, the IRS applies a floor. IRS 1040 (page 109) If your actual interest paid is less than the "reduction amount" already applied to your cap, the benefit often zeros out. Since you are $38,000 over the limit, the "penalty" to your deduction is $7,600 ($38 \times 200$). First Case: 10,000 (Max) - $7,600 (Phase-out) = $2,400 deduction. Second Case: $335 (Actual) - $7,600 (Phase-out) = $0 deduction. And finally... Make sure that your vehicle actually qualifies for the car interest-rate deduction: Must be the original owner (used cars don't count). The vehicle's final assembly must have been in the U.S. The loan must have originated after Dec 31, 2024.