---
title: "Car loan interest deduction final rules take effect Nov 9"
description: "Car loan interest deduction: final rules take effect Nov 9, 2026. IRS, effective Nov 9, 2026. What changed, who it affects, and the official source."
canonical: https://resellerindex.com/changes/irs/2026-11-09-irs-car-loan-interest-final-regulations/
last_updated: 2026-10-23
publisher: "The Reseller Index"
license: "CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)"
---

[Change tracker](https://resellerindex.com/changes/) / [IRS](https://resellerindex.com/changes/irs/)

# Car loan interest deduction: final rules take effect Nov 9, 2026

1. [IRS](https://resellerindex.com/changes/irs/) Tax Effective Nov 9, 2026 · announced Sep 21, 2026

   Final regulations on the new deduction for car loan interest (T.D. 10054, Internal Revenue Bulletin 2026-39, Sept. 21, 2026) take effect Nov. 9, 2026. The deduction is up to $10,000 of qualified interest per return, reduced by $200 for each $1,000 of modified AGI over $100,000 ($200,000 joint), for loans taken out after 2024 on a new vehicle with final assembly in the US, in tax years 2025 through 2028. It covers only a vehicle bought for personal use, meaning you expected more than half its use to be personal. In the regulation's own example, a sole proprietor expecting 60% business use does not qualify, though the business share of the interest stays deductible as a business expense. General information, not tax advice: check with a tax professional.

   Your net on a $10 / $25 / $50 sale: n/a / n/a / n/a

   A tax deduction rule, not a fee. It covers only personal-use vehicles; the business share of interest stays a business expense.

   Source: [IRS, Internal Revenue Bulletin 2026-39 (T.D. 10054)](https://www.irs.gov/pub/irs-irbs/irb26-39.pdf) · verified Oct 23, 2026

## Cite this

The Reseller Index change tracker, "Car loan interest deduction: final rules take effect Nov 9, 2026," https://resellerindex.com/changes/irs/2026-11-09-irs-car-loan-interest-final-regulations/, verified Oct 23, 2026. Free to reuse with a link (CC BY 4.0). First published on the tracker Oct 23, 2026.

## More IRS changes

- [Draft 2026 Schedule C instructions give vehicle loan interest its own line (16b)](https://resellerindex.com/changes/irs/2026-10-08-irs-schedule-c-draft-vehicle-loan-interest-line/)
- [Payment apps' 24% backup withholding: the $20,000 and 200-transaction floor is final](https://resellerindex.com/changes/irs/2026-08-10-irs-backup-withholding-20000-final/)
- [IRS raises the 2026 business mileage rate to 76 cents from July 1](https://resellerindex.com/changes/irs/2026-07-01-irs-mileage-76-cents/)
- [1099-NEC and 1099-MISC threshold rises to $2,000 (was $600)](https://resellerindex.com/changes/irs/2026-01-01-irs-1099-nec-misc-2000-threshold/)

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