About

This site is an independent explanation of the federal deduction for qualified passenger vehicle loan interest, the amount Schedule 1-A calls “no tax on car loan interest.” It is not published by the Internal Revenue Service, the Treasury Department, a lender, a dealer, or a tax-preparation company. It does not prepare or file returns. No personal name is attached to the publisher; the site is operated independently.

The pages were checked against IRS forms and instructions available on IRS.gov as of the review date, including the 2025 Form 1040 instructions, Publication 501 (2025), Revenue Procedure 2025-32, the IRS Instructions for Form 1098-VLI (Rev. December 2026)—a continuous-use revision the IRS posted for calendar year 2026 and later (About Form 1098-VLI last reviewed or updated by the IRS on October 1, 2026)—and the final regulations published in the Federal Register on September 8, 2026. The review date shown in the banner is October 31, 2026. The 2026 Schedule 1-A cited here is the IRS draft created June 16, 2026, which the IRS marks “do not file.”

The calculator and the VIN lookup run in your browser. There is no account. If a figure on a page disagrees with a later IRS revision, the IRS revision controls. The source list is the set of documents used. For corrections to a cited figure or a broken source link, email contact@carinterestdeduction.com or use the contact page.

See the methodology for how the worksheet applies the cap and phase-out, and the changelog for tax-law and site updates.