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About this site
An independent guide to the One Big Beautiful Bill Act car-loan interest deduction.
This site exists because, when the deduction launched, the accurate information was scattered across IRS pages, law-firm memos, and dealership marketing — and there was no single place to just check whether you qualify and estimate what you’ll save. So we built one, grounded in the IRS guidance and the proposed regulations, with a citation on every figure.
Our two free tools — the eligibility checker and the savings calculator — run entirely in your browser; we don’t collect your numbers.
We are not affiliated with the IRS or any government agency, and this is not tax advice. We may earn a commission if you click certain partner links, at no cost to you; it never affects our guidance or the rules we report.
Spotted something out of date? The rules are still being finalized — see Sources & methodology.