Changelog
Tax-law and site updates for this independent calculator. Review banner date: October 31, 2026. This is not an IRS publication.
— Public contact address live
- Published contact@carinterestdeduction.com (Cloudflare Email Routing to a verified destination) on Contact and About, including for corrections.
- Added Organization schema email / contactPoint for the published address.
— Credibility and calculator transparency update
- Documented IRS Form 1098-VLI (Rev. December 2026) as the continuous-use instructions posted on IRS.gov (About page updated October 1, 2026).
- Added /methodology/ with multi-loan, cap, phase-out rounding, Schedule C/E/F exclusion, savings math, worked examples, and public test cases wired to unit tests.
- Calculator result breakdown: interest, cap, phase-out reduction, deductible amount, rate used, estimated savings; auto marginal-rate suggestion; deduction-not-credit note; tax-rules verified date; print/save.
- VIN results as US plant reported / Non-US plant reported / Unable to verify, with NHTSA detail, limitations, privacy note, and checklist feed.
- Guided eligibility checklist with IRS-linked ineligibility reasons.
- Added /changelog/ and /no-tax-on-car-loan-interest/; Article + BreadcrumbList schema and last-reviewed dates on article pages.
- Cloudflare Email Routing enabled (MX + verified destination); published contact@carinterestdeduction.com on Contact and About, including corrections.
— GEO / AI-crawler pass
- Expanded FAQ with speakable answers, HowTo/FAQ schema, IndexNow key and ping, llms.txt, AI-referral analytics, robots allowances for major AI crawlers.
- Published how-to-claim guide.