Last updated November 14, 2026

Tax disclaimer

General information, not tax advice. Vehicles Over 6,000 lbs and its products explain IRS and state rules in plain English. They are not a substitute for advice from a qualified tax professional about your situation.

No professional relationship

Atomic Development is not a CPA firm, enrolled agent, law firm or tax preparer. Reading the Site, using a calculator, or buying a product does not create an advisor-client relationship.

Rules and figures change

Section 179 limits, the heavy-SUV cap, bonus depreciation rates and state conformity change by law and inflation adjustment, often every year. Each page shows when its figures were last checked. Always confirm current figures with IRS sources (Publication 946, Publication 463, the Instructions for Form 4562) and your state's tax agency before you file.

Your facts decide the result

Whether you qualify, and how much you can deduct, depends on your vehicle's GVWR and design, the date it was placed in service, your business-use percentage, your business income, your entity type and your state. Examples on the Site use assumed numbers and are illustrations only. We do not guarantee any deduction, tax saving or outcome.

Vehicle data

GVWR figures come from manufacturer specifications and can vary by year, trim, drivetrain and package. The label on your vehicle's driver-side door jamb is the source that counts.

Calculators

Calculators simplify the rules and may not cover every case (for example, mid-quarter convention, trade-ins, leased vehicles, or entities other than sole proprietorships). Use the results as a starting point, not a filing.

Affiliate links

Some links, such as to mileage-tracking apps, are affiliate links. We may earn a commission at no extra cost to you. This doesn't change what we recommend.