What this calculator does
The auto loan calculator on CalcPilot turns a common finance question into an instant answer — no spreadsheets, no sign-up, and no hidden assumptions.
The auto loan calculator estimates your true monthly car payment by factoring in the vehicle price, down payment, trade-in equity, sales tax, title and registration fees, APR, and loan term. Most states let you deduct the trade-in value from the taxable amount, which lowers your sales tax bill.
How to use the Auto Loan Calculator
- Start by entering **Car Price** — this anchors every downstream number in the auto loan calculator.
- Fill in **Down Payment**, **Trade-in Value**, **Trade-in Owed**, **Sales Tax**, **Title, Reg & Fees**, **APR** to reflect your specific situation.
- Set **Loan Term**; the result and chart recalculate the moment you finish typing.
- Review the breakdown card for the components that make up the headline number.
- Use Copy, Share, or Print to save the exact scenario — or star it to keep it in your favorites.
The formula
Loan = (Price + Sales Tax + Fees) − Down Payment − Net Trade-in; Payment M = P·r(1+r)^n / ((1+r)^n − 1).
Worked example
A $35,000 car with $5,000 down, a $3,000 trade-in, 7% sales tax, $500 in fees, at 7.5% APR for 5 years, produces a loan of about $29,740 and a monthly payment near $596 — roughly $6,000 in total interest.
Common mistakes
- Shopping the monthly payment instead of the total cost
- Forgetting sales tax and DMV fees in the loan balance
- Assuming trade-in equity when you still owe on the old car
- Rolling negative equity into a new loan without noticing
When to use it
Use before you walk into a dealer, when comparing financing offers from a bank or credit union, or when deciding whether to stretch the term to 72 or 84 months.
Pro tips for the Auto Loan Calculator
- Save your favorite scenarios by clicking the star icon — they're stored locally, no account needed.
- For big decisions, run best-case, expected, and worst-case scenarios and compare the breakdowns side by side.
- Copy the result to paste it directly into email, Notion, or a spreadsheet cell.
Frequently asked questions
›Does sales tax get financed?
In most states, yes — dealers roll tax, title, and registration into the loan unless you pay them up front.
›Does a trade-in lower sales tax?
In most US states, sales tax is charged only on the price after the trade-in value is subtracted, which is a real cash saving.
›How long should an auto loan be?
60 months or less keeps interest reasonable and helps avoid being underwater when the car depreciates.
›Preapproval or dealer financing?
Get preapproved by your bank or credit union first, then let the dealer try to beat it.
›What APR should I expect?
Rates vary widely by credit score — excellent credit typically qualifies for the lowest new-car rates, while subprime borrowers can pay double.
›New vs used car rates?
Used cars usually carry a higher APR than new cars, sometimes by 1–2 percentage points.
›Is the Auto Loan Calculator free to use?
Yes. Every calculator on CalcPilot, including the Auto Loan Calculator, is free with no sign-up, no watermark, and no export limit.
›Can I use this on mobile?
Yes — the auto loan calculator is fully responsive, and results, charts, and the share button all work on phones and tablets.
Embed this calculator
Drop the Auto Loan Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.
<iframe src="https://calcpilot.tools/calculators/auto-loan-calculator?embed=1" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px;max-width:720px;" loading="lazy" title="Auto Loan Calculator — CalcPilot"></iframe>Related calculators
Hand-picked next steps if you found the Auto Loan Calculator useful.