Auto Loan Calculator
Calculate your monthly car payment including sales tax, registration fees, and trade-in value.
What this calculator does
The Auto Loan Calculator estimates your result instantly from the values you enter, using standard auto loans formulas. Calculate your monthly car payment including sales tax, registration fees, and trade-in value. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate for planning rather than financial advice.
Your Auto Loan Summary
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What This Means
About Auto Loan Calculator
The Auto Loan Calculator estimates a fixed monthly vehicle-loan payment after accounting for vehicle price, sales tax, registration or dealer fees, down payment, and trade-in value. It also reports the financed amount, total interest, and total cost represented by the entered values.
In the shipped calculation, sales tax is applied to the full vehicle price. Actual taxable amounts can vary, so use the result as an estimate based on the inputs and formula shown here.
Formula & Mathematical Calculation
Sales tax = Vehicle price × Tax rate
Amount financed = max(0, Vehicle price + Sales tax + Fees − Down payment − Trade-in)
Monthly payment = Financed amount × [r(1 + r)n] ÷ [(1 + r)n − 1]
r is APR divided by 100 and 12, and n is the term in months. At 0% APR, payment = Amount financed ÷ n. Total cost = all loan payments + down payment + trade-in.
Calculation Example
Example: For a $32,000 vehicle, $5,000 down payment, no trade-in, 7% sales tax, $500 fees, 6.5% APR, and 60 months, sales tax is $2,240.00 and the amount financed is $29,740.00. The monthly payment is $581.90, total interest is $5,173.83, and total cost is $39,913.83.
Key Benefits
- Includes the entered sales tax and fees in the purchase breakdown
- Accounts for down payment and trade-in value
- Supports 0% APR and zero financed balance
- Shows monthly payment, total interest, and total cost
How to Use this Calculator
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Enter vehicle costs
Provide the vehicle price, sales-tax percentage, and registration or dealer fees. -
Enter upfront value
Add the down payment and trade-in value. -
Set financing terms
Enter APR and select the loan term in months. -
Review the estimate
Compare amount financed, monthly payment, total interest, and total cost.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Rates and contributions are assumed to stay constant for the whole period unless the form asks for them separately.
- Results use standard financial formulas and ignore fees, penalties and promotional terms that are not entered above.
- Inflation, tax changes and market volatility are not modelled unless a field for them is provided.
- Amounts are unit-agnostic: results are returned in the same currency you enter.
What it does not cover
- Auto Loan Calculator produces estimates for education and planning, not a quote, offer or professional advice.
- Real-world outcomes differ when fees, taxes, rounding rules or provider-specific terms apply.
- Local regulations and tax rules vary by country and change over time; verify current rules for your jurisdiction.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For decisions with lasting financial impact, confirm the numbers with a qualified professional.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.
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Next step: browse the full Auto Loans calculators or read the related guides for context before you decide.