WORKED CAR-PAYMENT EXAMPLE
Car payment calculator with taxes and dealer fees
The advertised price is not the loan. Taxes, fees, trade equity, cash down, APR, and term all sit between the listing and the monthly payment.
Start with the out-the-door price
asking price − dealer discount or rebate
adjusted vehicle price + sales tax + dealer fees + accepted add-ons + title and registration
Only after the purchase total is clear should the trade, payoff, and cash down change the amount financed. Separating those steps makes it harder for one favorable number to hide a worse one elsewhere.
$35,000 car example
Assume a $35,000 asking price, $1,500 discount, $999 taxable documentation fee, $450 in title and registration charges, 7% tax, and no add-ons or trade.
| Step | Amount |
|---|---|
| Adjusted vehicle price | $33,500.00 |
| Estimated tax on price and doc fee | $2,414.93 |
| Documentation fee | $999.00 |
| Title and registration | $450.00 |
| Estimated out-the-door price | $37,363.93 |
Turn that total into a payment
With $3,000 cash down and no trade, the estimated amount financed is $34,363.93. At 7.5% APR for 60 months, the estimated payment is $688.58 per month. The loan would collect about $6,950.87 in interest if carried for the full term.
$37,363.93 out the door − $3,000 cash down = $34,363.93
Actual lender schedules can differ by cents, payment dates, financed products, taxes, and fees. Use the written buyer's order and Truth in Lending disclosure for the final figures.
What changes the payment most?
- Selling price and add-ons: every financed dollar can also collect interest.
- Trade equity: a payoff larger than the trade allowance increases the next loan.
- APR: a higher rate raises both the payment and lifetime interest.
- Term: more months can lower the payment while raising the total cost.
Run your own quote through the DealProof out-the-door price and payment calculator, or compare two terms side by side with the auto-loan comparison calculator.
Reviewed September 10, 2026. The FTC advises buyers to get the total price in writing and compare total cost—not only the monthly payment. See its official guide to financing or leasing a car. Example calculations use DealProof's published methodology.