Loan desk
Auto Loan Calculator
Estimate an auto-loan payment from the amount financed or from price, upfront amounts, trade-in, and fees.
Auto Loan Calculator: Estimate a car-loan payment from the balance actually financed, or calculate that balance from vehicle price, down payment, trade-in credit and financed fees. A positive explicit amount financed takes precedence over the price breakdown. The result shows borrowing principal, regular monthly payment, modelled interest and scheduled repayments over the entered number of months. Runs 100% locally in your browser with zero server file uploads.
- Category
- Calculators
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Amount financed
$25,000.00
- Estimated monthly payment
- $495.03
- Total interest
- $4,701.80
- Total of scheduled payments
- $29,701.80
Amount financed = price − down payment − trade-in credit + financed fees; payment uses fixed-rate amortization.Principal, interest, and balance
Showing the first 12 payments and the final displayed payment. The engine uses the full bounded schedule.
| Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $495.03 | $349.20 | $145.83 | $24,650.80 |
| 2 | $495.03 | $351.23 | $143.80 | $24,299.57 |
| 3 | $495.03 | $353.28 | $141.75 | $23,946.29 |
| 4 | $495.03 | $355.34 | $139.69 | $23,590.94 |
| 5 | $495.03 | $357.42 | $137.61 | $23,233.53 |
| 6 | $495.03 | $359.50 | $135.53 | $22,874.03 |
| 7 | $495.03 | $361.60 | $133.43 | $22,512.43 |
| 8 | $495.03 | $363.71 | $131.32 | $22,148.72 |
| 9 | $495.03 | $365.83 | $129.20 | $21,782.89 |
| 10 | $495.03 | $367.96 | $127.07 | $21,414.93 |
| 11 | $495.03 | $370.11 | $124.92 | $21,044.82 |
| 12 | $495.03 | $372.27 | $122.76 | $20,672.55 |
| 60 | $495.03 | $492.16 | $2.87 | $0.00 |
- Amount financed is distinct from vehicle price: it reflects the balance actually borrowed after optional upfront amounts and financed fees.
- Actual APR, lender fees, taxes, add-ons, contracts, and payment timing can differ from this estimate.
- This is an educational estimate for a fixed-rate loan with monthly compounding and monthly payments.
- Taxes, insurance, mortgage insurance, HOA dues, origination charges, and other costs are not included unless an input says otherwise.
- Actual lender terms, APR, fees, rounding, payment dates, prepayment rules, and contracts can differ. This is not a credit offer or financial advice.
Formula and worked example
Amount financed = price − down payment − trade-in credit + financed fees; payment uses fixed-rate amortization.
A worked example with sample values:
| Inputs | |
|---|---|
| Amount financed | $25,000.00 |
| Annual interest rate | 7% |
| Term | 60 months |
| Results | |
|---|---|
| Amount financed | $25,000.00 |
| Estimated monthly payment | $495.03 |
| Total interest | $4,701.80 |
| Total of scheduled payments | $29,701.80 |
Vehicle price to a monthly payment
Let V be vehicle price, D down payment, T trade-in credit and F financed fees. Price-based principal P = V − D − T + F. With monthly rate i = annual percentage ÷ 100 ÷ 12 and n monthly payments, payment M = P × i ÷ (1 − (1 + i)^−n). At zero interest use P ÷ n.
Set Amount financed to 0, then enter V = $18,000, D = $3,000, T = $2,000 and F = $500. P = 18,000 − 3,000 − 2,000 + 500 = $13,500. At an illustrative 6% over 36 months, i = 0.005 and M = 13,500 × 0.005 ÷ (1 − 1.005^−36) = $410.70. The schedule totals $14,785.06 in payments and $1,285.06 interest.
Trade-in equity and repayment timing
CFPB's trade-in guidance (https://www.consumerfinance.gov/ask-cfpb/should-i-trade-in-my-car-if-its-not-paid-off-en-2045/) explains that outstanding old debt can change the new borrowing requirement. A vehicle's trade-in value is not automatically its usable equity. Confirm the complete financed balance before comparing terms or monthly payments.
CFPB's auto-loan amortisation guide (https://www.consumerfinance.gov/ask-cfpb/what-is-amortization-and-how-could-it-affect-my-auto-loan-en-771/) explains the changing interest and principal shares. This page assumes monthly interest periods; a daily-accrual contract can respond differently to early or late payment dates. Use the actual nominal borrowing rate, and compare APR and fees separately when assessing overall credit cost.
How to use it
- Enter the amounts, rate and duration shown in the worked example or your own scenario.
- Calculate to update the result and review the assumptions.
- Compare the formula and example before using the result for planning.
Privacy & limitations
Inputs and calculations stay in your browser. No values are uploaded.
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Frequently asked questions
Why are changes to vehicle price not changing my loan payment?
A positive Amount financed overrides the price, down-payment, trade-in and fee fields. Set Amount financed to 0 to use the price breakdown. Enter 0 in unused optional numeric fields; a blank field is not a reliable substitute for zero in this form.
Where do I enter money still owed on my trade-in?
There is no separate old-loan payoff field. Use a confirmed explicit financed balance that includes any rolled-over debt rather than subtracting the gross trade-in value as if it were all available credit. Do not also add that debt to fees when your explicit balance already includes it.
Are financed fees treated as interest or as extra principal?
They increase the borrowed balance in the price-based calculation and then accrue modelled interest like the rest of principal. Upfront fees paid separately do not belong in that field. The total scheduled repayments exclude the down payment, the trade-in's value and any separate cash expenses.
Embed this tool
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<p style="margin:4px 0 16px;font-size:13px"><a href="https://toea.com/auto-loan-calculator">Auto Loan Calculator</a> · TOEA</p>
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