Formula
Auto loan payment formula
Payment = loan amount x monthly rate / (1 - (1 + monthly rate)^-months)Loan amount includes tax and fees, then subtracts down payment and trade-in value.
Money Calculators
Auto Loan Calculator
Use this auto loan calculator to estimate a car payment from vehicle price, down payment, trade-in, sales tax, fees, APR, and loan term.
Reviewed May 25, 2026EstimateFormula shown
Live calculator
Auto loan
Monthly payment$613.17
Based on a 60 month term.
Loan amount$31,040.00
Estimated sales tax is $2,240.00.
Total interest$5,749.95
Estimated interest paid over the full loan term.
What is being financed
The estimated financed amount is $31,040.00after adding sales tax and fees, then subtracting the down payment and trade-in value. Interest is estimated over 60 monthly payments.
Amount financed
This shows how the vehicle price turns into the loan balance.
| Part | Amount |
|---|---|
| Vehicle price | $32,000.00 |
| Sales tax | $2,240.00 |
| Fees | $800.00 |
| Down payment | -$4,000.00 |
| Trade-in value | -$0.00 |
| Loan amount | $31,040.00 |
Amortization preview
Annual principal, interest, and remaining balance.
| Year | Principal | Interest | Ending balance |
|---|---|---|---|
| Year 1 | $5,384.40 | $1,973.59 | $25,655.60 |
| Year 2 | $5,767.90 | $1,590.09 | $19,887.71 |
| Year 3 | $6,178.71 | $1,179.28 | $13,709.00 |
| Year 4 | $6,618.79 | $739.20 | $7,090.21 |
| Year 5 | $7,090.21 | $267.78 | $0.00 |
How to use
Steps
- Enter the vehicle price.
- Add down payment, trade-in, tax, and fees.
- Enter APR and loan term in months.
- Compare payment, loan amount, and total interest.
Example
Sample calculation
Vehicle price$32,000
Down payment$4,000
APR and term6.9% for 60 months
Amount financed$31,040
Payment$613.17/month
Calculator use
Best for
- Quick monthly car payment from vehicle price, down payment and trade-in value.
- Personal finance scenarios before changing a budget, loan, savings goal, or purchase plan.
- Monthly cash flow, affordability, debt payoff, or future-value estimates.
- Assumption checks before talking with a lender, tax preparer, employer, or financial professional.
Before relying on it
Check first
- Entering vehicle price, down payment and trade-in value from different time periods or scenarios.
- Mixing gross income, take-home income, one-time costs, and monthly costs in the same comparison.
- Forgetting taxes, fees, insurance, irregular bills, or minimum payments when using an estimate.
- Treating a planning estimate as a quote, tax filing result, approval decision, or guaranteed return.
Benchmarks
How to read the result
The calculator is a decision aid, not a fixed rule. Use the output to compare scenarios and document your assumptions.
Down paymentLowers risk
A larger down payment can reduce the payment, total interest, and negative-equity risk.
60 monthsCommon comparison
Often used as a middle-ground term when comparing offers.
72+ monthsLong term
May lower the payment but can increase total interest and negative equity risk.
Calculator accuracy
Methodology and assumptions
The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.
Formula
Payment = loan amount x monthly rate / (1 - (1 + monthly rate)^-months)
Inputs used
Vehicle price, Down payment, Trade-in value, Sales tax, APR, Term months
Limitations
Results are estimates for quick planning and should be checked before important financial, legal, tax, health, or business decisions.
Last reviewed
May 25, 2026
Cite this page
Toolkit Shelf. Auto Loan Calculator. Retrieved May 25, 2026, from https://toolkitshelf.com/tools/auto-loan-calculator
FAQ
Common questions
How is a car payment calculated?
An auto loan payment is based on loan amount, monthly interest rate, and number of monthly payments.
Does this include sales tax?
Yes. Enter your estimated sales tax rate and fees so they can be included in the loan amount.
Should I include trade-in value?
Yes. Enter trade-in value if it reduces the amount you need to finance.
Why can a longer auto loan be risky?
A longer term may lower the monthly payment, but it can increase total interest and make it easier to owe more than the vehicle is worth.