Auto Payment Calculator with Tax and Fees
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Reviewed by Calculator Editorial Team
Calculating your auto payment including taxes and fees can help you understand your total monthly cost. This calculator provides an accurate breakdown of your auto payment, including sales tax, registration fees, and other common expenses.
How to Use This Calculator
Using this auto payment calculator with tax and fees is simple. Follow these steps:
- Enter the purchase price of the vehicle in the "Purchase Price" field.
- Select your state from the dropdown menu to apply the correct sales tax rate.
- Enter any additional fees such as registration fees, documentation fees, or other costs in the "Additional Fees" field.
- Enter the down payment amount in the "Down Payment" field.
- Enter the loan term in years in the "Loan Term" field.
- Enter the interest rate in the "Interest Rate" field.
- Click the "Calculate" button to see your total monthly payment.
The calculator will display your total monthly payment, including principal, interest, taxes, and fees. You can also view a breakdown of your payment in the chart below the result.
Formula Used
The auto payment calculator uses the following formula to calculate your monthly payment:
Monthly Payment = P * (r(1 + r)^n) / ((1 + r)^n - 1)
Where:
- P = Principal loan amount (Purchase Price - Down Payment + Additional Fees + Sales Tax)
- r = Monthly interest rate (Annual Interest Rate / 12 / 100)
- n = Number of payments (Loan Term in Years * 12)
The calculator also includes sales tax based on your selected state and adds any additional fees you enter.
Worked Example
Let's walk through an example to see how the calculator works. Suppose you're purchasing a car with the following details:
| Purchase Price | $25,000 |
|---|---|
| State | California |
| Additional Fees | $500 |
| Down Payment | $3,000 |
| Loan Term | 5 years |
| Interest Rate | 4.5% |
Using these values, the calculator would:
- Calculate the sales tax: $25,000 * 7.25% = $1,812.50
- Add the additional fees: $500
- Calculate the principal loan amount: $25,000 + $1,812.50 + $500 - $3,000 = $24,312.50
- Calculate the monthly interest rate: 4.5% / 12 = 0.375%
- Calculate the number of payments: 5 * 12 = 60
- Calculate the monthly payment using the formula: $24,312.50 * (0.00375(1 + 0.00375)^60) / ((1 + 0.00375)^60 - 1) ≈ $450.25
The total monthly payment would be approximately $450.25, which includes principal, interest, taxes, and fees.
Frequently Asked Questions
- What is included in the auto payment calculation?
- The auto payment calculation includes the principal loan amount, interest, sales tax, and any additional fees you enter.
- How accurate is this calculator?
- This calculator provides an estimate of your auto payment. For an exact figure, consult with your lender or financial advisor.
- Can I use this calculator for leases?
- No, this calculator is designed for auto loans only. For lease calculations, use a dedicated lease calculator.
- Does this calculator include insurance?
- No, this calculator does not include insurance costs. Insurance is typically paid separately by the policyholder.
- How often should I update my auto payment estimate?
- You should update your auto payment estimate whenever your loan terms, interest rates, or expenses change.