Auto Finance Calculator with Tax
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Reviewed by Calculator Editorial Team
This auto finance calculator with tax helps you estimate your total auto loan costs, including taxes and fees. Whether you're buying a new or used car, understanding your total financial commitment is essential for making informed decisions.
How to Use This Calculator
Using this auto finance calculator is simple:
- Enter the loan amount (the price of the car).
- Specify the interest rate (APR).
- Enter the loan term in years.
- Add any down payment if applicable.
- Include estimated taxes and fees.
- Click Calculate to see your results.
The calculator will show your monthly payment, total interest paid, and total cost of the loan.
Formula Used
The calculator uses the standard auto loan formula to calculate monthly payments:
Monthly Payment = P * (r(1 + r)^n) / ((1 + r)^n - 1)
Where:
- P = Principal loan amount (loan amount + taxes and fees - down payment)
- r = Monthly interest rate (annual rate / 12)
- n = Number of payments (loan term in years * 12)
After calculating the monthly payment, the calculator adds up all payments to determine the total interest paid and the total cost of the loan.
Worked Example
Let's say you're buying a car with these details:
- Car price: $25,000
- Down payment: $3,000
- Taxes and fees: $1,500
- Loan term: 5 years
- Interest rate: 4.5% APR
The principal loan amount is $25,000 + $1,500 - $3,000 = $23,500.
The monthly interest rate is 4.5% / 12 = 0.375% or 0.00375.
The number of payments is 5 * 12 = 60.
Plugging these into the formula:
Monthly Payment = $23,500 * (0.00375(1 + 0.00375)^60) / ((1 + 0.00375)^60 - 1)
Monthly Payment ≈ $425.32
Total interest paid = ($425.32 * 60) - $23,500 ≈ $1,518.80
Total cost of the loan = $23,500 + $1,518.80 ≈ $25,018.80
Frequently Asked Questions
What is included in the taxes and fees?
Taxes and fees typically include sales tax, registration fees, title fees, and any other costs associated with purchasing the vehicle. These can vary by state and dealer.
How accurate is this calculator?
This calculator provides an estimate based on the information you provide. Actual loan terms and costs may vary depending on the lender and specific loan conditions.
Can I use this for both new and used cars?
Yes, this calculator can be used for both new and used cars. The inputs and calculations remain the same regardless of the vehicle type.