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Auto loan calculator

Calculate your monthly auto loan payment, total interest, and overall vehicle cost. Adjust vehicle price, down payment, interest rate, and loan term to find the best financing option for your budget.

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Enter your auto loan details to calculate monthly payments
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Quick Answers

Avg. new car rate (2026)

~7.1%

Min. down payment

10-20% recommended

Common loan terms

36 to 72 months

Best score for low rate

720+

Frequently asked questions

Common questions about auto loans and financing.

An auto loan calculator estimates your monthly car payment based on four inputs: the vehicle price, your down payment, the annual interest rate, and the loan term in months. It applies the standard amortization formula to produce your monthly principal-and-interest payment and your total interest cost over the life of the loan. This lets you compare different financing scenarios -- such as putting more money down, choosing a shorter term, or negotiating a lower rate -- before you visit a dealership or sign any loan documents.
Borrowers with excellent credit scores of 720 or above typically qualify for rates between 5% and 7% on new vehicles in the current rate environment. Used vehicle loans generally carry rates 1 to 3 percentage points higher due to increased lender risk. Rates above 10% suggest your credit profile may need improvement before financing, or that dealer financing is adding a markup above the lender's base rate. Always get pre-approved through your bank or credit union before visiting a dealership -- this gives you a benchmark to compare dealer-offered rates against.
Common terms range from 36 to 72 months. A longer term reduces your monthly payment but significantly increases your total interest cost and extends the period during which you may owe more than the vehicle is worth due to depreciation. A 48 or 60-month term is generally recommended as the best balance between manageable payments and reasonable total cost. Terms of 72 or 84 months should be used cautiously -- they can leave you financially underwater on a depreciating asset for years, making it difficult to trade in or sell the vehicle without bringing cash to the table.
Yes -- there are four main levers. A larger down payment reduces the loan principal directly, lowering both your monthly payment and total interest. Trading in your current vehicle applies its value as a credit toward the new purchase. Extending the loan term lowers the monthly payment but increases total interest paid, so this approach should be used carefully. Improving your credit score before applying is the most powerful long-term lever -- moving from fair to good credit can cut your rate by 3 to 5 percentage points, saving hundreds or thousands over the life of the loan.
Yes, and this is one of the most financially impactful steps you can take. Getting pre-approved through your bank or credit union gives you a confirmed rate and maximum loan amount before you set foot on a lot. This serves two purposes: it gives you a concrete benchmark to evaluate dealer financing against, and it shifts the negotiation away from monthly payment toward vehicle price -- the metric that actually determines what you pay. Dealers act as intermediaries for lenders and typically mark up the rate, keeping the spread as profit. Your pre-approval removes that leverage from them.

Related Guides

What Is a Credit Score?What Is APR?What Is a Loan Term?

About this calculator

This auto loan calculator uses the standard amortization formula to compute monthly principal-and-interest payments based on vehicle price, down payment, interest rate, and loan term. It does not include sales tax, registration fees, dealer fees, or insurance -- costs that vary by state and lender.

Average auto loan rate data referenced on this page is sourced from the Federal Reserve G.19 Consumer Credit report. Credit score benchmarks follow CFPB published guidelines.

MyLoanCalcs.com provides free educational calculators and does not offer financial advice, auto financing, or lending services. Always compare offers from multiple lenders before signing any loan agreement.

Before You Calculate

Understanding Your Auto Loan Calculator Results

Auto financing is one of the most negotiated -- and most misunderstood -- consumer transactions. The monthly payment is the number dealers want you to focus on. The total interest paid and loan term are the numbers that determine whether you made a sound financial decision.

This guide explains how to interpret your calculator results, which inputs matter most, and what to watch out for before signing a financing agreement.

How to Read Your Auto Loan Calculator Results

Follow these six steps to get a complete and accurate picture of your financing costs.

01

Enter the vehicle price after negotiation, not the sticker price

The loan amount should reflect the out-of-pocket vehicle cost after your down payment, not the MSRP on the window sticker. Dealers routinely negotiate, and the starting loan amount directly determines every other number the calculator produces. A $2,000 reduction in purchase price at 7% over 60 months saves $40 per month and $238 in total interest. Negotiate the price before discussing financing.

Pro tip: Research the fair market value at Edmunds or KBB before visiting a dealer. Aim to pay no more than invoice price on new vehicles.

02

Separate the vehicle price from add-ons and dealer fees

Dealers often roll extended warranties, gap insurance, paint protection, and documentation fees into the financed amount. These increase your loan balance, monthly payment, and total interest paid -- sometimes by thousands of dollars. Enter only the base vehicle cost in the calculator, then evaluate each add-on separately to decide if it is worth financing. Gap insurance in particular is often available cheaper through your own auto insurer.

Pro tip: Ask for an itemized out-the-door price in writing before signing anything. Documentation fees are often negotiable.

03

Use the APR, not the interest rate, for accurate comparisons

Dealer financing and bank loans may quote different figures -- some use the interest rate, some use APR. APR includes all fees and is the true comparison number. Manufacturer promotional rates (0% or 1.9% financing) are only available with strong credit and often require forgoing a cash rebate. Run the calculator at both the promotional rate with no rebate and a standard rate with the rebate applied to see which truly costs less.

Pro tip: On a $30,000 purchase, a $2,500 rebate vs. 0% financing depends on your alternative rate. Run both scenarios in the calculator.

04

Understand how loan term affects total vehicle cost

Longer loan terms -- 72 or 84 months -- dramatically reduce the monthly payment but significantly increase total interest paid and create negative equity risk. A $35,000 car at 7% over 84 months: monthly payment is $529, total interest is $9,412. Over 48 months: payment is $838, total interest is $2,222. The 84-month loan costs $7,190 more in interest alone. Longer terms also mean owing more than the car is worth for years.

Pro tip: Financial advisors generally recommend keeping auto loan terms at 48 months or fewer to avoid prolonged negative equity.

05

Check your credit score before applying

Auto loan rates tier sharply by credit score. The difference between excellent credit (750+) and fair credit (620-659) can be 6-8 percentage points on the same vehicle. On a $30,000 loan over 60 months, an 8% rate difference means $7,200 more in total interest. Check your credit report at annualcreditreport.com before applying. If your score is below 700, even a 3-6 month delay to improve it can save thousands.

Pro tip: Rate shopping with multiple lenders within a 14-day window typically counts as a single hard inquiry on your credit report.

06

Apply the 20/4/10 rule as a budget check

A widely-used auto affordability guideline is the 20/4/10 rule: put at least 20% down, finance for no more than 4 years, and keep total vehicle expenses (payment plus insurance) below 10% of gross monthly income. This rule protects against negative equity and overextension. Run the calculator using these parameters on your target vehicle to see if it fits within these guardrails before committing.

Pro tip: If the 20/4/10 rule pushes the monthly payment beyond your budget, the vehicle is likely priced above your means.

3 Common Mistakes When Financing a Vehicle

What to Do Next

These resources will help you understand your financing terms, compare offers, and make a confident vehicle purchase decision.

What Is APR?

The true annual cost of borrowing, including fees.

What Is Amortization?

How each payment splits between principal and interest.

Loan Comparison Calculator

Compare two financing scenarios side by side.

How to Compare Loan Offers

A framework for evaluating any loan.

What Is a Prepayment Penalty?

Know before you pay off early.

Personal Loan Calculator

Compare personal loan financing for your vehicle.

Methodology

How It Works

The auto loan calculator uses the standard amortization formula to calculate your monthly car payment based on the vehicle price minus your down payment, the annual interest rate, and the loan term.

The monthly payment formula is:

M = P x [r(1+r)^n] / [(1+r)^n - 1]

  • M = Monthly payment
  • P = Principal (vehicle price minus down payment)
  • r = Monthly interest rate (annual rate / 12 / 100)
  • n = Total number of payments (years x 12)

This shows your principal and interest payment. Your actual monthly cost may also include sales tax, registration fees, and insurance.

Step-by-Step

Worked Example

Let's calculate the monthly payment for a vehicle purchase:

Vehicle price: $32,500

Down payment: $5,000

Loan amount: $27,500

Interest rate: 5.23% annual

Loan term: 5 years

Step 1: Monthly interest rate: 5.23% / 12 / 100 = 0.004358

Step 2: Number of payments: 5 x 12 = 60

Step 3: Apply formula:

M = 27,500 x [0.004358(1.004358)^60] / [(1.004358)^60 - 1]

M = $521.86 per month

Total interest paid: $3,811.70 over 5 years

Total cost: $36,311.70

About the Author: De Van Do

De Van Do is the author and site builder behind MyLoanCalcs.com. With a background in technology, De Van Do built this site out of an interest in making financial calculations clear and accessible. De Van Do is not a licensed loan officer, mortgage broker, or financial advisor -- content on this site is for informational purposes only.