A car loan calculator tells you exactly what a vehicle will cost you every month and over the full life of the loan — before you walk into a dealership or sign anything. Enter your vehicle price, down payment, trade-in value, interest rate, and loan term to see your monthly payment, total interest, total cost, and a complete amortization schedule. In 2026, with the average new car price over $48,000 and auto loan rates ranging from 6% to 14% depending on credit score, knowing your numbers before you negotiate is more important than ever.

Use the calculator above now. If you have a trade-in, enter its value — it directly reduces the loan amount. Select your state to auto-fill the correct sales tax rate. Click Advanced Options to roll fees into the loan or enter cash incentives. The results update instantly.

How to Use This Car Loan Calculator

The calculator has two main sections. In Loan Details, enter the vehicle price (the out-the-door price or the sticker price — your choice), your down payment, any trade-in value, the interest rate (APR), and your preferred loan term. The down payment percentage updates automatically as you type.

In Location and Fees, select your state to auto-fill the state sales tax rate — you can edit this if your county rate differs. Click Advanced Options to enter the amount you still owe on your trade-in (negative equity), title and registration fees, any cash incentives or manufacturer rebates, and whether to roll taxes and fees into the financed amount rather than paying them upfront.

After clicking Calculate, you see four result cards: your monthly payment (with payoff date), loan amount, total interest, and total cost. The donut chart shows the principal vs. interest split, and the line chart shows your loan balance declining over time. The OBBBA tax tip appears automatically if you have an interest cost. Click Show Schedule to expand the amortization table — switch between Annual Summary and Monthly Detail views.

What Is a Good Car Loan Interest Rate in 2026?

Auto loan rates vary significantly by credit score, lender type, and whether the vehicle is new or used. The table below shows average APRs by credit tier based on Experian data:

Enter your actual or expected APR in the calculator above. Even a 1% difference in rate has a meaningful impact on total cost. On a $30,000 loan at 60 months, going from 6.5% to 7.5% adds approximately $170 in total interest — not enormous, but worth negotiating for.

Loan Term: How Length Affects Your Payment and Total Cost

Choosing a longer loan term lowers your monthly payment but increases the total interest you pay. The table below shows the tradeoff on a $30,000 car loan at 7.0% APR:

The 60-month term is the most popular in the US for a reason — it balances monthly affordability with total cost reasonably well. The 84-month term saves $142/month compared to 60 months but costs $2,332 more in interest. Unless cash flow is severely constrained, the shorter term is almost always the better financial choice.

Down Payment: How Much Should You Put Down on a Car?

Financial advisors typically recommend a down payment of at least 20% on a new car and 10% on a used car. Here is why those thresholds matter:

Avoiding negative equity (being upside down): New cars depreciate approximately 15–25% in the first year. If you finance 100% of a $35,000 car and it drops to $28,000 in value after 12 months, you owe $7,000 more than the car is worth. A 20% down payment ($7,000) puts you roughly break-even with depreciation in year one, protecting you if you need to sell or trade in the vehicle early.

Reducing monthly payment: Every $1,000 in additional down payment reduces the monthly payment by approximately $20 on a 60-month loan at 7% APR. An extra $5,000 down saves about $100/month — meaningful over five years.

Reducing total interest: A larger down payment reduces the principal, which reduces the interest charged over the life of the loan. On a $35,000 car at 7% over 60 months, putting $7,000 down (20%) instead of $3,500 (10%) saves approximately $450 in total interest.

The OBBBA Auto Loan Interest Deduction in 2026

The One Big Beautiful Bill Act, signed July 4, 2025, introduced a new deduction for auto loan interest. For tax year 2026, qualifying taxpayers can deduct up to $10,000 in auto loan interest on loans for new, US-assembled vehicles. The deduction phases out at $100,000 of adjusted gross income for single filers and $200,000 for married filing jointly.

This deduction does not appear in the calculator’s numbers — it depends on your individual tax situation. At a 22% marginal tax rate, $10,000 in deductible interest would reduce your federal tax bill by $2,200. Consult a tax professional to determine whether your vehicle and income qualify before counting on this benefit.

New Car vs. Used Car: Which Makes More Financial Sense?

New cars come with manufacturer warranties, the latest safety features, and better financing rates (see the APR table above). Used cars cost less upfront and have already absorbed the steepest depreciation. The right choice depends on how long you plan to keep the vehicle.

If you plan to keep the car for 7–10 years, buying new and amortizing the higher price over that period often makes more sense than buying used and facing higher repair costs as the vehicle ages. If you plan to keep it 3–4 years, a 2–3 year old certified pre-owned vehicle often offers the best value — it has lost the first-year depreciation but still carries a manufacturer-backed warranty.

Use this car loan calculator to compare both scenarios: enter the new car price and rate versus the used car price and (higher) rate side by side to see the monthly payment and total cost difference for your specific situation.

Frequently Asked Questions

How is a monthly car payment calculated?

Your monthly car payment is calculated using the standard loan amortization formula: M = P × [r(1+r)^n] ÷ [(1+r)^n − 1], where P is the loan principal, r is the monthly interest rate (annual APR ÷ 12), and n is the number of months. The calculator above handles this automatically. The key inputs that affect your payment are the loan amount (vehicle price minus down payment and trade-in), the APR, and the loan term.

What credit score do I need for a car loan?

You can get a car loan with almost any credit score, but the rate and terms vary significantly. A score above 661 (Prime tier) typically gets you a competitive rate near 6–7% for new cars in 2026. Scores below 600 (Subprime) typically result in rates of 11–21%, which dramatically increases the total cost of the loan. If your score is below 660, improving it by even 40–50 points before applying can save you thousands in interest.

Should I finance through a dealership or a bank?

Get pre-approved by your bank or credit union before visiting a dealership. Pre-approval gives you a rate benchmark so you can compare it against the dealer’s financing offer. Dealers sometimes offer manufacturer-subsidized rates (0% or 1.9% financing) that beat bank rates — but only on specific models and only with strong credit. Never negotiate the monthly payment at a dealership — always negotiate the total price and then apply your financing separately.

What is GAP insurance and do I need it?

GAP (Guaranteed Asset Protection) insurance covers the difference between what you owe on your car loan and what the car is worth if it is totaled or stolen. It is most useful when you have a small down payment (under 10%) and a long loan term (72–84 months), where you are most likely to be underwater. GAP is typically not worth buying if you put 20% or more down or are financing for 48 months or less.

How much car can I afford?

A widely used guideline is the 20/4/10 rule: 20% down payment, loan term of 4 years or less, and total monthly car expenses (payment + insurance) no more than 10% of gross monthly income. On a $6,000/month gross income, that means no more than $600/month in car-related expenses. Use the calculator above to find a vehicle price that fits within your budget, then adjust the down payment and term to hit your target monthly payment.

What happens if I pay extra on my car loan?

Extra principal payments reduce your loan balance faster, which reduces the total interest you pay and shortens the payoff timeline. On a $30,000 loan at 7% over 60 months, adding just $50 extra per month saves approximately $400 in interest and pays the loan off about 3 months early. Always specify that extra payments should be applied to principal, not future payments — confirm this with your lender.

What is the difference between APR and interest rate on a car loan?

The interest rate is the base cost of borrowing the principal. APR (Annual Percentage Rate) includes the interest rate plus any lender fees rolled into the loan. For most straightforward auto loans, the APR and interest rate are the same or very close. The difference becomes meaningful when dealers charge origination fees or include other costs in the financing. Always compare APRs when shopping multiple lenders — it is the apples-to-apples number.

Can I refinance my car loan to get a lower rate?

Yes — auto loan refinancing is straightforward if your credit has improved since you took out the original loan or if market rates have dropped. Most lenders require the vehicle to be under a certain age (typically under 10 years) and have a minimum remaining balance. Refinancing from 9% to 6.5% on a $20,000 remaining balance over 36 months saves approximately $960 in interest. Check with your bank or an online lender for a refinance quote.

Related Calculators

• Loan EMI Calculator — Calculate monthly payments and amortization for any type of loan.
• Budget Planner Calculator — Map your full monthly budget to confirm a car payment fits your income.
• Debt Payoff Calculator — Model paying off your car loan early with extra payments.
• Savings Goal Calculator — Plan how long it takes to save your target down payment.
• Net Worth Calculator — Track your car loan as a liability in your overall financial picture.