What is a good car loan interest rate?

As of 2025, good rates are 4–6% for new cars and 5–7% for used cars. Excellent credit (750+) can secure rates as low as 3–4%. Rates change with the Fed rate, so check current averages.

How much does 1% interest rate matter?

On a $30,000 loan for 60 months, each 1% increase in rate adds about $800–$900 in total interest and $14–$16 to the monthly payment. Over the full loan, small rate differences compound significantly.

Can I negotiate the interest rate with a dealer?

Yes. Dealers often mark up the lender's rate by 1–2% for their own profit. Show them your pre-approved rate and ask them to beat it. They can often match or come close to competitive offers.

Is a credit union better for auto loans?

Credit unions often offer the lowest rates because they're non-profit. National average credit union rates are typically 0.5–1.5% below bank rates. Join one before you start car shopping.

Does the vehicle age affect the interest rate?

Yes. New car rates are typically 0.5–1% lower than used car rates. For vehicles older than 5–7 years, rates increase further. Some lenders won't finance vehicles older than 10 years.

Should I take 0% financing or a cash rebate?

Do the math: compare the total cost with 0% financing versus a discount with your best available rate. Often, if your alternative rate is below 4–5%, the cash rebate is worth more than 0% financing.

Interest Rate Impact Calculator

Compare how different auto loan interest rates affect your monthly payment and total cost. See payments at 3%, 5%, 7%, and 9% APR side by side.

Loan Amount

Loan Term

Your Pre-Approved Rate (optional)

APR	Monthly	Total Interest	Total Paid
3%	$503.12	$2,187.40	$30,187.40
5%	$528.39	$3,703.67	$31,703.67
7%	$554.43	$5,266.01	$33,266.01
9%	$581.23	$6,874.04	$34,874.04

Savings: 3% vs 9%

$4,686.64

Total interest saved with lowest rate

Planning notes, formulas, and examples

About the Interest Rate Impact Calculator

The interest rate on your auto loan has a dramatic effect on both your monthly payment and the total amount you'll pay over the life of the loan. Even a 1–2% difference in APR can mean hundreds or thousands of dollars in savings.

Auto loan rates depend on your credit score, loan term, vehicle age, down payment, and the lender. Rates range from under 4% for excellent credit with short terms to over 15% for subprime borrowers. Shopping around and getting pre-approved can save you thousands.

This calculator compares multiple interest rate scenarios so you can see exactly how much a better rate is worth. Use it to motivate rate shopping between banks, credit unions, and the dealer's finance department.

When This Page Helps

Seeing the dollar impact of different rates motivates you to negotiate harder and shop more broadly. The difference between a 5% and 8% rate on a $30,000 loan can exceed $2,500 in total interest. This calculator quantifies that difference.

How to Use the Inputs

Enter the loan amount (vehicle price minus down payment and trade-in).
Enter the loan term in months.
Review the comparison table at 3%, 5%, 7%, and 9% APR.
Use the "custom rate" field to add your specific pre-approved rate.
Compare monthly payments, total interest, and total cost.

Formula used

Monthly Payment = P × [r(1+r)^n] / [(1+r)^n − 1]
where P = loan amount, r = monthly rate, n = months
Total Interest = (Monthly Payment × n) − P

Example Calculation

Result: 3% saves $4,549 vs 9%

On a $28,000 loan for 60 months: at 3% APR, the monthly payment is $503 with $2,177 total interest. At 9% APR, the payment is $581 with $6,845 total interest. Getting the 3% rate saves $78/month and $4,668 in interest.

Tips & Best Practices

Get pre-approved by a bank or credit union before visiting the dealer.
A credit score above 720 typically qualifies for the best rates.
Credit unions often offer rates 1–2% lower than banks and dealers.
Shorter loan terms get lower rates — 48 months is usually cheaper than 72.
Used car rates are typically 0.5–1% higher than new car rates.
Never accept the dealer's first offer — use your pre-approval as leverage.

Rate Shopping Strategy

The single most effective way to get a low rate is to get pre-approved by 2–3 lenders before visiting the dealer. Credit unions, online lenders, and your bank are all good options. Multiple auto loan inquiries within 14 days count as one credit pull.

Credit Score Tiers

Auto loan rates are tiered by credit score. Super Prime (781+) gets the best rates. Prime (661–780) is 1–2% higher. Non-Prime (601–660) is 3–5% higher. Subprime (below 600) may pay 10–18%. Improving your score before buying can save thousands.

The True Cost of Higher Rates

A buyer with average credit (670) versus excellent credit (780) might pay 8% versus 5% on a $30,000 loan. Over 60 months, that's $38,799 total versus $33,967 — a $4,832 difference for the exact same car.

Sources & Methodology

Last updated: February 8, 2026

Frequently Asked Questions

As of 2025, good rates are 4–6% for new cars and 5–7% for used cars. Excellent credit (750+) can secure rates as low as 3–4%. Rates change with the Fed rate, so check current averages.