What Is an Auto Loan? Definition, Rates, and How Car Loans Work
Last updated 04/13/2026 by
Ante Mazalin
Edited by
Andrew Latham
Summary:
An auto loan is a secured installment loan used to finance the purchase of a vehicle, where the car itself serves as collateral, and the borrower repays the principal plus interest in fixed monthly payments over a term typically ranging from 24 to 84 months.
Auto loans are available through several types of lenders, each with different rates and terms.
- Bank and credit union loans: Best for buyers who want to compare financing independently before stepping into a dealership, often offering more competitive rates than dealer financing.
- Dealer financing: Best for buyers who want a streamlined single-stop transaction, though convenience can come at the cost of a higher interest rate.
- Online auto lenders: Best for comparing multiple loan offers quickly, including for borrowers with fair or thin credit who may be declined by traditional banks.
- Manufacturer financing (captive lenders): Best when automakers run promotional 0% APR offers, which represent genuine savings for buyers who qualify and don’t need to negotiate the purchase price.
For most American households, a vehicle is the second-largest purchase after a home. Most people need financing to make it happen — and the terms of that financing can mean thousands of dollars of difference in total cost over the life of the loan.
The rate you secure, the term you choose, and where you source your financing all interact in ways that aren’t obvious until you run the numbers.
According to SuperMoney’s auto loan industry study, auto loans reached $1.607 trillion in Q4 2023 — briefly making them the second-largest source of consumer debt in the U.S., surpassing student loans. The average new vehicle loan amount stood at $38,587, while delinquency rates climbed above their 2020 peak, signaling that elevated prices and rising rates are straining borrowers across all credit tiers.
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How an Auto Loan Works
An auto loan is a secured installment loan where the vehicle serves as collateral — if you stop making payments, the lender can repossess the car. The lender pays the dealer directly (or the private seller), and you repay the balance in fixed monthly installments following an amortization schedule until the lien on the title is released.
For a full walkthrough of the mechanics — including how new vs. used vehicle loans differ and what happens at each stage of the process — see how car loans work.
Auto Loan Interest Rates
Auto loan rates vary significantly by credit tier, loan term, vehicle type, and lender. According to Experian’s State of the Automotive Finance Market report, the average new-vehicle loan rate in recent quarters has ranged between 6–8% for prime borrowers and 12–15%+ for subprime borrowers. Used vehicle rates run roughly 2–4 percentage points higher across all credit tiers.
The primary factors that determine your rate:
- Credit score: The single biggest driver. Borrowers with FICO scores of 781+ (super prime) access the lowest rates. Those with scores below 600 (subprime) may face rates above 15%.
- Loan term: Longer terms lower the monthly payment but increase total interest paid. A $30,000 loan at 7% APR costs $3,231 in interest over 3 years but $7,227 over 7 years — more than twice as much.
- Down payment: A larger down payment reduces the loan-to-value (LTV) ratio, which signals lower risk to lenders and can result in a better rate offer.
- Vehicle type: New vehicles typically qualify for lower rates than used vehicles. Older vehicles may face rate premiums or financing restrictions.
- Lender type: Credit unions — as nonprofits capped at 18% APR under NCUA guidelines on most products — often offer the most competitive rates for qualified members.
| Credit Tier | FICO Score Range | Typical New Car APR | Typical Used Car APR |
|---|---|---|---|
| Super Prime | 781–850 | ~5–6% | ~6–8% |
| Prime | 661–780 | ~6–8% | ~9–11% |
| Nonprime | 601–660 | ~10–13% | ~13–16% |
| Subprime | 501–600 | ~14–17% | ~18–21% |
| Deep Subprime | 300–500 | ~18%+ | ~21%+ |
Approximate ranges based on Experian State of the Automotive Finance Market data. Actual rates vary by lender and market conditions.
Pro Tip: Get preapproved for an auto loan from a bank or credit union before you visit the dealership. Walking in with a preapproval letter gives you a concrete rate to beat — and shifts negotiating power. If the dealer’s financing office offers a lower rate than your preapproval, take it. If not, you already have financing ready to close.
Loan Term and Total Cost
Loan term is one of the most consequential decisions in auto financing, and it’s where many borrowers underestimate total cost.
Longer terms — 72 or 84 months — lower the monthly payment, which makes expensive vehicles feel accessible. But they dramatically increase total interest paid, and they also create a serious risk of being underwater on the loan — owing more than the car is worth.
A new vehicle depreciates roughly 20% in the first year and about 15% per year after that, according to Carfax data. A 7-year (84-month) loan on a new vehicle almost guarantees a period where the outstanding balance exceeds the car’s market value, typically in years 2–4. If you need to sell or the car is totaled during this period, you’ll owe the lender more than you receive — unless you carry gap insurance.
| Loan Term | Monthly Payment ($30K at 7%) | Total Interest Paid | Underwater Risk Period |
|---|---|---|---|
| 36 months (3 yr) | $927 | $3,231 | Minimal — loan paid off before major depreciation gap |
| 48 months (4 yr) | $718 | $4,439 | Low |
| 60 months (5 yr) | $594 | $5,640 | Moderate in years 2–3 |
| 72 months (6 yr) | $513 | $6,919 | High in years 2–4 |
| 84 months (7 yr) | $452 | $7,227 | Very high in years 2–5 |
Down Payment and Loan-to-Value Ratio
The down payment reduces the loan amount and, with it, your monthly payment and total interest paid. Most financial guidance recommends putting at least 20% down on a new vehicle and 10% on a used vehicle.
The loan-to-value (LTV) ratio is the loan amount divided by the vehicle’s value. A lower LTV indicates a better-collateralized loan and often results in a lower rate offer. Lenders typically have LTV caps — many will not finance a vehicle at more than 100–125% of its value, including fees and taxes.
If a vehicle is financed at 100%+ LTV (zero or low down payment plus financed taxes and fees), it starts underwater on day one.
Where to Get an Auto Loan
The four main lending channels are banks, credit unions, online lenders, and dealer financing (captive and indirect). Each prices risk differently — credit unions typically offer the lowest rates for qualified members, while dealer financing can be unbeatable during manufacturer promotional periods but often carries a rate markup outside of them.
For a direct comparison of bank, credit union, and dealer financing options, see auto loan vs. dealer financing.
Gap Insurance and Auto Loans
Gap insurance (Guaranteed Asset Protection) covers the difference between what you owe on your auto loan and what your insurance company pays if the vehicle is totaled or stolen.
Standard auto insurance pays the current market value of the car — which may be less than your outstanding loan balance if you’re underwater. Without gap coverage, you’d owe the lender the remaining balance out of pocket even after the insurance payout.
Gap coverage makes the most sense when you put less than 20% down, finance for 60 months or longer, or buy a vehicle that depreciates quickly. Dealers offer gap insurance but typically charge significantly more than standalone gap policies available through insurance companies or credit unions.
How to Get an Auto Loan
For a detailed tips guide covering each stage of the process, see 10 tips for getting a vehicle loan. The core steps are four.
- Check your credit and set a total budget. Review all three bureaus and dispute any errors before applying. Calculate the maximum total vehicle price you can afford — not just a monthly payment target. Working backward from a monthly payment is how buyers end up locked into 84-month loans.
- Get preapproved before visiting a dealership. A preapproval from a bank or credit union gives you a concrete rate to beat. Multiple preapproval applications submitted within a 14–45 day window are treated as a single inquiry by FICO scoring models, so shopping rates doesn’t compound the credit impact.
- Negotiate the vehicle price before introducing financing. Agree on the purchase price as a cash buyer first, then discuss financing. Bundling the two gives dealers room to obscure the true cost of each.
- Compare the dealer’s offer to your preapproval, then sign and set up autopay. Take whichever rate is lower. Review the full agreement for add-on products (gap insurance, extended warranties) before signing. Enroll in autopay — most lenders offer a 0.25% rate discount and it protects your payment history.
Auto Loan vs. Personal Loan for Vehicle Purchase
Some buyers consider a personal loan to purchase a vehicle — particularly for older cars that don’t qualify for traditional auto financing. For a full rate and structure comparison, see personal loan vs. auto loan: what’s the difference.
Key takeaways
- An auto loan is a secured installment loan — the vehicle is the collateral, and the lender holds a lien on the title until the loan is paid in full.
- New vehicle loan rates are typically lower than used vehicle rates; subprime borrowers (FICO below 600) often face APRs of 15–21%+ regardless of vehicle type.
- Longer loan terms (72–84 months) reduce monthly payments but dramatically increase total interest paid and create significant risk of being underwater on the loan.
- Getting preapproved before visiting a dealership gives you a rate benchmark and prevents dealers from using financing as a negotiating variable against you.
- Gap insurance covers the difference between your loan balance and insurance payout if the car is totaled — especially important for low-down-payment buyers and long-term loans.
- Multiple auto loan preapproval applications within a 14–45 day window are treated as a single hard inquiry by FICO, so shopping rates doesn’t compound the credit score impact.
Frequently Asked Questions
What credit score do you need for an auto loan?
There is no hard minimum credit score for an auto loan — subprime and deep subprime lenders specifically serve borrowers with scores below 600. However, borrowers with scores below 660 typically face significantly higher APRs (often 12–21%) that substantially increase the total cost of the loan. A score of 720 or higher generally qualifies for prime rates.
How much can you borrow for an auto loan?
Loan amounts depend on the vehicle’s value and your ability to repay. Most lenders will finance up to 100–125% of the vehicle’s value (to cover taxes, fees, and dealer add-ons). There’s no standard maximum — loans for new vehicles can exceed $80,000–$100,000 for higher-end vehicles. The practical limit is determined by your income and DTI ratio.
What is a good interest rate for a car loan?
In the current rate environment, a rate under 6% on a new vehicle is competitive for prime borrowers. Under 8% for used vehicles is reasonable. What constitutes “good” shifts with Federal Reserve rate changes, so compare at least two to three lender offers rather than relying on advertised rates as a benchmark.
Can you refinance an auto loan?
Yes. Auto loan refinancing replaces your existing loan with a new one, ideally at a lower rate or more favorable term. It’s most valuable if your credit score has improved since the original loan, if interest rates have dropped, or if you financed through a dealer at a marked-up rate. Most lenders impose vehicle age and mileage limits for refinancing — typically requiring the car to be under 10 years old and under 125,000 miles.
What happens if you miss an auto loan payment?
Most lenders offer a grace period of 10–15 days before charging a late fee. A payment reported as 30 days past due damages your credit score. After 60–90 days of missed payments, most lenders will begin the repossession process — lender timelines and state laws vary. Unlike unsecured debt, the lender can take the physical asset (the car) without a court judgment in most states.
Is it better to finance a car through a bank or dealer?
It depends on the specific offers available to you at the time of purchase. During manufacturer promotional periods (0% or low-rate offers), dealer/captive financing can be the clear winner. Outside promotions, credit unions and banks frequently offer better rates than indirect dealer financing, where the dealer typically marks up the rate above what the lender actually charges. The safest approach: get preapproved from a bank or credit union, then compare against any dealer financing offer.
What is gap insurance for a car loan?
Gap insurance (Guaranteed Asset Protection) pays the difference between your outstanding loan balance and what your car insurance company pays if the vehicle is totaled or stolen. Without it, if you owe $25,000 on a car your insurer values at $20,000, you’d owe the remaining $5,000 out of pocket. Gap coverage is particularly important for buyers who put less than 20% down or who finance for 60+ months.
Ready to compare auto loan rates? Find lenders and see rates on SuperMoney — compare offers from banks, credit unions, and online lenders before you step into a dealership.
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