Auto Loan Calculator 2026
Estimate your monthly car payment, total interest, and the true cost of your auto loan.
How Auto Loan Payments Are Calculated
Your monthly payment depends on the amount you borrow (vehicle price plus tax, minus your down payment and trade-in), your APR, and the loan term. A longer term lowers the monthly payment but increases the total interest you pay. A bigger down payment reduces both the payment and the interest, and can help you avoid being "upside down" (owing more than the car is worth).
Monthly Payment by Term — $30,000 Loan
| APR | 48 months | 60 months | 72 months |
|---|---|---|---|
| 4% | $677/mo | $552/mo | $469/mo |
| 6% | $705/mo | $580/mo | $497/mo |
| 8% | $732/mo | $608/mo | $526/mo |
| 10% | $761/mo | $637/mo | $556/mo |
$30,000 financed, excluding tax and fees.
The True Cost of a Car Loan
The sticker price is only part of the story. On a $30,000 loan at 8% APR, choosing a 72-month term instead of 48 months drops the monthly payment by around $200 — but you pay roughly $2,700 more in total interest and spend two extra years in debt. Add sales tax, registration, insurance, fuel and maintenance, and the real cost of ownership is far higher than the monthly payment suggests. Always look at the total repaid, not just what fits your monthly budget.
Tips to Pay Less for Your Car
- Get pre-approved first. Walking in with a bank or credit-union rate turns the dealer's financing into a negotiation you can win.
- Negotiate the price, not the payment. Dealers can hit any monthly payment by stretching the term — agree the out-the-door price first.
- Put more down. A larger down payment cuts interest and protects you from negative equity if the car depreciates faster than you repay.
- Keep the term short. 48–60 months is a sensible ceiling; 72–84-month loans are where buyers most often end up "underwater".
Frequently Asked Questions
What credit score do I need for a good car loan rate?
Borrowers with scores above 720 usually get the lowest APRs. Below 660, rates rise sharply, so improving your score before applying — or getting pre-approved by a bank or credit union — can save thousands.
Is a longer loan term a good idea?
A 72- or 84-month term lowers the monthly payment but costs much more interest and keeps you in negative equity longer. Most experts suggest keeping car loans to 60 months or less.
How much should I put down on a car?
A common guideline is 20% down on a new car and 10% on a used one. A larger down payment lowers your payment, interest, and the risk of owing more than the car is worth.
Should I finance through the dealer or a bank?
Get pre-approved by a bank or credit union first, then let the dealer try to beat it. Dealer financing can be convenient but is not always the cheapest option.
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⚠️ Disclaimer: Results are estimates only and do not constitute financial, tax, or legal advice. Tax laws change frequently — always verify with official sources (IRS, HMRC) and consult a qualified professional before making decisions.
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