
Auto Loan Calculator: Estimate Your Monthly Car Payment
How to Use This Auto Loan Calculator
What Actually Moves Your Car Payment
Key Factors That Affect Your Auto Loan Payment
The Negative Equity Problem
Common Mistakes That Inflate a Car Payment
2026 Auto Loan Rates by Credit Tier
Frequently Asked Questions About Auto Loans
Talk to a Counselor About Your Retirement Plan
Our auto loan calculator works in either direction. Enter a purchase price, loan term, and interest rate, and it solves for your monthly payment. Or enter the payment you can afford, and it solves for the purchase price that gets you there. Either way, it also factors in a trade-in, a down payment, sales tax, and dealer fees, not just the sticker price and a flat rate.
Credit.org is a nonprofit financial counseling agency, not a lender or a dealership, so this calculator has no reason to steer your numbers toward a bigger loan or a longer term. It's a planning tool, and an honest one: the answer it gives you is only as good as the price, rate, and term you put into it.
This page covers how to use every field in the calculator, including the ones people tend to skip, what actually moves a monthly payment, current average auto loan rates and terms for 2026, and the negative equity problem that's quietly reshaping how car loans get structured right now.
The calculator has three sections: car financing, down payment, and taxes and fees. The last two are collapsed by default, which is exactly where most estimates go wrong.
Car Financing
1. Calculate for. Choose “Payment” to solve for your monthly payment from a purchase price, or “Price” to solve for the purchase price a payment you already have in mind can support.
2. Total purchase price (before tax). The vehicle's price plus any add-ons and destination charges, before sales tax. Tax gets added separately in the taxes and fees section.
3. Payments are made. How often you'll pay. Monthly is the default.
4. Term in months. The length of the loan, from 12 to 120 months. The default is 84, which is worth a second look before you accept it (more on why below).
5. Interest rate. Your loan's APR. Check the current average rates by credit tier further down this page before you guess at a number.
Down PaymentCollapsed by default, which makes it easy to leave at a placeholder instead of your own numbers. Three fields:
- Rebates and cash down: any manufacturer rebate plus cash you're putting down directly.
- Trade allowance: what the dealer is offering for your trade-in.
- Amount owed on trade: your current loan balance on that trade-in, if any.
If the amount you owe is higher than the trade allowance, that gap is negative equity, and the calculator rolls it straight into your new loan. See the section below on what that does to a payment.
Taxes and Fees
Also collapsed, and also not optional in real life:
- Fees (non-taxable): title and registration fees, which aren't subject to sales tax.
- Fees (taxable): dealer-added fees, like documentation fees in most states, which are.
- Sales tax rate: your state and local rate. This is the field most likely to get left at the default, and it can move the total by hundreds of dollars.
There's also a checkbox for states that don't allow a sales tax deduction on trade-in value. A handful of states tax the full purchase price even when you trade in a car, instead of taxing only the difference. Check your state's rule before leaving this unchecked.
Four things determine the number: the price you're financing, your rate, your term, and how much you put down or bring in trade equity. Buyers tend to fixate on price and treat the other three as fixed, but term and rate can swing the total cost by thousands of dollars the sticker price never hints at.
A concrete example, using the calculator's own default loan of $18,440 at 9% APR: financed over 60 months, the payment is $382.78 and total interest comes to $4,527. Stretch the same loan to 84 months, the calculator's default term, and the payment drops to $296.68, but total interest climbs to $6,481. The monthly payment is $86 lower. The interest bill is just under $2,000 higher, for the exact same car.
That's the trade-off worth running through the calculator more than once: a smaller number today against a larger one over the life of the loan.
Your Loan Term
The average new-vehicle loan term reached 70.3 months in the first quarter of 2026, and terms keep stretching as vehicle prices stay high. A longer term lowers the payment on paper, but it also means paying interest longer and, especially in the first year or two, owing more than the car is worth as it depreciates. Match the term to how long you actually plan to keep the car, not to whatever number gets the payment where you want it.
Your Interest Rate
Rate depends heavily on credit tier, and the gap between tiers is large. In the first quarter of 2026, average new-car APRs ran from 4.55% for super-prime borrowers (credit scores 781 and up) to 16.01% for deep-subprime borrowers (below 501). Used-car rates ran higher across every tier, from 6.30% up to 21.77%. See the full table below before accepting a dealer's first offer.
Your Down Payment and Trade-In Equity
Cash down and trade equity both reduce what you're financing, which lowers your payment and your total interest at the same time, unlike stretching the term. A trade-in only helps if you actually have equity in it. If you owe more than it's worth, read the negative equity section below before touching that trade allowance field.
Sales Tax and Fees
Rates vary by state and, in some places, by county or city, and a handful of states don't let you deduct trade-in value from the taxable price. Dealer documentation fees are typically taxable; title and registration fees typically aren't. Both categories are easy to underestimate, and both already have their own fields in the calculator above.
If your projection shows a gap, contributing more is often the first lever to pull, and the IRS raised contribution limits for 2026:
- 401(k), 403(b), most 457 plans, and the federal TSP: employee deferrals rise to $24,500, up from $23,500 in 2025.
- Catch-up contributions (age 50+): $8,000, up from $7,500, for a combined limit of $32,500.
- Enhanced catch-up (ages 60-63, under SECURE 2.0): $11,250, for a combined limit of $35,750.
- Traditional and Roth IRAs: the contribution limit rises to $7,500, up from $7,000.
- IRA catch-up contributions (age 50+): $1,100, up from $1,000, for a combined limit of $8,600.
Traditional IRA deductibility and Roth IRA eligibility both phase out at higher incomes. For 2026, a single filer covered by a workplace plan loses the traditional IRA deduction between $81,000 and $91,000 of income, and Roth eligibility phases out between $153,000 and $168,000. Married couples filing jointly should check the current thresholds directly, since they depend on which spouse is covered by a workplace plan.
If you're 50 or older, the catch-up room is worth entering into the calculator's “percent of income to save” field as an actual dollar target rather than rounding down. The gap between the standard and catch-up limits is often the difference between a plan that works and one that's close.
- Extending the term to hit a target payment without checking total interest, the single most common way a car ends up costing thousands more than the sticker price suggested.
- Skipping the sales tax and fees fields, which understates the real payment by leaving out costs that are rarely optional.
- Rolling negative equity into a new loan without checking the amount first, so the new loan starts out bigger than the new car.
- Financing at the dealership without checking your own credit tier's average rate first, leaving no way to know whether the offered rate is competitive.
- Treating the calculator's default 9% rate or 84-month term as a target instead of a placeholder to replace with real numbers.
Average APRs from Experian's State of the Automotive Finance Market report, first quarter of 2026:
- Super prime (781-850): 4.55% new / 6.30% used.
- Prime (661-780): 6.23% new / 8.77% used.
- Near prime (601-660): 9.67% new / 14.03% used.
- Subprime (501-600): 13.44% new / 19.42% used.
- Deep subprime (300-500): 16.01% new / 21.77% used.
The average new-car loan in that quarter was $43,925 with a $770 monthly payment; the average used-car loan was $27,070 with a $531 payment. If your quoted rate lands well above your tier's average, that's worth questioning or shopping against a second lender before you sign.
Should I calculate payment or price?
Use “Payment” if you know roughly what price range you're shopping in and want to see the resulting monthly cost. Use “Price” if you know what payment fits your budget and want to work backward to a purchase price that hits it. Both use the same term, rate, down payment, and tax inputs.
What loan term should I choose?
Shorter, if your budget allows it. A 60-month loan carries less total interest than the same loan at 72 or 84 months, even though the monthly payment is higher. Run all three terms through the calculator and compare total interest, not just the payment, before deciding.
How much should I put down?
Enough to avoid starting the loan underwater. A car loses value fastest in its first year, and a small or nonexistent down payment on a long loan term is the most common way buyers end up owing more than the car is worth before that first year is out.
What if I owe more on my trade-in than it's worth?
Enter the real numbers in “Trade allowance” and “Amount owed on trade” and let the calculator show the actual rollover amount before you commit to it. Paying down some of the difference first, or keeping your current car another year, are both worth comparing against rolling the whole gap into a new loan.
Does the calculator include sales tax?
Yes, once you expand the taxes and fees section and enter your state's rate. Leaving it at the default doesn't remove the cost. It just leaves your estimate wrong.
Is a longer loan term ever the right call?
Sometimes, if the alternative is a payment you can't realistically afford, but treat it as a last resort rather than a default. Compare total interest at 60, 72, and 84 months side by side before choosing, since the right answer isn't the same for every buyer.
Can Credit.org help me find a better rate?
Credit.org doesn't originate loans, so it can't offer you one. What a certified counselor can do is review your credit report, your budget, and your current debt, and help you understand what rate you're likely to qualify for, and whether financing a car right now is the right move at all
A car loan is one of the larger debts most people take on, and the terms offered at the dealership are often the first offer, not the best one. A certified Credit.org counselor can review your budget and credit before you shop, not after you've already signed. Schedule your free appointment or call 800-431-8157. Credit.org doesn't lend money and isn't affiliated with any dealership or lender.
Related reading: Buy vs. Lease Calculator | Loan Pre-Qualification Calculator | Budgeting Calculator
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