Car Loan Early Payoff Calculator
The sticker price is never the loan. Between your down payment, trade in, sales tax and the APR your credit score earns you, the amount you actually finance, and the monthly payment it produces, can look very different from the number on the windshield. This car loan calculator walks through the whole deal the way a lender does, then works as a car loan early payoff calculator, showing how extra payments cut months off the term and how much interest you save. It subtracts your down payment and trade in, adds sales tax on the taxable amount, then amortizes the rest over your chosen term at your APR. You get the monthly payment plus the two numbers dealers rarely volunteer, total interest and total cost of the loan. Use it before you walk into the dealership, not after: knowing your payment at 60 versus 72 versus 84 months turns a salesperson's "what monthly payment works for you?" from a trap into a question you can already answer. Shows your monthly payment, total interest and full amortization schedule for any loan amount, APR and term, including trade in and down payment.
Last updated: October 22, 2026
Your result
The formula
Amount financed = vehicle price − down payment − trade-in + sales taxMonthly rate r = APR ÷ 100 ÷ 12Monthly payment M = P × r(1+r)^n ÷ ((1+r)^n − 1), where P is the amount financed and n is the term in monthsTotal interest = (M × n) − PTotal cost = down payment + (M × n)
A worked example
A $28,000 car with $3,000 down, a $2,000 trade in, 6.5% APR, a 60 month term and 7% sales tax: the amount financed is $24,820, the monthly payment is $485.63, total interest comes to $4,317.91 and the total of payments is $29,137.91.
More about the Car Loan Calculator
How a car payment is actually calculated
Car loans amortize: every monthly payment first covers that month's interest, and whatever is left shrinks the balance. The formula lenders use is M = P × r(1+r)^n ÷ ((1+r)^n − 1), where P is the amount financed, r is the monthly rate (APR ÷ 12) and n is the number of months. Early payments are mostly interest; late payments are mostly principal.
And the APR matters more than most buyers expect. Take a $25,000 loan over 60 months: at 4% APR you pay about $2,615 in total interest; at 9% it's about $6,130. Same car, same term, more than double the interest. Small rate differences quietly compound into thousands of dollars.
The price is not the loan: down payment, trade in and tax
The amount financed is the real starting point: vehicle price, minus your down payment, minus your trade-in value, plus sales tax. This calculator taxes the price after trade-in (price − trade-in), which matches how most US states do it, your trade-in usually reduces the taxable amount.
A bigger down payment does two jobs at once: it shrinks the financed amount and it protects you from going underwater (owing more than the car is worth) as the car depreciates. The classic guidance is 20% down on a new car and 10% on used, not everyone can hit it, but every extra thousand helps.
APR, interest rate and your credit score
Your credit score is the single biggest lever on your APR. Borrowers with excellent credit routinely qualify for rates several points below what subprime borrowers are offered, on a five year loan that gap can mean thousands in extra interest for the identical car.
Get pre approved by your bank or credit union before visiting the dealer. A pre approval turns the financing conversation from \"trust our rate\" into a number you can compare line by line, and dealers can sometimes beat it, which is a win either way.
The term trade off: 36 vs 60 vs 84 months
A longer term always lowers the monthly payment and always raises the total interest, there is no free lunch. Stretching a $25,000 loan at 6% from 48 to 84 months drops the payment by roughly $160 a month but adds about $2,700 in interest.
Long terms carry a second risk: cars depreciate fast in the first years, so an 84 month loan can leave you owing more than the car is worth for years. If you need 84 months to afford the payment, that is the calculator telling you the car is too expensive.
How much car can you actually afford
Two rules of thumb dominate car buying advice. The 20/4/10 rule: 20% down, a term no longer than 4 years, and total car costs under 10% of gross income. The simpler 15% rule: keep the monthly payment under 15% of your monthly take home pay.
Run both against your numbers here. Enter the price you are considering, your real APR (not the advertised teaser rate), and see whether the payment fits, then try the shorter term to see what the car truly costs.
Refinancing: a second chance at a better rate
If your credit score has improved since you bought the car, or market rates have fallen, refinancing can cut your APR and your payment, sometimes dramatically. The math is the same amortization formula applied to your remaining balance over a new term.
Watch the term when you refinance: restarting the clock at 60 months on a three year old car means paying interest for eight years total. Match or shorten the remaining term and the refinance is pure savings.
Car loans with bad credit: what changes
Below prime borrowers face two penalties: higher rates and shorter maximum terms. Where a prime borrower might see single digit APRs over 72 months, a subprime borrower often sees much higher APRs capped at 60 months, the monthly payment jumps on both axes at once.
The moves that help most: a bigger down payment (it cuts the amount financed AND the lender's risk), a shorter term (less total interest, though a higher monthly), and getting pre approved before the dealer, dealer arranged subprime loans carry the biggest markups.
Run the calculator at a few rate scenarios before you shop. The lifetime interest gap between a prime and subprime rate on the same car is usually several thousand. That gap is the real cost of buying now versus waiting six months to lift your score.
How the loan side works: amortization
Every loan payment is split between interest and principal. Early on, most of it is interest; over time the balance tilts toward principal, and the final payment leaves you owning the car outright. The amount you finance is the price minus your down payment (and any trade in), and the APR decides how much interest piles on top over the term you choose.
Stretching a loan to 72 or 84 months shrinks the monthly payment but inflates the total interest, sometimes by thousands. That is why this calculator shows the total loan cost, not just the payment: a $618 payment for 60 months and a $540 payment for 72 months look similar at the dealership and very different in your bank account.
To see the month by month breakdown of any loan, full amortization schedule, total interest and payoff date, our Car Loan Calculator goes deeper on the borrowing side alone.
How the lease side works: depreciation plus a rent charge
A lease payment has two parts. The depreciation fee covers the value the car is expected to lose: (capitalized cost − residual value) ÷ term months. The capitalized cost is the negotiated price plus any fees rolled in; the residual value is the lender's forecast of what the car will be worth at turn-in.
The rent charge is the lease's interest, calculated from the money factor: (capitalized cost + residual value) × money factor. Dealers quote the money factor as a small decimal like 0.00125 because it looks harmless, multiply it by 2400 to get the equivalent APR (0.00125 × 2400 = 3%), and suddenly it compares directly with any loan rate.
Then come the extras many quotes bury: an acquisition fee at signing, a disposition fee at turn in if you walk away, and excess mileage charges if you blow past the allowance. This calculator rolls the due at signing amount and end of lease fees into the lease total so the comparison stays honest.
The worked example, step by step
Take a $35,000 car. Loan side: $3,000 down leaves $32,000 financed at 6% APR over 60 months. The amortization formula gives about $618.65/month; total loan cost = $3,000 + $618.65 × 60 ≈ $40,119.
Lease side: $2,000 due at signing, $400/month for 36 months, $350 disposition fee. Total lease cost = $2,000 + $400 × 36 + $350 = $16,750.
Over the 36 month lease term the lease is clearly cheaper out of pocket, but at month 37 the lease ends and you need another car, while the loan buyer keeps driving toward ownership. Annualized, the loan runs about $7,424/year and the lease about $5,583/year, and the breakeven month tells you when the cumulative spending lines cross.
Reading the winner and the breakeven month
The winner is the lower total cost over the terms you entered, with the dollar saving shown. But totals alone can mislead when the terms differ, a 60 month loan total versus a 36 month lease total is not apples to apples, because after month 36 the lessee must sign a new lease or buy.
The breakeven month answers the sharper question: when does the total cash spent on the loan equal the total cash spent on the lease? Before that month, the option with the smaller upfront cost is ahead; after it, the option with the smaller monthly payment pulls ahead. If the lines never cross within ten years, the calculator says so plainly.
The one thing no number captures: leasing is a permanent car payment. A bought car can be driven payment free for years after the loan ends, the cheapest car to run is almost always the one you already own.
Five lease traps that flip the answer
A marked up money factor: dealers can inflate it above the lender's base rate. Convert it to APR (× 2400) and compare with current auto loan rates before signing.
An inflated capitalized cost: fees rolled into the lease quietly raise both the depreciation and rent charges. Negotiate the selling price first, then discuss the lease, never negotiate on the monthly payment alone.
A low residual value: it directly raises the depreciation you pay. And the mileage allowance: most leases include 10,000 to 12,000 miles a year, with steep per mile charges beyond it. High mileage drivers should almost always buy.
A big amount due at signing: it lowers the monthly figure but that cash is at risk, if the car is totaled early, upfront lease money is generally not recoverable. Keep drive off costs small and judge the total, not the payment.
Once the financing question is settled, the running costs are next. Our Monthly Fuel Cost Calculator turns your commute into a monthly budget line, and the rest of our Car & Auto calculators collection covers the other ownership expenses dealers never mention.
When leasing actually wins
Leasing is not always the expensive choice. Business drivers who can deduct lease payments, people who genuinely want a new car every three years with warranty coverage throughout, and low mileage drivers who stay well under the allowance can come out ahead, especially when manufacturers subsidize the money factor or inflate the residual to move inventory.
Leases also bundle gap insurance in most cases, and they cap your exposure to unexpected depreciation, if the model tanks in value, you hand back the keys instead of eating the loss. Run the numbers above with your actual quote; when the subsidized lease beats the loan, take the win.
How to use the Car Loan Calculator
- Enter the vehicle price, your down payment and any trade in value.
- Set the APR and pick the loan term, 36, 48, 60, 72 or 84 months.
- Add your sales tax rate so the financed amount is realistic.
- Press Calculate to see the monthly payment, total interest and total cost.
Car loan or lease, questions
What is the breakeven month in this calculator?
The month when the total cash spent on the loan equals what the lease would have cost. Before it, the option with the smaller upfront cost is ahead; after it, the option with the smaller monthly payment pulls ahead. If the lines never cross within 10 years, the calculator says so, one choice simply stays cheaper.
Does leasing build any equity?
No, that is the core trade off. Lease payments cover depreciation and the rent charge, so at the end you return the car with nothing to show for the payments (unless you buy it at residual value). Loan payments build equity every month, and after the final payment you own an asset you can drive for free or sell.
How does mileage affect the lease vs buy decision?
Leases include an annual mileage allowance, often 10,000 to 12,000 miles, and charge per extra mile at turn in, which can erase the lease's savings fast. High mileage drivers almost always do better buying, since there is no per mile penalty on a loan. Estimate your honest yearly mileage before signing.
What happens at the end of a car lease?
You either return the car and settle any end of lease charges for excess mileage or wear, or buy it for the residual value written into your contract. Some leases also charge a disposition fee when the car is handed back.
Should I lease or buy my next car?
Lease if you want lower monthly payments, a new car every 2 to 3 years, and you drive predictable low mileage, but you'll never own anything and mileage penalties are brutal. Buy if you keep cars long term: after the loan ends, you get years of payment free driving, which is where the real savings live. The cheapest car is almost always the reliable one you already own.
Is a lease buyout worth it at the end of my lease?
A buyout is worth it when the buyout price is below the car's current market value, or when you would face large mileage or wear penalties by returning it. Compare the buyout price against similar used car listings first.
What is a lease money factor, and how do I convert it to an APR?
The money factor is the lease's finance charge expressed as a tiny decimal, like 0.00250. Multiply it by 2,400 to get the equivalent APR, 0.00250 × 2,400 = 6.0% APR. Always convert before comparing a lease quote against a loan, since dealers sometimes quote the money factor to make the rate look low.
Frequently asked questions
How is my car loan monthly payment calculated?
With the standard amortization formula lenders all use: M = P × r(1+r)^n ÷ ((1+r)^n − 1). P is the amount financed (price minus down payment minus trade-in plus sales tax), r is your monthly rate (APR ÷ 12), and n is the term in months. Every payment clears that month's interest first, whatever's left chips away at the balance.
How much car can I afford?
A common rule: keep the monthly payment under 15% of your monthly take home pay, put 20% down on a new car (10% on used), and keep the term at 48 months or less. Enter the price you are considering here and check the payment against your budget before you negotiate.
How does a trade in affect my car loan?
Your trade in value reduces the amount financed dollar for dollar, which lowers both the payment and the total interest. In most US states it also reduces the taxable amount, so you pay less sales tax too. Enter it above to see the combined effect.
Are taxes and fees included in the calculation?
Sales tax is included, enter your state rate and it is added to the financed amount (applied to price minus trade in, as most states do). Dealer documentation fees and registration vary too much to estimate accurately, so add those to the vehicle price if you want them financed.
What happens if I pay extra each month?
Extra payments go straight to principal, shortening the loan and cutting total interest, even $50 extra a month moves the needle visibly. Two checks first: make sure there's no prepayment penalty (most auto loans don't have one), and confirm with the lender that overpayments actually go to principal.
Why should I avoid 72 or 84 month car loans?
Longer terms lower the monthly payment but charge more interest and keep you "underwater" (owing more than the car's worth) for years. A $35,000 loan at 7.5% for 60 months costs about $7,056 in interest; stretching it raises that substantially.
Should I refinance my car loan?
Refinancing makes sense when you can get a rate at least 1 to 2 points lower or shorten the term without straining your budget. Compare the remaining interest on your current loan against the new loan's total interest, including any fees.
Should I pay off my car loan early?
Yes if the rate is high (above roughly 6 to 7%) or you want the title free and possibly lower insurance costs; it's less urgent for 0 to 3% promotional rates where investing the extra cash may earn more. Always check for prepayment penalties before sending a lump sum.
How much car loan can I get based on my salary?
Most banks cap your total debt payments at 30 to 40% of your net monthly income. On a $2,000 net monthly salary, that leaves roughly $600, $800 a month for all debts including the car. Use the calculator with your salary, existing debts, and term to see your maximum loan.
What credit score is needed for a good car loan rate?
Generally 670+ opens prime ish rates, with the best terms around 720+. Below 600 you are in deep subprime territory. But score is not everything, income stability and down payment size move offers too.