Auto Loan Calculator
Calculate your monthly car payment and see the true total cost including interest. Add trade-in value and sales tax for an accurate picture.
Enter vehicle details and click Calculate
Calculate your monthly car payment and see the true total cost including interest. Add trade-in value and sales tax for an accurate picture.
A vehicle purchase is typically the second largest financial transaction in a household's life, yet most people focus on the sticker price or monthly payment without fully calculating the total cost of ownership including financing. The Auto Loan Calculator on Digital.Finance breaks down monthly payments, total interest paid over the loan term, and the impact of down payment, trade-in value, sales tax, and interest rate on what you will actually pay for the vehicle. Understanding these numbers before stepping onto a dealership lot puts you in a fundamentally stronger negotiating position and helps you avoid common financing mistakes that cost thousands of dollars.
The calculator takes the vehicle price, down payment, trade-in value, applicable sales tax rate, loan term, and interest rate to compute the financed amount and resulting monthly payment. Sales tax is calculated on the purchase price in most states, not the financed amount, so it is added to the total cost of the vehicle before calculating the loan. If you are purchasing a $32,000 vehicle with a $4,000 down payment and a $6,000 trade-in value in a state with 6% sales tax, the purchase price including tax is $33,920, the financed amount after down payment and trade-in is $23,920, and a 60-month loan at 6.9% APR produces a monthly payment of approximately $472. Over 60 months, you would pay $28,320 in total, meaning the interest cost is $4,400.
Auto loan terms have lengthened significantly over the past decade, with 72- and 84-month loans now commonly offered by dealerships and financial institutions. While these longer terms reduce monthly payments, they dramatically increase total interest paid and create the serious risk of being underwater on the vehicle — owing more than it is worth — for extended periods. A new vehicle typically depreciates approximately 15% to 20% in the first year and roughly 50% over five years. On a $35,000 vehicle with a 7% APR over 84 months, monthly payments are about $528 but total interest exceeds $9,300, and the borrower is almost certainly upside-down on the loan for the first three to four years. If the vehicle is totaled or needs to be sold during that period, the owner may owe several thousand dollars out of pocket even after the insurance settlement.
A larger down payment reduces the financed amount, monthly payment, total interest, and the period during which you are underwater on the loan. Financial guidance commonly suggests putting down at least 20% on a new vehicle purchase. On a $32,000 vehicle, 20% down is $6,400 — reducing the financed amount and making it far less likely that depreciation outpaces your loan balance in the early years. The trade-in value of your current vehicle can effectively substitute for or supplement a cash down payment. Before accepting a dealership's trade-in offer, get independent appraisals from competing dealers and online services to ensure you are receiving fair market value, as trade-in values are a common area where dealer negotiations add hidden cost.
Interest rates on used vehicle loans are typically higher than on new vehicle loans, often by 1% to 2% or more, because used vehicles represent more uncertain collateral. However, the depreciation advantage of buying used can more than compensate for the higher rate. A two- to three-year-old vehicle in good condition may have already absorbed 30% to 40% of its depreciation while retaining most of its useful life. Certified pre-owned programs through manufacturers offer factory-backed warranties and sometimes competitive financing that bridges the gap. When comparing new versus used, the loan comparison calculator can model both options with their respective prices, rates, and terms to show which truly costs less over your intended ownership period.
The auto loan payment is only one component of vehicle cost. Insurance premiums, registration fees, fuel costs, routine maintenance, and potential repair costs all factor into the real cost of ownership. Higher-end vehicles carry higher insurance premiums, and some brands or models have significantly higher maintenance costs than others. Estimated insurance costs should be verified with your insurer before purchasing, not after. Fuel costs depend on the vehicle's fuel efficiency rating and your annual mileage — at 15,000 miles per year, a vehicle averaging 25 MPG costs roughly $1,800 annually in fuel at $3 per gallon, while a vehicle averaging 18 MPG costs approximately $2,500. Electric vehicle operating costs can differ substantially from both, with lower per-mile energy costs but specific charging infrastructure considerations.
Auto lenders typically tier rates by credit score range. Borrowers with scores above 750 generally qualify for the most competitive rates, often within 1% to 2% of the prime rate. Scores between 680 and 749 receive good but not exceptional rates. Scores between 620 and 679 typically carry rates 3 to 5 percentage points higher than top-tier borrowers. Subprime loans for scores below 620 can carry rates of 15% to 25% or more. On a $25,000 loan over 60 months, the difference between a 4% rate and a 15% rate is approximately $190 per month and over $11,000 in total interest.
Leasing typically offers lower monthly payments and the ability to drive a newer vehicle more frequently, but you build no equity, face mileage penalties above the contracted allowance (often 10,000 to 15,000 miles per year), and pay for any wear and damage at lease end. Buying a vehicle and maintaining it after payoff produces the lowest long-term cost per mile because the payment disappears while the vehicle continues to provide transportation value. Leasing makes financial sense primarily for business users who can deduct the expense, or for people who genuinely change vehicles frequently and place high value on always driving something under warranty.
Yes. Dealers often mark up the interest rate above what the lending institution actually requires — this markup is called the dealer reserve and is a common source of dealer profit. Getting pre-approved through your bank or credit union before negotiating gives you a firm baseline rate. When the dealer presents their financing offer, you can either accept it if it beats your pre-approval, or use your pre-approval as the final offer. Never reveal your pre-approval rate before receiving the dealer's best offer, as the dealer may otherwise simply match it rather than compete below it.