Your deal
Loan balance over time
Your auto financing plan
Your auto financing snapshot
Vehicle price $32,000, with $4,000 down - you're financing $28,000 at 7.9% over 60 months.
• Monthly payment: $566.40 for 5 yrs.
• Total interest over the loan: $5,984 - the true cost of the car is $37,984, not $32,000.
What another $2,000 down would do
• Payment drops to $525.94 ($40.46/month lighter).
• Interest falls by $427 over the loan - every down-payment unit works double: it's not financed AND it never accrues interest.
Before you sign at the dealership
• Get pre-approved by a bank or credit union first - dealer financing negotiates harder when you walk in with a rate to beat.
• Negotiate the vehicle price, never the monthly payment - payment-talk lets the term stretch to hide a bad price.
• Watch the loan-to-value: with only 13% down, early-years depreciation can put you underwater; gap insurance is worth pricing if that number is under 20%.
• Shorter term + same payment beats longer term + extra payment psychologically - you can't skip a contractual payment.
How the auto loan calculator works
The calculator subtracts your down payment and trade-in from the vehicle price to get the financed amount, then amortizes it over your term at your APR - the same math the finance office runs, minus the pressure. It reports the monthly payment, the total interest, and the true cost of the car: sticker price plus every dollar of financing cost. That last number is the one that should drive the negotiation.
The what-if slider shows what an extra chunk of down payment buys: every additional dollar down is a dollar that is never financed and never accrues interest, so it works twice. It also protects you from being underwater - owing more than the car is worth - during the steep early-years depreciation. If your down payment plus trade-in is under 20% of the price, gap insurance is worth pricing.
Sales tax and fees deserve a line item of their own, since they're easy to forget when eyeballing a monthly payment. Most states tax the purchase price (some tax only the difference after a trade-in credit), and dealer fees - documentation, registration, sometimes add-ons - get rolled into the financed amount by default unless you specifically ask for them itemized and paid separately. Both inflate the true cost beyond the sticker price the calculator is built to surface.
Frequently asked questions
- What's a good APR for a car loan?
- It varies with credit score and market rates, but the reliable move is getting pre-approved by a bank or credit union before visiting the dealer. Dealer financing then has a number to beat - and often will.
- Is a longer car loan term bad?
- 72-84 month terms lower the payment but raise total interest and keep you underwater longer. If you need a long term to afford the payment, the honest signal is that the car is too expensive.
- Should I negotiate the price or the monthly payment?
- Always the vehicle price. Payment-based negotiation lets the term quietly stretch to hide a bad price. Settle the price first, then discuss financing separately.
- How much should I put down on a car?
- 20% is the classic guideline - enough to absorb first-year depreciation so you're never underwater. The what-if slider on this page shows exactly what your specific extra down payment saves in interest.
- Is dealer financing ever better than a bank's rate?
- Occasionally - manufacturers sometimes subsidize 0-2% promotional APRs on specific models to move inventory, which can beat any bank. Outside of a real promo rate, dealer financing is usually marked up over what the dealer's lender actually offers, so a pre-approval is still the safer default comparison.