Should I take a 60-month or 72-month car loan?
60 months is the better default for most buyers. The 72-month payment is typically only $50–$100 lower, but you pay around $1,500–$2,500 more in interest and you're more likely to be upside-down on the loan if you need to sell or trade the car. Choose 72 (or longer) only if 60 is genuinely unaffordable — and consider buying a cheaper car instead.
Does my credit score really matter for an auto loan?
A lot. The Consumer Financial Protection Bureau and Federal Reserve data show APR spreads of 5–10 percentage points between top-tier (740+) and subprime (below 620) borrowers on the same vehicle. On a $30,000 loan over 60 months, that's the difference between roughly $4,500 and $9,500+ in total interest. Check your score before shopping and, if it's below 700, consider improving it before financing.
Is dealer financing better than my bank or credit union?
Sometimes. Manufacturer captive lenders occasionally offer promotional 0% or low-APR financing on specific models, which can beat any bank rate — but they often require forgoing a cash rebate. Outside those promotions, credit unions usually offer the lowest APRs. The right move is to get pre-approved by your bank or credit union first, then let the dealer try to beat it.
What is gap insurance and do I need it?
Gap insurance covers the difference between what you owe on your loan and what your insurer pays out if the car is totaled or stolen. It's most useful if you put less than 20% down, finance for 60+ months, or roll negative equity from a trade-in into the new loan — situations where you're likely to be underwater. If you put a large down payment on a slow-depreciating vehicle, you can usually skip it.
Should I put more money down?
Generally yes, up to about 20%. A larger down payment lowers the loan amount, reduces total interest, and helps you stay right-side-up on the loan as the car depreciates (especially in the first year, when new cars lose 15–25% of their value). Beyond 20%, the marginal interest savings shrink — that extra cash often does more good as an emergency fund or higher-yield investment.
Can I negotiate the APR my dealer quotes?
Yes. Dealers often mark up the rate the lender approves you for and keep the spread as profit. If you arrive with a pre-approval from your bank or credit union, the dealer either has to match or beat it. Also ask about automatic-payment discounts (often 0.25%) and loyalty discounts if you already bank with them.
How is sales tax handled in the loan?
In most U.S. states, sales tax is calculated on the full vehicle price (sometimes reduced by the trade-in value, depending on the state). Dealers commonly roll that tax into the financed amount so you don't pay it at signing — that means the loan amount is larger and you pay interest on the tax, too. Enter your state's rate in the Sales Tax (%) field so the calculator reflects this.
Is leasing cheaper than financing?
Monthly payments are usually lower on a lease, but you don't own anything at the end. Over a typical 10-year ownership window, financing and paying off a car is almost always cheaper than leasing back-to-back. Leasing makes financial sense mainly if you want a new car every 2–3 years, drive fewer miles than your lease allows, and value lower upfront and maintenance costs.
Should I refinance my car loan?
Refinancing can save money if interest rates have dropped, your credit score has improved by 50+ points since you bought the car, or you accepted dealer financing at a marked-up rate. The math works best in the first 1–2 years of the loan, when most of the payment still goes to interest. Watch for prepayment penalties on the existing loan and any application fees on the new one.
What is negative equity (being 'underwater')?
You're underwater when you owe more on the car than it's worth. Long loan terms, small down payments, and fast depreciation all make this more likely. If you sell or total an underwater car, you have to make up the difference out of pocket (or roll it into your next loan). The calculator's loan-amount field helps you visualize the starting balance you need to pay down before reaching positive equity.
Does the calculator account for documentation and dealer fees?
Not as a separate field. The simplest workaround is to add expected doc and dealer fees to the Vehicle Price input, since they're typically financed alongside the car. Dealer fees can range from $100 to $700+ depending on the state, so it's worth asking for a full out-the-door price quote before plugging in numbers.
Why is the payoff date roughly N months from today?
The calculator assumes you start the loan today and make the scheduled payment every month with no missed payments, refinances, or rate changes. The payoff date is simply today's date plus the loan term in months. Use it as a planning estimate; for an exact payoff date, your lender's amortization schedule is the source of truth.
