Compare ways to pay for a car in the US
Start with the complete price and the same car and time period. Then compare cash, bank or credit union financing, dealer financing, and leasing using written offers rather than headline monthly payments.
1. Get the full purchase price
Ask for the out-the-door price: vehicle price, sales tax, title, registration and dealer charges. Check which add-ons are optional. A trade-in has a value and might also have an unpaid balance; write down both numbers. The calculator accepts your quoted tax total because the applicable rules and tax treatment differ by location and transaction.
2. Compare financing on the same terms
Ask a bank or credit union for a preapproval and ask the dealer for its offer. Compare the amount financed, cash down, interest rate used to calculate payments, APR, loan length, financed fees, rebates, monthly payment and remaining balance. APR can include loan charges, so it is not always the same number as the contract interest rate. A promotional dealer rate may require giving up a cash rebate.
A 72-month loan may look affordable each month while leaving substantial debt after four years. Our estimated cost at that point includes the remaining loan balance once; it is not the sum of every future installment.
3. Treat a lease as an end decision
Record the total due at signing, the later monthly payments, mileage allowance, anticipated return charges and any buyout quote. Compare a returned lease only with options assessed to the same end date. A lower monthly payment does not tell you what the full arrangement costs or whether you own a car at the end.
4. Separate cash paid from cost
Total money paid is what leaves your account during the comparison. Estimated cost also accounts for money still owed and the car value retained. For example, $35,000 paid plus $8,000 debt minus a $20,000 car value gives $23,000 estimated cost. The future car value is your assumption and is uncertain.
If you enter an optional after-tax savings return, the calculator also expresses all payments and the end value or debt in today’s dollars. Keep this separate from the undiscounted estimated-cost figure; the savings return is an assumption, not a guaranteed outcome.
5. Make the result yours
Use the priority cards to say whether total cost, cash today or monthly payments matter most. Optional firm limits exclude methods that exceed your comfort amount from the recommendation, but the methods remain visible. The fit score is a transparent comparison of entered costs and limits, not a credit or affordability decision.
Questions to take to a seller
- What is the written out-the-door price before discussing a payment target?
- How much is financed, what is the actual monthly payment and how long is the loan?
- Can I have both the promotional rate and the rebate?
- What is the trade-in value, and how much remains on its current loan?
- What will I owe or own at my planned end date?
- For a lease, what happens if I exceed mileage or return a damaged vehicle?
Further reading: FTC financing or leasing guidance and CFPB auto loan resources.
Compare specific choices
- Cash versus a car loan
- Bank versus dealer financing
- Auto loan versus lease
- How to compare an out-the-door price
Reviewed September 2026 · Independent educational comparison