Build the out-the-door cost
Ask for a written price that identifies vehicle price, taxes, government fees, dealer fees, and optional products. A monthly-payment quote can hide changes in any of those inputs.
Subtract credits in the right place
Down payment and trade-in reduce the amount that must be financed, but state tax treatment of a trade-in can vary. Use the local taxable-price rule rather than one universal formula.
Compare total loan cost
A longer term can make an expensive vehicle appear affordable per month while increasing interest and the time spent owing more than the vehicle is worth.
Example: financed amount before interest
$30,000 price + $2,100 tax + $900 fees − $4,000 down − $3,000 trade-in = $26,000 financed in a simplified scenario. The monthly payment then depends on APR and term.
What to check before you decide
- Sales-tax and fee rules vary by state and transaction.
- Actual APR, disclosures, add-ons, and lender payment methods control the contract.
Sources behind this guide
These official and primary sources let you verify rules, definitions, and terms that may change.
CFPB — How much car can I afford?↗CFPB — Compare auto loan offers↗