Car loans: how to compare offers and avoid costly extras

Loans and debt · 3 min read · Updated 1 November 2026

In short: compare car loans on the APR and the total cost, not only the monthly payment. Getting pre-approved by a bank or credit union before you visit a dealer gives you a rate to compare. Longer loans have lower payments but cost more in interest. Extras such as extended warranties and GAP insurance are usually optional.

Where the loan can come from

Bank or credit union: you apply directly and can get pre-approved before shopping.
Dealer financing: the dealer arranges the loan with a lender. The dealer may add to the rate the lender offered, and that markup can sometimes be negotiated.

You don't have to finance through the dealer. A pre-approval lets you compare the dealer's offer with one you already have.

Loan length changes the total cost

Borrowing $20,000 at 7% APR:

Monthly payment and total interest for 20,000 dollars at 7 percent
Length	Monthly payment	Total interest
3 years	$617.54	$2,232
4 years	$478.92	$2,988
5 years	$396.02	$3,761
6 years	$340.98	$4,551

Long loans can also leave you owing more than the car is worth for years. Figures are rounded and for illustration only; try your own in the loan calculator.

Watch the extras

Extended warranties, service contracts and GAP insurance are generally optional. You don't have to buy them to get the loan, and you can often buy them elsewhere.
Ask for the price of the car, the loan and each extra separately, in writing.
Don't sign until the paperwork is complete. A "spot delivery", where the dealer later says the financing fell through and asks you to sign a new, costlier loan, is a known problem.

Before you sign

Compare the APR, length, total of payments and down payment across offers.
Ask whether there is a penalty for paying the loan off early.
Budget for insurance, fuel, parking, registration and repairs as well as the payment. See Car insurance basics.

If you have no US credit yet

Lenders may offer a higher rate, ask for a bigger down payment or a co-signer. A co-signer is fully responsible if you don't pay, so it is a big ask. Building some credit first can lower the cost; see Building US credit from zero. Be careful with "buy here, pay here" lots that advertise no credit check: their rates can be very high.

Handy tools

Loan and EMI calculator: monthly payment, total interest and a year-by-year table.
Monthly budget planner: see what is left each month and how your spending splits up.

General information, not financial advice. Rules, fees and rates change and depend on your situation. Check with your bank, the provider or a qualified professional before you decide.