Credit

Compare an auto loan before you sign

Look beyond the monthly payment to the APR, term, amount financed, and total cost.

  • Free lesson
  • Reviewed July 2026

You will learnCompare loan offers on the same terms and explain why a longer loan can cost more.

Quick scenario

Choose an answer to see the explanation.

Does the auto-loan offer with the lower monthly payment always cost less?

Worked example

A shorter and a longer loan

Two illustrative offers finance $18,000. A 48-month loan at 7% has a higher monthly payment than a 72-month loan at 7%, but the longer loan keeps the balance open for two extra years and produces more total interest.

Compare more than the monthly paymentSame amount financed · same APR
48 monthsHigher paymentFewer months of interest
72 monthsLower paymentMore months of interest

Use the written total of payments to compare the full cost.

Key ideas

Three things to know

Compare the same five numbers

Write down the vehicle price, down payment, amount financed, APR, and loan term. Then compare the monthly payment and total of payments. A dealer may focus on the monthly payment because changing the term can make it look smaller.

Read more
  • Vehicle price
  • Amount financed
  • APR
  • Number of payments
  • Total of payments

A longer term can cost more

When the amount and rate are similar, more months usually mean more time for interest to accrue. A long term can also leave a borrower owing more than the vehicle is worth for longer.

Check the final paperwork

Review whether taxes, fees, service contracts, warranties, or other add-ons were included in the amount financed. Make sure the written contract matches the offer you intended to accept before signing.

Practice

Compare written offers

Use the example first. Then change one number and compare the result.

Interactive calculator

Compare a 48- and 72-month loan

Use the same amount and APR to see how a longer term changes both the payment and total paid.

48 months$431.03 / month

$20,689.56 total paid

72 months$306.88 / month

$22,095.51 total paid

Extra paid with 72 months$1,405.96

The longer term lowers the monthly payment but increases the estimated total. Compare these figures with the lender’s written disclosure and any add-ons.

Knowledge check

Check your understanding

Question 1 of 2

Why can a longer auto loan cost more even with a lower payment?

Sources

Sources