Tools

Cash Back vs. Low APR Car Loan Calculator

Car dealers often make you pick: cash back, or a low interest rate. Slide in your numbers and see which deal costs less in total, with taxes, fees, add-ons and interest included.

The winning deal
–
Step 1

The car

Loan length
Step 2

The two deals

Deal A Cash back ✓ Winning deal

From your bank or credit union. Getting pre-approved before you shop gives you this number.

Payment–
Full cost–

Deal B Low APR ✓ Winning deal

No rebate with this deal. Promo rates usually need excellent credit.

Payment–
Full cost–
Side by side

Full cost of the car, everything included

Price after any rebate, plus tax and fees, add-ons and loan interest. Interest is the cost of borrowing.

A Cash back + your loan
B Low APR
For comparison: pay in full, take the rebate
Car after rebate Tax and fees Add-ons Interest

Where your loan rate tips the scale

Cash back wins Low APR wins
0%3%6%9%12%15%

Step 3

Taxes and fees

Sales tax is charged on

It depends on your state. "Before rebate" is the safer guess until the dealer tells you.

Step 4

Add-ons the dealer offers

The finance office usually offers these after you agree on a price. Prices are typical asking prices and are often negotiable. You can say no to any of them.

Add-ons are
Good to know

What this doesn't show

  • The price matters most. Agree on the price of the car first, then talk about the rebate or the financing.
  • Promo rates need strong credit. If the dealer won't approve you for the low rate, the rebate may be the only real offer.
  • Long loans cost more and can leave you owing more than the car is worth for the first few years.
  • Taxes and fees are assumed to be rolled into the loan. A trade-in is assumed to lower the taxable price, which is true in most states but not all.
  • The full cost includes your down payment and trade-in, so both deals are measured the same way.

I'm not a financial advisor, and nothing here is financial advice. See the disclaimer.