Car Rebate vs Financing Calculator

When you buy a new car, manufacturers often offer two incentives: a cash rebate (which reduces your loan balance) or a promotional low interest rate. You typically can't take both. The cash rebate lowers the amount you borrow, while low-rate financing reduces your monthly interest charges. Which saves more depends on the size of the rebate, the interest rate difference, and your loan term.

The rebate usually wins when the promotional financing rate is only slightly lower than what you'd qualify for on your own, or when the rebate amount is large. If you can secure a competitive rate from your bank or credit union, the upfront reduction in your loan balance from the rebate often outweighs the interest savings from dealer financing.

Dealer financing tends to win when the promotional APR is significantly lower than your standard rate — for example, 0% or 0.9% versus 6%+ from a bank. The longer the loan term, the more impactful a lower interest rate becomes, potentially saving more than the rebate would have reduced your balance.

Yes. Promotional financing offers are typically reserved for buyers with excellent credit (usually 700+). If your credit score means you'd pay a higher standard APR, the interest savings from promotional financing become even more valuable. Check what rate you'd actually qualify for before comparing the two options.

In some cases, yes — dealers may apply the rebate toward your down payment. However, for calculation purposes, a rebate reduces your financed loan amount whether applied directly or as a down payment reduction. Either way, it lowers the principal you're borrowing at your standard interest rate.

Zero-percent financing means you pay no interest at all, so your total repayment equals only the vehicle price minus your down payment. In this case, the low-interest option is almost always better unless the cash rebate is extremely large. Enter 0 as the promotional APR in this calculator to see the exact comparison.

Sales tax is applied to the vehicle price in both scenarios, so it doesn't change which option is better on its own. However, some states calculate tax on the price before the rebate is applied, which effectively makes the rebate less valuable. Check your local tax rules for the most accurate comparison.

Absolutely. Always negotiate the best possible vehicle price first, independent of the financing discussion. Dealers sometimes adjust their willingness to negotiate based on which financing path you choose. Settle on a price first, then evaluate your rebate vs. financing options separately for a truly accurate comparison.