Cash Back or Low Interest Calculator - Calculator See


Cash Back or Low Interest Calculator

Compare auto manufacturer cash-back rebates against promotional low-APR dealership financing to find the lowest total cost.

Calculator Inputs

$
Total negotiated price.
$
Manufacturer rebate.
%
Rate if taking rebate.
%
Low rate without rebate.
Financing duration.

Calculated Results

Recommended Option
Take the $2,500 Cash Back Rebate (Saves $642.18)
Cash Back Monthly Payment $512.18 / mo
Low APR Monthly Payment $522.88 / mo
Total Cash Back Cost $30,730.80
Values calculate live as you adjust inputs.

About Cash Back or Low Interest Calculator

Compares taking upfront dealer cash rebates financed at standard credit union rates versus accepting dealer 0% to 1.9% subsidized financing.

What is Cash Back or Low Interest Calculator?

Compares taking upfront dealer cash rebates financed at standard credit union rates versus accepting dealer 0% to 1.9% subsidized financing.

How to Use This Calculator

  1. Enter total negotiated car price.
  2. Enter manufacturer cash rebate.
  3. Enter standard bank loan APR and dealer promo APR.
  4. Review lowest overall total cost and monthly payment.

The Mathematical Formula & Variables

Compare total payments of (Price - Rebate) at Standard APR vs Full Price at Promo APR

Step-by-Step Worked Example

Scenario: $32,000 car: $2,500 rebate with 5.9% loan vs 1.9% loan with no rebate over 60 months.

  1. Rebate loan borrows $29,500 at 5.9% = $568.96/mo ($34,137 total).
  2. Promo loan borrows $32,000 at 1.9% = $559.58/mo ($33,574 total).
  3. Low APR wins by $563 in this scenario.

Result: Take Promotional 1.9% Financing

Frequently Asked Questions

When does cash back usually win?

Cash back typically wins when the rebate is large ($3,000+) or the loan term is short (36-48 months) because less interest accrues.