Cash Back or Low Interest Calculator
Compare whether a dealer cash-back rebate or a low interest rate financing offer saves you more money on a car purchase.
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Cash Back vs. Low Interest
Dealers often offer either a cash rebate OR a special low financing rate. Use this calculator to determine which offer results in the lowest total cost over your loan term.
What is the Cash Back or Low Interest Calculator?
The Cash Back vs. Low Interest Calculator is an essential tool for car buyers. Dealerships often force you to choose between two incentives: a massive upfront cash rebate, or an extremely low financing interest rate (like 0% APR). This tool finds the mathematically cheaper option.
How It Works (Algorithm)
The calculator runs two parallel amortization schedules. Scenario A subtracts the cash rebate from the car's price but applies a standard bank interest rate. Scenario B keeps the full car price but applies the dealer's subsidized low interest rate. It compares the final total cost of both.
$$ \text{Total Cost} = (PMT \times \text{Months}) + \text{Down Payment} $$
The true-cost formula used to evaluate auto dealer incentives.
How to Use It
Enter the vehicle price. Input the dealer's Cash Rebate offer alongside the standard bank interest rate. Then, input the dealer's Low-Interest offer. The tool will calculate both paths and highlight which choice saves you the most money over the life of the loan.