A walkthrough, end to end.
- 1
Enter the vehicle price, the cash-back rebate amount, the manufacturer's low APR, and your alternative APR (credit union, bank).
- 2
The calculator runs both scenarios and reports total cost difference + monthly payment side-by-side.
- 3
Choose whichever scenario costs less for the term you'll keep the loan.
Two-scenario comparison
Scenario A (rebate): loan = price − rebate, financed at your alternative APR. Scenario B (low APR): loan = full price at manufacturer's reduced rate. Compare total interest paid + (any opportunity cost on the rebate cash).
What you can do with this.
Rebate vs. 0% APR (very common)
$3,000 rebate at 7% APR vs 0% financing at full price. Often the rebate wins because 0% is calculated on a higher loan amount. Always run the math; don't assume 0% is always better.
Long-term vs. short-term loans
Rebate often wins more clearly on longer (60–84 month) loans. Short loans (36 months) reduce the interest impact of the higher APR, narrowing the gap. Term length matters.
Manufacturer 1.9% vs. credit union 5%
Manufacturer rate isn't always the bottom-tier choice. If you can borrow at 5% from a credit union AND get the rebate, the rebate path may dominate. Run both scenarios.
Down payment effect
Rebate effectively acts as a partial down payment in scenario A. Higher initial down payment reduces interest impact further. The calculator's loan amount accounts for both rebate and any explicit down payment.
If you'll pay off early
Rebate scenarios benefit more from early payoff (you keep the rebate, save remaining interest). Low-APR scenarios less so (already low rate to save against). Factor your hold period.
Negotiate — both options should be on the table
Don't accept the dealer pitching only one option. Federal regs (Truth in Lending) require disclosing both. Push for the rebate even when taking low-APR — sometimes both available at once.
Cash-out option
Some manufacturers allow taking ALL of the rebate as cash-back even with 0% financing. Rare but happens — ask explicitly. Best of both worlds when available.
Cash back vs. low interest 2026 — what's current
With overall rates higher in 2026, the rebate path tends to win for buyers with strong credit who can finance through credit union at competitive rates. 0% APR offers have become rarer; 1.9–4.9% manufacturer specials more common.
Frequently asked.
No — that's the whole point of the calculator. The rebate often beats 0% when financed elsewhere at competitive rates. Run the math both ways.
Take the rebate. Cash buyers always benefit from rebates. Manufacturer financing offers add no value to a cash buyer.
Only if it's competitive after running this calculator. Get pre-approved through a credit union FIRST, use that quote as leverage at the dealer.
No. Calculations run entirely in your browser.