$30,000 purchase

Cost or constraint

Option A: 0% for 60 months

Timing or value

Option B: $2,500 rebate plus 5.5% loan

Cost or constraint

Option B interest: about $4,000 before rebate

Timing or value

0% wins by about $1,500 if all other terms match

Keep the time period, usage and exit point consistent across both choices.

Compare the alternatives on equal terms

Compare transaction prices first

Use the out-the-door price after mutually exclusive incentives. Then model each financing schedule. Dealer add-ons or a lost cash discount can outweigh the advertised rate.

Separate true 0% from deferred interest

Deferred-interest promotions may charge accumulated interest if the balance is not fully paid by the deadline. Read the trigger and payoff allocation terms.

Do not stretch the purchase

A low payment can make a larger purchase feel affordable. Compare total cost against the least expensive product that meets the need, not only against another way to finance the same price.

This decision belongs in The Real Cost of Borrowing. Use Compare Loan Terms: Put Payment Relief Beside Total Interest to check the next assumption, then test the numbers in the Loan Comparison Calculator.

Make both options comparable

A zero rate can still lose to a cash rebate or lower transaction price. Compare the financed price, required products and forgone discounts before treating interest savings as the winner.

Offer details that need separate lines

  • Cash price after every generally available discount.
  • Promotional price and products required to qualify.
  • Payment schedule plus any deferred or post-promotion rate.
  • Negotiate or record the out-the-door price before selecting financing.
  • List every incentive that disappears under the zero-percent offer.
  • Calculate the alternative loan using the rebate-adjusted price.
  • Verify whether the promotion is true zero interest or deferred interest.
  • Compare the result with buying a less expensive suitable product.

Compare both paths on the same clock

Loan Comparison Calculator

Compare offers on the same amount and time horizon, including their different fees.

Where the comparison stops being fair

  • Comparing monthly payments instead of transaction prices.
  • Counting a rebate that cannot be combined with promotional financing.
  • Calling deferred interest zero percent without modeling the deadline.
  • Buying a higher-priced item solely because credit appears free.

Questions this decision usually raises

Is zero-percent financing really free?

It can have no stated interest, but lost rebates, price differences, fees, and add-ons can create an economic cost.

Should I pay cash instead?

Compare any cash discount and the value of retained liquidity without assuming a guaranteed investment return.

What happens after a missed payment?

Promotional consequences vary. Read default, late-payment, and deferred-interest terms before signing.

Evidence behind the comparison

This page explains a calculation, not a personal recommendation. Contract rules and consumer protections vary by product and jurisdiction. Check the current agreement and official guidance before acting.