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Why do US stores and credit cards offer cashback rewards?

USPublished 6 October 2026 · Written by BuyMeWhiskey Editorial Team · How we check facts

Cashback is a marketing and customer-retention tool, not free money. Credit-card rewards are funded within the economics of the card and merchant relationship, while stores may use promotions to encourage customers to choose a payment method, return more often, or spend more.

Next question: What do the numbers on my credit or debit card mean? →

Check the Consumer Financial Protection Bureau’s guidance on credit-card rewards before chasing a cashback offer.

Read CFPB rewards guidance

Run your own numbers: Credit card payoff calculator.

Why businesses are willing to give money back

Cashback can look strange because a store appears to give something away after the purchase. The business is making a broader calculation. A reward can influence where a customer shops, how often they return, what card they use and how much they spend. For card issuers, rewards are part of a larger product economics model that includes interest, fees, merchant-related revenue and customer behaviour.

The Consumer Financial Protection Bureau describes rewards programs as ways consumers earn points, miles and cash back according to defined formulas. It has also warned that rewards can have complicated terms and may be changed or devalued.

Why are grocery stores especially interested in payment rewards?

Groceries are frequent purchases. That makes them useful for loyalty and payment strategies because a household may visit the same stores repeatedly. A cashback promotion can make one store or card feel more attractive without requiring the customer to switch all their finances.

That does not mean every customer is profitable simply because they earn rewards. If a shopper uses a high-cost credit card and carries the balance, interest can easily overwhelm a modest reward. The CFPB has specifically observed that consumers who carry revolving balances can pay much more in interest and fees than they receive in rewards.

Promotional rewards can be a customer-acquisition tool. A new cardholder may generate spending, fees or interest over time, and the issuer accepts an upfront reward cost in the hope that the relationship is valuable. CFPB guidance discusses promotional rewards such as sign-up bonuses and referrals.

A promotion is only useful if the conditions are clear. Look for spending requirements, time limits, exclusions, annual fees, redemption rules and what happens if the account is closed. A reward that looks large on an advert may be much smaller after fees or if you carry a balance.

Is an offer of a gift card automatically a scam?

No. A genuine bank or retailer can offer a legitimate promotional reward. The red flag is the payment or information request used to “unlock” it. The FTC warns that scammers use gift cards and unusual payment methods because money sent that way can be difficult to recover.

Verify promotions through the company’s official website or app. Never buy a gift card and give someone the number and PIN because they say it is needed to claim a reward, fix an account or pay a bill.

What happens to cashback when a purchase is refunded?

Rewards programmes have their own terms for reversed purchases and refunds. If the transaction that generated the reward is later reversed, the issuer may reverse the corresponding reward. The correct answer depends on the card’s current agreement and reward rules.

Do not assume you can move a purchase to another card or redirect a refund while keeping the first card’s rewards. Review the terms and keep the refund record.

Should you open a card just for the reward and close it?

That can be a poor trade if the reward requires spending you would not otherwise do, carries an annual fee, or encourages borrowing. The CFPB notes that rewards programmes can contain hidden or discretionary conditions and that benefits may change.

Closing a U.S. credit-card account can also affect your available credit and credit utilisation. CFPB consumer guidance says closing an account may negatively affect a credit score because it reduces available credit and can increase the percentage of credit being used.

How should you judge a cashback offer?

Calculate the reward on spending you genuinely planned to make.
Subtract any annual fee or unavoidable purchase cost.
Check whether the reward is taxable or has reporting consequences in your situation.
Compare the reward with the card’s interest cost if you may carry a balance.
Read redemption, refund and account-closure terms.

The biggest mistake is treating the reward as the main product. A good cashback offer is one that remains worthwhile after all costs and without changing your normal spending in unhelpful ways.

Worked example

Illustrative cashback calculation: assume a card pays an illustrative 2% cashback on $1,000 of eligible grocery spending and has an illustrative $95 annual fee.

Illustrative cashback: $1,000 × 2% = $20.
Illustrative net after annual fee: $20 − $95 = −$75.

This example shows why a reward rate should never be judged by itself. The $1,000 spend is illustrative and should represent spending you would have made anyway. The hypothetical card would not pay for itself from that cashback alone. If the card had no annual fee, the same reward would be positive value, subject to the card’s other terms and any interest charged.

The calculation also ignores taxes, timing, redemption limits and any interest charges, all of which can change the real economic result.

Why do grocery stores give cashback?#

Cashback can encourage customers to choose a store, payment method or loyalty relationship. Because groceries are frequent purchases, a promotion can influence repeat behaviour. The reward is part of the business economics, not a free gift detached from the price, payment and customer-retention strategy.

Are credit-card cashback rewards really free money?#

No. They are a benefit within a credit-card product. The issuer’s economics can include interest, fees and other revenue, and the customer may have to meet conditions. Rewards are most useful when you pay on time and avoid carrying costly balances just to generate cashback.

You can apply for a card and later close an account, but read the reward terms first. There may be eligibility, spending, fee or account-closure conditions. CFPB guidance also notes that closing an account can affect available credit and credit utilisation, which can affect credit scores.

What happens to cashback after a refund?#

It depends on the card’s rewards terms, but a reversed or refunded transaction may cause the associated reward to be reversed. Check the agreement and the rewards ledger after a refund. Do not assume the reward remains simply because it appeared before the purchase was refunded.

How can I tell if a cashback gift-card offer is a scam?#

Check the offer through the issuer or retailer’s genuine website or app. Be suspicious if someone demands an upfront payment, gift-card number, wire transfer, cryptocurrency or unusual payment method to release a reward. The FTC says scammers frequently use gift cards and other hard-to-recover payment methods.

Can credit-card rewards be changed after I earn them?#

Yes, rewards programmes can have terms that allow changes, and the CFPB has warned consumers about devaluation and complicated conditions. Check the current reward agreement rather than relying on an old advert. Also track redemption deadlines and restrictions so you do not assume a stated value is permanent.

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Next question →What do the numbers on my credit or debit card mean?

Sources

Figures were checked against these sources before publication. If a rule changes, we update the page and show the new date.

General information, not personal financial advice. Rules depend on your circumstances; check the official source or speak to a regulated adviser before acting.