Credit card rewards programs are marketed as free money, but they operate on a business model that rewards specific spending patterns far more than others. Understanding where the money for rewards actually comes from helps explain why some cards are more generous than others. It also clarifies why rewards only pay off for people who avoid interest charges altogether.
Where Rewards Money Comes From
Every time a credit card is used, the merchant pays a processing fee to the card network and issuing bank, known as an interchange fee. A portion of that fee is set aside to fund the rewards program, which is why rewards cards tend to charge merchants slightly higher fees than basic cards. This means rewards are not free money from the issuer; they are a redistribution of fees already built into the price of goods and services.
Because interchange fees vary by merchant category, issuers can offer higher cashback rates on categories like groceries or gas without losing money, since those categories often carry higher processing fees to begin with.
Flat-Rate vs Category-Based Rewards
Flat-rate cashback cards offer the same percentage back on every purchase, which makes them simple to use without tracking spending categories. Category-based cards offer higher percentages on specific types of spending, such as dining or travel, but drop to a lower baseline rate on everything else. A cardholder who spends heavily in one or two categories can often earn more with a category-based card than with a flat-rate alternative.
The tradeoff is complexity: category-based cards require some attention to which purchases qualify for bonus rates, and many rotate categories periodically or cap the bonus spending at a certain dollar amount per period.
Why Rewards Only Pay Off Without Interest
The value of any rewards program collapses quickly once interest charges enter the picture, because even a modest APR erases cashback earnings within a single billing cycle of carried debt. A typical cashback rate might return a small percentage of spending, while carrying a balance at a double-digit APR costs far more than that in interest over the same period. This mismatch means rewards cards are genuinely valuable only for people who pay their statement balance in full every month.
Someone who carries a balance while chasing rewards is effectively paying the issuer far more in interest than they receive back in cashback, making the rewards program a net loss rather than a benefit.
Frequently Asked Questions
Do rewards points expire?
It depends on the issuer and program; some points or cashback balances never expire as long as the account remains open, while others expire after a period of inactivity. Checking the specific program terms is the only way to know for certain.
Is a cashback card better than a points or miles card?
Neither is universally better; cashback is simpler and more flexible, while points or miles can sometimes be redeemed for outsized value on travel if used strategically. The right choice depends on spending habits and willingness to manage redemptions.
Do rewards cards have higher fees than non-rewards cards?
Rewards cards often carry higher annual fees or slightly higher interest rates than basic cards, since the rewards funding has to come from somewhere. It is worth comparing whether the rewards earned actually exceed any annual fee charged.
Credit card rewards are a genuine benefit when used by someone who pays their balance in full every month and picks a card that matches their spending pattern. Outside of those conditions, the appeal of rewards fades quickly against the cost of carrying a balance.
