Cashback and points sound like free money, yet CFPB data shows that people who carry a balance earn just 27% of rewards while paying 94% of the interest and fees. Here's how rewards actually work, and the one rule that determines whether they pay off at all.
Before this: How Credit Scores Work
Key takeaways
- Rewards only work if you never carry a balance. Carrying one month to month means you earn just 27% of rewards while paying 94% of interest and fees.
- Paying your full statement balance by the due date preserves the grace period and keeps interest at zero; carrying any balance breaks it.
- Cashback vs. points is a question of fit: choose the currency you'll actually use, not the one with the most marketing behind it.
- Every card application is a hard inquiry; multiple applications in a short window compound and signal greater risk to scoring models.
Credit card rewards are everywhere right now: cashback percentages, points multipliers, sign-up bonuses. The pitch is that your spending earns you something back for free. It’s an appealing idea, and for the right person using a card the right way, it has real merit. But there’s a foundational condition underneath all of it that most rewards marketing skips straight past.
The CFPB studied how rewards actually flow in the credit card market, and the picture it found is stark.
That single data point reframes the whole conversation. 1 The rewards system is not equally available to everyone who holds a rewards card. It largely flows to the people who pay in full every cycle. The people carrying balances are, on net, subsidizing those rewards through the interest and fees they pay, and collecting very little of them in return. 1
This isn’t a reason to dismiss rewards entirely. It’s a reason to understand the one rule that determines whether they work for you at all.
The rule everything else depends on
If you carry a balance from one month to the next (even a small one), interest charges will almost certainly erase whatever rewards you earned, and then some. The CFPB is direct about this: for people with revolving balances, the card’s APR and fees matter more than cashback or sign-up bonuses. 1
The mechanism behind this is the grace period. When you pay your full statement balance by the due date, your card issuer is required to give you a grace period: interest on purchases does not accrue during that window. 2 Pay in full, and your purchases are effectively interest-free between the statement date and the due date. That’s when rewards are genuinely free.
Carry a balance, and the math changes immediately. You lose the grace period, and interest begins accruing on purchases from the moment they’re made. 2 A 2% cashback rate on a few hundred dollars earns a few dollars back. A 20%-plus APR on a carried balance accrues far faster than that.
Rewards are a rebate on spending you were already going to do, but only if the interest cost to collect them is zero.
The practical implication is simple, if not always easy: if you might carry a balance this month, the card’s interest rate matters more than its reward rate. Choose accordingly.
Cashback vs. points and miles
Once you’ve confirmed that you genuinely pay your balance in full every month, the question of which reward type to carry becomes worth thinking about. The two main currencies are cashback and points (or miles).
Cashback is the simpler one. A percentage of eligible purchases comes back to you as a statement credit, a deposit, or a check. The value is fixed and transparent: 1.5% cashback on $100 of groceries is $1.50, no conversion required. It’s easy to compare across cards, and there’s no redemption complexity.
Points and miles are less straightforward. A point or mile has no fixed dollar value; what it’s worth depends entirely on how and where you redeem it. This creates real flexibility for people who want to use rewards for travel or specific categories, but it also means the value you extract varies widely based on redemption choices. There’s no universally correct answer about which system is better, only whether it fits how you actually spend and how you actually plan to redeem.
The honest framing: cashback suits people who want simplicity and predictability. Points suit people who are genuinely motivated to engage with the redemption side and have spending patterns that align with how a given card’s categories are structured. Neither is superior in the abstract. What matters is whether the reward you’re earning is one you’ll actually use.
Sign-up bonuses: what they are and what they cost
Many rewards cards offer a sign-up bonus (sometimes called a welcome offer) as an incentive to open the account. The structure is typically the same: spend a set amount within a specified window after opening, and you receive a one-time reward in addition to ongoing earnings. These bonuses can be substantial, and they’re one reason people are drawn to certain cards.
What they are in practice: a one-time reward funded by the bet that you’ll find the card useful (or profitable to the issuer) over time. If you meet the spend threshold, pay in full every month, and the reward is valuable to you, that’s a reasonable exchange.
The credit cost is less obvious. Every new card application triggers a hard inquiry on your credit report. A single inquiry is minor: typically fewer than five points, and FICO factors it for about the first year, though it stays visible on your report for up to two years. 4 The trouble starts when applications stack up. Multiple hard inquiries can have a compounding effect on your score. 4
Beyond the inquiry, every new card is a new account. New credit is about 10% of a FICO Score, and opening several accounts in a short window signals greater risk to the scoring model, a sharper signal for people without a long credit history. 3 Account age is also a factor: length of credit history is about 15% of the score, and many new accounts lower your average account age. 3
The grab-bonus-then-cancel mechanic
Some people open a card, collect the sign-up bonus, and then close the account. This is sometimes presented as a straightforward way to extract value from a card without committing to it long-term. It’s worth understanding what this actually involves, neutrally.
Opening and then canceling a card stacks inquiries and doesn’t let the account age, compounding the credit costs described above. A canceled card eventually falls off your report and, when it does, your average account age may shorten further. Issuers are also aware of this behavior pattern, and they have their own responses to it: they may claw back a bonus if they determine the account was opened primarily to collect it, close your other accounts with that issuer, or decline future applications, and they’re not required to notify you in advance of where the line is.
None of these outcomes are guaranteed, and the specific thresholds differ by issuer and change over time. The point is simply that this mechanic carries real risk on multiple fronts: to your credit score, and to your relationship with the issuer.
For the full treatment of why this pattern is higher-risk than it looks, the churning guide covers it in detail.
Putting it together
Rewards cards are a legitimate tool for people who use credit cards in a specific way: paying the full statement balance every month, without exception. If that’s consistently true for you, a card whose reward structure fits your actual spending can return real value over time. If it’s not consistently true, the APR and fee structure matter more than any reward rate, and the CFPB’s data on who actually benefits from rewards is the clearest reason why. 1 2
The sign-up bonus question deserves the same honest look. The one-time reward may be worthwhile. The inquiry, the new-account signal, and the average-age drag are real costs: minor for a single well-considered application, compounding if you’re chasing multiple bonuses in a short window. 3 4
Choose a reward type that fits how you spend. Confirm you can pay in full every month before optimizing anything else. And if you’re thinking about opening more than one card in a short period, read the churning guide first.
Sources
Every factual claim in this guide traces to an official source. Last reviewed June 2026.
CreditGlow is educational content, not individualized financial advice. We explain how credit works in general, not what's right for your specific situation. For decisions about your credit, check the official sources cited or talk to a qualified professional.