What to compare when you're looking at rewards cards
Rewards cards look straightforward on the surface — you spend money, you get points or cash back. But the real difference between cards shows up in the details: how much you earn on different types of purchases, what you have to spend to unlock bonuses, and whether the annual fee (if there is one) actually costs you money or saves it.
The cards that work best for one person often work poorly for another. Someone who fills up at the gas pump twice a week and never eats out will earn more from a card that pays 3% on fuel than from one that pays 2% everywhere. A person who travels for work might value airline miles more than cash back. The comparison you need to make is specific to how you actually spend.
Start by gathering three pieces of information about yourself: your annual spending in each category (groceries, gas, restaurants, travel, everything else), whether you carry a balance month to month, and how much you're willing to pay in annual fees. Then look at the cards side by side using those numbers, not the marketing headlines.
Key Takeaways
- The best rewards card for you depends on where you spend the most money, not on which card has the highest advertised rate.
- A card with a $95 annual fee can still save you money if the rewards and bonuses add up to more than $95 per year in your actual spending pattern.
- Bonus categories (like 5% back on groceries for the first year) usually expire or have spending caps, so factor in what you'll earn after the bonus ends.
- If you carry a balance and pay interest, the interest charges will almost always exceed any rewards you earn, making the card a net loss.
- Comparing cards means looking at your own spending breakdown, not comparing their advertised rates to each other.
How to calculate your actual earnings from a rewards card
The only number that matters is what you'll actually earn in a year, based on how you actually spend. Here's how to work it out.
First, add up your spending in the last three months in each category the card rewards. If a card pays 3% cash back on groceries, 2% on gas, and 1% on everything else, you need to know how much you spend on groceries, how much on gas, and how much on other things. Pull your last few credit card or bank statements and sort the charges into piles.
Then multiply each category by the rate the card pays. If you spend $400 a month on groceries (that's $4,800 a year) and the card pays 3%, you earn $144 a year on groceries alone. Do this for every category the card rewards. Add them all up. That's your annual earnings from the card's regular rewards.
Next, add any sign-up bonus. A card that offers $200 cash back after you spend $500 in the first three months is worth $200 if you're going to spend that $500 anyway (not if you have to spend extra to get it). Be honest about whether you'll hit the spending requirement without changing your habits.
Finally, subtract the annual fee if there is one. If you earn $500 in rewards and the card costs $95 per year, your net benefit is $405. If you earn $60 in rewards and the card costs $95, you're losing $35 a year — and you should use a different card.
Comparing bonus categories and spending caps
Many rewards cards offer higher rates in certain categories — 5% back on groceries, 3% on dining, 2% on travel. These are called bonus categories, and they're where most of your earnings come from if you use the card right.
But bonus categories often come with limits. A card might pay 5% cash back on groceries, but only on the first $1,500 you spend per quarter. After that, it drops to 1%. If you spend $2,000 on groceries in a quarter, you earn 5% on the first $1,500 ($75) and 1% on the remaining $500 ($5), for a total of $80 that quarter — not 5% on the whole $2,000.
Read the fine print for every bonus category. Look for spending caps, time limits (some bonuses expire after a year), and whether the bonus applies to all purchases in that category or only certain ones. A dining bonus might not count takeout or food delivery. A travel bonus might not count gas station purchases even though you're traveling.
If a bonus category has a cap that's lower than what you spend, calculate your earnings using the cap, not your full spending. A card with a $1,500 quarterly cap on 5% groceries rewards is worth $300 a year on groceries (5% of $1,500 × 4 quarters), not 5% of your actual grocery spending.
When an annual fee makes sense and when it doesn't
A card with a $95 annual fee is not automatically worse than a card with no annual fee. It depends on whether the rewards and bonuses add up to more than $95.
Cards with annual fees usually offer higher rewards rates or bigger sign-up bonuses to make up for the cost. A card with no annual fee might pay 1% cash back on everything. A card with a $95 annual fee might pay 2% on groceries, 3% on dining, 2% on travel, and offer a $200 sign-up bonus. If you spend enough in those categories, the higher rates and bonus will more than cover the $95.
To decide, calculate your annual earnings (as described above) and compare it to the annual fee. If you earn $150 in rewards and the fee is $95, you come out $55 ahead. If you earn $60 in rewards and the fee is $95, you lose $35 — and you should switch to a no-annual-fee card.
Some cards waive the annual fee for the first year, which gives you time to see whether the card is worth keeping. Others offer a statement credit (like $100 back toward travel purchases) that effectively reduces the cost. Read the terms carefully so you know when you'll be charged and whether any credits explore automatically.
How interest charges erase rewards earnings
If you carry a balance on your rewards card and pay interest, the interest will almost always cost more than the rewards are worth.
Here's why: credit card interest rates are typically 18% to 25% per year. Rewards rates are typically 1% to 5%. If you carry a $1,000 balance at 20% interest, you pay $200 in interest charges per year. Even if you earn 5% cash back on that $1,000, that's only $50 in rewards. You lose $150.
The math gets worse the longer you carry the balance. If you pay $50 a month toward a $1,000 balance at 20% interest, it takes you 23 months to pay it off, and you pay $287 in total interest. Your 5% rewards on the original $1,000 ($50) don't come close to covering that.
If you're choosing between a rewards card and a low-interest card because you know you'll carry a balance, choose the low-interest card. The interest savings will be much larger than any rewards you'd earn. Only use a rewards card if you pay the full balance every month.
Comparing cards side by side: a real example
Let's say you spend roughly $6,000 a year on groceries, $3,000 on gas, $2,400 on dining, $4,000 on travel, and $5,000 on everything else. You pay your balance in full every month. You're comparing three cards:
Card A: No annual fee. 1% cash back on everything.
Card B: $95 annual fee. 3% on groceries, 2% on gas, 3% on dining, 2% on travel, 1% on everything else. $200 sign-up bonus after $500 spend in first three months.
Card C: No annual fee. 2% on groceries and gas, 1% on everything else.
Here's what you'd earn in year one:
| Card | Groceries | Gas | Dining | Travel | Other | Sign-up Bonus | Annual Fee | Total |
|---|---|---|---|---|---|---|---|---|
| Card A | $60 | $30 | $24 | $40 | $50 | $0 | $0 | $204 |
| Card B | $180 | $60 | $72 | $80 | $50 | $200 | –$95 | $597 |
| Card C | $120 | $60 | $24 | $40 | $50 | $0 | $0 | $294 |
In this example, Card B wins by a lot in year one because of the sign-up bonus. In year two, when there's no bonus, Card B earns $442 in rewards minus the $95 fee, for a net of $347 — still ahead of Card C's $294. Card A is the worst choice for this spending pattern.
But if your spending were different — say, you never dine out and rarely travel — Card C might beat Card B because you wouldn't earn enough in bonus categories to justify the annual fee. The right card depends on your numbers, not on which card has the highest advertised rate.
Other features to consider beyond rewards rates
Rewards are not the only reason to pick one card over another. Some cards offer benefits that might matter to you.
Purchase protection covers you if something you buy is damaged or stolen within a certain time frame (usually 90 days). Extended warranty extends the manufacturer's warranty on items you buy. Return protection lets you return items even if the store won't, within a time window. These are real benefits if you buy expensive items or electronics.
Travel benefits might include trip cancellation insurance, baggage delay reimbursement, or rental car damage coverage. If you travel frequently, these can save you money on travel insurance. Airport lounge access (on premium cards) gives you a quiet place to wait between flights.
Fraud protection and zero liability for unauthorized charges are standard on all credit cards, so don't let marketing language make them sound special. They're required by law.
Read the full benefits guide for any card you're seriously considering. Some benefits have restrictions or exclusions that make them less useful than they sound. A purchase protection benefit might not cover certain categories like jewelry or art. A travel benefit might only explore if you book through the card's travel portal.
Frequently Asked Questions
Should I get multiple rewards cards to maximize earnings in different categories?
Yes, if you're organized and pay attention to which card to use where. Using one card for groceries (3% back), another for gas (3% back), and a third for everything else (2% back) will earn you more than using one card everywhere. But only if you actually remember to use each card in the right category and pay all the balances on time. If you'll forget or miss a payment, stick with one card.
Is a high sign-up bonus worth changing cards every year?
Only if you can hit the spending requirement without overspending. A $200 bonus after $500 spend is worth $200 if you were going to spend that $500 anyway. It's worth $0 if you have to buy things you don't need to reach it. Also factor in the time cost of explore, activating, and managing multiple cards. For most people, one good card that matches their spending is simpler and nearly as profitable.
What if I'm not sure how much I spend in each category?
Pull three months of statements from your main bank account or credit card and sort the charges by category. Add them up and divide by three to get a monthly average. This takes 30 minutes and gives you real numbers instead of guesses. Your actual spending is almost always different from what you think it is.
Can I use a rewards card if I have fair or poor credit?
Most rewards cards require good credit (usually a score of 670 or higher). If your score is lower, you might not be approved. Check the card's requirements before you explore. Some cards are designed for people rebuilding credit, but they usually have no rewards or very low rewards rates. Focus on improving your credit score first, then move to a rewards card later.
Do I lose my rewards if I close the card?
No. Any rewards you've already earned stay in your account and you can use them. But you won't earn new rewards after you close the card. If you have a card with an annual fee and you've decided it's not worth keeping, close it after you've used up your rewards balance.