Low Interest Card vs Rewards Card: Which Saves More Money?
The credit card industry pushes rewards cards heavily because they are more profitable for issuers. But for millions of cardholders, a low interest card delivers far more real-world value. Here is how to calculate which is right for you.
The core trade-off
Rewards cards offer cash back, points, or miles on purchases, typically ranging from 1.5% to 5% depending on the category. To fund those rewards, they charge higher ongoing APRs, usually between 19% and 29%. Low interest cards offer APRs starting around 12% to 14% but with more modest rewards, often 1% to 1.5% cash back or none at all.
The question is simple: do the rewards you earn outweigh the extra interest you pay? The answer depends entirely on how much of your balance you pay off each month.
| Feature | Low Interest Card | Rewards Card |
|---|---|---|
| Typical ongoing APR | 12% - 18% | 19% - 29% |
| Rewards rate | 0% - 1.5% | 1.5% - 5% |
| Annual fee | Usually $0 | $0 - $695 |
| Best if you pay in full | Good | Better |
| Best if you carry a balance | Much better | Poor |
| Predictable long-term cost | Yes | Depends on behavior |
The maths for balance carriers
Suppose you spend $2,000 per month on a rewards card earning 2% cash back and carrying an average monthly balance of $1,500 at 24% APR. Your monthly cash back is $40. Your monthly interest charge is $1,500 x (24 / 100 / 12) = $30. So far the rewards appear to exceed the interest cost.
But now suppose the balance grows to $4,000 because of an unexpected expense. Your monthly interest becomes $80. Your cash back is still $40. You are now losing $40 per month to interest over rewards. At a $6,000 balance, you lose $80 per month. Interest scales with your balance; rewards scale only with new spending.
A low interest card at 13% APR on that $4,000 balance would cost $43 per month in interest rather than $80. Even if it earns no rewards at all, you are $37 per month better off. Over a year that is $444 in savings, more than most cardholders earn in rewards from a standard rewards card.
The break-even rule
If you pay your balance in full every month, the APR is irrelevant and a rewards card wins every time. If you carry any balance at all, calculate your monthly interest cost and compare it to your monthly rewards earned. The moment interest exceeds rewards, you are losing money by holding a rewards card over a low interest card.
When rewards cards genuinely win
A premium rewards card is the better choice if you pay your statement balance in full every single month without exception. In that case you pay zero interest regardless of APR, and the rewards are pure profit on spending you would have done anyway. Travel rewards cards can be particularly valuable if you fly regularly and use the card's travel benefits, since the redemption value of points can significantly exceed the cash back percentage.
The risk is behavioral. Many cardholders intend to pay in full but occasionally carry a balance when life happens. If that describes you, a low interest card provides a safety net that limits the damage when you cannot pay everything off.
The hybrid approach
Some cardholders use two cards: a low interest card for balance carrying and a rewards card for spending they pay off immediately. This optimizes both goals but requires discipline to keep the balances separate and ensure you are actually paying the rewards card in full each cycle.
A simpler version: get a low interest card with a modest rewards rate, such as 1% to 1.5% cash back. You sacrifice some rewards earning in exchange for a lower floor if your balance grows. Several cards in our comparison table above offer this combination.
What credit card companies want you to do
Rewards programs are funded by interchange fees from merchants and by interest from cardholders who carry balances. The more you spend and the more you carry, the more the issuer earns. Rewards marketing is specifically designed to encourage spending and to make you feel that carrying a balance is a reasonable trade-off for earning points.
Understanding this incentive structure helps you evaluate card offers on their actual financial merit rather than their marketing appeal. A card with no rewards that charges 12% APR will almost always save a balance carrier more money than a flashy rewards card charging 25%.
Quick decision guide
- ✓Pay in full every month without exception: choose a rewards card
- ✓Carry a balance most months: choose a low interest card
- ✓Carry a balance occasionally: choose a low interest card with basic rewards
- ✓Have a large specific purchase to finance: consider a 0% intro APR card instead
- ✓Already have a rewards card and carry a balance: calculate whether a switch saves money