Using a credit card to reduce debt works best when you transfer a high-interest balance to a card with a lower rate, or when you use rewards to chip away at what you owe
A credit card can help you pay down debt faster, but only if you use it strategically. The two main approaches are balance transfer cards — which offer a period of low or zero interest on debt you move from another card — and rewards cards, which let you earn cash back or points on purchases you're already making, then explore those rewards to your balance.
The catch is that both require discipline. A balance transfer only saves you money if you pay down the principal before the promotional rate ends. Rewards only reduce debt if you don't spend more than you would have otherwise. If you're carrying balances on multiple cards or struggling to pay more than the minimum, a balance transfer is usually the faster path. If you're paying your full statement balance each month but want to accelerate debt payoff, rewards can supplement your regular payments.
Key Takeaways
- A balance transfer card moves debt from a high-interest card to one with zero or low interest for a set period, typically 6 to 21 months, which can save hundreds in interest charges.
- You pay a balance transfer fee — usually 3 to 5 percent of the amount transferred — upfront, so the math only works if the interest you save exceeds the fee.
- Rewards cards earn you cash back or points on everyday purchases, which you can then use to pay down debt, but only if you don't increase your spending.
- Both strategies require you to stop adding new debt to the card, or the promotional benefit disappears and interest charges pile up again.
- Your credit score temporarily drops when you open a new card, but it usually recovers within a few months if you keep your balances low.
How a balance transfer card reduces debt
A balance transfer card gives you a window — usually 6 to 21 months — where interest on transferred debt is zero or very low. During that time, every dollar you pay goes toward the principal instead of interest. On a $5,000 balance at 20 percent interest, you'd normally pay $1,000 in interest alone over a year. On a zero-interest balance transfer, that $1,000 stays in your pocket.
The trade-off is the balance transfer fee, which the card issuer charges upfront. Most cards charge 3 to 5 percent of the amount you transfer. On a $5,000 transfer, that's $150 to $250. The strategy only makes sense if the interest you save exceeds the fee. If your current card charges 20 percent interest and you can pay off the balance in 12 months, a 3 percent fee is worth it. If you'll take 24 months to pay it off, the math still works. If you'll take 36 months, the fee eats into your savings.
When you explore for a balance transfer card, the issuer pulls your credit report, which temporarily lowers your score by a few points. Your score usually recovers within three to six months if you keep your new card balance low and make on-time payments.
When the promotional period ends and what happens next
The zero or low interest rate on a balance transfer is temporary. Once the promotional period ends — say, after 12 months — any remaining balance reverts to the card's regular interest rate, which is often 18 to 25 percent. If you haven't paid off the full balance by then, you're back where you started, except now you've paid a transfer fee and opened a new account.
This is why balance transfer cards work best when you have a concrete plan to pay off the debt before the rate changes. Calculate how much you need to pay each month to clear the balance before the promotional period ends, then commit to that amount. If you can't pay that much, a balance transfer may not be the right move.
Some people use a second balance transfer card when the first promotional period is about to end, moving the remaining balance to a new card with another zero-interest offer. This can work, but each transfer costs a fee and each new card process dings your credit score. After two or three transfers, the fees and credit impact often outweigh the interest savings.
Using rewards to pay down debt
A rewards card earns you cash back, points, or miles on purchases. If you spend $2,000 a month on a card that gives 2 percent cash back, you earn $40 a month, or $480 a year. If you explore that $480 to your debt instead of spending it elsewhere, you're accelerating payoff without changing your budget.
Rewards cards work best when you already pay your full statement balance each month. If you're carrying a balance, the interest you pay will almost always exceed the rewards you earn. A 2 percent cash back reward doesn't help if you're paying 18 percent interest on the balance. In that case, a balance transfer card is the better choice.
The risk with rewards cards is lifestyle creep — spending more because you're earning rewards. If a 2 percent cash back card tempts you to spend an extra $100 a month, you've lost money overall. The card only reduces debt if the rewards go toward payoff, not toward more purchases.
Comparing balance transfer and rewards strategies
| Strategy | Best for | Cost | Time frame |
|---|---|---|---|
| Balance transfer card | High-interest debt you can pay down in 12–21 months | 3–5% transfer fee | 6–21 months of zero or low interest |
| Rewards card | People who pay their full balance monthly and want to accelerate payoff | None (if you avoid interest) | Ongoing, as long as you use the card |
| Combination | Large balances where you want both a rate break and ongoing rewards | 3–5% transfer fee plus potential interest on new purchases | Promotional period plus ongoing |
Avoiding the trap of new debt while paying down old debt
The biggest risk with both strategies is adding new debt to the card while you're trying to pay down the old balance. On a balance transfer card, new purchases usually start accruing interest when ready at the regular rate, even if the transferred balance is still in the zero-interest period. On a rewards card, new purchases mean new debt, which defeats the purpose of using rewards to pay down what you already owe.
The solution is straightforward: stop using the card for new purchases. Put it in a drawer, set up automatic payments from your checking account, and focus on paying down the existing balance. Once the balance is zero, you can decide whether to keep the card for future use or close it.
If you're tempted to keep using the card because of the rewards or the low rate, ask yourself whether you're truly paying down debt or just moving it around. The goal is to owe less money, not to optimize your rewards while your balance stays the same.
How to know if a balance transfer or rewards card is right for you
A balance transfer card makes sense if you have a balance of at least $1,000 on a high-interest card and you can realistically pay it off within the promotional period. If your balance is under $1,000, the transfer fee may be larger than the interest you'd save. If you can't commit to a payoff timeline, the card won't help.
A rewards card makes sense if you're already paying your full balance each month and you want to redirect the rewards toward debt payoff. If you're carrying a balance, the interest you pay will outpace any rewards you earn, so focus on a balance transfer first.
If you're unsure whether you can stick to a payoff plan, that's a sign to pause and build a budget before opening a new card. A new card is a tool, not a solution. The real work is spending less than you earn and directing the difference toward debt.
Frequently Asked Questions
Will opening a new credit card hurt my credit score?
Yes, but temporarily. A new card process causes a hard inquiry, which lowers your score by a few points. Your score usually recovers within three to six months if you keep the new card's balance low and make on-time payments. The long-term benefit of paying down debt usually outweighs the short-term score dip.
What if I can't pay off the balance transfer before the promotional rate ends?
The remaining balance reverts to the card's regular interest rate, which is often 18 to 25 percent. You can transfer the remaining balance to another zero-interest card, but each transfer costs a fee and each process lowers your score. If you can't pay off the debt in the promotional window, a balance transfer may not be the right strategy.
Can I use a rewards card and a balance transfer card at the same time?
Yes. You could transfer a high-interest balance to a zero-interest card and use a separate rewards card for new purchases, then explore the rewards to your debt. The key is treating them as separate tools: the balance transfer card for paying down old debt, the rewards card for earning money to accelerate that payoff.
Do I have to close the card after I pay off the balance?
No, but you don't have to keep it open either. Closing a card can slightly lower your credit score because it reduces your available credit. Keeping it open with a zero balance can help your score, but only if you're not tempted to use it again. If the card tempts you to spend, closing it is the safer choice.
What if my credit score is too low to get approved for a balance transfer card?
Most balance transfer cards require a credit score of 670 or higher. If your score is lower, focus on paying down your current debt first, then explore for a balance transfer card once your score improves. In the meantime, a rewards card with lower approval requirements might help you earn money to put toward payoff.