If you're carrying credit card debt, you have two main tools: a 0% balance transfer card (no interest for 12–21 months, then a higher rate) or a card with a genuinely low ongoing APR (no intro offer, but a lower rate long-term). Which saves you more depends on one key variable: how long it will take you to pay off the debt.
Let's compare two strategies for a $5,000 balance. Strategy A: transfer to a 0% card with a 3% fee, 18-month intro, then 22% APR. Strategy B: move to a card with a 14% ongoing APR.
| Balance Transfer (0%/18mo, then 22%, 3% fee) | Low Ongoing APR (14%) | |
|---|---|---|
| Upfront fee | $150 (3% of $5,000) | $0 |
| Months 1–18 interest | $0 (0% intro) | ~$630 |
| Total extra cost | $150 | ~$630 |
| Winner | Balance Transfer saves ~$480 | — |
| Balance Transfer (reverts to 22% after 18 months) | Low Ongoing APR (14%) | |
|---|---|---|
| Months 1–18 cost | $150 fee, $0 interest | ~$630 interest |
| Months 19–36 cost | ~$720 (22% on remaining balance) | ~$500 interest |
| Total extra cost | ~$870 | ~$1,130 |
| Winner | Balance Transfer saves ~$260 | — |
| Balance Transfer (reverts to 22%) | Low Ongoing APR (14%) | |
|---|---|---|
| Total extra cost (48 months) | ~$1,550 | ~$1,450 |
| Winner | — | Low APR card wins |
The break-even principle: If you can realistically pay off the debt within the 0% intro period (minus the transfer fee), a balance transfer card wins. If you'll need longer — especially past 30+ months — a low ongoing APR card typically costs less in total. Use the calculator to check your specific numbers.
At 3%, a $10,000 transfer costs $300 upfront. A low-APR card has no upfront cost. Factor this into your maths before assuming the 0% offer is free money.
Balance transfers only work if the new card's credit limit covers your full balance. If you can only transfer $3,000 of a $7,000 debt, the calculation changes significantly.
The most common mistake: using the balance transfer card for new purchases while trying to pay off the transferred balance. Most issuers apply payments to the lower-APR balance first, meaning new purchases accrue interest at the post-intro rate. A low-APR card removes this trap.
If you'll continue using the card after paying off the balance, the ongoing APR becomes critical again. A balance transfer card that reverts to 22%+ is a bad long-term card to carry in your wallet.
Opening a new card creates a hard inquiry (small, temporary score dip) and temporarily lowers your average account age. If you're planning other credit applications soon, time your application strategically.
Looking specifically for balance transfer cards? Our sibling site has a dedicated comparison of the best balance transfer offers, including cards with 0% intro periods and no transfer fees. See the full balance transfer comparison →
A balance transfer card wins when you can realistically pay off the entire balance within the 0% intro period. On a $5,000 debt, paying only the 3% transfer fee ($150) vs. ~$700 in interest at 14% APR over 18 months is a clear win. The key assumption is discipline: you must use the card only for the transferred balance and not new purchases.
A low ongoing APR card wins when you can't pay off the balance within the intro period. Once a balance transfer card's 0% period ends, it typically reverts to 20–29% APR — often higher than a dedicated low-APR card. If your debt will take 2+ years to clear, a card with a 12–14% ongoing rate usually costs less in total interest.