To get the full savings from a balance transfer card, clear the balance before the 0% rate ends. Divide what you move, plus the transfer fee, by the promo months and set autopay for that amount. Keep new purchases off the card, never pay late, and don’t let the old card fill back up.
Moving a high-rate balance to a 0% card stops the interest only for the promotional period. Whatever is left when it ends starts accruing at the card’s regular rate, and the Federal Reserve puts the average card rate at about 21%.
Used right, the math is hard to beat. Say you owe $10,000 at 22% and pay $500 a month. It takes 26 months and costs about $2,570 in interest. Move it to a card with 0% for 21 months and a 5% transfer fee, the terms on Wells Fargo’s Reflect card, and the same $500 a month clears the $10,500 in exactly 21 months. You pay $500 in fees instead of about $2,570 in interest, roughly $2,000 saved, and you finish five months sooner.
Four mistakes wipe out those savings.
- Paying only the minimum. The balance plus the fee, divided by the promo months, is your real payment. Set autopay for it.
- Adding new purchases. If the card charges interest on purchases, new ones start accruing right away, and federal rules send anything above your minimum payment to the highest-rate balance first, so the transfer balance barely moves.
- Paying late. Once you’re more than 60 days behind, the issuer can cancel the 0% rate.
- Refilling the old card. A transfer only moves the debt, and running the old card back up doubles it.
Check the transfer deadline before you apply, too. Reflect’s 0% rate covers transfers requested within 120 days of opening the account, and other cards set their own window.
If you can’t afford the payment that clears the balance in time, the transfer still cuts your interest, just by less. Compare the card’s rate after the promo with the one you pay now, because that’s what any leftover balance will cost.
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