caution

Most credit card issuers set things up so you pay off the lowest APR charges first, and the highest interest charges last.

At first sight, it doesn’t sound like a big deal, or necessary a bad deal, but open closer inspection, you’ll see why many card issuers choose this payoff structure.

Imagine you execute a balance transfer, moving $2,000 to a new credit card with 0% APR for 12 months, but 25.99% APR on purchases.

Then you decide to make a purchase with that credit card, adding a $250 charge to the existing $2,000 balance.

Over the following 12 months, if you continued to carry and slowly pay off that $2,000 balance at 0% APR, you’d be accruing interest on the $250 purchase if your card issuer uses a negative payment hierarchy.

Because the purchase APR of 25.99% is higher than the 0% APR from the balance transfer, it won’t be paid off until the $2,000 is wiped out.

That could mean months and months of accrued interest on a seemingly innocuous purchase, leading to a nasty surprise down the line.

For that reason, I recommend setting aside the credit card you used solely for a balance transfer to avoid any extra charges that will throw off the 0% APR nature of the card.

To avoid confusion, use another credit card for purchases, that way you won’t get caught with a high APR charge waiting in line to be paid off behind your lower APR charges.