People switch credit cards for a lot of reasons. Maybe they’re looking for new perks from their cards or want cash-back offers.

But what’s the number reason they switch? Wallethub’s 2018 Summer Credit Card Survey’s says it’s because they want a better interest rate.

“The average APR among those surveyed was 19 percent, and carrying a balance with an interest rate that high can be costly,” said CNBC. “The average U.S. household with revolving credit card debt pays almost $900 in interest each year.”

Image via PYMNTS.