Store-branded credit cards are charging record-high interest rates, according to a new CreditCards.com report.

The worst offender actually turns out to be the wholesale retailer, Big Lots. The store charges 29.99 percent, while jeweler Zales also charges a staggering 29.24 percent. Staples too charges an interest rate of 28.24 percent.

Typically, a store charges about 23.84 percent for their cards, which is much higher than the national average for all credit card (15.22 percent).

Retailers get customers to sign up for these cards by offering incentives, however, deals aren’t often very generous or of much benefit to the consumer.

17 of the sign-up bonuses are calculated as a percentage, so they might make sense for large purchases. As an example, Best Buy’s 10 percent sign-up bonus would be worth $100 to someone who buys a TV for $1,000. The benefit would be lost however unless the cardholder pays off the entire bill before interest begins to accrue.

“With their outrageously high APRs, most consumers would be wise to steer clear of these cards unless they’re 100 percent certain they can pay their balance off every single month,” said Matt Schulz, CreditCards.com’s senior industry analyst. “And even then, there are plenty of general-purpose credit cards with better sign-up bonuses.”

Almost all of these store cards offer rewards for ongoing spending. As with sign-up bonuses, many of the rewards are dwarfed in comparison to those offered by general-purpose cards, although they could make sense for frequent shoppers. As one example will clearly indicate, someone who spends a lot of money at Target would benefit from its 5 percent cash-back program since the best general-purpose cash-back cards yield about 2 percent.