However, the card may carry an annual fee based on your creditworthiness, has a high APR of 24.90 percent and carries a credit limit of only $300 (and if you have an annual fee, it will eat into your credit limit initially). Along with the potentially high cost of its fees and interest charges, the card’s low limit could make it challenging to build credit since it will be harder to keep your credit utilization ratio low — a significant factor in your credit score.