My Best Buy credit store card carries an annual percentage rate that varies between 23.24% and 27.99%, with fixed interest rates between 9% and 24.34%. For the Best Buy Visa card, the variable rates fluctuate between 10.74% and 27.99%, with non- variable rates falling between 9.99% and 20.24%. However, if you apply for either credit card during a promotional period, you can expect different rates.