Dyeing your hair blonde can cost anywhere from $50 to $200, depending on the method you choose and the length and thickness of your hair. If you're looking for a cheap option, box dye is the way to go. However, if you want professional-looking results, it's best to visit a salon. Keep in mind that bleaching your hair can be damaging, so it's important to use a good conditioner and follow up with regular trims.