Cincinnati Your teen can spend less on prom than $ 1,000. Visa Survey national average, but you still do not want the evening to crush your family budget. You can never find a discount tuxedo for your son, but there are several options to save money on the long prom dresses under 50 your daughter. She will want a style that is unlikely to see another girl, and she may want to maximize your credit card to get it. Try encouraging them to think creatively and economically with these suggestions.