It all depends on the type of wax you're using. The maximum amount of fragrance oil recommended is listed in the Details section of each type of wax. For example, Golden Brands 464 Soy Wax has a maximum fragrance load of 12% or 2 ounces per pound of wax. As each type of wax has different maximum fragrance load percentages, refer to the fragrance information located on the wax information pages.