Many e-commerce platforms charge per month for their paid plans, while some provide free versions. While some businesses offer discounted annual payment plans, others take a portion of each sale and a monthly percentage of profits. Other businesses favor a one-time, flat fee that grants the user licensing rights. Although costs are sometimes all-inclusive, some suppliers charge extra for plug-ins, add-ons, and extras like personalized domain names and prolonged technical assistance. Typical price points: Lowest cost: $0 to $9.50 per month Average: $299 per month Maximum cost: $7,500 one-time payment