A disadvantage of personal selling is that it increases a company's operating costs. Personal selling involves hiring salespeople to interact directly with potential customers, which requires the company to pay for their salaries, commissions, training, travel expenses, and other related costs. Compared to other forms of marketing such as advertising or digital marketing, personal selling can be more expensive and time-consuming. Additionally, personal selling may not always guarantee a sale, which can lead to lower returns on investment for the company.