The cost of a digital marketing agency can vary depending on several factors such as the size and scope of the project, the services they offer, the experience and expertise of their team, and their location. On average, digital marketing agencies charge anywhere from $2,000 to $25,000 per month for their services, with larger agencies charging more. However, smaller projects or shorter-term engagements can cost less. The best way to determine the cost is to request a proposal from the agency and discuss the details of your specific needs and goals. It's also important to keep in mind that the cost of a digital marketing agency can provide a good return on investment, as a successful digital marketing campaign can help drive sales, increase brand awareness, and attract new customers.