The amount you should charge for freelance digital marketing services depends on various factors, such as your experience, expertise, location, and the specific services you offer. As a beginner, you may charge around $25-$50 per hour, while an experienced freelancer can charge upwards of $100 per hour. Additional costs, such as software subscriptions or advertising expenses, are also essential. Ultimately, you should determine your rates based on industry standards and what you feel your services are worth. You can research online or consult with other freelancers in your field to get an idea of the going rates.