For a small to medium business, approximate monthly costs are:
- SEO: $500–$5,000+
- Google Ads management: $300–$2,000+ (plus ad spend)
- Social media marketing: $500–$5,000+
- Content marketing: $500–$10,000+
- Email marketing: $100–$2,000+
- Full-service digital marketing agency: $1,500–$20,000+ per month
The actual cost depends on factors such as business size, industry competition, target market, and campaign goals.