How much does MERN SaaS development cost?

A focused MERN SaaS MVP costs $20,000 to $45,000 and ships in 8 to 12 weeks with two engineers. A mid-sized MERN SaaS with multi-tenancy, billing, feature flags, admin, and analytics lands between $50,000 and $130,000 over 4 to 6 months. Our MERN developers start at $22/hr. Scope is the single biggest cost driver, which is why we lock it in week one before any code is written. See our full MERN development cost breakdown for a detailed breakdown by project type and region.