the short answer
Personal trainer income varies widely; it is not a fixed salary. In-person trainers are capped by billable hours, so most earn a modest-to-comfortable living. Online trainers break that ceiling: a coach with 30 clients at EUR 150 a month grosses around EUR 4,500 before software and fees. Your real number is clients times price minus costs - which is why price and retention matter far more than hours worked.