As an entrepreneur/freelancer, I don't have a lot of firsthand experience with Finnish labor laws, but my impression is that in practice such limitations apply

As an entrepreneur/freelancer, I don't have a lot of firsthand experience with Finnish labor laws, but my impression is that in practice such limitations apply mostly to manual laborers in bigger corporations. Going by the book, the labor laws also allow for paid overtime (up to 2x salary), but that is limited no more 138h per 4 month period, or approximately 8h per week. And even then the employee can decline. But that's if we go by the book... Many of my friends working in specialist jobs across various industries regularly work overtime, often without compensation. I guess they could technically decline but if your plan is career progression that might not be a smart move outside unionized workforces.