This paper assesses the possible dynamic effects of occupational entry regulations (OER) on productivity. It combines firm-level productivity data with a new cross-country policy indicator measuring the stringency of OER by the presence of administrative burdens, qualifications requirements, and mobility restrictions, for five professional and ten personal services. The evidence suggests that bold reforms easing OER, especially those concerning qualification requirements, could help increase the contribution of personal and professional services to aggregate productivity growth via two channels: the acceleration of their catch up to best global practices (within-firm channel), where firms in regulated sectors could gain up to 2.5 percentage points of productivity on average; and a higher contribution of labour reallocation to firms’ employment growth (between-firm channel), which could increase by up to 10 percent for the most productive firms.