This article explores factors influencing the extension of social protection to migrant workers in the region of the Cooperation Council for the Arab States of the Gulf (GCC). While there are some indications of new momentum for reforms, we find that reforms to address gaps in legal social protection coverage have historically been hindered by the very design of the migration system, including the assumed short‐term migration time frame and over reliance on employer‐sponsored provisions, as well as the political economy in the region, which translates into a segmented labour market and associated social protection entitlements for national and migrant workers, and limited channels for migrant worker representation. Despite some new mechanisms being developed, labour dispute and judicial systems are often ineffective in protecting workers and their families when benefits are not paid. Bureaucratic, financial, language, documentation and geographic barriers constitute further obstacles to migrant workers’ access to social protection in practice. The article closes with key policy implications, including measures for: developing comprehensive legal provisions in line with international standards and principles as well as the commitments to leave no one behind and to ensure social protection for all in the United Nations 2030 Agenda for Sustainable Development; addressing practical barriers, power imbalances and outreach, monitoring and enforcement gaps; and strengthening dialogue and collaboration between all actors, including GCC and country of origin governments, employers, workers, and wider stakeholders advocating for migrant workers’ rights.