In the Philippines, bans on the use of plastic bags have been enacted in 489 cities and towns as a means of stemming waste, while proposed legislation for a nationwide prohibition has been pending for several years. The national single-use plastic (SUP) ban is a significant step forward in mitigating plastic pollution and climate change, but it will have economic and employment impacts on firms and workers. This study fills in a gap by estimating the employment impact of a national ban using firm-level data from official surveys. An exploratory labour-centric methodology interrogates workers’ perceptions of a ban through interviews with unionists. The study finds the employment effect to be significant, as 32,000 workers in almost 500 SUP firms will be directly affected, and another 9.000 workers in the midstream plastic industry will be indirectly impacted. Workers have a range of opinions regarding a proposed ban – from opposition because of the expected layoffs to acceptance as a necessary solution to plastic pollution. However, support for a SUP ban is predicated on the existence of alternative employment for affected workers. The study reveals that workers are receptive to a message that integrates both environmental concerns and labour standards. However, there is a serious lack of information dissemination from plastic firms and government agencies about the proposed SUP ban and the necessary adaptation measures to prepare workers for a transition. The economic, sociocultural, and institutional barriers to an effective just transition for SUP workers are substantial but not insurmountable.