Abstract Background Public acceptability of a sugar-sweetened beverages (SSBs) tax is important for governments in the decision-making process. Therefore, the aim of the present study was to investigate the level of public acceptability of an SSBs tax and its associated factors. Methods Dutch adults representative of the Dutch population for age, sex, educational level and location (n = 500) completed an online self-administered questionnaire. The acceptability of an SSBs tax was measured on a 7-point Likert scale. Associations between acceptability and sociodemographic factors, body mass index, SSB consumption, and beliefs about effectiveness (9 items, e.g. 'An SSBs tax would reduce people's SSB consumption'), appropriateness (7 items), socioeconomic and economic benefit (5 items), implementation (1 item) and trust (3 items) were assessed using multivariable linear regression analyses. Results Of the participants, 40% supported and 43% opposed an SSBs tax in general. Moreover, 42% supported (43% opposed) an SSBs tax as a strategy to reduce overweight and 55% supported (32% opposed) an SSBs tax if revenue is used for health initiatives. Participants with a low educational level (B=-0.82;95%CI = [-1.31,-0.32]), overweight (B=-0.49;95%CI = [-0.89,-0.09]), moderate or high SSB consumption (B=-0.86;95%CI = [-1.30,-0.43] and B=-1.01;95%CI = [-1.47,-0.56], respectively) and households with adolescents (B=-0.57;95%CI = [-1.09,-0.05]) reported lower acceptability of an SSBs tax than their counterparts. Beliefs about effectiveness, appropriateness, socioeconomic and economic benefit, implementation and trust were associated with acceptability (P < 0.001). Conclusions Public acceptability of an SSBs tax tends to be higher if revenue is used for health initiatives. Sociodemographic factors, body mass index, SSB consumption and several beliefs about effectiveness, appropriateness, socioeconomic and economic benefit, implementation and trust are associated with acceptability. Key messages It should be considered to ...