The main aim of this paper is to investigate the micro and macro predictors of Portuguese willingness to pay (WTP) more taxes to bolster funds channelled to the National Health Service (NHS). An online questionnaire was used to collect data from 584 Portuguese citizens. The statistical analysis was performed through the application of logistic regressions. The research shows that willingness to support increasing taxes depended on socioeconomic, behavioural, and psychological factors. The WTP more taxes to finance the NHS were associated (...) with younger ages, life satisfaction and dispositional optimism, satisfaction with the NHS performance, current perceived risk exposure, and risk orientation. Identifying and understanding the main influencing factors associated with WTP more taxes for NHS is essential to assist policy-makers in developing healthcare reforms. Decision-makers may take this opportunity to improve the NHS since those who ultimately benefit from the measures can provide an additional source of health financing. (shrink)