In order to explain informal payments in public health care services in Romania, this paper evaluates the relationship between extra payments or valuable gifts (apart from official fees) and the level of tolerance to corruption, as well as the socio-economic and spatial patterns across those individuals offering informal payments. To evaluate this, a survey undertaken in 2013 is reported. Using logistic regression analysis, the findings are that patients with a high tolerance to corruption, high socio-economic risk (those divorced, separated, or with other form of marital status, and those not working), and located in rural or less affluent areas are more likely to offer (apart from official fees) extra payments or valuable gifts for health care services. The paper concludes by discussing the health policy implications.