This paper examines the extent to which low household income influences access to primary health care in both the US and the UK. The basic approach is to ask whether, given data about a person's age, sex, and self-reported general health status and history, extra information about whether or not they come from a low-income household adds a statistically significant amount to the probability of their obtaining various amounts of primary medical care. The measure of primary medical care is derived from the number of physician visits and it, along with the other data, is drawn from the 1977 US National Medical Care Expenditure Survey and the 1980 UK General Household Survey. Although the two surveys cover different sample periods, they are similar enough to make comparisons between the two countries possible. The main conclusion drawn from the study is that low household income is not an important determinant of the actual use of primary health care resources. Only with subgroups of the low-income population (UK women and US relatively unhealthy individuals) does there appear to be a statistically significant effect, which is quite small in comparison to other factors.