Background and purpose. The purpose of the study was to determine the costs incurred on the average length of stay (ALOS) on patients with Human Immunodeficiency Virus (HIV) and Acquired Immune Deficiency Syndrome (AIDS) related illnesses admitted in hospital and whether there are any other significant costs involved. Method. A quantitative approach was used to collect data; analysed; interpretation and report writing. Purposive sampling and data collection was done using data collection sheet. This was a retrospective cost analysis data from in-patients records (record review) of ages from 15 years to 49 years both gender. Data analysis and presentation of information was presented by the use of tables; different types of graphs and the interpretation thereof. Results. The study found that males (63%) with HIV Human Immunodeficiency Virus (HIV) and Acquired Immune Deficiency Syndrome (AIDS) related illnesses had longer average length of stay in a hospital compared to females. However, females illustrated higher in-patient costs but majority of patients had costs of between R0–R17 500. Patients with longer hospital stay (>3 days of hospitalisation) had higher in-patient costs. Conclusion. The findings also showed that in-patient care costs were directly proportional to length of stay with higher costs for HIV and AIDS patient management care. Our findings are consistent with other studies regarding higher economic implications of care for HIV infected persons being almost as twice as people who are HIV negative due to longer periods of hospitalisation. / Health Studies / M.A. (Public Health)