Aims: To compare acute hospital length of stay and cost-savings for patients with hip fracture before and after commencement of the Orthopaedic Nurse Practitioner and identify variables that increase length of stay in hospital. Background: Globally, hip fractures are associated with significant morbidity and mortality. Whilst the practical benefits of the Orthopaedic Nurse Practitioner have been anecdotally shown, an analysis showing the cost-saving benefits has yet to be published. Design: A retrospective cohort study. Methods: Data from two population-based cohorts (2010, 2013) of hip fracture patients aged ≥65 years were extracted from the electronic hospital database at a large Western Australian tertiary metropolitan hospital. Multivariate linear regression was used to model factors affecting length of stay in hospital. A simple economic analysis was undertaken and cost-savings were estimated. Results: For comparison (n = 354) and intervention (n = 301) groups, average age was 84 years and over 70% were female. Analyses showed length of stay was shorter in 2013 compared with 2010 (4.4–5.3 days). Shorter length of stay was associated with type of procedure and surgery within 24-hr and longer length of stay was associated with co-morbid conditions of pulmonary disease, congestive heart failure, dementia, anaemia on admission and complications of delirium, urinary tract infection, myocardial infarction and pneumonia. The cost-savings to the hospital over one year was $354,483 and the net annual cost-savings per patient was $1,178. Conclusion: Implementation of the Orthopaedic Nurse Practitioner role for care of hip fracture patients can reduce acute hospital length of stay resulting in important cost-savings.