Background Computed Tomography (CT) is a critical imaging modality in modern trauma care. Time to CT is used as a surrogate quality indicator for trauma care. The Australasian Triage Scale (ATS) is a clinical triage tool used in emergency departments to establish the maximum waiting time for medical assessment and treatment of a patient. The relationship between time to CT and ATS has not yet been investigated. Methods Data from the Western Australian trauma registry was collected between 01 September 2021 and 31 August 2022. Patient details, injury details, time to CT, ATS, hospital admission details, and in-hospital mortality were collected and analysed using multivariate regression modelling. Results Data on 621 patients were collected. Median age was 50 years and 75% of patients were male. Nearly half of the cohort was triaged as ATS category 1. Higher ATS triage category was associated with shorter time to CT. Male patients had a shorter time to CT as compared to female patients. Time to CT was not associated with reductions in mortality. Conclusion Higher ATS triage category is associated with shorter time to CT. Female patients have longer time to CT than male patients. To further optimise the best allocation of resources, future studies may consider stratifying time to CT by injury to see which patient cohorts are most likely to benefit from expedited time to CT.