[Purpose] Cancer survivors have functional impairments that adversely affect patients’ quality of life (QoL). Acute rehabilitation helps to reduce disability and improves QoL in cancer survivors. This study investigated the potential improvement in mobility levels and QoL of cancer patients during acute inpatient physical therapy (PT) from admission to discharge. [Participants and Methods] This was a cross-sectional study conducted at King Fahad Medical City, Riyadh. Acute inpatient cancer survivors (n=99) were assessed at their admission and discharge. The primary outcome measure was the AM-PAC “6-Clicks” Basic Mobility, Functional Assessment of Cancer Therapy-General (FACT-G7) and the Karnofsky Performance Scale (KPS). [Results] Overall, 82.8% of cancer patients were discharged home. There were significant improvements in all the three outcome measures for all the patients from admission to discharge. Patients who were discharged home exhibited significantly better improvement in all the scales. Factors that predicted discharge mobility and quality of life were discharge destination, number of PT sessions, and baseline admission scores. [Conclusion] The study found that acute inpatient cancer rehabilitation helps to improve mobility and QoL. Rehabilitation programs available in Saudi Arabia are limited, and it is important to integrate the cancer rehabilitation model into the oncology services.