Timing of physiotherapy intervention (PT) can prove critical in the successful management of pain and function and at times the correct timescales can be unclear. The purpose of this study was to compare clinical outcomes of patients receiving early or later PT services with those not receiving PT among older adults presenting to primary care for a new visit for back pain. This was performed by using a prospective cohort design utilising the Back Pain Outcomes Longitudinal Data registry. 3,705 adults 65 years and older with a new visit for back pain were included and assessed with the Roland-Morris Disability Questionnaire (RMDQ), Pain Numerical Rating Scales, and EuroQol-5D. Two phases of PT timing were used: early (0-28 days) and later (3-6 months). The early PT group had better functional status with an adjusted mean RMDQ of 1.1 points less than the no early PT group (95% confidence interval: -2.2, -0.1) and less back pain of -0.5 (-0.9, -0.1) at 12 months. There was no difference between early PT groups at 3 and 6 months. The odds of a 30% improvement in function or pain were not different between these matched groups at 12 months, but the early PT group had increased odds of a 50% improvement in function at 12 months (odds ratio: 1.58, 95% confidence interval: 1.04, 2.40). There was no difference between later groups at 12 months. Greater dose of PT use within the early PT group was associated with better functional status (p= .01).