Individual pelvic floor muscle training (PFMT) is recommended for stress or mixed urinary incontinence in women, but its use is limited by cost and resources. The Group Rehabilitation or Individual Physiotherapy (GROUP) study included 362 women aged ≥60 years with symptoms of stress or mixed urinary incontinence who, after an individual session in which they learnt how to contract the pelvic floor muscles, completed 12-week PFMT either as a group of 8 women (n = 178) or individually (n = 184). At 1 year, median percentage reduction in urinary incontinence episodes was 70% in women receiving individual PFMT versus 74% in those taking part in group-based PFMT. Use of group-based PFMT in clinical practice could help increase affordability and treatment availability for women with incontinence.