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Objective: Robot-assisted radical cystectomy (RARC) is considered the gold-standard for patients who fail Bacillus Calmette–Guérin (BCG) treatment for high-grade non-muscle-invasive bladder cancer. We reviewed our histopathological outcomes to assess whether we are proceeding to cystectomy at an appropriate time. Methods: A retrospective analysis of the RARC database (2015–2020) was performed to identify patients who received intravesical BCG before cystectomy. Data regarding demographics, number of BCG instillations and staging were collected. Histopathological stage at cystectomy was compared between patients who received an induction course of BCG only (group A), and those who had continued maintenance doses (group B). Results: A total of 73 patients (57 males and 16 females) met the final inclusion criteria, with 24 patients in group A and 49 patients in group B. At cystectomy, 19 patients had ⩾T2 disease (group A: 7; group B: 12). There was no significant difference between groups ( p=0.78). Pelvic lymph node dissection was performed in 68 patients, with six patients found to have lymph node metastases. Conclusion: RARC plays a key role in managing BCG failure, considering the number of patients with muscle-invasive disease at final staging. However, prolonged BCG treatment was not associated with more advanced disease in our case series. Thus, persistence with intravesical treatment warrants consideration for selected patients. Level of evidence: Level 4.