UPSC does not publish the precise number of boards operating on any single day as official policy, and the figure varies across the interview season depending on the number of candidates to be covered.

Multiple coaching and analysis platforms — drawing on candidate feedback and publicly available schedules — report that between 6 and 10 boards typically sit simultaneously during peak interview days. Each board is independent and operates in a separate room at the UPSC headquarters on Shahjahan Road, New Delhi.

For the Civil Services Examination 2024 cycle, 2,845 candidates were interviewed across roughly 70 working days (7 January to 17 April 2025), which arithmetically suggests several boards were needed to clear that volume within the available time. For the CSE 2025 cycle, 2,736 candidates were shortlisted for interview (December 2025 to February 2026). The exact number of boards on any specific day is not disclosed in advance to candidates or the public.