This statistic shows the average length of a clinical trial cycle from 2020 to 2024, in months. The data is based on the top 20 biopharma companies by R&D spend. As can be seen, the average length of trials increased, with a peak of over 100 months in 2024.
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Deloitte. (March 27, 2025). Average length of a clinical trial cycle from 2020 to 2024 (in months) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 24, 2026, from /statistics/1419920/biopharma-clinical-trial-cycle-time/
Deloitte. "Average length of a clinical trial cycle from 2020 to 2024 (in months)." Chart. March 27, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 24, 2026. /statistics/1419920/biopharma-clinical-trial-cycle-time/
Deloitte. (2025). Average length of a clinical trial cycle from 2020 to 2024 (in months). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 24, 2026. /statistics/1419920/biopharma-clinical-trial-cycle-time/
Deloitte. "Average Length of a Clinical Trial Cycle from 2020 to 2024 (in Months)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 27 Mar 2025, /statistics/1419920/biopharma-clinical-trial-cycle-time/
Deloitte, Average length of a clinical trial cycle from 2020 to 2024 (in months) ÌÇÐÄÆƽâ°æ, /statistics/1419920/biopharma-clinical-trial-cycle-time/ (last visited July 24, 2026)
Average length of a clinical trial cycle from 2020 to 2024 (in months) [Graph], Deloitte, March 27, 2025. [Online]. Available: /statistics/1419920/biopharma-clinical-trial-cycle-time/
