The assessment of a marketing authorisation application for a new medicine takes up to 210 ‘active’ days. This active evaluation time is the time spent by EMA experts to evaluate the evidence provided by the applicant in support of a marketing authorisation application.
This time is interrupted by one or two ‘clock-stops’ during which the applicant prepares the answers to any questions raised by the CHMP. The maximum duration of a clock-stop depend on how long the applicant thinks it will take to respond, but must be agreed by the CHMP. The first clock-stop usually lasts 3 to 6 months and the second one 1 to 3 months.
Overall, the assessment of a new medicine usually lasts around a year.
https://www.ema.europa.eu/en/human-regulatory/marketing-auth...