Exactly how long a cosmetology license lasts will vary based on state laws, but two years is common among many states. For example, the Division of Professional Regulation in Delaware states that cosmetology licenses expire on October 31 every even year. So in Delaware, a cosmetology license lasts two years.
The Board of Cosmetology in the state of Tennessee states that a cosmetology license must be renewed every two years; however, unlike Delaware, Tennessee does not renew cosmetology licenses on a specific date. Instead, notices are mailed to the individuals that hold a cosmetology license when it is time for renewal.