For the most part yearly, but they are barely above the inflation rate when they do happen. Promotions can also happen occasionally but for developers there's only 4 levels before hitting the glass ceiling before management levels.
Answered - Senior Software Developer (Current Employee) - Tuscaloosa, AL
Usually raises are given once a year.
Answered - Irrigation Technician (Former Employee) - Tuscaloosa, AL
Seldom if ever.
Answered - Lead Radiation Therapist (Former Employee) - Birmingham, AL
Raises may occur if the department gets funding that year.
Answered - Math Tutor (Current Employee) - Tuscaloosa, AL
They do not occur
Answered - Graduate Research Assistant (Former Employee) - Tuscaloosa, AL
Raises Occurred once a year
Answered - Office Associate II (Current Employee) - Tuscaloosa, AL