Eventually, if management thinks they can find someone cheaper to do your job, or at least try to do your job, you'll no longer receive raises in the hopes you'll willingly look for employment elsewhere.
2% annual raises
Answered - Software Developer (Former Employee) - Broomfield, CO
Bare minimum once a year.
Every 3-6 months
Answered - Assistant to Manager (Former Employee) - Fort Lauderdale, FL