In the sciences after tenure, you have to bring in grant funding to keep your lab running and your postdocs and students paid. Summer salaries for faculty and t

In the sciences after tenure, you have to bring in grant funding to keep your lab running and your postdocs and students paid. Summer salaries for faculty and teaching load reductions are funded from faculty grants as well. While conditions of tenure vary from university to university, there are institutions where tenured faculty could give up all research and retain their jobs, but they will never get promoted beyond associate professor, get a raise, etc.