A comprehensive case study in 2006 by Gartner, a Connecticut-based market research firm, of over 1,000 workers from Sun Microsystems over a five-year period revealed the following benefits of a formal mentoring program.
- 25% of employees who enrolled in a mentoring program had a positive salary-grade change, while only 5% of workers who did not participate in a mentoring program had a change.
- Mentors were promoted six times more often than those who did not mentor formally.
- Mentorees were promoted five times more often than those who were not formally mentored.
- Retention rates were higher for both mentorees (72%) and mentors (69%) than for employees who did not participate in a mentoring program.