The number of women resigning from the charity sector has more than doubled since last year despite women achieving promotions at a faster rate than their male counterparts, according to the Chartered Management Institute.

The Institute’s National Management Salary Survey of 42,205 people found that resignation rates among women in the charity sector stood at 9.7%, up from 4% in 2006. Resignation rates among men stood at 2.4%.

The survey also found that the average female team leader is five years younger than her male counterpart, while female department heads were three years younger on average. Women also achieve director roles at a younger age than men; 44 as opposed to 48.

However, female earnings in the sector only increased by 3.9%, compared to 6.3% for men, which the Institute said was the first time in 11 years that male earnings have grown at a faster rate than female.

Commenting on the findings, Jo Causon, director, marketing and corporate affairs at the Institute said: “It is clear that the pull of promotion is not being matched by parity in pay. Despite the weight of legislation and the reality that reward should match responsibility, gender bias seems to be getting worse, not better.”