The Legislation which came into force in 2017 required companies with more than 250 employees to publish data about their gender pay gap.
It requires that the following calculations must be evidenced:
The media and mean gender pay gap
The median and mean bonus gender pay gap
The portion of males and females receiving a bonus payment
The proportion of males and females in each quartile pay band
Median and mean are both types of average. The median is the middle value if you place all the numbers you are looking at in order. The mean is the total of all the numbers, divided by how many numbers there are.
The quartile pay bands are calculated by putting everyone’s salary in order from the highest paid to the lowest. That list is then cut into four equal parts and the percentage of men and women in each part is then shown.