The Labour Party wants to make employers release details about pay levels of women staff compared to men under its new policy to redress pay inequity.
Companies could also be made to report on the number of women and the level at which they are employed in a bid to increase the numbers of women in leadership positions.
The policy was released today to mark Women's Suffrage Day.
Women's Affairs spokeswoman Carol Beaumont said there was a 12 per cent pay gap in the average hourly earnings of men and women. Women also tended to be concentrated in low-paid jobs and there were far fewer in leadership positions.
She said pay levels were "opaque" and there was little way of knowing whether those who worked in the same job were on comparable wages.