In a new policy the company said will help address the gender pay gap that can occur during a lengthy leave, it will also be offering four weeks of return-to-work payments and 10 days of secondary carer leave. All are available regardless of gender.

KCGM will continue to offer employees family-friendly flexible work arrangements when they return to work, officials added, along with 10 days of paid domestic violence leave and financial support to affected employees who are victims of violence.

Under the parental benefits package, superannuation and long service leave accruals will be paid on return to work, and both primary and secondary carers will qualify.

Additionally, people in de facto relationships, regardless of diversity of sex or gender, will be eligible, and a graduated return-to-work on full pay and return to work incentive payment has been included.

The changes were announced this week at an event held at the Mount Charlotte underground mine's Cassidy Headframe in Western Australia, attended by KCGM's Parental Support business resource group (BRG).

"The Parental Support BRG's mission is to improve parental support for all employees. We also work with those currently on parental leave to assist them in staying connected with the business and ensure a smooth transition back to work," KCGM's BRG team leader Julia Rowatt said.

"We're thrilled that KCGM has become an industry leader in parental and other leave needs."

KCGM is owner of the Super Pit gold property outside Kalgoorlie, Western Australia.