Your defined benefit account

You may automatically receive a defined benefit account if you’re employed in the Western Australian coal mining industry and are likely to remain employed as a mine worker for at least six months.

If your work is temporary or casual, you'll receive an accumulation account and this information won't apply to you.

How to calculate your retirement saving amount

Having a defined benefit account means the amount of super you retire with isn’t determined by investment returns, but by using the following formula*:

12% x years of defined benefit membership x benchmark amount.

The benchmark amount, which is $68,313 as at 1 July 2017, is indexed each year with increases in Average Weekly Ordinary Time Earnings. This means your super is largely protected against the effects of inflation.

Your retirement savings increase as your length of membership and the benchmark amount increase.

Once you reach age 65 your membership multiple stops increasing and any further contributions are paid into an accumulation account. When you retire you'll be entitled to a defined benefit calculated using your membership multiple at age 65, times the benchmark amount at the date of retirement.

Extra employer contributions

Your employer contributes between 7% and 10% of the benchmark amount to your defined benefit account. Currently your employer is contributing 8.5% of the benchmark amount.

By law, employers must make Super Guarantee contributions of 9.5% of your salary to your super account. If the defined benefit contribution is less than the Super Guarantee, your employer will pay the extra contribution into an accumulation account with Mine Wealth + Wellbeing or another super fund you choose that's listed in your Award.

Your contributions

You have to pay 3% of the benchmark amount until you turn 65. This contribution is automatically paid from your salary.


The cost of your defined benefit account are built into your employer’s contribution rate.

*This formula takes into account your insurance costs.