• results in the member being totally and permanently unable to engage in work they are suited to by any combination of experience, education, or training, or any combination of those things; or
• poses a serious and imminent risk of death.
"In a nutshell, the supervisor must be reasonably satisfied that the member is suffering from serious illness as defined above," says Thomas.
Applications normally require supporting medical evidence.
If approved, you can withdraw all or part of the total balance, including member, employer and Government contributions.
A key difficulty in applying the test is that it is more stringent than the insurance-type test on which it seems to be based, says Thomas.
A policy change would be needed to refine the current serious illness test, which is being looked at by the industry body Workplace Savings NZ and the Ministry of Business Innovation and Employment.
There is also a complaints process for KiwiSaver issues if you're unhappy with withdrawal decisions.
Initially, contact your provider, but if you aren't making headway or aren't satisfied with their response you can take it to an independent disputes resolution service.
More detail can be found at: kiwisaver.govt.nz/providers/about/complaints/ks-complain.html