Adding together wages, family tax credit and accommodation supplement, Catherine pockets $825 a week.
But after paying $530 a week rent for her modest three-bedroom Takanini home, and forking out another $206 for essential household and transport costs, she's left with just $89 to feed herself and her three primary school age children.
Catherine doesn't have any insurances and all one-off costs such as repairs, health costs or clothes also have to come out of the $89.
Catherine says working in a local primary school means she's got to know many other parents who are in a similar or worse situation.
"There are families where they just don't have breakfast or they won't have eaten any food for lunch either.
"Most of the families are in a similar situation to mine. We're [coming up] short but it hasn't come about in a silly way, it's because they've come into a bill or need to pay for medicine for a child.
"Most parents in this community are not wasting their money.
"They are actually trying to better their own lives, their kids' lives, their families' lives.