So far the experience has opened his eyes to the challenges people with a less lucrative salary face on a daily basis.
He has found that although the minimum wage is enough for basic expenses, it does not cover unexpected costs.
Extra expenses such as the $480 bond for his temporary flat and having to buy pharmaceuticals when he was sick surprised him.
"I can quite easily see now why people end up in that spiral of debt where something happens and they have no choice but to borrow."
Another significant lifestyle change for Mr Mexted-Bragg is bringing sandwiches to work instead of buying lunch everyday.
"In the last 15-16 years I could probably count on my fingers the number of times I had prepared lunch to take to work."
The decision to walk in the shoes of a minimum wage earner came after a friend teased him for complaining about the cost of living in Auckland.
His friend suggested the banker had little to complain about.
Mr Mexted-Bragg estimates the difference in what he would normally save and what he now saves is about $580 a week.
He says the idea of raising the minimum wage to $18.40 is a concept he agrees with and that the current minimum wage allows New Zealanders to survive but not to live.
"Any person who has a job and is working is contributing to New Zealand," he says. "And those people are deserving of a life, not just an existence."
Annie Newman, convener of the Living Wage campaign, says Mr Mexted-Bragg's commitment is part of a growing recognition of poverty in New Zealand.
She invites him to be part of the solution to poverty by supporting the Living Wage movement as a way for ethical employers to show their support for a more just society.
