Countdown's price freeze began today with 500 "essential" items to stay at the same price over winter.
Some consumers have expressed disappointment at the lack of fresh produce, dairy and meat on the list.
They say with prices at an all time high the freeze doesn't go far enough. So how much will shoppers really save?
Or is it cheaper to shop elsewhere? And how do prices compare to Australia?
In a statement Countdown said it would love to freeze the price of more fruit, veges, meat and dairy but they are more susceptible to seasonal conditions and global export prices.
It says there are 640 items and when it can, it will look to add more items to the winter freeze.
How to the prices compare in Australia?
Countdown is a subsidiary of Woolworths, which last week promised price cuts on more than 300 seasonal staples for Australian shoppers.
Checkpoint's Australia correspondent Penny Sheffield went to a Woolworths supermarket in Sydney to do the same shop as our reporter Louise Ternouth in Auckland.
Louise's Countdown shop was NZ$238.
Penny's bill in New Zealand dollars for 36 items was just under NZ$202 - almost $40 cheaper than our Auckland shop.
