A Consumer New Zealand survey found the price varies from $6.40 to $19 dollars a test.
In Australia, it's illegal to sell them for more than a 20 percent mark-up.
Pharmacy Guild chief executive, Andrew Gaudin, told Mike Hosking competition laws mean it's up to independent retailers where they set their price point.
“We'd expect in this market, being a public good that most will set a fair and reasonable price and we think that the monitoring that’s being done is a good thing.”
People with symptoms or household contacts can also access free tests at testing stations or, from today, on the Ministry of Health RAT requester website.
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