Consumer NZ says inaccurate pricing and misleading specials could collectively cost customers millions of dollars.

The Commerce Commission has filed criminal charges against Woolworths NZ and two individual Pak’n Saves - accusing them of breaching the Fair Trading Act. 

It says investigations are ongoing. 

Consumer chief executive Jon Duffy says minor amounts for individual shoppers are significant when it's nationwide and happening every day. 

"If every shopper's going to one of the other supermarkets that's been charged 50 cents extra that they shouldn't have been charged for their baked beans - actually, that really adds up."

LISTEN ABOVE

• Supermarkets face criminal charges over alleged inaccurate pricing, misleading specials
• Consumer NZ executive breaks down commission investigation into supermarket practice
• Dodgy supermarket 'specials': Calls for Comm Comm to investigate