Greens can't say how much cheaper KiwiMart would be, won't commit to price-setting

The Green Party has confirmed it cannot say how much cheaper groceries would be under its proposed government-owned supermarket chain KiwiMart, with co-leader Chlöe Swarbrick ruling out politicians setting prices directly.

Swarbrick said it would not be up to politicians to determine the price of eggs or any other product if the government entered the grocery market. "Politicians are not economists," she said, arguing that defining excess profits should be left to independent experts at the Commerce Commission. She declined to put a figure on how much cheaper goods could be with a third, government-backed operator mandated to prioritise affordability.

The Greens announced KiwiMart as a government-owned supermarket chain intended as an alternative to the Foodstuffs and Woolworths duopoly that dominates Aotearoa's grocery sector. The plan involves buying 120 existing stores and two distribution centres at a cost of $2.8 billion, immediately introducing a third player with a 15 percent market share. The Parliamentary Library costed the policy at $2.8 billion, comprising the nationalisation of those 120 stores and distribution centres.

Swarbrick said KiwiMart would not be a non-profit operation. After the initial cost outlay, it would be self-sustaining. The co-leaders of the Green Party as of September 2026 are Marama Davidson and Chlöe Swarbrick.

The KiwiMart announcement sits alongside a separate but related piece of Green Party policy: a member's bill and campaign pledge to ban price gouging by New Zealand supermarkets, unveiled in August. Part of the broader plan includes spending more than $100 million on strengthening the Commerce Commission's powers and introducing a mandatory pricing accuracy code with automatic compensation when shoppers are overcharged.

The market context the Greens are responding to is well-established. In June, the supermarket duopoly was reported to hold 82 percent of the New Zealand market, and more than 90 percent in some regions. In 2022, the Commerce Commission found the duopoly was making $1 million in excess profit every day. A month before that report, the Commission took Foodstuffs South Island to court alleging anti-competitive conduct that deprived customers of cheaper prices.

The decision not to commit to a specific price-reduction figure is politically significant for a policy whose central pitch is affordability. A $2.8 billion capital outlay to nationalise existing stores, rather than build new ones, means the Crown would be acquiring incumbent infrastructure and presumably incumbent supply relationships, with the expectation that a publicly owned operator run on commercial (not non-profit) lines would nonetheless exert sufficient downward price pressure to deliver meaningful savings. Swarbrick's argument that independent regulators, not ministers, should determine what counts as excess profit is consistent with the Greens' broader plan to boost Commerce Commission resourcing and enforcement powers. But it also leaves the party unable to answer the most immediate question voters and analysts will ask: what does this cost, and what do I get back at the checkout?

The structure of the proposal, combining direct state entry into the market via KiwiMart with stronger regulatory teeth for the Commerce Commission, amounts to a two-track approach: structural competition through public ownership, and regulatory constraint on the remaining private operators. Whether either track delivers the price reductions the Greens are campaigning on would depend on factors outside their direct control, which is precisely the point Swarbrick was making. The tension is that a policy sold on cheaper groceries cannot quantify the savings on offer, and relies on a self-sustaining commercial entity to undercut two incumbents who have been found to extract a million dollars a day in excess profit. The Commerce Commission's own enforcement history, including the Foodstuffs South Island court action, suggests the regulatory track alone has been insufficient to shift that dynamic. Whether public ownership changes it is the proposition the Greens are putting to voters.