The Green Party is promising one of the biggest shake-ups of New Zealand’s supermarket sector in decades, unveiling plans to force the country’s dominant grocery groups to sell stores and distribution capacity to establish a new publicly owned competitor called KiwiMart.
The proposal is the centrepiece of the Greens’ new Affordable Kai election policy, which combines supermarket restructuring with tougher price-gouging rules, greater powers for the Commerce Commission, expanded school lunches and hundreds of millions of dollars for community food security.
Under the plan, at least 120 existing stores and capacity from two distribution centres would be transferred into public ownership, creating KiwiMart as a nationwide competitor to the supermarket businesses controlled by Foodstuffs and Woolworths.
KiwiMart takes aim at the duopoly
Green Party co-leader Chlöe Swarbrick says successive governments have talked about increasing grocery competition without succeeding in attracting a major third supermarket operator.
The Greens now want the Government itself to become that competitor.
KiwiMart would operate commercially but have an explicit mandate to prioritise affordability.
The party estimates acquiring 120 stores and two distribution centres would cost about $1.3 billion, with another $1.5 billion required to capitalise KiwiMart as a commercially viable supermarket business.
That puts the initial KiwiMart investment at around $2.8 billion.
The wider Affordable Kai package, including food security and school lunch commitments, is expected to cost more than $6 billion over four years.
Not just another supermarket
The proposal is significantly more interventionist than simply encouraging an overseas supermarket chain to enter New Zealand.
The Greens want the Commerce Commission involved in identifying stores for divestment based on factors including local market share, with fair compensation paid to their existing owners.
The party is pitching KiwiMart as something similar in principle to Kiwibank — a publicly owned commercial operator intended to introduce competitive pressure into a highly concentrated market.
That comparison will inevitably become part of the election debate.
Supporters will argue a publicly backed entrant could finally overcome the huge barriers facing new supermarket competitors, including land, distribution infrastructure and access to wholesale products.
Opponents are likely to question why taxpayers should carry the commercial risks associated with owning and operating a national supermarket chain.
Competition problem has not disappeared
The Greens’ policy arrives against a backdrop of continuing concern from the Commerce Commission about the structure of New Zealand’s grocery market.
Its June 2026 annual grocery report found the major supermarket operators continued to hold more than 80 percent of the national retail grocery market, while retail prices had increased and significant improvements in competition had yet to emerge.
The Commission has also raised concerns about the relationship between supermarkets and suppliers.
In July it said it was prioritising investigations into rebates, discounts and other payments charged to suppliers, warning that some practices can make it harder for smaller and emerging grocery retailers to compete with the established supermarket groups.
That gives the supermarket debate particular relevance for small food producers and potentially Māori-owned businesses trying to get products onto shelves.
Price gouging also in the firing line
KiwiMart is only one component of the Greens’ grocery offensive.
The party also wants to ban excessive supermarket pricing, extending the proposed prohibition to other concentrated markets including energy and fuel.
It would increase funding and powers for the Commerce Commission, strengthen penalties under competition law and introduce a mandatory supermarket pricing accuracy code.
Under that proposal, shoppers who are overcharged would be entitled to automatic compensation.
The Greens also want consumers given greater control over the shopping and loyalty-card data collected about them.
$150 million a year for food security
The policy extends beyond the checkout.
The Greens are proposing a $150 million-a-year Fair Food Fund supporting community-led food security initiatives.
Funding for food banks and regional food distribution would also increase, while the cap on Work and Income food grants would be doubled.
That could have particular significance for Māori communities where marae, Māori organisations, social supermarkets and community providers are already responding to food insecurity.
Rather than treating emergency food support solely as a welfare issue, the Greens are positioning access to nutritious kai as part of a wider national food system.
The party also wants a National Food Strategy and a legislated right to adequate and nutritious food.
School lunches back on the election menu
The Greens are also promising to restore and permanently fund Ka Ora, Ka Ako, while expanding access to another 150,000 children.
That component alone is estimated at around $2.2 billion over four years.
Co-leader Marama Davidson is linking the supermarket debate directly with child poverty and food insecurity, arguing that the consequences of expensive food are being experienced in classrooms and homes around Aotearoa.
For many whānau, grocery inflation is not an abstract economic indicator.
It determines what goes into the trolley, what gets removed at the checkout and, in the hardest cases, whether there is enough kai to last until the next payday.
A major Election 2026 dividing line
KiwiMart ensures supermarket competition will now be a significant battleground heading towards Election 2026.
There is already broad political recognition that New Zealand’s grocery market suffers from inadequate competition.
The disagreement is increasingly about how far government should go to fix it.
The Greens are now proposing the most direct answer possible — if the private market cannot produce a genuine third competitor, create a public one.
It is a bold proposition.
It is also an expensive one.
And forcing the divestment of existing supermarket assets into a publicly owned competitor would guarantee an intense argument over property rights, competition, government intervention and whether taxpayers should own supermarkets.
But for households struggling every week with the grocery bill, the political test may be considerably simpler.
Will it make the food in their trolley cheaper?
That is the question KiwiMart will ultimately have to answer.
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