Everyone talks about Auckland rents and Wellington mortgages. But if you live in Timaru, Invercargill, or Queenstown, you already know: your grocery bill is climbing faster than almost anywhere else in New Zealand.

The average household in the rest of the South Island now spends $15,380 a year on food. That's up from $12,464 in 2020. In four years, groceries got 23% more expensive in towns and regions most people assume are cheaper to live in (Source: Stats NZ, food-price-index-regional).

Break that down: it's $296 a week. For a family buying milk, bread, meat, and vegetables in a place without competition between supermarkets, without cheaper alternatives, without the bulk-buy warehouses that city dwellers take for granted.

And it's accelerating. Between 2020 and 2021, the increase was modest: $311 for the year. Between 2023 and 2024, it jumped $248 in just 12 months. The curve isn't flattening. It's steepening.

This isn't an Auckland story. Auckland has options. This is a story about regions where one Pak'nSave serves three towns, where "shopping around" means a 40-minute drive, where the delivery truck comes twice a week and you pay whatever price is on the shelf.

The rest of the South Island includes everywhere from Nelson to Gore, from Oamaru to Wanaka. Tourism hotspots where workers can't afford to eat. Farming towns where the people feeding the country are struggling to feed themselves. Retirement communities on fixed incomes watching their grocery money evaporate.

Since 1999, food costs in this region have climbed steadily. But the last four years have been brutal. The post-COVID supply chain chaos. The fuel price spike. The global food inflation wave. All of it hit harder in places where margins were already thin and alternatives were already scarce.

At $296 a week, groceries are now the second-biggest household expense for many families in these regions, right behind rent or mortgage. That's more than power. More than petrol. More than insurance.

And here's what nobody's saying: it's only going to get worse. Food inflation hasn't stopped. Freight costs haven't come down. The supermarket duopoly isn't getting more competitive. The regions that can least afford it are bearing the biggest increases.

So next time someone tells you the cost of living crisis is an Auckland problem, show them this number: $15,380. That's what it costs to eat in the parts of New Zealand we tell ourselves are affordable.