How does a family suddenly find an extra $3,000 for groceries? They don't. They just stop spending on other things.

While RNZ reports households are freezing their spending on everything from clothes to entertainment, the data shows exactly where that money went: into the weekly shop.

The average North Island household spent $15,462 on food in 2024. Four years earlier, in 2020, that figure was $12,590. That's an increase of $2,872. (Source: Stats NZ, food-price-index-regional)

Break that down: it's $55 more every single week. For four years straight.

To understand what that means, think about what $2,872 buys. It's a family holiday to the Gold Coast. It's six months of power bills. It's the deposit on a second-hand car. It's nearly three months of rent in Palmerston North.

Except North Island families didn't get any of those things. They got the same trolley of groceries they always bought, just with a bigger number at the checkout.

The pace of the increase tells its own story. From 2020 to 2021, food spending rose by $340. Barely noticeable. From 2021 to 2022, it jumped by $1,054. That's when people started feeling it. From 2022 to 2023, another $1,322. That's when the panic set in.

Last year, the increase slowed to just $156. The smallest annual rise since the pandemic. But here's the thing: prices didn't fall. They just stopped climbing quite so fast. Families are still spending that extra $55 a week. They're just not watching it climb higher every month.

This is why household spending has gone on ice. It's not a choice. It's mathematics. When your grocery bill takes an extra $2,872 out of your annual budget, something else has to give. New clothes don't get bought. The car repair gets delayed. The weekend away gets cancelled.

The data doesn't show where that $2,872 came from. It doesn't say which line items in the family budget got slashed to pay for milk and bread. But every household in the North Island knows exactly where it came from, because they're the ones who made those cuts.

And here's what makes it harder: this isn't a spike that will reverse. Food prices don't fall back to 2020 levels. That $15,462 is the new baseline. Next year's increase will be measured from there.

So the question isn't really how families spent an extra $3,000 on groceries. The question is: what are they not spending on now, and how long can they keep that up?