Upside’s latest Income Divide Report puts forward a clear proposition. Consumer spend has not disappeared, but it has split.
Lower-income households are pulling back more sharply. Higher-income households are still spending, but with more scrutiny and less consistency.
That view is based on Upside’s analysis of more than 10 billion transactions across grocery, fuel and dining in the United States.
This builds on the earlier question of whether the list is now doing the heavy lifting, and takes it a step further. What happens when the list itself starts to fragment?
The relevance for New Zealand is not in taking that conclusion at face value.
It is in asking whether the same pattern is emerging here, and if so, how it shows up in a market with very different structural dynamics.
A useful lens, not a direct translation
Upside describes a “K-shaped” consumer, where average spend masks diverging behaviour underneath. That is a useful way to think about what many operators are seeing.
Spend has not dropped away in a straight line. Some customers are clearly under pressure. Others are still active, but are making more deliberate choices.
That direction broadly aligns with local conditions. Food prices in New Zealand have continued to rise through 2025 and into 2026, keeping pressure on household budgets and forcing more considered purchasing decisions.
Where the comparison becomes less straightforward is in how that behaviour plays out at retail level.
The United States market that Upside draws from is highly fragmented. Shoppers move across multiple retailers and formats with relative ease. In New Zealand, the Foodstuffs and Woolworths NZ structure creates a tighter environment. Switching still happens, but within a narrower field.
That raises a question rather than providing an answer.
What does “divided” behaviour actually look like in a duopoly market?
Is the shopper becoming less predictable, or just more disciplined?
One of the stronger themes in the report is the idea of the “uncommitted” shopper, moving between retailers and brands based on price, timing and convenience.
The local question is whether that behaviour is increasing in the same way, or whether it is showing up differently.
Are shoppers switching stores more often, or are they adjusting within the same store?
- Smaller baskets rather than fewer visits
- Greater reliance on known value lines
- More selective trading up rather than consistent premium spend
The distinction matters.
If switching is increasing, then range decisions carry more risk. Removing a product or narrowing a category could push the shop elsewhere.
If the behaviour is more contained, then the pressure sits inside the store, in how price architecture and range balance are managed.
Value is not carrying one meaning
Another point raised in the report is that value is not being defined in the same way across income groups.
For lower income households, price is acting as the primary gatekeeper. For higher income households, value appears to be more layered, with availability, quality, convenience and loyalty also influencing decisions.
That feels relevant to New Zealand, but it should not be treated as a direct match. The local question is whether value is becoming more segmented here too.
Are some shoppers preserving cash flow while others are still prepared to trade up, provided the product earns the spend?
Where this becomes commercially relevant
Rather than treating the report as a set of conclusions, it is more useful to treat it as a set of prompts.
- Are entry price points doing more of the volume work than they were 12 to 24 months ago
- Is premium still holding, but only where the value case is clear
- Are promotions driving incremental trips, or simply shifting spend within the same basket
- When a product is out of stock, is it being substituted, or is the sale being lost
These are not theoretical questions. They sit directly inside range reviews, promotional planning and supplier discussions.
The Upside data suggests the answers are shifting. The New Zealand market needs to determine how far.
A second angle: where the spend is going
There is another layer worth considering.
In a fragmented US market, shifting behaviour often shows up as movement between retailers. In New Zealand, the same pressure may present differently.
It may not always be about switching between supermarket banners. It could be about splitting spend across different channels altogether.
Supermarkets, direct-to-consumer, specialty retail, and foodservice are all competing for a share of the same constrained wallet.
If that is the case, then the competitive set is wider than it appears when looking only at supermarket share.
The position from here
This report does not define the New Zealand shopper, but what it does offer is a framework to test against.
Spend may still be there, but it is being allocated more carefully. Loyalty may still exist, but it is being applied more selectively.
For operators, the task is not to adopt the narrative. It is to interrogate it against their own data.
Because if the shopper is becoming harder to read, the impact will not show up in a headline. It will show up in the decisions being made on range, pricing and availability, one category at a time.
