Shrinkflation Pushes Half of Australian Grocery Shoppers to Switch Brands

Eighty-five per cent of Australian grocery shoppers have noticed shrinkflation on supermarket shelves, driving half of them to seek out competitor brands when pack sizes shrink.

The findings from the 2026 Australian Grocery Shopper Report show that reducing pack volumes rather than raising shelf prices carries immediate commercial risks for FMCG manufacturers. Overall price remains a decisive factor for six in 10 shoppers, but consumers now weigh cost directly against product volume, quality, and ingredient integrity.

The cost of breaking consumer habits

Consumer tolerance for stealth volume cuts has eroded sharply across grocery aisles. Focus Insights found that 60 per cent of shoppers do not believe packaged goods companies are transparent about size adjustments. When presented with the choice between a price increase or fewer biscuits in a pack, 59 per cent preferred the product to stay at its original size.

Downsizing familiar products breaks repeat purchasing cycles. One in two consumers surveyed said they actively seek alternatives if a favourite item shrinks. One in three said they purchase the downsized product less often, and one in five said they stop buying the product altogether.

The promotional trap for FMCG brands

Price discounting adds another layer of margin pressure across the category. Nine in 10 shoppers said price promotions influence what they place in their baskets, with 57 per cent stating discounts almost always dictate their purchases. Frequent discounting cycles have conditioned 67 per cent of shoppers to defer purchases until products go on sale rather than pay full shelf price.

For retailers and consumer packaged goods brands across Asia-Pacific markets, managing rising input costs requires explicit communication on shelf. Quietly trimming product weights threatens core volume share in high-frequency categories where private label substitutes are readily accessible.

Focus Insights chief executive Deane Hubball and Believe You Me founder Blair Triplett will present the detailed category breakdowns and shopper sentiment data at industry briefings in Melbourne and Sydney next month.