Brand penetration drives sustainable growth by reaching more buyers, while loyalty alone can limit a brand’s growth potential.
For years, brand loyalty has been treated as one of the clearest signs that a brand is doing something right. Marketers have invested heavily in loyalty programmes, personalised offers and strategies designed to make existing customers buy more often. These efforts have value, but they can also create a misleading picture of what actually drives growth.
Brand Penetration, or the proportion of category buyers who buy a brand, shifts the focus to a much simpler question: how many people are buying us? Research across categories increasingly suggests that expanding this buyer base is more closely associated with market share growth than simply increasing purchase frequency among existing customers.
Why Brand Penetration Is a Stronger Growth Lever
The distinction matters because a brand cannot grow indefinitely by asking the same customers to buy more. There is a natural ceiling to purchase frequency. A customer who already buys a product regularly has limited room to increase that behaviour. Finding another customer, however, creates an entirely new source of demand.
This is closely connected to the Double Jeopardy pattern identified in decades of buyer behaviour research. Smaller brands tend to have fewer buyers, and those buyers also purchase them less frequently. Larger brands, by contrast, tend to have both more buyers and somewhat higher purchase frequency. In other words, loyalty often appears alongside scale rather than existing as a completely separate route to achieving it.
Recent research reinforces the point. A 2024 study by Bruce Clark, analysing brand data across 263 brand pairs in 36 countries, found that changes in penetration had a consistently strong positive relationship with changes in market share. Loyalty also had a positive relationship, but it was smaller. That does not make loyalty irrelevant. It simply puts its role into perspective.
The China FMCG market offers another useful illustration. Worldpanel by Numerator analysed 11.6 million purchase occasions across 1,200 brands and 93 FMCG categories and found that more than nine out of ten growing brands increased the number of shoppers buying them. The finding held across different brand sizes, suggesting that winning more buyers is not only a strategy for challenger brands. Even established brands need to keep recruiting.
Also read: Why Decision Confidence Matters More Than Choice
This is where the idea of light buyers becomes important. Consumers do not necessarily buy only one brand within a category. They move between brands depending on availability, occasion, price, habit, and what comes to mind at the moment of purchase. A customer who buys your brand once or twice a year may not look like an ideal customer in a traditional loyalty dashboard, but thousands or millions of such buyers can represent a significant part of a brand’s business. Kantar’s analysis of 200 FMCG categories in the UK similarly found that focusing exclusively on heavy buyers would overlook a substantial portion of category spending.
That changes how marketers should think about growth. Instead of asking only, “How do we make our existing customers more loyal?”, the better question may be, “How do we make our brand easier for more people to notice, remember and buy?”
This means investing in broad reach, strong brand salience and physical or digital availability. Worldpanel’s China research points to awareness and distribution as important drivers of penetration, while the Ehrenberg-Bass approach places emphasis on mental and physical availability: being easy to think of and easy to buy.
None of this means brands should abandon loyalty. Retaining valuable customers, delivering a good experience, and encouraging repeat purchase still matter. Kantar’s research, for example, found that stronger brand affinity can increase the likelihood of repeat purchasing, showing that emotional connection has a meaningful role to play.
The real lesson is about priorities. Loyalty can help protect and deepen the value of an existing customer base, but Brand Penetration creates the opportunity to build that base in the first place. A brand loved by a small group may have strong relationships, but a brand chosen by many has greater room to grow. For marketers, that means the ambition should not simply be to create more loyal customers. It should be to become relevant, available, and memorable to more buyers.
