The Loyalty Edge: How UK Grocers Win Repeat Customers

The UK grocery retail landscape has become increasingly defined by the prominence of member-only pricing, as retailers seek to deepen loyalty participation and reinforce perceptions of value amid a highly constrained macroeconomic backdrop marked by the rising cost of living and skyrocketing energy prices. In parallel, these loyalty ecosystems are evolving into powerful first-party data engines, providing the foundation for more sophisticated, highly personalised customer engagement.

Dominating the aisles: Tesco and Sainsbury’s market grip

The UK grocery loyalty market is characterised by relatively strong customer engagement, with member participation reaching 50% in 2025, according to the Euromonitor Voice of the Consumer: Loyalty Survey, fielded March to April 2025 (n=20,072). However, this widespread adoption is tempered by high switching behaviour, as consumers frequently move between retailers chasing the most competitive offers, with per capita spending on food projected at USD2,586 (constant 2025 prices) for 2026 in the UK.

Power is concentrated in the hands of a few major players who have harnessed advanced AI and data analytics as part of their loyalty programmes to broaden offerings and shift away from reliance on generic price-based promotions such as discounts and coupons.

In fact, digital transformation has emerged as a central focus for these players, enabling them to deliver highly customised propositions that differentiate their loyalty offerings and drive stronger customer retention. In 2025, loyalty programmes were a critical driver of repeat online traffic for UK grocery retailers. Sainsbury’s Nectar programme and Tesco’s Clubcard programme contributed a substantial share of all site visits, boosting customer engagement and reinforcing their competitive advantage. In 2025, Tesco’s loyalty website attracted 11.8 million unique visitors, with Sainsbury’s behind at 9.4 million, according to Euromonitor International via Semrush, highlighting the massive scale of digital engagement in the highly saturated UK grocery sector.

These platforms not only drive repeat visits and targeted promotions but also serve as a critical lever for strengthening customer relationships and unlocking additional lucrative revenue streams such as through retail media. For example, Tesco’s H1 2025/26 results highlight strong growth in its Clubcard loyalty programme, reaching 85% penetration within the group globally, alongside a 25% increase in media revenue driven by its large, engaged customer base and the roll-out of digital screens in its stores.

Harnessing AI for competitive edge

The sector is shifting towards “agentic AI”, in which intelligent agents are expected autonomously to curate complete shopping baskets tailored to individual preferences and budgets, amplifying the value of first-party data collected through loyalty programmes. Retailers are harnessing AI as a proactive competitive defence using advanced analytics to deliver targeted pricing and promotions, creating a barrier that discounters such as Aldi or Lidl, for instance, cannot easily overcome without an equally rich data ecosystem. Players that successfully embed this technology into everyday operations are poised to achieve substantial structural gains in profitability.

Generative tools, from ChatGPT and Google Gemini to new AI shopping assistants, are driving a massive shift in product discovery, funnelling high-intent traffic and raising the stakes for retailers. Tesco dominates AI-driven grocery referrals in 2026 YTD with a 50% share, while Ocado is outperforming its scale at 14%, followed by Sainsbury’s at 12%, Costco at 9% and Asda at 6.8%. These figures underscore how AI is rapidly becoming a decisive factor in how UK consumers discover and select groceries online.

For instance, Tesco’s “Smart Stock” AI tool uses insights from Clubcard transactions to forecast when shoppers are likely to run low on key household items, allowing the retailer to proactively engage customers with personalised offers. Meanwhile, Sainsbury’s is enhancing its personalisation strategy with machine learning by creating two distinct but interconnected parts: the customer-facing Nectar scheme and the Nectar360 Pollen, its retail media arm. Introduced in late 2025, Pollen leverages AI to redefine how to better engage shoppers, enabling better real-time campaign optimisation across the retail ecosystem.

Another way AI is being harnessed is through gamification, where interactive challenges are used as tactics to increase shopping frequency or adopt healthier purchasing habits. Retailers such as Morrisons, Asda and Lidl are increasingly adopting gamification and AI-driven features to enhance engagement. Lidl app gamified features like “spin the wheel” offer shoppers the chance to win free items with every transaction, while Asda Missions help generate bonus cash for members.

To learn more about loyalty programmes, explore our comprehensive Loyalty page on our website.