Castles Technology, the France-headquartered manufacturer of Android-based point-of-sale terminals, has published a whitepaper arguing that UK merchants now judge POS providers on integration depth, deployment speed and lifecycle support rather than on payment acceptance capability alone. The report, titled ‘The UK Merchant Payments Market’, draws on data from the Payments Association and the Payment Systems Regulator to map how merchant expectations have shifted across business size and vertical sector.

The central contention is that contactless and mobile wallet acceptance has become a baseline rather than a differentiator. Around 90% of UK merchants already support mobile wallets, according to the Payments Association’s 2025 merchant survey. The removal of the fixed £100 contactless ceiling in March 2026, which now lets banks set their own thresholds or remove them entirely, is expected to push higher-value transactions into contactless channels across hospitality, healthcare and luxury retail.

What merchants actually want now

The whitepaper identifies five factors that most influence POS selection and merchant loyalty: reliability and performance; ease of use; payment flexibility; integration with enterprise resource planning, CRM and e-commerce systems; and transparent pricing and support. The ordering matters. Integration sits in fourth place in the list but is positioned in the analysis as the primary emerging battleground, particularly for mid-market and enterprise merchants managing high transaction volumes across physical and digital channels.

Smaller merchants, typically onboarded through Independent Sales Organisations and carrying annual card turnover below £380,000, according to the PSR, are described as prioritising simplicity and rapid deployment. Cloud-based POS platforms that bundle sales reporting, inventory management and customer analytics are highlighted as increasingly accessible to that segment without demanding significant infrastructure investment.

Jean-Philippe Niedergang, acting group chief executive at Castles Technology, said: “For years, the conversation centred on accepting more payment methods. Today, that is simply the starting point. Merchants expect payment technology to become part of how they run their business. They want terminals that connect with wider operations, can be deployed and managed remotely and continue delivering value long after installation. Hardware has become table stakes.”

The ISO channel and managed services

The analysis places particular weight on the role of ISOs in shaping the competitive landscape. Industry estimates cited in the whitepaper suggest ISOs now account for more than half of new merchant acquisitions for UK card acquirers, with more than 60 ISO operators active in the market. The report argues that ISO differentiation is increasingly driven by deployment speed, device lifecycle management and ongoing support rather than the terminal hardware itself.

Castles Technology uses the whitepaper to highlight its own managed services product, CaSERV, which covers terminal configuration, deployment, 24/7 multilingual support, device monitoring, maintenance, refurbishment and compliant recycling. That commercial positioning is worth noting: the research is authored by the vendor and serves as a demand-generation asset, so the framing should be read accordingly.

Market context

The broader shift the whitepaper describes is well established among payment infrastructure analysts. POS has been absorbing adjacent software functions since the first wave of cloud-based tablet POS systems a decade ago, and the trajectory toward AI-assisted inventory and customer insight is visible across the sector. The report adds useful granularity on the UK ISO channel and the PSR’s merchant-segmentation data, but the competitive landscape it describes, in which terminal hardware commoditises and managed services become the margin opportunity, is not a novel thesis. Acquirers, ISOs and payment software vendors including several that compete directly with Castles Technology’s services layer have been pursuing the same logic for several years. The March 2026 contactless limit change is the most concrete near-term catalyst the whitepaper surfaces, and its effect on average transaction value in high-ticket verticals will be a meaningful data point to watch over the next two to three reporting periods.

The post Castles Technology: UK Merchants Now Expect More Than Payment Acceptance appeared first on The Fintech Times.