The UK payments overhaul has entered a phase that will make or break the entire programme. While the strategy side grabbed early headlines, the delivery stage is where things get real for banks, fintechs, and consumers.
Young Pham, chief strategy officer and SVP at CI&T, recently shared his take on how the UK payments overhaul must now translate policy ambitions into working systems. His insights point to one unavoidable truth: decisions made during implementation will echo for decades.
UK Payments Overhaul Moves from Strategy to Build
For nearly a year, most conversations about the National Payments Vision stayed at the strategy level. Governance frameworks, headline goals, and aspiration documents dominated the agenda. Yet strategy alone never built a payment system.
In November 2025, the Payments Vision Delivery Committee published its Strategy for Future Retail Payments Infrastructure. That document marked a genuine turning point for the UK payments overhaul because it set out how HM Treasury and associated authorities plan to work together on delivery. More importantly, it acknowledged something insiders already knew: early implementation choices create permanent consequences.
So the question has shifted. It is no longer about what the UK’s payments infrastructure should achieve. Instead, the focus falls squarely on how it will be built, tested, and operated at scale.
5 Delivery Challenges Facing the UK Payments Overhaul
The Payments Vision Delivery Committee recently unveiled its Payments Forward Plan, and several critical delivery questions now sit at the centre of the UK payments overhaul. The FCA confirmed the plan sets out a three-year regulatory roadmap [NEW] covering retail and wholesale payments alongside digital assets. Consider these five challenges that will shape the outcome.
First, who connects directly to the new infrastructure? Participation rules will determine the breadth of competition in UK payments for years to come.
Second, how will responsibilities be allocated between regulators, banks, and technology providers? Blurred accountability tends to surface only during a crisis, and by then it is too late. The plan itself includes timelines for consolidating the PSR into the FCA, reviewing retained EU payments law, and implementing a fee cap for systemic payment systems [NEW], so clarity on who owns what is already overdue.
Third, what strategies will manage growing transaction volumes? Moving from batch processing to real-time settlement puts entirely different stress on every layer of the tech stack.
Fourth, how will existing payment rails integrate with the new systems without creating gaps in service? Legacy migration is consistently the messiest part of any infrastructure programme, and the UK payments overhaul is no exception.
Fifth, what can the UK learn from other countries that have already rolled out national-scale instant payment systems? Answers to that question sit mostly in Brazil.
Brazil’s PIX Offers a Practical Blueprint
The National Payments Vision specifically calls out Brazil’s PIX as an example of a scalable instant payments platform. This is not just a nod to good policy design. PIX has operated in the wild for several years, handling real money in a real economy, which makes it one of the best reference points for the UK payments overhaul.
Brazil’s central bank launched PIX in late 2020 with a clear mandate: facilitate ordinary payments across the entire economy. Large banks and payment providers had no choice about participation. They were required to join on a fixed timeline, meaning the system had to be robust from day one. By 2024, PIX had processed 63.8 billion transactions, a 52% increase from the prior year [NEW], cementing its place as the dominant payment method in Brazil.
That requirement forced financial institutions to upgrade their internal systems for continuous availability. Banks also built new payment routing for identifiers like phone numbers and QR codes, alongside real-time fraud monitoring and settlement processes. Most of this complexity played out behind the scenes, invisible to consumers but critical to keeping the whole thing running.
Access and Pricing Drive Adoption More Than Policy Goals
One of the clearest lessons from PIX involves what happens after the system goes live. In large-scale instant payment systems, practical operation tends to determine who uses the platform and how often. Access rules, pricing strategies, and participation requirements shape user behaviour far more than launch-day press releases.
Brazil kept transaction costs low and access wide open. That combination turned PIX into a default option for daily payments. Both individuals and small businesses adopted it alongside cash and cards, not because of a targeted financial inclusion campaign, but because it was simply easier and cheaper to use. Consistent, habitual use drove growth. The platform now commands roughly 40% of Brazil’s e-commerce payment share, with projections pushing that to 51% by 2027 [NEW].
This matters for the UK payments overhaul because pricing and access decisions will either encourage or discourage broad adoption. Industry voices have already noted the Payments Forward Plan must translate into tangible results quickly, particularly around open banking and account-to-account payments [NEW]. Getting these settings right from the start is non-negotiable. Retrospective adjustments rarely recover lost momentum.
Fraud, Risk, and Responsibility Grow with Scale
Greater usage of PIX also brought fraud challenges. As more people transacted in real time, the system attracted bad actors who exploited the speed and finality of instant transfers. Fraud linked to PIX surged 43% to reach R$2.7 billion [NEW], pushing Brazil’s central bank to impose transaction limits on unregistered devices and tighten security requirements across the board.
The response in Brazil focused on refining transaction limits, monitoring practices, and response mechanisms. Banks and payment providers adjusted to real-world conditions rather than relying on pre-launch risk models. More recently, the central bank launched a self-service dispute button that lets users challenge fraudulent Pix transfers directly from their banking app [NEW], strengthening consumer protection. That distinction matters because theoretical fraud projections rarely match what happens when millions of people start moving money in milliseconds.
For the UK payments overhaul, this raises a pointed question about concentrated risk. Instant payment systems differ fundamentally from batch-based architectures. Errors propagate faster. Irreversible transfers raise the stakes on every transaction. Clear operational responsibilities become just as important as technical capability, and the UK payments overhaul must define both before going live.
What Happens Next Will Define the UK Payments Overhaul
Ultimately, the success of the UK payments overhaul comes down to practical outcomes. No one will remember the strategy documents or the committee meetings. People will remember how the system performed when it mattered most.
This next phase demands focus on system sequencing, risk distribution, and coordination protocols for critical incidents. The Payments Association’s 2026 outlook [NEW] reinforces this point, describing a decisive period where fraud policy, safeguarding standards, and infrastructure delivery must converge. It also requires honest conversations about what happens when things go wrong, because in complex payment infrastructure, something always goes wrong eventually.
The UK payments overhaul has a strong strategic foundation. Whether that foundation supports a system people trust and use every day depends entirely on what gets built next.