Why delivery matters more than vision in payments reform

The UK has set its direction on a payments infrastructure overhaul. What matters now is how it is built and run in practice.

Vision in payments reform

For much of the past year, discussion around the UK’s payments reform has focused on direction: objectives, governance and high-level outcomes.

Those debates matter, but they rarely determine how national payments systems perform once they are live – writes Young Pham, Chief Strategy Officer at CI&T.

That tends to be decided later, during delivery, when early design decisions begin to limit, or enable, what the infrastructure can actually support.

The publication of the Strategy for Future Retail Payments Infrastructure by the Payments Vision Delivery Committee in November 2025 brought those delivery questions into view.

The strategy set out long-term aims and confirmed how HM Treasury and the authorities intend to work together over the coming years.

It also acknowledged that decisions about system design, sequencing and day-to-day operation tend to have lasting consequences once infrastructure is in live use, particularly for banks, payment providers and end users.

As attention turns from vision to implementation, the way the system is put together becomes the deciding factor in how it performs for banks, businesses and consumers over time.

Questions around who connects directly, how responsibility is allocated, how risk is handled as volumes grow and how new rails coexist with existing ones become central.

That is where experience from other widely used instant payments systems becomes most relevant.

What delivery looks like at scale

The National Payments Vision points to Brazil’s PIX as a leading example already operating at scale.

Brazil is certainly a useful place to start. The country has been operating an instant payments system embedded in everyday economic activity for several years, rather than confined to pilots or trials.

PIX was introduced in late 2020 as a central-bank operated instant payments platform, intended from the outset to support everyday payments across the economy rather than sit alongside existing schemes.

Participation by major banks and payment providers was mandated on a fixed timetable, which meant scale was not something the system could grow into gradually. It had to be ready to carry volume from the start.

That decision pushed work into the institutions themselves. Banks needed to adapt internal platforms for continuous availability, update routing for new identifiers such as phone numbers and QR codes, and manage fraud and settlement in real time across customer journeys that had previously relied on batch processing or limited operating windows.

We saw that work first‑hand inside Brazilian banks during large‑scale instant payments builds. Much of it sat below the surface, inside core systems that customers never see.

Adoption grew steadily as PIX was folded into routine activity, from person-to-person transfers through to retail payments and small business use. By 2024, the system was processing more than 60 billion transactions a year and had become a standard way for people to move money day to day.

As reliance increased, questions around transaction limits, access models, fraud controls and liability became operational concerns, handled daily by banks and payment providers responding to live behaviour. Choices made early in the build began to show up in practical ways, affecting cost, resilience and customer experience.

This is where PIX became instructive. As usage scaled, reliability, coordination and operational discipline took precedence in day‑to‑day running.

The system’s role as shared infrastructure became most apparent once payments were part of ordinary economic activity and delays or outages carried real consequences.

That experience matters because the UK is moving into a comparable stage.

With direction set and build work coming into focus, the questions that surface tend to be practical ones. They centre on how infrastructure performs under sustained use, at volume, and under pressure.

Inclusion is decided in operation, not intent

One of the consistent features of large instant payments systems is that inclusion tends to follow from how infrastructure is run, rather than from how it is described. Access rules, pricing structures and participation requirements all influence who uses a system in practice and how often, particularly once usage becomes habitual.

In Brazil, the combination of low cost and broad availability influenced how the system was used day to day. PIX became a widely used option for routine payments, taken up by individuals and small businesses alongside existing card and cash payment methods. Its reach expanded through everyday use rather than through targeted inclusion programmes.

The UK sits in a different position, but some of the pressures are familiar. For small firms, the cost and operational effort involved in accepting and managing multiple payment methods remains a practical consideration.

Cash continues to play an important role for parts of the population, while many digital payment tools have been designed primarily around convenience for the majority rather than ease of use across all users.

How a new payments infrastructure responds to those realities will depend on decisions made during build and rollout. The mechanics of onboarding, how costs are handled, and how reliably the system performs at busy times all influence whether new rails become part of routine economic activity or remain secondary options.

At national scale, these factors show up in routine transactions, affecting how people pay, how businesses get paid, and how much overhead sits in everyday activity.

Managing risk once payments are routine

As PIX usage increased, fraud and misuse followed. That was expected. What mattered was how responsibility and controls were handled once behaviour patterns became clear. Transaction limits, monitoring and response processes evolved over time as banks and payment providers dealt with live conditions rather than theoretical scenarios.

At scale, instant payments concentrate risk in different ways to batch-based systems. Errors travel faster. Irreversible transfers raise the stakes. Clear operational ownership becomes as important as technical capability.

These pressures tend to emerge gradually, through sustained use. They are rarely resolved at design stage. Instead, they are managed through governance, coordination and ongoing adjustment once systems are carrying meaningful volumes.

For the UK, this highlights the importance of clarity around responsibility as new infrastructure is introduced. How risk is handled in practice, across institutions and over time, will impact confidence in the system far more than stated safeguards alone.

The test ahead

The National Payments Vision describes the role payments are expected to play in the UK economy. The harder work now sits in how those expectations are carried into a system people and businesses use every day.

This is the stage where infrastructure programmes are usually defined. Not by their announcements, but by how they perform once people and businesses rely on them without thinking about it. What happens during build and early operation will determine how the UK’s payments infrastructure behaves for years to come.

Teams who have worked inside large‑scale instant payments builds will recognise the pressures that surface now, and the value of getting the practical decisions right from the start.