ClearBank: How an API-First Clearing Bank Powers UK Fintech

Most fintech brands compete for attention; ClearBank competes for the infrastructure mandate behind the brand. A customer might see a savings app, business-finance platform or digital wallet while the account, payment connection and protected deposit sit with a different regulated institution. ClearBank was designed for that second layer. It gives banks, payment firms, fintechs and selected companies a route into accounts and payment schemes without forcing every client to rebuild a clearing bank.

That makes ClearBank a useful case study in the institutional side of UK fintech. It is not merely banking software and not merely a sponsor bank. It is a PRA-authorised deposit taker with technology integrated into the operating model. To understand why that matters, pair this analysis with Kurums’ guides to the UK financial system and Bacs, Faster Payments and CHAPS.

Why did the UK need a new clearing bank?

Before the latest fintech wave, access to UK clearing and bank-account infrastructure was concentrated among established institutions with legacy technology and broad retail or wholesale businesses. A young payment company could connect indirectly through a sponsor, but the commercial terms, integration timetable and service design were often controlled by an institution for which fintech infrastructure was not the core product. That created a bottleneck between product innovation at the front end and regulated money movement at the back end.

Founder Nick Ogden began developing ClearBank in 2014. It received bank authorisation in 2016 and launched services in 2017, describing itself at launch as the first new UK clearing bank in more than 250 years. The strategic decision was to start with a cloud-based operating model and serve regulated businesses. Instead of attracting consumers with branches or a debit-card brand, ClearBank would make bank-grade infrastructure the product.

Is ClearBank a real bank or a banking-as-a-service provider?

It is a real bank. ClearBank Limited appears on the Bank of England’s list of PRA-regulated UK banks and carries Financial Services Register number 754568. It is authorised by the PRA and regulated by both the PRA and FCA. That status distinguishes the company from software vendors that connect clients to a third-party bank and from electronic-money institutions that safeguard funds but cannot accept deposits as a bank.

“Banking as a service” still describes part of the commercial outcome: another company embeds accounts and payments into its own proposition. But the legal entity underneath matters. Eligible deposits held at ClearBank can receive FSCS protection up to the applicable limit, currently £120,000 per eligible depositor per authorised institution. Protection depends on account design, ownership and eligibility; a fintech logo alone does not determine it.

How does agency banking work?

Agency banking allows a regulated financial institution to use ClearBank’s connections and operational infrastructure rather than becoming a direct participant in every payment scheme. The client can hold and move money, assign accounts and route transactions while ClearBank manages the scheme connection, settlement mechanics and specified compliance responsibilities. The precise division of work is contractual and regulatory, not a blanket transfer of responsibility.

This model converts a high fixed-cost capability into a service. Direct participation requires technology, liquidity, security, scheme testing, round-the-clock operations and governance. An agency client pays for access and usage instead. ClearBank gains operating leverage by serving many clients on shared infrastructure, while clients shorten the route from authorisation and product design to live payments.

What is embedded banking in ClearBank’s model?

Embedded banking moves the account into somebody else’s customer journey. A savings platform, wealth application, cryptocurrency firm or business service can present an account under its own interface while ClearBank provides the regulated deposit and payment layer. The partner normally owns distribution, onboarding experience and customer communication; ClearBank supplies the underlying account architecture, ledger events, payment connectivity and bank-level controls.

The arrangement is powerful because each side specialises. A fintech can focus on a narrow use case and build a distinctive experience. ClearBank can reuse secure infrastructure across partners. Yet the customer proposition must state clearly which entity provides which service, who holds the funds and what protection applies. Embedded finance becomes dangerous when the brand layer obscures the legal layer.

How do the APIs connect to UK payment rails?

A partner sends account and payment instructions through ClearBank’s API. ClearBank validates the request, applies controls, updates the relevant ledger and routes the transaction into the appropriate scheme. Faster Payments supports near-real-time account transfers; Bacs serves scheduled credits and Direct Debits; CHAPS handles high-value, time-critical payments. Status messages and balance changes return through APIs and webhooks so the partner can update its interface.

The API does not eliminate payment-system complexity; it standardises the client’s interface to it. Cut-off times, scheme rules, settlement liquidity, sanctions screening, fraud controls, recalls and exception handling still exist. ClearBank’s value is to absorb much of that complexity into a reusable platform while preserving the controls required of a regulated bank and scheme participant.

How large had ClearBank become by 2025?

ClearBank’s 2025 report shows an infrastructure business reaching material scale. The group ended the year with 279 live clients and £17.8 billion of client deposits, a 66% increase. It had opened 17.1 million accounts and processed 262 million payment-scheme transactions, with volumes up 58% in the annual-report presentation. Embedded-banking partners going live during the year included Revolut, LemFi, Coinbase and corporate partner PayCaptain.

The numbers should be interpreted carefully. Seventeen million accounts do not mean seventeen million direct ClearBank retail relationships; many sit behind partner propositions. Deposits are funding and a trust obligation, not revenue. Transaction volume signals platform usage, but unit economics depend on pricing, mix, infrastructure cost and risk. The business is best judged across fees, balances, resilience and capital—not with one headline metric.

Where does ClearBank’s revenue come from?

The model combines fee income with balance-sheet income. Clients can pay platform, account, transaction, payment, foreign-exchange and other service charges. ClearBank also earns net interest income by investing or placing deposit funding within its conservative banking framework. When rates rise, large client balances can make that spread more valuable; when rates fall, the same dependence can compress revenue.

Management has therefore emphasised recurring fees. The 2025 report said fee income represented 47% of statutory revenue, up from 39% in 2024. Group normalised revenue reached £121.6 million, while the UK bank produced £117.7 million and £12.2 million of pre-tax profit. A healthier mix reduces—but does not remove—sensitivity to central-bank rates and deposit behaviour.

Why does direct scheme access create an advantage?

A provider with direct connections can reduce layers between the client instruction and settlement. Fewer intermediaries can improve visibility, control, issue resolution and product speed. It can also make economics more transparent because a sponsor is not buying access from another sponsor. ClearBank markets direct access across the principal UK schemes as a core difference from providers that assemble the proposition through multiple third parties.

However, direct access is not automatically better for every client. The client still has to evaluate service levels, price, geographic coverage, safeguarding or deposit arrangements, change management and exit options. Infrastructure creates switching costs after accounts, payment flows and reconciliation are deeply integrated. Procurement therefore has to test long-term resilience, not only launch speed.

What creates the technology moat?

ClearBank’s moat is not a single API endpoint. It is the accumulated combination of regulatory permission, scheme connectivity, a production ledger, compliance operations, liquidity processes, client integrations and a history of passing supervisory scrutiny. Software can be copied more quickly than a functioning bank can be authorised, capitalised and trusted with billions of pounds of other people’s money.

The platform has also demonstrated scale. A ClearBank and Microsoft case study described growth from roughly 8,000 monthly payments after launch to 20 million a month by 2024. Cloud architecture can provide elasticity and deployment speed, but a bank must design for outages, cyber threats and third-party failure. Technology is defensible only when operational resilience grows with throughput.

How does ClearBank divide compliance with its partners?

Embedded banking is a chain of regulated and operational duties. The partner may perform customer acquisition, interface design and parts of onboarding or monitoring; ClearBank remains responsible for duties that attach to its bank, accounts, payments and scheme memberships. Contracts define tasks, but regulators expect each authorised firm to understand and oversee the risks it retains. Outsourcing an activity does not outsource accountability.

This makes partner selection a risk-control decision. A fast-growing client with weak onboarding, sanctions controls or complaint handling can expose the infrastructure bank to financial-crime, conduct and reputational risk. ClearBank needs monitoring, data access, escalation rights and the ability to restrict or terminate activity. Partners need clarity about service continuity and customer remediation if that occurs.

What are the main business-model risks?

Interest-rate exposure is the most visible economic risk. Deposit balances can generate valuable net interest income, but falling rates or changes in balance mix can reduce it. Client concentration also matters: a small number of rapidly scaling partners can contribute a large share of deposits or transactions. Losing one relationship, or having to restrict it for compliance reasons, can affect growth abruptly.

Operational and regulatory risks are equally important. A bank that sits behind many brands can become a point of systemic operational concentration. Outages propagate into partner apps; a control weakness can touch many end customers. International expansion adds new licences, currencies and local rules. Capital must support the bank while the group invests ahead of revenue in Europe and future markets.

What does the European expansion change?

ClearBank Europe received its Dutch banking licence in 2024. In its first full operating year it added 21 clients, reached 28 in total and exceeded one million monthly scheme transactions by year-end. The group also opened a Paris branch and expanded passporting across European markets. The strategy is to reuse the embedded-banking and clearing playbook beyond sterling.

Europe increases the addressable market but also tests whether the platform advantage travels. Local payment methods, customer expectations, regulatory supervisors and competitive sponsor-bank markets differ. The bank must balance reusable group technology with local legal and operational requirements. Early losses at a new subsidiary may be rational investment, but the group needs capital and execution discipline until fee and transaction scale catches up.

How should a fintech evaluate an infrastructure bank?

A buyer should map the complete money flow: legal account holder, deposit or safeguarding status, scheme path, settlement point, liquidity responsibility, reconciliation, fraud allocation and customer support. It should test API behaviour under failure, not only the happy path. Migration support, data portability, sub-account structure, reporting and exit assistance belong in the commercial decision.

The cheapest transaction price may not produce the lowest total cost. Manual exceptions, delayed launches, weak reconciliation or an outage can dwarf basis-point savings. Conversely, buying every possible module from one provider can increase dependency. Strong procurement separates capabilities that benefit from integration from those that need a second route, backup process or independent control.

What is the strategic lesson from ClearBank?

ClearBank shows that a fintech opportunity can exist inside regulated infrastructure rather than only at the customer interface. The company made authorisation, clearing access, ledger operations and APIs part of one product. Partners then used that product to create propositions ClearBank would not necessarily distribute itself. It is a wholesale platform model reinforced by a bank balance sheet.

The durable advantage depends on maintaining trust while scale compounds. A modern interface attracts integrations; resilient operations, sound capital and credible compliance retain them. If ClearBank can continue moving revenue toward recurring fees, diversify partners and transfer the model internationally without weakening controls, it can remain one of the institutional foundations beneath the UK fintech ecosystem.

Frequently Asked Questions

Primary Sources and Further Reading

This guide prioritises regulators, payment-system operators and company filings. Figures are the latest available at the July 2026 review date.

• ClearBank — 2025 Annual Report and Accounts
• ClearBank — 2025 results announcement
• ClearBank — About and regulatory status
• ClearBank — Embedded Banking
• ClearBank — Azure platform scale case study
• Bank of England — New banks authorised since 2013
• FSCS — Deposit protection limit