Two countries, one idea, different roads
Open banking sounds like a single thing. A customer lets a third party see their account data or start a payment, and the bank has to cooperate. In practice, the UK and Nigeria reached that idea by very different roads, and the differences explain a lot about what you can and cannot build in each place.
This is a comparison of design and policy, not a ranking. Both markets are still evolving, and details change, so treat what follows as a map of the main ideas rather than a legal reference.
How the UK got there
The UK's version was largely a competition intervention. The competition regulator investigated retail banking and concluded that incumbent banks held too much power over customer data. The remedy was to require the largest banks to open their data to authorised third parties through standardised interfaces, with the customer's consent.
Two things followed from that origin. First, it was mandatory and specific. The biggest banks had to build to a common technical standard, delivered through a dedicated implementation body. Second, it was tied to a regulatory framework that already existed in Europe, the second Payment Services Directive, which created regulated roles for account information providers and payment initiation providers.
The result is a market with a well defined rulebook, a consent model that customers see in practice, and a certain amount of friction: re authentication requirements, consent renewals and the occasional uneven bank implementation.
How Nigeria got there
Nigeria's path started from a different place. The central bank published open banking regulatory guidelines that set out how data should be shared between banks and other participants, including principles on consent, data classification and risk. The motivation was less about breaking up concentrated incumbents and more about widening access, supporting innovation and bringing more people into formal financial services.
The approach is also shaped by the existing infrastructure. Nigeria already has strong shared payment rails and a national identity layer in the form of the bank verification number. Open banking sits alongside those, and in practice there is a lot of attention on how it fits with them rather than replacing them.
Implementation has been phased and has depended on participants, standards and API availability maturing over time. If you are building, expect to confirm the current status of each institution's offering rather than assume uniform coverage.
Where the designs differ
A few contrasts are worth holding in mind.
- Origin. The UK started from a competition remedy aimed at the largest banks. Nigeria started from a regulatory framework aimed at wider participation and access.
- Standardisation. The UK leans on a single, centrally defined API standard. Nigeria's framework sets principles and expectations, with the detail of implementation left to develop across participants.
- Participants. The UK rules lean heavily on defined, authorised roles. Nigeria's guidelines classify participants by risk and data type.
- Surrounding infrastructure. The UK sits inside a wider European style payments regime. Nigeria builds on local rails, identity systems and a fast growing digital payments habit.
None of these is simply better. A strict standard produces predictability. A looser framework can move quickly, but costs integrators more effort per bank.
What this means if you are building
For a product team, the practical consequences are concrete.
In the UK, you will usually need to be authorised, or work under someone who is, before you touch regulated data or initiate payments. Your design problem is largely about consent: making renewal and revocation understandable, and handling the differences between banks gracefully.
In Nigeria, your design problem is often coverage and reliability. You may find that connecting to the institutions your customers actually use is the real work, and that you need fallbacks for the ones whose interfaces are not yet ready. Data protection obligations under the Nigeria Data Protection Act 2023 also apply, so the consent and purpose limits you design around are not optional extras.
For a business operating in both, there is a trap: assuming that an integration pattern built for one market transfers cleanly. Consent flows, error behaviour, authentication steps and even the meaning of an account differ. It is better to build a thin internal abstraction and let each market sit behind its own adapter.
The question of trust and security
Both systems depend on customers being willing to hand over access, and that willingness rests on trust. In practice that means strong authentication, clear explanation of what is being shared and for how long, and an easy way to withdraw consent. Designs that bury these steps get abandoned, or worse, produce customers who click through without understanding.
For providers, it also means thinking about liability. When something goes wrong in a chain that includes a bank, a third party and a customer, who is responsible? The answers are written down differently in each market, and a product team should read them before launch rather than after the first dispute.
What each can learn from the other
The UK's experience shows that standards pay off, but that a standard alone does not guarantee a good customer experience. Consent fatigue and uneven bank behaviour were real lessons. Regulators and banks learned that user journeys have to be tested, not only specified.
Nigeria's setting offers a different lesson. Strong shared rails and identity infrastructure can give open banking a head start on things like verification and payments, if the new layer is designed to work with them instead of around them.
A practical way to think about it
Do not copy the other market's playbook wholesale. Borrow the ideas that fit and test the rest.
If you are deciding where to build first, ask three questions. What data or payment function does my product actually need? Which institutions do my customers use, and are their interfaces ready today? And what consent and data protection obligations apply to the way I plan to use the data?
The honest answer in both countries is that the policy is only half the story. The other half is how well each bank has built, and how well you have designed for the days when something does not work.