The numbers arrived, belatedly, finally, and nobody quite knew what to do.

Monzo profitable. Then Starling. Then Revolut posting £1.1 billion in pretax profit for 2024, a figure that put it ahead of some of the clearing banks it had spent a decade being compared unfavourably to. The sector that spent a decade being asked when it would make money had an answer. That was when we knew this wasn’t going to stop.

And to celebrate, the banks… issued a press release.

They are now members of an elite club. Fewer than five percent of neobanks reach profitability within 18 months of launch, according to Simon-Kucher & Partners. When the milestone comes it is genuinely rare. It is also, if handled correctly, one of the few moments in a bank’s life when it can change how it is perceived – not just by investors, but by the customers who still haven’t trusted it with their salary.

The conversion problem nobody is talking about

That last group is larger than the headline figures suggest. Monzo has twelve million customers. A third of them use it as a primary bank. Two-thirds do not. The gap between customer acquisition and primary account conversion is where challenger banks live now, and it is a communications problem as much as a product one. The deposit numbers make this concrete. Starling holds an average of £2,944 per account. Monzo holds £811. Both are profitable. Both are growing. The distance between those two figures is, in part, the distance between a bank that sounds like an institution and one that hasn’t yet mastered the register.

The founding narrative was always going to have a ceiling. You can build a bank on the promise that the old ones failed you. You can acquire millions of customers that way. What you cannot do, indefinitely, is ask those customers to trust you with their mortgage, their business account, their pension, while still talking in the register of a company that has something to prove. At some point the anger at Barclays fades. The question becomes not whether these banks are interesting but whether they are dependable.

What institutional credibility actually costs

Revolut understood this, eventually, and the understanding cost it considerably. Consider what the company had to dismantle before the Prudential Regulation Authority was satisfied. Its auditors, BDO, had been unable to verify £477 million of revenue due to the configuration of Revolut’s internal IT systems – a finding that triggered the replacement of BDO with EY and a complete rebuild of its financial reporting infrastructure. Its cap table carried six different share classes, the residue of successive funding rounds with SoftBank and others, and the Bank of England mandated their consolidation into a single class of ordinary shares before granting a licence. Its compliance workforce grew from 256 to 331 employees in 2023, then by a further 30 percent through 2024. The PRA extended the mobilisation period – which for most banks runs twelve months – to over twenty, specifically to ensure the firm had hired sufficient senior risk and compliance officers capable of challenging the leadership. That last condition is, in banking regulation, a term of art. It means the regulator did not yet believe the culture would permit dissent. To address this, Revolut introduced the Karma system: a points-based mechanism assessing employee adherence to compliance and risk protocols, designed to make accountability visible and measurable. The process, from first application to full authorisation, ran to 1,800 days.

Don’t mistake this for some cautionary tale of regulatory friction grinding down innovation. It is a record of what institutional credibility actually requires when you build it from scratch rather than inherit it. Revolut’s annual report for 2025 is no startup document: Transaction volumes up 65% year-on-year. Total customer balances at £50.2 billion. A US banking charter filed enroute. The five-year fight for a UK banking licence, which looked like a regulatory embarrassment at the time, was the thing that forced the company to build the governance infrastructure that serious depositors require. The communications caught up, slowly, with the reality.

What challenger banks should do at the profit milestone

Most challenger banks do not have that kind of forcing function. They will reach profitability, issue a table of numbers, quote their CEO about validation, and move on. They forget to use moment to reframe the institution – to signal, clearly and deliberately, that the bank asking for your current account business is not the same bank that launched on a waiting list seven years ago.

The transition is hard precisely because it requires abandoning language that feels like identity. Firms most shed these . They will do it through six months of positioning work before the results drop – the analyst briefings, the placed op-eds, the media relationships that mean a journalist reaches for your spokesperson when writing about the future of banking rather than only when your AML controls attract a fine. Monzo was fined £21.1 million by the FCA in July 2025 for inadequate anti-money laundering controls. The bank had completed its remediation programme. The fine still landed first in the search results.

Ten years of goodwill, and the FCA writes the lede. The paragraph below it matters too.

The same problem, different time zones

The UK’s challenger banks are not the only ones approaching this inflection point. In Singapore, where the Monetary Authority of Singapore issued its first digital full bank licences to GXS Bank and MariBank in 2022, the institutions are still young enough to be in the growth phase – but the primary account conversion question is already forming. In the United States, where Chime has built a customer base that rivals many regional banks without the regulatory infrastructure those banks carry, the trust deficit with older, higher-balance depositors is the defining constraint on the next phase of growth. In Hong Kong, the eight licensed virtual banks that launched between 2020 and 2022 face a market where the incumbents – HSBC, Hang Seng, Standard Chartered – have the kind of institutional depth that takes decades to acquire. In each of these markets, the pattern is the same: strong customer acquisition, weaker primary account conversion, and a communications posture that has not yet made the transition from challenger to institution.

The next phase of challenger banking will be won on trust, and trust is not built in an earnings release. It is built in the accumulation of credible material – the authoritative voice on a regulatory development, the data point that gets cited by the FT, the spokesperson who sounds like they understand the system rather than resent it. Forty percent of UK adults now have a digital-only bank account. The growth phase is not over. But the customers left to convert are not the ones who were angry at their old bank. They are the ones who need to be persuaded that the new one is permanent.

Jon Schubin runs content for Cognito