man-walking-across-open-area

FCA fines Monzo £21 million for financial crime control failures

Julie James, Director, Corporate Audit
17/07/2025
man-walking-across-open-area

Monzo, one of the UK’s leading digital challenger banks, has been fined £21 million by the Financial Conduct Authority (FCA) for significant failings in its financial crime controls. The fine follows a period of rapid growth for the bank, which saw its customer base expand from 250,000 in early 2017 to over 12 million by April 2025.

These weaknesses in Monzo’s financial crime controls left the bank exposed to significant risk. For example, the FCA found that Monzo allowed customers to open accounts using clearly implausible addresses—including well-known landmarks such as Buckingham Palace and 10 Downing Street—due to insufficient verification checks during onboarding. These failures in customer due diligence and risk assessment were compounded by Monzo’s breach of a regulatory requirement not to onboard high-risk customers. Despite this obligation, the bank opened over 34,000 accounts for individuals classified as high risk

The cost of compliance failures

The original fine was set at £30.1 million, but Monzo qualified for a 30% discount under the FCA’s settlement procedures, reducing the penalty to £21 million.

Beyond the financial penalty, the reputational damage could have broader implications, particularly as Monzo prepares for a potential public listing. Investor confidence may be shaken by concerns over the bank’s operational resilience and internal controls.

Lessons for the industry

This case serves as a stark reminder of the importance of robust financial crime frameworks. To avoid similar pitfalls, organisations should focus on the following areas.

  • Stringent training: Ensure that both junior and senior staff are well-trained on financial crime controls, including how to identify high-risk customers and flag suspicious activity, especially during onboarding.
  • Data integrity: Maintain accurate, complete, and up-to-date customer data that reflects the customer's risk profile. This includes verifying addresses, identifying duplicate accounts, and ensuring that customer information is consistent across systems. Identify what a customer’s ‘normal’ behaviour is so that the unusual can be identified.
  • Quality assurance: Implement strong quality assurance processes across all stages of customer review, particularly for high-risk accounts. This includes regular audits, system testing, and oversight of third-party providers involved in onboarding or transaction monitoring.
  • Operational resilience: Ensure that systems and outsourcing arrangements are resilient to disruption. This includes having contingency plans for system outages and clear escalation paths when issues arise.

Next steps

The FCA have signalled previously that they will act against firms that have weak AML procedures.

As part of our AML audit service, Crowe can help you review the key areas of your AML processes to ensure they are robust, meeting not only FCA requirements but the ever-changing threats from financial crime.

Our reviews cover the following areas:

  • reviewing the current controls and procedures you have in place
  • reviewing and testing your customer onboarding and monitoring systems
  • checking your people training programme.

If you would like to discuss the AML processes and procedures in your firm, please contact Julie James for more information.

Contact us


John Glasby
John Glasby
Head of Financial ServicesLondon