Prudential supervision is the oversight of financial institutions aimed at keeping them safe and sound, so that they can meet their obligations to depositors, policyholders and other creditors and do not threaten the wider financial system. It focuses on whether a firm holds enough capital and liquidity, how it measures and controls its risks, and whether its management and governance are fit to run it. Banks are the main subject, but insurers, investment firms, payment and e-money institutions and some crypto firms are also supervised on prudential lines.
Prudential supervision is usually contrasted with conduct supervision, which deals with how firms treat customers and behave in markets. Some countries give both jobs to one authority; others split them, as the United Kingdom does between the Prudential Regulation Authority and the Financial Conduct Authority. International standards for bank supervision are set by the Basel Committee on Banking Supervision.
What prudential supervisors look at
Supervisors assess a firm's resilience from several angles:
- Capital. Whether the firm holds enough regulatory capital to absorb losses, measured through risk-weighted capital ratios and a leverage ratio under the Basel III framework for banks.
- Liquidity and funding. Whether it can meet outflows under stress, measured for banks by the liquidity coverage ratio and the net stable funding ratio.
- Asset quality and risk management. How the firm identifies, measures and controls credit, market, operational, interest rate and concentration risks.
- Governance. Whether the board and senior managers are competent and honest, and whether internal audit, risk and compliance functions are independent and effective.
- Recovery and resolution. Whether the firm has credible plans to recover from severe stress, and whether authorities could resolve it without public money if it failed.
How supervision is carried out
Prudential supervision combines continuous monitoring with periodic deep reviews. Firms submit regular regulatory reporting on capital, liquidity, large exposures and financial results. Supervisors analyse this data, hold meetings with management, and carry out on-site inspections or regulatory examinations that test controls and loan files. Many authorities run stress tests to see how firms would cope with a severe recession or market shock.
Modern supervision is risk-based: authorities devote most attention to the largest and riskiest firms, while smaller institutions face lighter, more periodic review. Supervisors can set firm-specific requirements on top of the minimum rules, such as additional capital for risks not captured by standard formulas. Where problems are found, they can require remediation plans, restrict dividends or growth, change management and, in the last resort, withdraw a licence.
Who carries out prudential supervision
Arrangements differ by country. In the euro area, the European Central Bank directly supervises significant banks through the Single Supervisory Mechanism, working with national authorities that supervise smaller banks. In the United States, prudential supervision of banks is shared between the Office of the Comptroller of the Currency, the Federal Reserve, the FDIC and state regulators, depending on charter and membership. Many countries place supervision inside the central bank; others use a separate agency.
Prudential rules for non-bank payment firms
Payment institutions and electronic money institutions face a lighter prudential regime than banks because they do not lend customer funds. In the European Union and United Kingdom they must hold minimum initial capital, maintain own funds calculated by prescribed methods, and protect customer money through safeguarding rather than deposit insurance. Supervisors have increased their attention to these firms after failures in which safeguarding records were incomplete, and stablecoin regimes in several jurisdictions now add reserve and liquidity requirements.
Microprudential and macroprudential approaches
Traditional prudential supervision is microprudential: it looks at the safety of each firm on its own. Since the 2007 to 2009 financial crisis, authorities have added macroprudential regulation, which looks at risks across the whole system, such as rapid credit growth, interconnected exposures and systemic risk from large institutions. Tools such as countercyclical capital buffers and extra charges for systemically important banks connect the two approaches.
Critics argue that prudential supervision can be too slow to act on warning signs, too dependent on firms' own models, and vulnerable to pressure from the industry it oversees. Others argue that heavy requirements raise costs and push activity into less regulated shadow banking. Debate continues over how much judgement supervisors should exercise beyond the written rules.