Accounting standards and prudential regulation are key elements of the financial system and are increasingly seen as complementary concepts despite their divergent objectives. This paper examines the growing convergence of accounting and Basel capital requirements in the wake of the latest financial crisis and reviews the empirical evidence on the risk behavioural and economic implications arising from the interactions. Loan loss provisioning under the IFRS 9 expected credit loss model as well as the prudential filter for unrealized fair value losses form the central link between accounting and regulatory capital as they align loss recognition and measurement methods. The remaining conceptual and methodological differences may trigger procyclical effects on banks’ capital and lending with negative consequences for financial stability. Based on the findings, the paper contributes to the discussion about a strict decoupling of the two systems to reconcile the conflict between accounting and regulatory objectives and identifies avenues for future research.