This Practice Note provides information on the leverage ratio requirements, set out in the Leverage Ratio (CRR) Part and the Leverage Ratio—Capital Requirements and Buffers Part of the Prudential Regulation Authority (PRA) Rulebook and in PRA Supervisory Statement SS45/15 The UK leverage ratio framework, which apply to UK banks, building societies and systemically important investment firms. The primary source for UK prudential requirements has been the onshored Capital Requirements Regulation (Assimilated Regulation (EU) 575/2013—UK CRR). The provisions of UK CRR are, however, in the process of being replaced by provisions in the PRA Rulebook and other PRA policy materials. For information, see Practice Note: Introduction to the UK prudential regime for banks, building societies and systemically important investment firms—UK CRR. Purpose of the leverage ratio requirements The leverage ratio requirements implement the leverage ratio provisions of the Basel Framework and are intended to restrict the build-up of leverage in the banking sector and so avoid the destabilising deleveraging processes that can be triggered by individual bank failures or general financial crises and cause damage to the broader financial