The Community Infrastructure Levy (CIL) Liability Ratio shows the proportion of CIL costs in relation to the total gross development value (GDV) or overall project costs. In UK property development finance, this ratio indicates the relative weight of planning obligations within the capital structure. A higher CIL Liability Ratio can signal increased planning-related risk, tighter cashflow, and potential challenges refinancing. SME developers and lenders use this metric, alongside Loan to Value and debt service ratios, to assess financial resilience, manage planning cost exposure, and inform funding negotiations within the UK property development finance market.
This sits beneath Planning & Legal Risk, introducing a more specific variant of the measure without changing its core interpretation. It is commonly considered alongside S106 Burden Ratio, as both are closely related measures used to assess similar aspects of performance or risk.
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