QS Certification Lag refers to the delay between a quantity surveyor (QS) certifying progress on construction works and the lender releasing the corresponding property development finance funds. In UK development finance, this lag can significantly impact on-site cash flow and the timing of payments to contractors, potentially affecting overall construction sequencing. The length of the lag varies depending on lender procedures, loan terms and administrative efficiency. Developers should carefully plan for this delay when arranging finance, as underestimating it may lead to working capital shortfalls, project delays or increased reliance on contingency funds.
This sits beneath Drawdown Structure & Phasing, introducing a more specific variant of the measure without changing its core interpretation. It is commonly considered alongside Draw Variance vs Plan, as both are closely related measures used to assess similar aspects of performance or risk. In funding terms, QS Certification Lag is most commonly encountered in connection with Speculative Build Loan within the property development capital stack.
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