How is concurrent delay treated in Singapore?

Answer

The position is not fully settled. Standard forms such as PSSCOC tell the certifier to take concurrent contractor delays into account, but do not define concurrency. Singapore courts have reduced a party's delay liability where other events also contributed, and have analysed loss by asking whether a breach was an effective or dominant cause. The safest course is to define concurrent delay and its consequences in the contract.

From the RRD Field Guide, checked against the sources cited in Liquidated Damages and Extension of Time in Singapore: An Owner's and Contractor's Guide. General information, not advice for your project.

The fuller picture

In Singapore, a liquidated damages clause is enforceable if it is a genuine pre-estimate of loss and not a penalty; the Court of Appeal in Denka Advantech (2020) kept the traditional Dunlop test and declined the UK Cavendish approach. LDs only run for delay the contractor is responsible for, so the contract needs a clear extension-of-time clause, notice rules and a certification step.

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