Extension of Time (EOT)

Extension of Time (EOT) is the contractual mechanism by which the Contractor's obligation to complete by a specified date is extended because of delays caused by events for which the Employer bears risk. Without an EOT mechanism, any delay beyond the agreed Completion Date exposes the Contractor to liquidated damages, even if the delay was caused by the Employer — which would be commercially unreasonable. The EOT mechanism operates on the principle that the Contractor should not bear time risk for events outside their control, provided the event is properly notified and assessed.

Different contracts handle EOT differently. Under NEC4, EOT is delivered through the compensation event process — the Project Manager assesses the time impact of a compensation event and adjusts the Accepted Programme's Completion Date accordingly. Under JCT contracts, EOT is a separate process with specified Relevant Events and a formal EOT application procedure. Under FIDIC, the Engineer assesses EOT under Sub-Clause 8.4. Each has its own notification requirements, assessment procedures and evidential standards.

For project controls, EOT is where time management discipline becomes commercial. An EOT application supported by a defensible Time Impact Analysis and a clear audit trail of causation typically succeeds; an EOT application based on assertion or incomplete records does not. The difference is not whether the delay occurred — it is whether the records can prove the delay and its cause. Contractors who run disciplined contemporaneous records tend to succeed on EOT; those who reconstruct claims retrospectively tend to struggle.