The cost of a missed NEC4 compensation event

What you need to know

The exception concerns events the Project Manager should have notified.
A Scope-change instruction is not a sound example of automatic time-bar loss.
Target adjustment, Defined Cost and Contractor’s share are separate.
Label financial scenarios and unresolved assumptions.

A missed notification can have serious consequences, but its financial effect depends on the event and contract. A six-figure cost entry is not automatically a six-figure lost entitlement.

Check whether the time bar applies

Standard NEC4 ECC clause 61.3 includes an eight-week time bar from the Contractor becoming aware that the event has happened. The exception concerns events the Project Manager should have notified. It is not limited to events the Project Manager actually notified.

Consequently, an example involving a Project Manager’s instruction changing Scope cannot simply assume that eight weeks without a Contractor notice extinguishes entitlement. Establish the instruction, authority, notification duty and any amendment first. NEC4 uses Scope; Works Information is the corresponding NEC3 term.

Establish the event before estimating the loss

Additional work, extra cost or a difference from a tender assumption does not by itself prove a compensation event. Identify the applicable ground, facts, notices and assessment rules. For a physical-conditions or weather event, apply the specific contractual test rather than a general description of unexpected conditions.

A diary can help explain the event and awareness date alongside instructions, correspondence and other evidence. It is not the only contemporaneous record and does not itself issue the contractual notification.

Separate price, payment and target share

Under Option A, an unimplemented change to the Prices and the Contractor’s expenditure are different figures. Under a target option, an event can affect the target while the payment and Contractor’s-share mechanisms continue to apply. An amount not added to the target is not automatically excluded from Defined Cost or lost again as an additional fixed pain-share amount.

For an illustrative calculation, assume an otherwise recoverable event would have increased an Option C target by £180,000, but an applicable time bar prevents that increase. If all associated cost remains allowable and a constant 50% share applies across the relevant range, the target-share effect could be £90,000. This simplified illustration excludes Fee and other adjustments; it is not a project valuation or a universal result.

Track potential exposure transparently

Identify the event and contractual basis.
Record awareness and notification dates with their evidence.
Check the Project Manager notification exception and amendments.
Separate estimated expenditure from the assessed change to Prices.
Model the selected option’s payment and share consequences.
Label unresolved entitlement and valuation assumptions.

Do not present a pipeline of potential events as guaranteed revenue. A useful register distinguishes detected issues, notified events, quotations and implemented assessments.

Turn records into timely action

Review records promptly, assign responsibility for notifications and retain delivery evidence. Software can help find and organise issues, but it cannot guarantee that every event is detected, the deadline is correct or entitlement survives. The commercial team must check the executed contract and facts.